Configure Kubelet cgroup-driver for Flatcar Linux Edge
* For Container Linux or Flatcar Linux alpha/beta/stable, continue using the `cgroupfs` driver * For Fedora Atomic, continue using the `systemd` driver * For Flatcar Linux Edge, use the `systemd` driver
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@ -63,6 +63,7 @@ systemd:
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--volume var-log,kind=host,source=/var/log \
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--mount volume=var-log,target=/var/log \
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--insecure-options=image"
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Environment=KUBELET_CGROUP_DRIVER=${cgroup_driver}
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ExecStartPre=/bin/mkdir -p /opt/cni/bin
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ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
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ExecStartPre=/bin/mkdir -p /etc/kubernetes/cni/net.d
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@ -77,6 +78,7 @@ systemd:
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--anonymous-auth=false \
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--authentication-token-webhook \
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--authorization-mode=Webhook \
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--cgroup-driver=$${KUBELET_CGROUP_DRIVER} \
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--client-ca-file=/etc/kubernetes/ca.crt \
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--cluster_dns=${cluster_dns_service_ip} \
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--cluster_domain=${cluster_domain_suffix} \
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@ -69,6 +69,7 @@ data "template_file" "controller-configs" {
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etcd_domain = "${var.cluster_name}-etcd${count.index}.${var.dns_zone}"
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# etcd0=https://cluster-etcd0.example.com,etcd1=https://cluster-etcd1.example.com,...
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etcd_initial_cluster = join(",", data.template_file.etcds.*.rendered)
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cgroup_driver = local.flavor == "flatcar" && local.channel == "edge" ? "systemd" : "cgroupfs"
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kubeconfig = indent(10, module.bootkube.kubeconfig-kubelet)
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ssh_authorized_key = var.ssh_authorized_key
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cluster_dns_service_ip = cidrhost(var.service_cidr, 10)
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@ -38,6 +38,7 @@ systemd:
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--volume var-log,kind=host,source=/var/log \
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--mount volume=var-log,target=/var/log \
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--insecure-options=image"
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Environment=KUBELET_CGROUP_DRIVER=${cgroup_driver}
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ExecStartPre=/bin/mkdir -p /opt/cni/bin
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ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
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ExecStartPre=/bin/mkdir -p /etc/kubernetes/cni/net.d
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@ -50,6 +51,7 @@ systemd:
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--anonymous-auth=false \
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--authentication-token-webhook \
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--authorization-mode=Webhook \
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--cgroup-driver=$${KUBELET_CGROUP_DRIVER} \
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--client-ca-file=/etc/kubernetes/ca.crt \
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--cluster_dns=${cluster_dns_service_ip} \
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--cluster_domain=${cluster_domain_suffix} \
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@ -84,6 +84,7 @@ data "template_file" "worker-config" {
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ssh_authorized_key = var.ssh_authorized_key
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cluster_dns_service_ip = cidrhost(var.service_cidr, 10)
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cluster_domain_suffix = var.cluster_domain_suffix
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cgroup_driver = local.flavor == "flatcar" && local.channel == "edge" ? "systemd" : "cgroupfs"
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}
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}
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@ -75,6 +75,7 @@ systemd:
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--volume iscsiadm,kind=host,source=/usr/sbin/iscsiadm \
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--mount volume=iscsiadm,target=/sbin/iscsiadm \
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--insecure-options=image"
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Environment=KUBELET_CGROUP_DRIVER=${cgroup_driver}
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ExecStartPre=/bin/mkdir -p /opt/cni/bin
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ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
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ExecStartPre=/bin/mkdir -p /etc/kubernetes/cni/net.d
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@ -89,6 +90,7 @@ systemd:
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--anonymous-auth=false \
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--authentication-token-webhook \
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--authorization-mode=Webhook \
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--cgroup-driver=$${KUBELET_CGROUP_DRIVER} \
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--client-ca-file=/etc/kubernetes/ca.crt \
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--cluster_dns=${cluster_dns_service_ip} \
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--cluster_domain=${cluster_domain_suffix} \
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@ -50,6 +50,7 @@ systemd:
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--volume iscsiadm,kind=host,source=/usr/sbin/iscsiadm \
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--mount volume=iscsiadm,target=/sbin/iscsiadm \
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--insecure-options=image"
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Environment=KUBELET_CGROUP_DRIVER=${cgroup_driver}
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ExecStartPre=/bin/mkdir -p /opt/cni/bin
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ExecStartPre=/bin/mkdir -p /etc/kubernetes/manifests
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ExecStartPre=/bin/mkdir -p /etc/kubernetes/cni/net.d
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@ -62,6 +63,7 @@ systemd:
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--anonymous-auth=false \
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--authentication-token-webhook \
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--authorization-mode=Webhook \
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--cgroup-driver=$${KUBELET_CGROUP_DRIVER} \
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--client-ca-file=/etc/kubernetes/ca.crt \
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--cluster_dns=${cluster_dns_service_ip} \
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--cluster_domain=${cluster_domain_suffix} \
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@ -159,6 +159,7 @@ data "template_file" "controller-configs" {
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domain_name = element(var.controller_domains, count.index)
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etcd_name = element(var.controller_names, count.index)
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etcd_initial_cluster = join(",", formatlist("%s=https://%s:2380", var.controller_names, var.controller_domains))
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cgroup_driver = var.os_channel == "flatcar-edge" ? "systemd" : "cgroupfs"
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cluster_dns_service_ip = module.bootkube.cluster_dns_service_ip
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cluster_domain_suffix = var.cluster_domain_suffix
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ssh_authorized_key = var.ssh_authorized_key
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@ -186,6 +187,7 @@ data "template_file" "worker-configs" {
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vars = {
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domain_name = element(var.worker_domains, count.index)
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cgroup_driver = var.os_channel == "flatcar-edge" ? "systemd" : "cgroupfs"
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cluster_dns_service_ip = module.bootkube.cluster_dns_service_ip
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cluster_domain_suffix = var.cluster_domain_suffix
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ssh_authorized_key = var.ssh_authorized_key
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@ -14,12 +14,12 @@ Together, they diversify Typhoon to support a range of container technologies.
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## Host Properties
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| Property | Container Linux | Fedora Atomic |
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|-------------------|-----------------|---------------|
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| Property | Container Linux / Flatcar Linux | Fedora Atomic |
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|-------------------|-----------------|---------------|---------------|
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| host spec (bare-metal) | Container Linux Config | kickstart, cloud-init |
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| host spec (cloud) | Container Linux Config | cloud-init |
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| container runtime | docker | docker (CRIO planned) |
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| cgroup driver | cgroupfs | systemd |
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| cgroup driver | cgroupfs (except Flatcar edge) | systemd |
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| logging driver | json-file | journald |
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| storage driver | overlay2 | overlay2 |
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