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main.tf
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main.tf
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variable "on_calendar" {
type = string
}
variable "use_deprecated_docker_runtime" {
description = "Use legacy docker container runtime"
default = false
type = bool
}
data "ignition_systemd_unit" "cert-refresh" {
name = "cert-refresh.service"
content = <<EOS
[Unit]
Description=Fetch new certificates from cfssl server and restart components to reload certs
${var.use_deprecated_docker_runtime ? "Requires=docker.service" : "Requires=containerd.service prepare-crictl.service" }
After=network-online.target
[Service]
Type=oneshot
ExecStart=/opt/bin/cfssl-keys-and-certs-get
ExecStart=/opt/bin/cfssl-new-node-cert
ExecStart=/opt/bin/cfssl-new-kubelet-cert
ExecStart=/opt/bin/cfssl-new-apiserver-cert
ExecStart=/opt/bin/cfssl-new-apiserver-kubelet-client-cert
ExecStart=/opt/bin/cfssl-new-scheduler-cert
ExecStart=/opt/bin/cfssl-new-controller-manager-cert
# Hack to reload certs on control plane tier
# https://github.com/kubernetes/kubernetes/issues/46287
ExecStart=-/bin/sh -c "${var.use_deprecated_docker_runtime ? "docker restart $(docker ps -q -f name=k8s_kube-controller-manager" : "/opt/bin/crictl stop $(/opt/bin/crictl ps -q --label io.kubernetes.container.name=kube-controller-manager)"}"
ExecStart=-/bin/sh -c "${var.use_deprecated_docker_runtime ? "docker restart $(docker ps -q -f name=k8s_kube-apiserver)" : "/opt/bin/crictl stop $(/opt/bin/crictl ps -q --label io.kubernetes.container.name=kube-apiserver)"}"
ExecStart=-/bin/sh -c "${var.use_deprecated_docker_runtime ? "docker restart $(docker ps -q -f name=k8s_kube-scheduler)" : "/opt/bin/crictl stop $(/opt/bin/crictl ps -q --label io.kubernetes.container.name=kube-scheduler)"}"
ExecStart=/usr/bin/systemctl try-restart kubelet.service
Restart=on-failure
RestartSec=10
[Install]
WantedBy=multi-user.target
EOS
}
data "ignition_systemd_unit" "cert-refresh-timer" {
name = "cert-refresh.timer"
content = <<EOS
[Unit]
Description=Fetch new certificates from cfssl server and restart components to reload certs
[Timer]
OnCalendar=${var.on_calendar}
AccuracySec=1s
RandomizedDelaySec=60min
[Install]
WantedBy=timers.target
EOS
}
output "systemd_units" {
value = [
data.ignition_systemd_unit.cert-refresh.rendered,
data.ignition_systemd_unit.cert-refresh-timer.rendered,
]
}