Switch to using Flatcar Linux images on Google Cloud

* Use the official Kinvolk Flatcar Linux image on Google Cloud * Change `os_image` from a custom image name to `flatcar-stable` (default), `flatcar-beta`, or `flatcar-alpha` (**action required**) * Change `os_image` from a required to an optional variable * Promote Typhoon on Flatcar Linux / Google Cloud to stable * Remove docs about needing to upload a Flatcar Linux image manually on Google Cloud and drop support for custom images
Update Kubernetes from v1.23.2 to v1.23.3
2025-08-03 02:01:33 +02:00 · 2022-01-28 21:04:10 -08:00 · 2022-01-27 09:23:37 -08:00 · 2022-01-27 09:02:30 -08:00
65 changed files with 194 additions and 177 deletions
--- a/CHANGES.md
+++ b/CHANGES.md
@ -4,6 +4,20 @@ Notable changes between versions.

 ## Latest

+## V1.23.3
+
+* Kubernetes [v1.23.3](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.23.md#v1233)
+
+### Flatcar Linux
+
+#### Google Cloud
+
+* Switch to using official Kinvolk Flatcar Linux images
+* Promote Typhoon on Flatcar Linux / Google Cloud to stable
+* Change `os_image` to `flatcar-stable`, `flatcar-beta`, or `flatcar-alpha` (**action required**)
+
+## v1.23.2
+
 * Kubernetes [v1.23.2](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.23.md#v1232)
 * Remove Kubelet flag `--network-plugin`. Unused since `docker-shim` isn't used ([#1106](https://github.com/poseidon/typhoon/pull/1106))

--- a/README.md
+++ b/README.md
@ -11,7 +11,7 @@ Typhoon distributes upstream Kubernetes, architectural conventions, and cluster

 ## Features <a href="https://www.cncf.io/certification/software-conformance/"><img align="right" src="https://storage.googleapis.com/poseidon/certified-kubernetes.png"></a>

-* Kubernetes v1.23.2 (upstream)
+* Kubernetes v1.23.3 (upstream)
 * Single or multi-master, [Calico](https://www.projectcalico.org/) or [Cilium](https://github.com/cilium/cilium) or [flannel](https://github.com/coreos/flannel) networking
 * On-cluster etcd with TLS, [RBAC](https://kubernetes.io/docs/admin/authorization/rbac/)-enabled, [network policy](https://kubernetes.io/docs/concepts/services-networking/network-policies/), SELinux enforcing
 * Advanced features like [worker pools](https://typhoon.psdn.io/advanced/worker-pools/), [preemptible](https://typhoon.psdn.io/flatcar-linux/google-cloud/#preemption) workers, and [snippets](https://typhoon.psdn.io/advanced/customization/#hosts) customization
@ -43,7 +43,7 @@ Typhoon is available for [Flatcar Linux](https://www.flatcar-linux.org/releases/
 | Azure         | Flatcar Linux    | [azure/flatcar-linux/kubernetes](azure/flatcar-linux/kubernetes) | alpha |
 | Bare-Metal    | Flatcar Linux    | [bare-metal/flatcar-linux/kubernetes](bare-metal/flatcar-linux/kubernetes) | stable |
 | DigitalOcean | Flatcar Linux  | [digital-ocean/flatcar-linux/kubernetes](digital-ocean/flatcar-linux/kubernetes) | beta |
-| Google Cloud  | Flatcar Linux  | [google-cloud/flatcar-linux/kubernetes](google-cloud/flatcar-linux/kubernetes) | beta |
+| Google Cloud  | Flatcar Linux  | [google-cloud/flatcar-linux/kubernetes](google-cloud/flatcar-linux/kubernetes) | stable |

 | Platform      | Operating System | Terraform Module | Status |
 |---------------|------------------|------------------|--------|
@ -62,7 +62,7 @@ Define a Kubernetes cluster by using the Terraform module for your chosen platfo

 ```tf
 module "yavin" {
-  source = "git::https://github.com/poseidon/typhoon//google-cloud/fedora-coreos/kubernetes?ref=v1.23.2"
+  source = "git::https://github.com/poseidon/typhoon//google-cloud/fedora-coreos/kubernetes?ref=v1.23.3"

  # Google Cloud
  cluster_name  = "yavin"
@ -101,9 +101,9 @@ In 4-8 minutes (varies by platform), the cluster will be ready. This Google Clou
 $ export KUBECONFIG=/home/user/.kube/configs/yavin-config
 $ kubectl get nodes
 NAME                                       ROLES    STATUS  AGE  VERSION
-yavin-controller-0.c.example-com.internal  <none>   Ready   6m   v1.23.2
-yavin-worker-jrbf.c.example-com.internal   <none>   Ready   5m   v1.23.2
-yavin-worker-mzdm.c.example-com.internal   <none>   Ready   5m   v1.23.2
+yavin-controller-0.c.example-com.internal  <none>   Ready   6m   v1.23.3
+yavin-worker-jrbf.c.example-com.internal   <none>   Ready   5m   v1.23.3
+yavin-worker-mzdm.c.example-com.internal   <none>   Ready   5m   v1.23.3
 ```

 List the pods.
--- a/aws/fedora-coreos/kubernetes/README.md
+++ b/aws/fedora-coreos/kubernetes/README.md
@ -11,7 +11,7 @@ Typhoon distributes upstream Kubernetes, architectural conventions, and cluster

 ## Features <a href="https://www.cncf.io/certification/software-conformance/"><img align="right" src="https://storage.googleapis.com/poseidon/certified-kubernetes.png"></a>

-* Kubernetes v1.23.2 (upstream)
+* Kubernetes v1.23.3 (upstream)
 * Single or multi-master, [Calico](https://www.projectcalico.org/) or [Cilium](https://github.com/cilium/cilium) or [flannel](https://github.com/coreos/flannel) networking
 * On-cluster etcd with TLS, [RBAC](https://kubernetes.io/docs/admin/authorization/rbac/)-enabled, [network policy](https://kubernetes.io/docs/concepts/services-networking/network-policies/), SELinux enforcing
 * Advanced features like [worker pools](https://typhoon.psdn.io/advanced/worker-pools/), [spot](https://typhoon.psdn.io/fedora-coreos/aws/#spot) workers, and [snippets](https://typhoon.psdn.io/advanced/customization/#hosts) customization
--- a/aws/fedora-coreos/kubernetes/bootstrap.tf
+++ b/aws/fedora-coreos/kubernetes/bootstrap.tf
@ -1,6 +1,6 @@
 # Kubernetes assets (kubeconfig, manifests)
 module "bootstrap" {
-  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=f45deec67e2fea4f06b5a3edad628b0fe0e9ec60"
+  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=26bea83b957d18b99e16435405983181c4a6e159"

  cluster_name          = var.cluster_name
  api_servers           = [format("%s.%s", var.cluster_name, var.dns_zone)]
--- a/aws/fedora-coreos/kubernetes/fcc/controller.yaml
+++ b/aws/fedora-coreos/kubernetes/fcc/controller.yaml
@ -56,7 +56,7 @@ systemd:
        After=afterburn.service
        Wants=rpc-statd.service
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        EnvironmentFile=/run/metadata/afterburn
        ExecStartPre=/bin/mkdir -p /etc/cni/net.d
        ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
@ -126,7 +126,7 @@ systemd:
            --volume /opt/bootstrap/assets:/assets:ro,Z \
            --volume /opt/bootstrap/apply:/apply:ro,Z \
            --entrypoint=/apply \
-            quay.io/poseidon/kubelet:v1.23.2
+            quay.io/poseidon/kubelet:v1.23.3
        ExecStartPost=/bin/touch /opt/bootstrap/bootstrap.done
        ExecStartPost=-/usr/bin/podman stop bootstrap
 storage:
--- a/aws/fedora-coreos/kubernetes/workers/fcc/worker.yaml
+++ b/aws/fedora-coreos/kubernetes/workers/fcc/worker.yaml
@ -29,7 +29,7 @@ systemd:
        After=afterburn.service
        Wants=rpc-statd.service
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        EnvironmentFile=/run/metadata/afterburn
        ExecStartPre=/bin/mkdir -p /etc/cni/net.d
        ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
@ -94,7 +94,7 @@ systemd:
        [Unit]
        Description=Delete Kubernetes node on shutdown
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        Type=oneshot
        RemainAfterExit=true
        ExecStart=/bin/true
--- a/aws/flatcar-linux/kubernetes/README.md
+++ b/aws/flatcar-linux/kubernetes/README.md
@ -11,7 +11,7 @@ Typhoon distributes upstream Kubernetes, architectural conventions, and cluster

 ## Features <a href="https://www.cncf.io/certification/software-conformance/"><img align="right" src="https://storage.googleapis.com/poseidon/certified-kubernetes.png"></a>

-* Kubernetes v1.23.2 (upstream)
+* Kubernetes v1.23.3 (upstream)
 * Single or multi-master, [Calico](https://www.projectcalico.org/) or [Cilium](https://github.com/cilium/cilium) or [flannel](https://github.com/coreos/flannel) networking
 * On-cluster etcd with TLS, [RBAC](https://kubernetes.io/docs/admin/authorization/rbac/)-enabled, [network policy](https://kubernetes.io/docs/concepts/services-networking/network-policies/)
 * Advanced features like [worker pools](https://typhoon.psdn.io/advanced/worker-pools/), [spot](https://typhoon.psdn.io/flatcar-linux/aws/#spot) workers, and [snippets](https://typhoon.psdn.io/advanced/customization/#hosts) customization
--- a/aws/flatcar-linux/kubernetes/bootstrap.tf
+++ b/aws/flatcar-linux/kubernetes/bootstrap.tf
@ -1,6 +1,6 @@
 # Kubernetes assets (kubeconfig, manifests)
 module "bootstrap" {
-  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=f45deec67e2fea4f06b5a3edad628b0fe0e9ec60"
+  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=26bea83b957d18b99e16435405983181c4a6e159"

  cluster_name          = var.cluster_name
  api_servers           = [format("%s.%s", var.cluster_name, var.dns_zone)]
--- a/aws/flatcar-linux/kubernetes/cl/controller.yaml
+++ b/aws/flatcar-linux/kubernetes/cl/controller.yaml
@ -57,7 +57,7 @@ systemd:
        After=coreos-metadata.service
        Wants=rpc-statd.service
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        EnvironmentFile=/run/metadata/coreos
        ExecStartPre=/bin/mkdir -p /etc/cni/net.d
        ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
@ -121,7 +121,7 @@ systemd:
        Type=oneshot
        RemainAfterExit=true
        WorkingDirectory=/opt/bootstrap
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        ExecStart=/usr/bin/docker run \
            -v /etc/kubernetes/pki:/etc/kubernetes/pki:ro \
            -v /opt/bootstrap/assets:/assets:ro \
--- a/aws/flatcar-linux/kubernetes/workers/cl/worker.yaml
+++ b/aws/flatcar-linux/kubernetes/workers/cl/worker.yaml
@ -29,7 +29,7 @@ systemd:
        After=coreos-metadata.service
        Wants=rpc-statd.service
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        EnvironmentFile=/run/metadata/coreos
        ExecStartPre=/bin/mkdir -p /etc/cni/net.d
        ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
@ -96,7 +96,7 @@ systemd:
        [Unit]
        Description=Delete Kubernetes node on shutdown
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        Type=oneshot
        RemainAfterExit=true
        ExecStart=/bin/true
--- a/azure/fedora-coreos/kubernetes/README.md
+++ b/azure/fedora-coreos/kubernetes/README.md
@ -11,7 +11,7 @@ Typhoon distributes upstream Kubernetes, architectural conventions, and cluster

 ## Features <a href="https://www.cncf.io/certification/software-conformance/"><img align="right" src="https://storage.googleapis.com/poseidon/certified-kubernetes.png"></a>

-* Kubernetes v1.23.2 (upstream)
+* Kubernetes v1.23.3 (upstream)
 * Single or multi-master, [Calico](https://www.projectcalico.org/) or [Cilium](https://github.com/cilium/cilium) or [flannel](https://github.com/coreos/flannel) networking
 * On-cluster etcd with TLS, [RBAC](https://kubernetes.io/docs/admin/authorization/rbac/)-enabled, [network policy](https://kubernetes.io/docs/concepts/services-networking/network-policies/), SELinux enforcing
 * Advanced features like [worker pools](https://typhoon.psdn.io/advanced/worker-pools/), [spot priority](https://typhoon.psdn.io/fedora-coreos/azure/#low-priority) workers, and [snippets](https://typhoon.psdn.io/advanced/customization/#hosts) customization
--- a/azure/fedora-coreos/kubernetes/bootstrap.tf
+++ b/azure/fedora-coreos/kubernetes/bootstrap.tf
@ -1,6 +1,6 @@
 # Kubernetes assets (kubeconfig, manifests)
 module "bootstrap" {
-  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=f45deec67e2fea4f06b5a3edad628b0fe0e9ec60"
+  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=26bea83b957d18b99e16435405983181c4a6e159"

  cluster_name = var.cluster_name
  api_servers  = [format("%s.%s", var.cluster_name, var.dns_zone)]
--- a/azure/fedora-coreos/kubernetes/fcc/controller.yaml
+++ b/azure/fedora-coreos/kubernetes/fcc/controller.yaml
@ -53,7 +53,7 @@ systemd:
        Description=Kubelet (System Container)
        Wants=rpc-statd.service
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        ExecStartPre=/bin/mkdir -p /etc/cni/net.d
        ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
        ExecStartPre=/bin/mkdir -p /opt/cni/bin
@ -121,7 +121,7 @@ systemd:
            --volume /opt/bootstrap/assets:/assets:ro,Z \
            --volume /opt/bootstrap/apply:/apply:ro,Z \
            --entrypoint=/apply \
-            quay.io/poseidon/kubelet:v1.23.2
+            quay.io/poseidon/kubelet:v1.23.3
        ExecStartPost=/bin/touch /opt/bootstrap/bootstrap.done
        ExecStartPost=-/usr/bin/podman stop bootstrap
 storage:
--- a/azure/fedora-coreos/kubernetes/workers/fcc/worker.yaml
+++ b/azure/fedora-coreos/kubernetes/workers/fcc/worker.yaml
@ -26,7 +26,7 @@ systemd:
        Description=Kubelet (System Container)
        Wants=rpc-statd.service
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        ExecStartPre=/bin/mkdir -p /etc/cni/net.d
        ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
        ExecStartPre=/bin/mkdir -p /opt/cni/bin
@ -89,7 +89,7 @@ systemd:
        [Unit]
        Description=Delete Kubernetes node on shutdown
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        Type=oneshot
        RemainAfterExit=true
        ExecStart=/bin/true
--- a/azure/flatcar-linux/kubernetes/README.md
+++ b/azure/flatcar-linux/kubernetes/README.md
@ -11,7 +11,7 @@ Typhoon distributes upstream Kubernetes, architectural conventions, and cluster

 ## Features <a href="https://www.cncf.io/certification/software-conformance/"><img align="right" src="https://storage.googleapis.com/poseidon/certified-kubernetes.png"></a>

-* Kubernetes v1.23.2 (upstream)
+* Kubernetes v1.23.3 (upstream)
 * Single or multi-master, [Calico](https://www.projectcalico.org/) or [Cilium](https://github.com/cilium/cilium) or [flannel](https://github.com/coreos/flannel) networking
 * On-cluster etcd with TLS, [RBAC](https://kubernetes.io/docs/admin/authorization/rbac/)-enabled, [network policy](https://kubernetes.io/docs/concepts/services-networking/network-policies/)
 * Advanced features like [worker pools](https://typhoon.psdn.io/advanced/worker-pools/), [low-priority](https://typhoon.psdn.io/flatcar-linux/azure/#low-priority) workers, and [snippets](https://typhoon.psdn.io/advanced/customization/#hosts) customization
--- a/azure/flatcar-linux/kubernetes/bootstrap.tf
+++ b/azure/flatcar-linux/kubernetes/bootstrap.tf
@ -1,6 +1,6 @@
 # Kubernetes assets (kubeconfig, manifests)
 module "bootstrap" {
-  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=f45deec67e2fea4f06b5a3edad628b0fe0e9ec60"
+  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=26bea83b957d18b99e16435405983181c4a6e159"

  cluster_name = var.cluster_name
  api_servers  = [format("%s.%s", var.cluster_name, var.dns_zone)]
--- a/azure/flatcar-linux/kubernetes/cl/controller.yaml
+++ b/azure/flatcar-linux/kubernetes/cl/controller.yaml
@ -55,7 +55,7 @@ systemd:
        After=docker.service
        Wants=rpc-statd.service
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        ExecStartPre=/bin/mkdir -p /etc/cni/net.d
        ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
        ExecStartPre=/bin/mkdir -p /opt/cni/bin
@ -117,7 +117,7 @@ systemd:
        Type=oneshot
        RemainAfterExit=true
        WorkingDirectory=/opt/bootstrap
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        ExecStart=/usr/bin/docker run \
            -v /etc/kubernetes/pki:/etc/kubernetes/pki:ro \
            -v /opt/bootstrap/assets:/assets:ro \
--- a/azure/flatcar-linux/kubernetes/workers/cl/worker.yaml
+++ b/azure/flatcar-linux/kubernetes/workers/cl/worker.yaml
@ -27,7 +27,7 @@ systemd:
        After=docker.service
        Wants=rpc-statd.service
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        ExecStartPre=/bin/mkdir -p /etc/cni/net.d
        ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
        ExecStartPre=/bin/mkdir -p /opt/cni/bin
@ -92,7 +92,7 @@ systemd:
        [Unit]
        Description=Delete Kubernetes node on shutdown
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        Type=oneshot
        RemainAfterExit=true
        ExecStart=/bin/true
--- a/bare-metal/fedora-coreos/kubernetes/README.md
+++ b/bare-metal/fedora-coreos/kubernetes/README.md
@ -11,7 +11,7 @@ Typhoon distributes upstream Kubernetes, architectural conventions, and cluster

 ## Features <a href="https://www.cncf.io/certification/software-conformance/"><img align="right" src="https://storage.googleapis.com/poseidon/certified-kubernetes.png"></a>

-* Kubernetes v1.23.2 (upstream)
+* Kubernetes v1.23.3 (upstream)
 * Single or multi-master, [Calico](https://www.projectcalico.org/) or [Cilium](https://github.com/cilium/cilium) or [flannel](https://github.com/coreos/flannel) networking
 * On-cluster etcd with TLS, [RBAC](https://kubernetes.io/docs/admin/authorization/rbac/)-enabled, [network policy](https://kubernetes.io/docs/concepts/services-networking/network-policies/), SELinux enforcing
 * Advanced features like [snippets](https://typhoon.psdn.io/advanced/customization/#hosts) customization
--- a/bare-metal/fedora-coreos/kubernetes/bootstrap.tf
+++ b/bare-metal/fedora-coreos/kubernetes/bootstrap.tf
@ -1,6 +1,6 @@
 # Kubernetes assets (kubeconfig, manifests)
 module "bootstrap" {
-  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=f45deec67e2fea4f06b5a3edad628b0fe0e9ec60"
+  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=26bea83b957d18b99e16435405983181c4a6e159"

  cluster_name                    = var.cluster_name
  api_servers                     = [var.k8s_domain_name]
--- a/bare-metal/fedora-coreos/kubernetes/fcc/controller.yaml
+++ b/bare-metal/fedora-coreos/kubernetes/fcc/controller.yaml
@ -52,7 +52,7 @@ systemd:
        Description=Kubelet (System Container)
        Wants=rpc-statd.service
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        ExecStartPre=/bin/mkdir -p /etc/cni/net.d
        ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
        ExecStartPre=/bin/mkdir -p /opt/cni/bin
@ -123,7 +123,7 @@ systemd:
        Type=oneshot
        RemainAfterExit=true
        WorkingDirectory=/opt/bootstrap
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        ExecStartPre=-/usr/bin/podman rm bootstrap
        ExecStart=/usr/bin/podman run --name bootstrap \
            --network host \
--- a/bare-metal/fedora-coreos/kubernetes/fcc/worker.yaml
+++ b/bare-metal/fedora-coreos/kubernetes/fcc/worker.yaml
@ -25,7 +25,7 @@ systemd:
        Description=Kubelet (System Container)
        Wants=rpc-statd.service
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        ExecStartPre=/bin/mkdir -p /etc/cni/net.d
        ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
        ExecStartPre=/bin/mkdir -p /opt/cni/bin
--- a/bare-metal/flatcar-linux/kubernetes/README.md
+++ b/bare-metal/flatcar-linux/kubernetes/README.md
@ -11,7 +11,7 @@ Typhoon distributes upstream Kubernetes, architectural conventions, and cluster

 ## Features <a href="https://www.cncf.io/certification/software-conformance/"><img align="right" src="https://storage.googleapis.com/poseidon/certified-kubernetes.png"></a>

-* Kubernetes v1.23.2 (upstream)
+* Kubernetes v1.23.3 (upstream)
 * Single or multi-master, [Calico](https://www.projectcalico.org/) or [Cilium](https://github.com/cilium/cilium) or [flannel](https://github.com/coreos/flannel) networking
 * On-cluster etcd with TLS, [RBAC](https://kubernetes.io/docs/admin/authorization/rbac/)-enabled, [network policy](https://kubernetes.io/docs/concepts/services-networking/network-policies/)
 * Advanced features like [snippets](https://typhoon.psdn.io/advanced/customization/#hosts) customization
--- a/bare-metal/flatcar-linux/kubernetes/bootstrap.tf
+++ b/bare-metal/flatcar-linux/kubernetes/bootstrap.tf
@ -1,6 +1,6 @@
 # Kubernetes assets (kubeconfig, manifests)
 module "bootstrap" {
-  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=f45deec67e2fea4f06b5a3edad628b0fe0e9ec60"
+  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=26bea83b957d18b99e16435405983181c4a6e159"

  cluster_name                    = var.cluster_name
  api_servers                     = [var.k8s_domain_name]
--- a/bare-metal/flatcar-linux/kubernetes/cl/controller.yaml
+++ b/bare-metal/flatcar-linux/kubernetes/cl/controller.yaml
@ -63,7 +63,7 @@ systemd:
        After=docker.service
        Wants=rpc-statd.service
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        ExecStartPre=/bin/mkdir -p /etc/cni/net.d
        ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
        ExecStartPre=/bin/mkdir -p /opt/cni/bin
@ -126,7 +126,7 @@ systemd:
        Type=oneshot
        RemainAfterExit=true
        WorkingDirectory=/opt/bootstrap
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        ExecStart=/usr/bin/docker run \
            -v /etc/kubernetes/pki:/etc/kubernetes/pki:ro \
            -v /opt/bootstrap/assets:/assets:ro \
--- a/bare-metal/flatcar-linux/kubernetes/cl/worker.yaml
+++ b/bare-metal/flatcar-linux/kubernetes/cl/worker.yaml
@ -35,7 +35,7 @@ systemd:
        After=docker.service
        Wants=rpc-statd.service
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        ExecStartPre=/bin/mkdir -p /etc/cni/net.d
        ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
        ExecStartPre=/bin/mkdir -p /opt/cni/bin
--- a/digital-ocean/fedora-coreos/kubernetes/README.md
+++ b/digital-ocean/fedora-coreos/kubernetes/README.md
@ -11,7 +11,7 @@ Typhoon distributes upstream Kubernetes, architectural conventions, and cluster

 ## Features <a href="https://www.cncf.io/certification/software-conformance/"><img align="right" src="https://storage.googleapis.com/poseidon/certified-kubernetes.png"></a>

-* Kubernetes v1.23.2 (upstream)
+* Kubernetes v1.23.3 (upstream)
 * Single or multi-master, [Calico](https://www.projectcalico.org/) or [flannel](https://github.com/coreos/flannel) networking
 * On-cluster etcd with TLS, [RBAC](https://kubernetes.io/docs/admin/authorization/rbac/)-enabled, [network policy](https://kubernetes.io/docs/concepts/services-networking/network-policies/), SELinux enforcing
 * Advanced features like [snippets](https://typhoon.psdn.io/advanced/customization/#hosts) customization
--- a/digital-ocean/fedora-coreos/kubernetes/bootstrap.tf
+++ b/digital-ocean/fedora-coreos/kubernetes/bootstrap.tf
@ -1,6 +1,6 @@
 # Kubernetes assets (kubeconfig, manifests)
 module "bootstrap" {
-  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=f45deec67e2fea4f06b5a3edad628b0fe0e9ec60"
+  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=26bea83b957d18b99e16435405983181c4a6e159"

  cluster_name = var.cluster_name
  api_servers  = [format("%s.%s", var.cluster_name, var.dns_zone)]
--- a/digital-ocean/fedora-coreos/kubernetes/fcc/controller.yaml
+++ b/digital-ocean/fedora-coreos/kubernetes/fcc/controller.yaml
@ -54,7 +54,7 @@ systemd:
        After=afterburn.service
        Wants=rpc-statd.service
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        EnvironmentFile=/run/metadata/afterburn
        ExecStartPre=/bin/mkdir -p /etc/cni/net.d
        ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
@ -133,7 +133,7 @@ systemd:
            --volume /opt/bootstrap/assets:/assets:ro,Z \
            --volume /opt/bootstrap/apply:/apply:ro,Z \
            --entrypoint=/apply \
-            quay.io/poseidon/kubelet:v1.23.2
+            quay.io/poseidon/kubelet:v1.23.3
        ExecStartPost=/bin/touch /opt/bootstrap/bootstrap.done
        ExecStartPost=-/usr/bin/podman stop bootstrap
 storage:
--- a/digital-ocean/fedora-coreos/kubernetes/fcc/worker.yaml
+++ b/digital-ocean/fedora-coreos/kubernetes/fcc/worker.yaml
@ -28,7 +28,7 @@ systemd:
        After=afterburn.service
        Wants=rpc-statd.service
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        EnvironmentFile=/run/metadata/afterburn
        ExecStartPre=/bin/mkdir -p /etc/cni/net.d
        ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
@ -96,7 +96,7 @@ systemd:
        [Unit]
        Description=Delete Kubernetes node on shutdown
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        Type=oneshot
        RemainAfterExit=true
        ExecStart=/bin/true
--- a/digital-ocean/flatcar-linux/kubernetes/README.md
+++ b/digital-ocean/flatcar-linux/kubernetes/README.md
@ -11,7 +11,7 @@ Typhoon distributes upstream Kubernetes, architectural conventions, and cluster

 ## Features <a href="https://www.cncf.io/certification/software-conformance/"><img align="right" src="https://storage.googleapis.com/poseidon/certified-kubernetes.png"></a>

-* Kubernetes v1.23.2 (upstream)
+* Kubernetes v1.23.3 (upstream)
 * Single or multi-master, [Calico](https://www.projectcalico.org/) or [Cilium](https://github.com/cilium/cilium) or [flannel](https://github.com/coreos/flannel) networking
 * On-cluster etcd with TLS, [RBAC](https://kubernetes.io/docs/admin/authorization/rbac/)-enabled, [network policy](https://kubernetes.io/docs/concepts/services-networking/network-policies/)
 * Advanced features like [snippets](https://typhoon.psdn.io/advanced/customization/#hosts) customization
--- a/digital-ocean/flatcar-linux/kubernetes/bootstrap.tf
+++ b/digital-ocean/flatcar-linux/kubernetes/bootstrap.tf
@ -1,6 +1,6 @@
 # Kubernetes assets (kubeconfig, manifests)
 module "bootstrap" {
-  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=f45deec67e2fea4f06b5a3edad628b0fe0e9ec60"
+  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=26bea83b957d18b99e16435405983181c4a6e159"

  cluster_name = var.cluster_name
  api_servers  = [format("%s.%s", var.cluster_name, var.dns_zone)]
--- a/digital-ocean/flatcar-linux/kubernetes/cl/controller.yaml
+++ b/digital-ocean/flatcar-linux/kubernetes/cl/controller.yaml
@ -65,7 +65,7 @@ systemd:
        After=coreos-metadata.service
        Wants=rpc-statd.service
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        EnvironmentFile=/run/metadata/coreos
        ExecStartPre=/bin/mkdir -p /etc/cni/net.d
        ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
@ -129,7 +129,7 @@ systemd:
        Type=oneshot
        RemainAfterExit=true
        WorkingDirectory=/opt/bootstrap
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        ExecStart=/usr/bin/docker run \
            -v /etc/kubernetes/pki:/etc/kubernetes/pki:ro \
            -v /opt/bootstrap/assets:/assets:ro \
--- a/digital-ocean/flatcar-linux/kubernetes/cl/worker.yaml
+++ b/digital-ocean/flatcar-linux/kubernetes/cl/worker.yaml
@ -37,7 +37,7 @@ systemd:
        After=coreos-metadata.service
        Wants=rpc-statd.service
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        EnvironmentFile=/run/metadata/coreos
        ExecStartPre=/bin/mkdir -p /etc/cni/net.d
        ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
@ -98,7 +98,7 @@ systemd:
        [Unit]
        Description=Delete Kubernetes node on shutdown
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        Type=oneshot
        RemainAfterExit=true
        ExecStart=/bin/true
--- a/docs/advanced/arm64.md
+++ b/docs/advanced/arm64.md
@ -13,7 +13,7 @@ Create a cluster with ARM64 controller and worker nodes. Container workloads mus

    ```tf
    module "gravitas" {
-      source = "git::https://github.com/poseidon/typhoon//aws/fedora-coreos/kubernetes?ref=v1.23.2"
+      source = "git::https://github.com/poseidon/typhoon//aws/fedora-coreos/kubernetes?ref=v1.23.3"

      # AWS
      cluster_name = "gravitas"
@ -38,7 +38,7 @@ Create a cluster with ARM64 controller and worker nodes. Container workloads mus

    ```tf
    module "gravitas" {
-      source = "git::https://github.com/poseidon/typhoon//aws/flatcar-linux/kubernetes?ref=v1.23.2"
+      source = "git::https://github.com/poseidon/typhoon//aws/flatcar-linux/kubernetes?ref=v1.23.3"

      # AWS
      cluster_name = "gravitas"
@ -64,9 +64,9 @@ Verify the cluster has only arm64 (`aarch64`) nodes. For Flatcar Linux, describe
 ```
 $ kubectl get nodes -o wide
 NAME             STATUS   ROLES    AGE   VERSION   INTERNAL-IP   EXTERNAL-IP   OS-IMAGE                        KERNEL-VERSION            CONTAINER-RUNTIME
-ip-10-0-21-119   Ready    <none>   77s   v1.23.2   10.0.21.119   <none>        Fedora CoreOS 35.20211215.3.0   5.15.7-200.fc35.aarch64   containerd://1.5.8
-ip-10-0-32-166   Ready    <none>   80s   v1.23.2   10.0.32.166   <none>        Fedora CoreOS 35.20211215.3.0   5.15.7-200.fc35.aarch64   containerd://1.5.8
-ip-10-0-5-79     Ready    <none>   77s   v1.23.2   10.0.5.79     <none>        Fedora CoreOS 35.20211215.3.0   5.15.7-200.fc35.aarch64   containerd://1.5.8
+ip-10-0-21-119   Ready    <none>   77s   v1.23.3   10.0.21.119   <none>        Fedora CoreOS 35.20211215.3.0   5.15.7-200.fc35.aarch64   containerd://1.5.8
+ip-10-0-32-166   Ready    <none>   80s   v1.23.3   10.0.32.166   <none>        Fedora CoreOS 35.20211215.3.0   5.15.7-200.fc35.aarch64   containerd://1.5.8
+ip-10-0-5-79     Ready    <none>   77s   v1.23.3   10.0.5.79     <none>        Fedora CoreOS 35.20211215.3.0   5.15.7-200.fc35.aarch64   containerd://1.5.8
 ```

 ## Hybrid
@ -77,7 +77,7 @@ Create a hybrid/mixed arch cluster by defining an AWS cluster. Then define a [wo

    ```tf
    module "gravitas" {
-      source = "git::https://github.com/poseidon/typhoon//aws/fedora-coreos/kubernetes?ref=v1.23.2"
+      source = "git::https://github.com/poseidon/typhoon//aws/fedora-coreos/kubernetes?ref=v1.23.3"

      # AWS
      cluster_name = "gravitas"
@ -100,7 +100,7 @@ Create a hybrid/mixed arch cluster by defining an AWS cluster. Then define a [wo

    ```tf
    module "gravitas" {
-      source = "git::https://github.com/poseidon/typhoon//aws/flatcar-linux/kubernetes?ref=v1.23.2"
+      source = "git::https://github.com/poseidon/typhoon//aws/flatcar-linux/kubernetes?ref=v1.23.3"

      # AWS
      cluster_name = "gravitas"
@ -123,7 +123,7 @@ Create a hybrid/mixed arch cluster by defining an AWS cluster. Then define a [wo

    ```tf
    module "gravitas-arm64" {
-      source = "git::https://github.com/poseidon/typhoon//aws/fedora-coreos/kubernetes/workers?ref=v1.23.2"
+      source = "git::https://github.com/poseidon/typhoon//aws/fedora-coreos/kubernetes/workers?ref=v1.23.3"

      # AWS
      vpc_id          = module.gravitas.vpc_id
@ -147,7 +147,7 @@ Create a hybrid/mixed arch cluster by defining an AWS cluster. Then define a [wo

    ```tf
    module "gravitas-arm64" {
-      source = "git::https://github.com/poseidon/typhoon//aws/flatcar-linux/kubernetes/workers?ref=v1.23.2"
+      source = "git::https://github.com/poseidon/typhoon//aws/flatcar-linux/kubernetes/workers?ref=v1.23.3"

      # AWS
      vpc_id          = module.gravitas.vpc_id
@ -172,9 +172,9 @@ Verify amd64 (x86_64) and arm64 (aarch64) nodes are present.
 ```
 $ kubectl get nodes -o wide
 NAME                       STATUS   ROLES    AGE    VERSION   INTERNAL-IP   EXTERNAL-IP   OS-IMAGE                                             KERNEL-VERSION            CONTAINER-RUNTIME
-ip-10-0-1-73               Ready    <none>   111m   v1.23.2   10.0.1.73     <none>        Fedora CoreOS 35.20211215.3.0                        5.15.7-200.fc35.x86_64    containerd://1.5.8
-ip-10-0-22-79...           Ready    <none>   111m   v1.23.2   10.0.22.79    <none>        Flatcar Container Linux by Kinvolk 3033.2.0 (Oklo)   5.10.84-flatcar           containerd://1.5.8
-ip-10-0-24-130             Ready    <none>   111m   v1.23.2   10.0.24.130   <none>        Fedora CoreOS 35.20211215.3.0                        5.15.7-200.fc35.x86_64    containerd://1.5.8
-ip-10-0-39-19              Ready    <none>   111m   v1.23.2   10.0.39.19    <none>        Fedora CoreOS 35.20211215.3.0                        5.15.7-200.fc35.x86_64    containerd://1.5.8
+ip-10-0-1-73               Ready    <none>   111m   v1.23.3   10.0.1.73     <none>        Fedora CoreOS 35.20211215.3.0                        5.15.7-200.fc35.x86_64    containerd://1.5.8
+ip-10-0-22-79...           Ready    <none>   111m   v1.23.3   10.0.22.79    <none>        Flatcar Container Linux by Kinvolk 3033.2.0 (Oklo)   5.10.84-flatcar           containerd://1.5.8
+ip-10-0-24-130             Ready    <none>   111m   v1.23.3   10.0.24.130   <none>        Fedora CoreOS 35.20211215.3.0                        5.15.7-200.fc35.x86_64    containerd://1.5.8
+ip-10-0-39-19              Ready    <none>   111m   v1.23.3   10.0.39.19    <none>        Fedora CoreOS 35.20211215.3.0                        5.15.7-200.fc35.x86_64    containerd://1.5.8
 ```

--- a/docs/advanced/nodes.md
+++ b/docs/advanced/nodes.md
@ -36,7 +36,7 @@ Add custom initial worker node labels to default workers or worker pool nodes to

    ```tf
    module "yavin" {
-      source = "git::https://github.com/poseidon/typhoon//google-cloud/fedora-coreos/kubernetes?ref=v1.23.2"
+      source = "git::https://github.com/poseidon/typhoon//google-cloud/fedora-coreos/kubernetes?ref=v1.23.3"

      # Google Cloud
      cluster_name  = "yavin"
@ -57,7 +57,7 @@ Add custom initial worker node labels to default workers or worker pool nodes to

    ```tf
    module "yavin-pool" {
-      source = "git::https://github.com/poseidon/typhoon//google-cloud/fedora-coreos/kubernetes/workers?ref=v1.23.2"
+      source = "git::https://github.com/poseidon/typhoon//google-cloud/fedora-coreos/kubernetes/workers?ref=v1.23.3"

      # Google Cloud
      cluster_name = "yavin"
@ -89,7 +89,7 @@ Add custom initial taints on worker pool nodes to indicate a node is unique and

    ```tf
    module "yavin" {
-      source = "git::https://github.com/poseidon/typhoon//google-cloud/fedora-coreos/kubernetes?ref=v1.23.2"
+      source = "git::https://github.com/poseidon/typhoon//google-cloud/fedora-coreos/kubernetes?ref=v1.23.3"

      # Google Cloud
      cluster_name  = "yavin"
@ -110,7 +110,7 @@ Add custom initial taints on worker pool nodes to indicate a node is unique and

    ```tf
    module "yavin-pool" {
-      source = "git::https://github.com/poseidon/typhoon//google-cloud/fedora-coreos/kubernetes/workers?ref=v1.23.2"
+      source = "git::https://github.com/poseidon/typhoon//google-cloud/fedora-coreos/kubernetes/workers?ref=v1.23.3"

      # Google Cloud
      cluster_name = "yavin"
--- a/docs/advanced/worker-pools.md
+++ b/docs/advanced/worker-pools.md
@ -19,7 +19,7 @@ Create a cluster following the AWS [tutorial](../flatcar-linux/aws.md#cluster).

    ```tf
    module "tempest-worker-pool" {
-      source = "git::https://github.com/poseidon/typhoon//aws/fedora-coreos/kubernetes/workers?ref=v1.23.2"
+      source = "git::https://github.com/poseidon/typhoon//aws/fedora-coreos/kubernetes/workers?ref=v1.23.3"

      # AWS
      vpc_id          = module.tempest.vpc_id
@ -42,7 +42,7 @@ Create a cluster following the AWS [tutorial](../flatcar-linux/aws.md#cluster).

    ```tf
    module "tempest-worker-pool" {
-      source = "git::https://github.com/poseidon/typhoon//aws/flatcar-linux/kubernetes/workers?ref=v1.23.2"
+      source = "git::https://github.com/poseidon/typhoon//aws/flatcar-linux/kubernetes/workers?ref=v1.23.3"

      # AWS
      vpc_id          = module.tempest.vpc_id
@ -111,7 +111,7 @@ Create a cluster following the Azure [tutorial](../flatcar-linux/azure.md#cluste

    ```tf
    module "ramius-worker-pool" {
-      source = "git::https://github.com/poseidon/typhoon//azure/fedora-coreos/kubernetes/workers?ref=v1.23.2"
+      source = "git::https://github.com/poseidon/typhoon//azure/fedora-coreos/kubernetes/workers?ref=v1.23.3"

      # Azure
      region                  = module.ramius.region
@ -137,7 +137,7 @@ Create a cluster following the Azure [tutorial](../flatcar-linux/azure.md#cluste

    ```tf
    module "ramius-worker-pool" {
-      source = "git::https://github.com/poseidon/typhoon//azure/flatcar-linux/kubernetes/workers?ref=v1.23.2"
+      source = "git::https://github.com/poseidon/typhoon//azure/flatcar-linux/kubernetes/workers?ref=v1.23.3"

      # Azure
      region                  = module.ramius.region
@ -207,7 +207,7 @@ Create a cluster following the Google Cloud [tutorial](../flatcar-linux/google-c

    ```tf
    module "yavin-worker-pool" {
-      source = "git::https://github.com/poseidon/typhoon//google-cloud/fedora-coreos/kubernetes/workers?ref=v1.23.2"
+      source = "git::https://github.com/poseidon/typhoon//google-cloud/fedora-coreos/kubernetes/workers?ref=v1.23.3"

      # Google Cloud
      region       = "europe-west2"
@ -231,7 +231,7 @@ Create a cluster following the Google Cloud [tutorial](../flatcar-linux/google-c

    ```tf
    module "yavin-worker-pool" {
-      source = "git::https://github.com/poseidon/typhoon//google-cloud/flatcar-linux/kubernetes/workers?ref=v1.23.2"
+      source = "git::https://github.com/poseidon/typhoon//google-cloud/flatcar-linux/kubernetes/workers?ref=v1.23.3"

      # Google Cloud
      region       = "europe-west2"
@ -246,7 +246,7 @@ Create a cluster following the Google Cloud [tutorial](../flatcar-linux/google-c
      # optional
      worker_count = 2
      machine_type = "n1-standard-16"
-      os_image     = "flatcar-linux-2303-4-0"    # custom
+      os_image     = "flatcar-stable"
      preemptible  = true
    }
    ```
@ -262,11 +262,11 @@ Verify a managed instance group of workers joins the cluster within a few minute
 ```
 $ kubectl get nodes
 NAME                                             STATUS   AGE    VERSION
-yavin-controller-0.c.example-com.internal        Ready    6m     v1.23.2
-yavin-worker-jrbf.c.example-com.internal         Ready    5m     v1.23.2
-yavin-worker-mzdm.c.example-com.internal         Ready    5m     v1.23.2
-yavin-16x-worker-jrbf.c.example-com.internal     Ready    3m     v1.23.2
-yavin-16x-worker-mzdm.c.example-com.internal     Ready    3m     v1.23.2
+yavin-controller-0.c.example-com.internal        Ready    6m     v1.23.3
+yavin-worker-jrbf.c.example-com.internal         Ready    5m     v1.23.3
+yavin-worker-mzdm.c.example-com.internal         Ready    5m     v1.23.3
+yavin-16x-worker-jrbf.c.example-com.internal     Ready    3m     v1.23.3
+yavin-16x-worker-mzdm.c.example-com.internal     Ready    3m     v1.23.3
 ```

 ### Variables
--- a/docs/architecture/operating-systems.md
+++ b/docs/architecture/operating-systems.md
@ -34,7 +34,7 @@ Together, they diversify Typhoon to support a range of container technologies.
 | single-master     | all platforms | all platforms |
 | multi-master      | all platforms | all platforms |
 | control plane     | static pods   | static pods   |
-| Container Runtime | docker 20.10  | docker 20.10  |
+| Container Runtime | containerd 1.5.8 | containerd 1.5.8 |
 | kubelet image     | kubelet [image](https://github.com/poseidon/kubelet) with upstream binary | kubelet [image](https://github.com/poseidon/kubelet) with upstream binary |
 | control plane images | upstream images | upstream images |
 | on-host etcd      | docker    | podman |
--- a/docs/fedora-coreos/aws.md
+++ b/docs/fedora-coreos/aws.md
@ -1,6 +1,6 @@
 # AWS

-In this tutorial, we'll create a Kubernetes v1.23.2 cluster on AWS with Fedora CoreOS.
+In this tutorial, we'll create a Kubernetes v1.23.3 cluster on AWS with Fedora CoreOS.

 We'll declare a Kubernetes cluster using the Typhoon Terraform module. Then apply the changes to create a VPC, gateway, subnets, security groups, controller instances, worker auto-scaling group, network load balancer, and TLS assets.

@ -72,7 +72,7 @@ Define a Kubernetes cluster using the module `aws/fedora-coreos/kubernetes`.

 ```tf
 module "tempest" {
-  source = "git::https://github.com/poseidon/typhoon//aws/fedora-coreos/kubernetes?ref=v1.23.2"
+  source = "git::https://github.com/poseidon/typhoon//aws/fedora-coreos/kubernetes?ref=v1.23.3"

  # AWS
  cluster_name = "tempest"
@ -145,9 +145,9 @@ List nodes in the cluster.
 $ export KUBECONFIG=/home/user/.kube/configs/tempest-config
 $ kubectl get nodes
 NAME           STATUS  ROLES    AGE  VERSION
-ip-10-0-3-155  Ready   <none>   10m  v1.23.2
-ip-10-0-26-65  Ready   <none>   10m  v1.23.2
-ip-10-0-41-21  Ready   <none>   10m  v1.23.2
+ip-10-0-3-155  Ready   <none>   10m  v1.23.3
+ip-10-0-26-65  Ready   <none>   10m  v1.23.3
+ip-10-0-41-21  Ready   <none>   10m  v1.23.3
 ```

 List the pods.
--- a/docs/fedora-coreos/azure.md
+++ b/docs/fedora-coreos/azure.md
@ -1,6 +1,6 @@
 # Azure

-In this tutorial, we'll create a Kubernetes v1.23.2 cluster on Azure with Fedora CoreOS.
+In this tutorial, we'll create a Kubernetes v1.23.3 cluster on Azure with Fedora CoreOS.

 We'll declare a Kubernetes cluster using the Typhoon Terraform module. Then apply the changes to create a resource group, virtual network, subnets, security groups, controller availability set, worker scale set, load balancer, and TLS assets.

@ -86,7 +86,7 @@ Define a Kubernetes cluster using the module `azure/fedora-coreos/kubernetes`.

 ```tf
 module "ramius" {
-  source = "git::https://github.com/poseidon/typhoon//azure/fedora-coreos/kubernetes?ref=v1.23.2"
+  source = "git::https://github.com/poseidon/typhoon//azure/fedora-coreos/kubernetes?ref=v1.23.3"

  # Azure
  cluster_name   = "ramius"
@ -161,9 +161,9 @@ List nodes in the cluster.
 $ export KUBECONFIG=/home/user/.kube/configs/ramius-config
 $ kubectl get nodes
 NAME                  STATUS  ROLES   AGE  VERSION
-ramius-controller-0   Ready   <none>  24m  v1.23.2
-ramius-worker-000001  Ready   <none>  25m  v1.23.2
-ramius-worker-000002  Ready   <none>  24m  v1.23.2
+ramius-controller-0   Ready   <none>  24m  v1.23.3
+ramius-worker-000001  Ready   <none>  25m  v1.23.3
+ramius-worker-000002  Ready   <none>  24m  v1.23.3
 ```

 List the pods.
--- a/docs/fedora-coreos/bare-metal.md
+++ b/docs/fedora-coreos/bare-metal.md
@ -1,6 +1,6 @@
 # Bare-Metal

-In this tutorial, we'll network boot and provision a Kubernetes v1.23.2 cluster on bare-metal with Fedora CoreOS.
+In this tutorial, we'll network boot and provision a Kubernetes v1.23.3 cluster on bare-metal with Fedora CoreOS.

 First, we'll deploy a [Matchbox](https://github.com/poseidon/matchbox) service and setup a network boot environment. Then, we'll declare a Kubernetes cluster using the Typhoon Terraform module and power on machines. On PXE boot, machines will install Fedora CoreOS to disk, reboot into the disk install, and provision themselves as Kubernetes controllers or workers via Ignition.

@ -154,7 +154,7 @@ Define a Kubernetes cluster using the module `bare-metal/fedora-coreos/kubernete

 ```tf
 module "mercury" {
-  source = "git::https://github.com/poseidon/typhoon//bare-metal/fedora-coreos/kubernetes?ref=v1.23.2"
+  source = "git::https://github.com/poseidon/typhoon//bare-metal/fedora-coreos/kubernetes?ref=v1.23.3"

  # bare-metal
  cluster_name            = "mercury"
@ -283,9 +283,9 @@ List nodes in the cluster.
 $ export KUBECONFIG=/home/user/.kube/configs/mercury-config
 $ kubectl get nodes
 NAME                STATUS  ROLES   AGE  VERSION
-node1.example.com   Ready   <none>  10m  v1.23.2
-node2.example.com   Ready   <none>  10m  v1.23.2
-node3.example.com   Ready   <none>  10m  v1.23.2
+node1.example.com   Ready   <none>  10m  v1.23.3
+node2.example.com   Ready   <none>  10m  v1.23.3
+node3.example.com   Ready   <none>  10m  v1.23.3
 ```

 List the pods.
--- a/docs/fedora-coreos/digitalocean.md
+++ b/docs/fedora-coreos/digitalocean.md
@ -1,6 +1,6 @@
 # DigitalOcean

-In this tutorial, we'll create a Kubernetes v1.23.2 cluster on DigitalOcean with Fedora CoreOS.
+In this tutorial, we'll create a Kubernetes v1.23.3 cluster on DigitalOcean with Fedora CoreOS.

 We'll declare a Kubernetes cluster using the Typhoon Terraform module. Then apply the changes to create controller droplets, worker droplets, DNS records, tags, and TLS assets.

@ -81,7 +81,7 @@ Define a Kubernetes cluster using the module `digital-ocean/fedora-coreos/kubern

 ```tf
 module "nemo" {
-  source = "git::https://github.com/poseidon/typhoon//digital-ocean/fedora-coreos/kubernetes?ref=v1.23.2"
+  source = "git::https://github.com/poseidon/typhoon//digital-ocean/fedora-coreos/kubernetes?ref=v1.23.3"

  # Digital Ocean
  cluster_name = "nemo"
@ -155,9 +155,9 @@ List nodes in the cluster.
 $ export KUBECONFIG=/home/user/.kube/configs/nemo-config
 $ kubectl get nodes
 NAME               STATUS  ROLES   AGE  VERSION
-10.132.110.130     Ready   <none>  10m  v1.23.2
-10.132.115.81      Ready   <none>  10m  v1.23.2
-10.132.124.107     Ready   <none>  10m  v1.23.2
+10.132.110.130     Ready   <none>  10m  v1.23.3
+10.132.115.81      Ready   <none>  10m  v1.23.3
+10.132.124.107     Ready   <none>  10m  v1.23.3
 ```

 List the pods.
--- a/docs/fedora-coreos/google-cloud.md
+++ b/docs/fedora-coreos/google-cloud.md
@ -1,6 +1,6 @@
 # Google Cloud

-In this tutorial, we'll create a Kubernetes v1.23.2 cluster on Google Compute Engine with Fedora CoreOS.
+In this tutorial, we'll create a Kubernetes v1.23.3 cluster on Google Compute Engine with Fedora CoreOS.

 We'll declare a Kubernetes cluster using the Typhoon Terraform module. Then apply the changes to create a network, firewall rules, health checks, controller instances, worker managed instance group, load balancers, and TLS assets.

@ -147,9 +147,9 @@ List nodes in the cluster.
 $ export KUBECONFIG=/home/user/.kube/configs/yavin-config
 $ kubectl get nodes
 NAME                                       ROLES    STATUS  AGE  VERSION
-yavin-controller-0.c.example-com.internal  <none>   Ready   6m   v1.23.2
-yavin-worker-jrbf.c.example-com.internal   <none>   Ready   5m   v1.23.2
-yavin-worker-mzdm.c.example-com.internal   <none>   Ready   5m   v1.23.2
+yavin-controller-0.c.example-com.internal  <none>   Ready   6m   v1.23.3
+yavin-worker-jrbf.c.example-com.internal   <none>   Ready   5m   v1.23.3
+yavin-worker-mzdm.c.example-com.internal   <none>   Ready   5m   v1.23.3
 ```

 List the pods.
--- a/docs/flatcar-linux/aws.md
+++ b/docs/flatcar-linux/aws.md
@ -1,6 +1,6 @@
 # AWS

-In this tutorial, we'll create a Kubernetes v1.23.2 cluster on AWS with Flatcar Linux.
+In this tutorial, we'll create a Kubernetes v1.23.3 cluster on AWS with Flatcar Linux.

 We'll declare a Kubernetes cluster using the Typhoon Terraform module. Then apply the changes to create a VPC, gateway, subnets, security groups, controller instances, worker auto-scaling group, network load balancer, and TLS assets.

@ -72,7 +72,7 @@ Define a Kubernetes cluster using the module `aws/flatcar-linux/kubernetes`.

 ```tf
 module "tempest" {
-  source = "git::https://github.com/poseidon/typhoon//aws/flatcar-linux/kubernetes?ref=v1.23.2"
+  source = "git::https://github.com/poseidon/typhoon//aws/flatcar-linux/kubernetes?ref=v1.23.3"

  # AWS
  cluster_name = "tempest"
@ -145,9 +145,9 @@ List nodes in the cluster.
 $ export KUBECONFIG=/home/user/.kube/configs/tempest-config
 $ kubectl get nodes
 NAME           STATUS  ROLES   AGE  VERSION
-ip-10-0-3-155  Ready   <none>  10m  v1.23.2
-ip-10-0-26-65  Ready   <none>  10m  v1.23.2
-ip-10-0-41-21  Ready   <none>  10m  v1.23.2
+ip-10-0-3-155  Ready   <none>  10m  v1.23.3
+ip-10-0-26-65  Ready   <none>  10m  v1.23.3
+ip-10-0-41-21  Ready   <none>  10m  v1.23.3
 ```

 List the pods.
--- a/docs/flatcar-linux/azure.md
+++ b/docs/flatcar-linux/azure.md
@ -1,6 +1,6 @@
 # Azure

-In this tutorial, we'll create a Kubernetes v1.23.2 cluster on Azure with Flatcar Linux.
+In this tutorial, we'll create a Kubernetes v1.23.3 cluster on Azure with Flatcar Linux.

 We'll declare a Kubernetes cluster using the Typhoon Terraform module. Then apply the changes to create a resource group, virtual network, subnets, security groups, controller availability set, worker scale set, load balancer, and TLS assets.

@ -75,7 +75,7 @@ Define a Kubernetes cluster using the module `azure/flatcar-linux/kubernetes`.

 ```tf
 module "ramius" {
-  source = "git::https://github.com/poseidon/typhoon//azure/flatcar-linux/kubernetes?ref=v1.23.2"
+  source = "git::https://github.com/poseidon/typhoon//azure/flatcar-linux/kubernetes?ref=v1.23.3"

  # Azure
  cluster_name   = "ramius"
@ -149,9 +149,9 @@ List nodes in the cluster.
 $ export KUBECONFIG=/home/user/.kube/configs/ramius-config
 $ kubectl get nodes
 NAME                  STATUS  ROLES   AGE  VERSION
-ramius-controller-0   Ready   <none>  24m  v1.23.2
-ramius-worker-000001  Ready   <none>  25m  v1.23.2
-ramius-worker-000002  Ready   <none>  24m  v1.23.2
+ramius-controller-0   Ready   <none>  24m  v1.23.3
+ramius-worker-000001  Ready   <none>  25m  v1.23.3
+ramius-worker-000002  Ready   <none>  24m  v1.23.3
 ```

 List the pods.
--- a/docs/flatcar-linux/bare-metal.md
+++ b/docs/flatcar-linux/bare-metal.md
@ -1,6 +1,6 @@
 # Bare-Metal

-In this tutorial, we'll network boot and provision a Kubernetes v1.23.2 cluster on bare-metal with Flatcar Linux.
+In this tutorial, we'll network boot and provision a Kubernetes v1.23.3 cluster on bare-metal with Flatcar Linux.

 First, we'll deploy a [Matchbox](https://github.com/poseidon/matchbox) service and setup a network boot environment. Then, we'll declare a Kubernetes cluster using the Typhoon Terraform module and power on machines. On PXE boot, machines will install Container Linux to disk, reboot into the disk install, and provision themselves as Kubernetes controllers or workers via Ignition.

@ -154,7 +154,7 @@ Define a Kubernetes cluster using the module `bare-metal/flatcar-linux/kubernete

 ```tf
 module "mercury" {
-  source = "git::https://github.com/poseidon/typhoon//bare-metal/flatcar-linux/kubernetes?ref=v1.23.2"
+  source = "git::https://github.com/poseidon/typhoon//bare-metal/flatcar-linux/kubernetes?ref=v1.23.3"

  # bare-metal
  cluster_name            = "mercury"
@ -293,9 +293,9 @@ List nodes in the cluster.
 $ export KUBECONFIG=/home/user/.kube/configs/mercury-config
 $ kubectl get nodes
 NAME                STATUS  ROLES   AGE  VERSION
-node1.example.com   Ready   <none>  10m  v1.23.2
-node2.example.com   Ready   <none>  10m  v1.23.2
-node3.example.com   Ready   <none>  10m  v1.23.2
+node1.example.com   Ready   <none>  10m  v1.23.3
+node2.example.com   Ready   <none>  10m  v1.23.3
+node3.example.com   Ready   <none>  10m  v1.23.3
 ```

 List the pods.
--- a/docs/flatcar-linux/digitalocean.md
+++ b/docs/flatcar-linux/digitalocean.md
@ -1,6 +1,6 @@
 # DigitalOcean

-In this tutorial, we'll create a Kubernetes v1.23.2 cluster on DigitalOcean with Flatcar Linux.
+In this tutorial, we'll create a Kubernetes v1.23.3 cluster on DigitalOcean with Flatcar Linux.

 We'll declare a Kubernetes cluster using the Typhoon Terraform module. Then apply the changes to create controller droplets, worker droplets, DNS records, tags, and TLS assets.

@ -81,7 +81,7 @@ Define a Kubernetes cluster using the module `digital-ocean/flatcar-linux/kubern

 ```tf
 module "nemo" {
-  source = "git::https://github.com/poseidon/typhoon//digital-ocean/flatcar-linux/kubernetes?ref=v1.23.2"
+  source = "git::https://github.com/poseidon/typhoon//digital-ocean/flatcar-linux/kubernetes?ref=v1.23.3"

  # Digital Ocean
  cluster_name = "nemo"
@ -155,9 +155,9 @@ List nodes in the cluster.
 $ export KUBECONFIG=/home/user/.kube/configs/nemo-config
 $ kubectl get nodes
 NAME               STATUS  ROLES   AGE  VERSION
-10.132.110.130     Ready   <none>  10m  v1.23.2
-10.132.115.81      Ready   <none>  10m  v1.23.2
-10.132.124.107     Ready   <none>  10m  v1.23.2
+10.132.110.130     Ready   <none>  10m  v1.23.3
+10.132.115.81      Ready   <none>  10m  v1.23.3
+10.132.124.107     Ready   <none>  10m  v1.23.3
 ```

 List the pods.
--- a/docs/flatcar-linux/google-cloud.md
+++ b/docs/flatcar-linux/google-cloud.md
@ -1,6 +1,6 @@
 # Google Cloud

-In this tutorial, we'll create a Kubernetes v1.23.2 cluster on Google Compute Engine with Flatcar Linux.
+In this tutorial, we'll create a Kubernetes v1.23.3 cluster on Google Compute Engine with Flatcar Linux.

 We'll declare a Kubernetes cluster using the Typhoon Terraform module. Then apply the changes to create a network, firewall rules, health checks, controller instances, worker managed instance group, load balancers, and TLS assets.

@ -67,32 +67,13 @@ Additional configuration options are described in the `google` provider [docs](h
 !!! tip
    Regions are listed in [docs](https://cloud.google.com/compute/docs/regions-zones/regions-zones) or with `gcloud compute regions list`. A project may contain multiple clusters across different regions.

-### Flatcar Linux Images
-
-Flatcar Linux publishes Google Cloud images, but does not yet upload them. Google Cloud allows [custom boot images](https://cloud.google.com/compute/docs/images/import-existing-image) to be uploaded to a bucket and imported into your project.
-
-[Download](https://www.flatcar-linux.org/releases/) the Flatcar Linux GCE gzipped tarball and upload it to a Google Cloud storage bucket.
-
-```
-gsutil list
-gsutil cp flatcar_production_gce.tar.gz gs://BUCKET
-```
-
-Create a Compute Engine image from the file.
-
-```
-gcloud compute images create flatcar-linux-2303-4-0 --source-uri gs://BUCKET_NAME/flatcar_production_gce.tar.gz
-```
-
-Set the [os_image](#variables) in the next step.
-
 ## Cluster

 Define a Kubernetes cluster using the module `google-cloud/flatcar-linux/kubernetes`.

 ```tf
 module "yavin" {
-  source = "git::https://github.com/poseidon/typhoon//google-cloud/flatcar-linux/kubernetes?ref=v1.23.2"
+  source = "git::https://github.com/poseidon/typhoon//google-cloud/flatcar-linux/kubernetes?ref=v1.23.3"

  # Google Cloud
  cluster_name  = "yavin"
@ -101,7 +82,6 @@ module "yavin" {
  dns_zone_name = "example-zone"

  # configuration
-  os_image           = "flatcar-linux-2303-4-0"
  ssh_authorized_key = "ssh-rsa AAAAB3Nz..."

  # optional
@ -167,9 +147,9 @@ List nodes in the cluster.
 $ export KUBECONFIG=/home/user/.kube/configs/yavin-config
 $ kubectl get nodes
 NAME                                       ROLES    STATUS  AGE  VERSION
-yavin-controller-0.c.example-com.internal  <none>   Ready   6m   v1.23.2
-yavin-worker-jrbf.c.example-com.internal   <none>   Ready   5m   v1.23.2
-yavin-worker-mzdm.c.example-com.internal   <none>   Ready   5m   v1.23.2
+yavin-controller-0.c.example-com.internal  <none>   Ready   6m   v1.23.3
+yavin-worker-jrbf.c.example-com.internal   <none>   Ready   5m   v1.23.3
+yavin-worker-mzdm.c.example-com.internal   <none>   Ready   5m   v1.23.3
 ```

 List the pods.
@ -206,7 +186,6 @@ Check the [variables.tf](https://github.com/poseidon/typhoon/blob/master/google-
 | region | Google Cloud region | "us-central1" |
 | dns_zone | Google Cloud DNS zone | "google-cloud.example.com" |
 | dns_zone_name | Google Cloud DNS zone name | "example-zone" |
-| os_image | Container Linux image for compute instances | "flatcar-linux-2303-4-0" |
 | ssh_authorized_key | SSH public key for user 'core' | "ssh-rsa AAAAB3NZ..." |

 Check the list of valid [regions](https://cloud.google.com/compute/docs/regions-zones/regions-zones) and list Container Linux [images](https://cloud.google.com/compute/docs/images) with `gcloud compute images list | grep coreos`.
@ -236,6 +215,7 @@ resource "google_dns_managed_zone" "zone-for-clusters" {
 | worker_count | Number of workers | 1 | 3 |
 | controller_type | Machine type for controllers | "n1-standard-1" | See below |
 | worker_type | Machine type for workers | "n1-standard-1" | See below |
+| os_image | Flatcar Linux image for compute instances | "flatcar-stable" | flatcar-stable, flatcar-beta, flatcar-alpha |
 | disk_size | Size of the disk in GB | 30 | 100 |
 | worker_preemptible | If enabled, Compute Engine will terminate workers randomly within 24 hours | false | true |
 | controller_snippets | Controller Container Linux Config snippets | [] | [example](/advanced/customization/) |
--- a/docs/index.md
+++ b/docs/index.md
@ -11,7 +11,7 @@ Typhoon distributes upstream Kubernetes, architectural conventions, and cluster

 ## Features <a href="https://www.cncf.io/certification/software-conformance/"><img align="right" src="https://storage.googleapis.com/poseidon/certified-kubernetes.png"></a>

-* Kubernetes v1.23.2 (upstream)
+* Kubernetes v1.23.3 (upstream)
 * Single or multi-master, [Calico](https://www.projectcalico.org/) or [Cilium](https://github.com/cilium/cilium) or [flannel](https://github.com/coreos/flannel) networking
 * On-cluster etcd with TLS, [RBAC](https://kubernetes.io/docs/admin/authorization/rbac/)-enabled, [network policy](https://kubernetes.io/docs/concepts/services-networking/network-policies/), SELinux enforcing
 * Advanced features like [worker pools](advanced/worker-pools/), [preemptible](fedora-coreos/google-cloud/#preemption) workers, and [snippets](advanced/customization/#hosts) customization
@ -43,7 +43,7 @@ Typhoon is available for [Flatcar Linux](https://www.flatcar-linux.org/releases/
 | Azure         | Flatcar Linux    | [azure/flatcar-linux/kubernetes](flatcar-linux/azure.md) | alpha |
 | Bare-Metal    | Flatcar Linux    | [bare-metal/flatcar-linux/kubernetes](flatcar-linux/bare-metal.md) | stable |
 | DigitalOcean | Flatcar Linux  | [digital-ocean/flatcar-linux/kubernetes](flatcar-linux/digitalocean.md) | beta |
-| Google Cloud  | Flatcar Linux  | [google-cloud/flatcar-linux/kubernetes](flatcar-linux/google-cloud.md) | beta |
+| Google Cloud  | Flatcar Linux  | [google-cloud/flatcar-linux/kubernetes](flatcar-linux/google-cloud.md) | stable |

 | Platform      | Operating System | Terraform Module | Status |
 |---------------|------------------|------------------|--------|
@ -61,7 +61,7 @@ Define a Kubernetes cluster by using the Terraform module for your chosen platfo

 ```tf
 module "yavin" {
-  source = "git::https://github.com/poseidon/typhoon//google-cloud/fedora-coreos/kubernetes?ref=v1.23.2"
+  source = "git::https://github.com/poseidon/typhoon//google-cloud/fedora-coreos/kubernetes?ref=v1.23.3"

  # Google Cloud
  cluster_name  = "yavin"
@ -99,9 +99,9 @@ In 4-8 minutes (varies by platform), the cluster will be ready. This Google Clou
 $ export KUBECONFIG=/home/user/.kube/configs/yavin-config
 $ kubectl get nodes
 NAME                                       ROLES    STATUS  AGE  VERSION
-yavin-controller-0.c.example-com.internal  <none>   Ready   6m   v1.23.2
-yavin-worker-jrbf.c.example-com.internal   <none>   Ready   5m   v1.23.2
-yavin-worker-mzdm.c.example-com.internal   <none>   Ready   5m   v1.23.2
+yavin-controller-0.c.example-com.internal  <none>   Ready   6m   v1.23.3
+yavin-worker-jrbf.c.example-com.internal   <none>   Ready   5m   v1.23.3
+yavin-worker-mzdm.c.example-com.internal   <none>   Ready   5m   v1.23.3
 ```

 List the pods.
--- a/docs/topics/maintenance.md
+++ b/docs/topics/maintenance.md
@ -13,12 +13,12 @@ Typhoon provides tagged releases to allow clusters to be versioned using ordinar

 ```
 module "yavin" {
-  source = "git::https://github.com/poseidon/typhoon//google-cloud/fedora-coreos/kubernetes?ref=v1.23.2"
+  source = "git::https://github.com/poseidon/typhoon//google-cloud/fedora-coreos/kubernetes?ref=v1.23.3"
  ...
 }

 module "mercury" {
-  source = "git::https://github.com/poseidon/typhoon//bare-metal/flatcar-linux/kubernetes?ref=v1.23.2"
+  source = "git::https://github.com/poseidon/typhoon//bare-metal/flatcar-linux/kubernetes?ref=v1.23.3"
  ...
 }
 ```
--- a/google-cloud/fedora-coreos/kubernetes/README.md
+++ b/google-cloud/fedora-coreos/kubernetes/README.md
@ -11,7 +11,7 @@ Typhoon distributes upstream Kubernetes, architectural conventions, and cluster

 ## Features <a href="https://www.cncf.io/certification/software-conformance/"><img align="right" src="https://storage.googleapis.com/poseidon/certified-kubernetes.png"></a>

-* Kubernetes v1.23.2 (upstream)
+* Kubernetes v1.23.3 (upstream)
 * Single or multi-master, [Calico](https://www.projectcalico.org/) or [Cilium](https://github.com/cilium/cilium) or [flannel](https://github.com/coreos/flannel) networking
 * On-cluster etcd with TLS, [RBAC](https://kubernetes.io/docs/admin/authorization/rbac/)-enabled, [network policy](https://kubernetes.io/docs/concepts/services-networking/network-policies/), SELinux enforcing
 * Advanced features like [worker pools](https://typhoon.psdn.io/advanced/worker-pools/), [preemptible](https://typhoon.psdn.io/fedora-coreos/google-cloud/#preemption) workers, and [snippets](https://typhoon.psdn.io/advanced/customization/#hosts) customization
--- a/google-cloud/fedora-coreos/kubernetes/bootstrap.tf
+++ b/google-cloud/fedora-coreos/kubernetes/bootstrap.tf
@ -1,6 +1,6 @@
 # Kubernetes assets (kubeconfig, manifests)
 module "bootstrap" {
-  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=f45deec67e2fea4f06b5a3edad628b0fe0e9ec60"
+  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=26bea83b957d18b99e16435405983181c4a6e159"

  cluster_name          = var.cluster_name
  api_servers           = [format("%s.%s", var.cluster_name, var.dns_zone)]
--- a/google-cloud/fedora-coreos/kubernetes/fcc/controller.yaml
+++ b/google-cloud/fedora-coreos/kubernetes/fcc/controller.yaml
@ -53,7 +53,7 @@ systemd:
        Description=Kubelet (System Container)
        Wants=rpc-statd.service
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        ExecStartPre=/bin/mkdir -p /etc/cni/net.d
        ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
        ExecStartPre=/bin/mkdir -p /opt/cni/bin
@ -121,7 +121,7 @@ systemd:
            --volume /opt/bootstrap/assets:/assets:ro,Z \
            --volume /opt/bootstrap/apply:/apply:ro,Z \
            --entrypoint=/apply \
-            quay.io/poseidon/kubelet:v1.23.2
+            quay.io/poseidon/kubelet:v1.23.3
        ExecStartPost=/bin/touch /opt/bootstrap/bootstrap.done
        ExecStartPost=-/usr/bin/podman stop bootstrap
 storage:
--- a/google-cloud/fedora-coreos/kubernetes/workers/fcc/worker.yaml
+++ b/google-cloud/fedora-coreos/kubernetes/workers/fcc/worker.yaml
@ -26,7 +26,7 @@ systemd:
        Description=Kubelet (System Container)
        Wants=rpc-statd.service
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        ExecStartPre=/bin/mkdir -p /etc/cni/net.d
        ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
        ExecStartPre=/bin/mkdir -p /opt/cni/bin
@ -89,7 +89,7 @@ systemd:
        [Unit]
        Description=Delete Kubernetes node on shutdown
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        Type=oneshot
        RemainAfterExit=true
        ExecStart=/bin/true
--- a/google-cloud/flatcar-linux/kubernetes/README.md
+++ b/google-cloud/flatcar-linux/kubernetes/README.md
@ -11,7 +11,7 @@ Typhoon distributes upstream Kubernetes, architectural conventions, and cluster

 ## Features <a href="https://www.cncf.io/certification/software-conformance/"><img align="right" src="https://storage.googleapis.com/poseidon/certified-kubernetes.png"></a>

-* Kubernetes v1.23.2 (upstream)
+* Kubernetes v1.23.3 (upstream)
 * Single or multi-master, [Calico](https://www.projectcalico.org/) or [Cilium](https://github.com/cilium/cilium) or [flannel](https://github.com/coreos/flannel) networking
 * On-cluster etcd with TLS, [RBAC](https://kubernetes.io/docs/admin/authorization/rbac/)-enabled, [network policy](https://kubernetes.io/docs/concepts/services-networking/network-policies/)
 * Advanced features like [worker pools](https://typhoon.psdn.io/advanced/worker-pools/), [preemptible](https://typhoon.psdn.io/flatcar-linux/google-cloud/#preemption) workers, and [snippets](https://typhoon.psdn.io/advanced/customization/#hosts) customization
--- a/google-cloud/flatcar-linux/kubernetes/bootstrap.tf
+++ b/google-cloud/flatcar-linux/kubernetes/bootstrap.tf
@ -1,6 +1,6 @@
 # Kubernetes assets (kubeconfig, manifests)
 module "bootstrap" {
-  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=f45deec67e2fea4f06b5a3edad628b0fe0e9ec60"
+  source = "git::https://github.com/poseidon/terraform-render-bootstrap.git?ref=26bea83b957d18b99e16435405983181c4a6e159"

  cluster_name          = var.cluster_name
  api_servers           = [format("%s.%s", var.cluster_name, var.dns_zone)]
--- a/google-cloud/flatcar-linux/kubernetes/cl/controller.yaml
+++ b/google-cloud/flatcar-linux/kubernetes/cl/controller.yaml
@ -55,7 +55,7 @@ systemd:
        After=docker.service
        Wants=rpc-statd.service
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        ExecStartPre=/bin/mkdir -p /etc/cni/net.d
        ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
        ExecStartPre=/bin/mkdir -p /opt/cni/bin
@ -117,7 +117,7 @@ systemd:
        Type=oneshot
        RemainAfterExit=true
        WorkingDirectory=/opt/bootstrap
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        ExecStart=/usr/bin/docker run \
            -v /etc/kubernetes/pki:/etc/kubernetes/pki:ro \
            -v /opt/bootstrap/assets:/assets:ro \
--- a/google-cloud/flatcar-linux/kubernetes/controllers.tf
+++ b/google-cloud/flatcar-linux/kubernetes/controllers.tf
@ -42,7 +42,7 @@ resource "google_compute_instance" "controllers" {
    auto_delete = true

    initialize_params {
-      image = var.os_image
+      image = data.google_compute_image.flatcar-linux.self_link
      size  = var.disk_size
    }
  }
--- a/google-cloud/flatcar-linux/kubernetes/image.tf
+++ b/google-cloud/flatcar-linux/kubernetes/image.tf
@ -0,0 +1,6 @@
+# Flatcar Linux most recent image from channel
+data "google_compute_image" "flatcar-linux" {
+  project = "kinvolk-public"
+  family  = "${var.os_image}"
+}
+
--- a/google-cloud/flatcar-linux/kubernetes/variables.tf
+++ b/google-cloud/flatcar-linux/kubernetes/variables.tf
@ -48,7 +48,13 @@ variable "worker_type" {

 variable "os_image" {
  type        = string
-  description = "Flatcar Linux image for compute instances (e.g. custom-image)"
+  description = "Flatcar Linux image for compute instances (flatcar-stable, flatcar-beta, flatcar-alpha)"
+  default     = "flatcar-stable"
+
+  validation {
+    condition     = contains(["flatcar-stable", "flatcar-beta", "flatcar-alpha"], var.os_image)
+    error_message = "The os_image must be flatcar-stable, flatcar-beta, or flatcar-alpha."
+  }
 }

 variable "disk_size" {
--- a/google-cloud/flatcar-linux/kubernetes/workers/cl/worker.yaml
+++ b/google-cloud/flatcar-linux/kubernetes/workers/cl/worker.yaml
@ -27,7 +27,7 @@ systemd:
        After=docker.service
        Wants=rpc-statd.service
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        ExecStartPre=/bin/mkdir -p /etc/cni/net.d
        ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
        ExecStartPre=/bin/mkdir -p /opt/cni/bin
@ -92,7 +92,7 @@ systemd:
        [Unit]
        Description=Delete Kubernetes node on shutdown
        [Service]
-        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.2
+        Environment=KUBELET_IMAGE=quay.io/poseidon/kubelet:v1.23.3
        Type=oneshot
        RemainAfterExit=true
        ExecStart=/bin/true
--- a/google-cloud/flatcar-linux/kubernetes/workers/image.tf
+++ b/google-cloud/flatcar-linux/kubernetes/workers/image.tf
@ -0,0 +1,5 @@
+# Flatcar Linux most recent image from channel
+data "google_compute_image" "flatcar-linux" {
+  project = "kinvolk-public"
+  family  = "${var.os_image}"
+}
--- a/google-cloud/flatcar-linux/kubernetes/workers/variables.tf
+++ b/google-cloud/flatcar-linux/kubernetes/workers/variables.tf
@ -36,7 +36,13 @@ variable "machine_type" {

 variable "os_image" {
  type        = string
-  description = "Flatcar Linux image for compute instanges (e.g. gcloud compute images list)"
+  description = "Flatcar Linux image for compute instances (flatcar-stable, flatcar-beta, flatcar-alpha)"
+  default     = "flatcar-stable"
+
+  validation {
+    condition     = contains(["flatcar-stable", "flatcar-beta", "flatcar-alpha"], var.os_image)
+    error_message = "The os_image must be flatcar-stable, flatcar-beta, or flatcar-alpha."
+  }
 }

 variable "disk_size" {
--- a/google-cloud/flatcar-linux/kubernetes/workers/workers.tf
+++ b/google-cloud/flatcar-linux/kubernetes/workers/workers.tf
@ -43,7 +43,7 @@ resource "google_compute_instance_template" "worker" {
  disk {
    auto_delete  = true
    boot         = true
-    source_image = var.os_image
+    source_image = data.google_compute_image.flatcar-linux.self_link
    disk_size_gb = var.disk_size
  }

--- a/requirements.txt
+++ b/requirements.txt
@ -1,4 +1,4 @@
 mkdocs==1.2.3
-mkdocs-material==8.1.7
+mkdocs-material==8.1.8
 pygments==2.11.2
 pymdown-extensions==9.1