bare-metal: Ues Terraform templating for Container Linux configs
* Template bare-metal Container Linux configs with Terraform's (limited) template_file module. This allows rendering problems to be identified during `terraform plan` and is favored over using the Matchbox templating feature when the configs are served to PXE booting nodes. * Writes a Matchbox profile for each machine, which will be served as-is. The effect is the same, each node gets provisioned with its own Container Linux config.
This commit is contained in:
Dalton Hubble
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cd368c123f
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bca96bb124
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@ -9,12 +9,12 @@ systemd:
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contents: |
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[Service]
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Environment="ETCD_IMAGE_TAG=v3.2.0"
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Environment="ETCD_NAME={{.etcd_name}}"
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Environment="ETCD_ADVERTISE_CLIENT_URLS=https://{{.domain_name}}:2379"
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Environment="ETCD_INITIAL_ADVERTISE_PEER_URLS=https://{{.domain_name}}:2380"
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Environment="ETCD_NAME=${etcd_name}"
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Environment="ETCD_ADVERTISE_CLIENT_URLS=https://${domain_name}:2379"
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Environment="ETCD_INITIAL_ADVERTISE_PEER_URLS=https://${domain_name}:2380"
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Environment="ETCD_LISTEN_CLIENT_URLS=https://0.0.0.0:2379"
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Environment="ETCD_LISTEN_PEER_URLS=https://0.0.0.0:2380"
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Environment="ETCD_INITIAL_CLUSTER={{.etcd_initial_cluster}}"
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Environment="ETCD_INITIAL_CLUSTER=${etcd_initial_cluster}"
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Environment="ETCD_STRICT_RECONFIG_CHECK=true"
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Environment="ETCD_SSL_DIR=/etc/ssl/etcd"
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Environment="ETCD_TRUSTED_CA_FILE=/etc/ssl/certs/etcd/server-ca.crt"
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@ -79,11 +79,11 @@ systemd:
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--allow-privileged \
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--anonymous-auth=false \
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--client-ca-file=/etc/kubernetes/ca.crt \
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--cluster_dns={{.k8s_dns_service_ip}} \
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--cluster_dns=${k8s_dns_service_ip} \
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--cluster_domain=cluster.local \
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--cni-conf-dir=/etc/kubernetes/cni/net.d \
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--exit-on-lock-contention \
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--hostname-override={{.domain_name}} \
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--hostname-override=${domain_name} \
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--kubeconfig=/etc/kubernetes/kubeconfig \
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--lock-file=/var/run/lock/kubelet.lock \
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--network-plugin=cni \
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@ -137,7 +137,7 @@ storage:
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mode: 0644
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contents:
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inline:
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{{.domain_name}}
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${domain_name}
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- path: /etc/sysctl.d/max-user-watches.conf
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filesystem: root
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contents:
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@ -159,17 +159,17 @@ storage:
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[ -d /opt/bootkube/assets/manifests-* ] && mv /opt/bootkube/assets/manifests-*/* /opt/bootkube/assets/manifests && rm -rf /opt/bootkube/assets/manifests-*
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[ -d /opt/bootkube/assets/experimental/manifests ] && mv /opt/bootkube/assets/experimental/manifests/* /opt/bootkube/assets/manifests && rm -r /opt/bootkube/assets/experimental/manifests
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[ -d /opt/bootkube/assets/experimental/bootstrap-manifests ] && mv /opt/bootkube/assets/experimental/bootstrap-manifests/* /opt/bootkube/assets/bootstrap-manifests && rm -r /opt/bootkube/assets/experimental/bootstrap-manifests
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BOOTKUBE_ACI="${BOOTKUBE_ACI:-quay.io/coreos/bootkube}"
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BOOTKUBE_VERSION="${BOOTKUBE_VERSION:-v0.6.2}"
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BOOTKUBE_ASSETS="${BOOTKUBE_ASSETS:-/opt/bootkube/assets}"
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BOOTKUBE_ACI="$${BOOTKUBE_ACI:-quay.io/coreos/bootkube}"
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BOOTKUBE_VERSION="$${BOOTKUBE_VERSION:-v0.6.2}"
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BOOTKUBE_ASSETS="$${BOOTKUBE_ASSETS:-/opt/bootkube/assets}"
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exec /usr/bin/rkt run \
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--trust-keys-from-https \
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--volume assets,kind=host,source=$BOOTKUBE_ASSETS \
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--mount volume=assets,target=/assets \
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--volume bootstrap,kind=host,source=/etc/kubernetes \
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--mount volume=bootstrap,target=/etc/kubernetes \
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$RKT_OPTS \
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${BOOTKUBE_ACI}:${BOOTKUBE_VERSION} \
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$$RKT_OPTS \
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$${BOOTKUBE_ACI}:$${BOOTKUBE_VERSION} \
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--net=host \
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--dns=host \
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--exec=/bootkube -- start --asset-dir=/assets "$@"
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@ -177,5 +177,4 @@ passwd:
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users:
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- name: core
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ssh_authorized_keys:
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- {{.ssh_authorized_key}}
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- ${ssh_authorized_key}
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@ -54,11 +54,11 @@ systemd:
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--allow-privileged \
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--anonymous-auth=false \
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--client-ca-file=/etc/kubernetes/ca.crt \
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--cluster_dns={{.k8s_dns_service_ip}} \
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--cluster_dns=${k8s_dns_service_ip} \
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--cluster_domain=cluster.local \
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--cni-conf-dir=/etc/kubernetes/cni/net.d \
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--exit-on-lock-contention \
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--hostname-override={{.domain_name}} \
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--hostname-override=${domain_name} \
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--kubeconfig=/etc/kubernetes/kubeconfig \
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--lock-file=/var/run/lock/kubelet.lock \
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--network-plugin=cni \
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@ -101,7 +101,7 @@ storage:
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mode: 0644
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contents:
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inline:
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{{.domain_name}}
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${domain_name}
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- path: /etc/sysctl.d/max-user-watches.conf
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filesystem: root
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contents:
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@ -111,5 +111,5 @@ passwd:
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users:
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- name: core
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ssh_authorized_keys:
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- {{.ssh_authorized_key}}
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- ${ssh_authorized_key}
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@ -17,7 +17,7 @@ resource "matchbox_group" "container-linux-install" {
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resource "matchbox_group" "controller" {
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count = "${length(var.controller_names)}"
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name = "${format("%s-%s", var.cluster_name, element(var.controller_names, count.index))}"
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profile = "${matchbox_profile.controller.name}"
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profile = "${element(matchbox_profile.controllers.*.name, count.index)}"
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selector {
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mac = "${element(var.controller_macs, count.index)}"
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@ -25,29 +25,17 @@ resource "matchbox_group" "controller" {
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}
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metadata {
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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 = "${join(",", formatlist("%s=https://%s:2380", var.controller_names, var.controller_domains))}"
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etcd_on_host = "${var.experimental_self_hosted_etcd ? "false" : "true"}"
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k8s_dns_service_ip = "${module.bootkube.kube_dns_service_ip}"
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ssh_authorized_key = "${var.ssh_authorized_key}"
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}
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}
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resource "matchbox_group" "worker" {
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count = "${length(var.worker_names)}"
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name = "${format("%s-%s", var.cluster_name, element(var.worker_names, count.index))}"
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profile = "${matchbox_profile.worker.name}"
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profile = "${element(matchbox_profile.workers.*.name, count.index)}"
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selector {
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mac = "${element(var.worker_macs, count.index)}"
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os = "installed"
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}
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metadata {
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domain_name = "${element(var.worker_domains, count.index)}"
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etcd_on_host = "${var.experimental_self_hosted_etcd ? "false" : "true"}"
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k8s_dns_service_ip = "${module.bootkube.kube_dns_service_ip}"
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ssh_authorized_key = "${var.ssh_authorized_key}"
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}
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}
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@ -67,14 +67,42 @@ data "template_file" "cached-container-linux-install-config" {
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}
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}
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// Kubernetes Controller profile
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resource "matchbox_profile" "controller" {
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name = "controller"
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container_linux_config = "${file("${path.module}/cl/controller.yaml.tmpl")}"
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// Kubernetes Controller profiles
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resource "matchbox_profile" "controllers" {
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count = "${length(var.controller_names)}"
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name = "${format("%s-controller-%s", var.cluster_name, element(var.controller_names, count.index))}"
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container_linux_config = "${element(data.template_file.controller-configs.*.rendered, count.index)}"
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}
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// Kubernetes Worker profile
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resource "matchbox_profile" "worker" {
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name = "worker"
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container_linux_config = "${file("${path.module}/cl/worker.yaml.tmpl")}"
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data "template_file" "controller-configs" {
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count = "${length(var.controller_names)}"
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template = "${file("${path.module}/cl/controller.yaml.tmpl")}"
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vars {
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domain_name = "${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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k8s_dns_service_ip = "${module.bootkube.kube_dns_service_ip}"
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ssh_authorized_key = "${var.ssh_authorized_key}"
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}
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}
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// Kubernetes Worker profiles
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resource "matchbox_profile" "workers" {
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count = "${length(var.worker_names)}"
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name = "${format("%s-worker-%s", var.cluster_name, element(var.worker_names, count.index))}"
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container_linux_config = "${element(data.template_file.worker-configs.*.rendered, count.index)}"
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}
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data "template_file" "worker-configs" {
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count = "${length(var.worker_names)}"
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template = "${file("${path.module}/cl/worker.yaml.tmpl")}"
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vars {
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domain_name = "${element(var.worker_domains, count.index)}"
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k8s_dns_service_ip = "${module.bootkube.kube_dns_service_ip}"
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ssh_authorized_key = "${var.ssh_authorized_key}"
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}
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}
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