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Migrate Container Linux AWS to static pod control plane

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* Run a kube-apiserver, kube-scheduler, and kube-controller-manager
static pod on each controller node. Previously, kube-apiserver was
self-hosted as a DaemonSet across controllers and kube-scheduler
and kube-controller-manager were a Deployment (with 2 or
controller_count many replicas).
* Remove bootkube bootstrap and pivot to self-hosted
* Remove pod-checkpointer manifests (no longer needed)
This commit is contained in:
Dalton Hubble
2019-09-04 22:20:36 -07:00
parent 21632c6674
commit c933bdfc26
6 changed files with 84 additions and 59 deletions
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34
aws/container-linux/kubernetes/ssh.tf
View File

@ -1,10 +1,14 @@
# Secure copy etcd TLS assets to controllers.
# Secure copy assets to controllers.
resource "null_resource" "copy-controller-secrets" {
count = var.controller_count
depends_on = [
module.bootkube,
]
connection {
type = "ssh"
host = element(aws_instance.controllers.*.public_ip, count.index)
host = aws_instance.controllers.*.public_ip[count.index]
user = "core"
timeout = "15m"
}
@ -43,6 +47,11 @@ resource "null_resource" "copy-controller-secrets" {
content = module.bootkube.etcd_peer_key
destination = "$HOME/etcd-peer.key"
}
provisioner "file" {
source = var.asset_dir
destination = "$HOME/assets"
}
provisioner "remote-exec" {
inline = [
@ -56,18 +65,21 @@ resource "null_resource" "copy-controller-secrets" {
"sudo mv etcd-peer.key /etc/ssl/etcd/etcd/peer.key",
"sudo chown -R etcd:etcd /etc/ssl/etcd",
"sudo chmod -R 500 /etc/ssl/etcd",
"sudo mv $HOME/assets /opt/bootstrap/assets",
"sudo mkdir -p /etc/kubernetes/bootstrap-secrets",
"sudo cp -r /opt/bootstrap/assets/tls/* /etc/kubernetes/bootstrap-secrets/",
"sudo cp /opt/bootstrap/assets/auth/kubeconfig /etc/kubernetes/bootstrap-secrets/",
"sudo cp -r /opt/bootstrap/assets/static-manifests/* /etc/kubernetes/manifests/",
]
}
}
# Secure copy bootkube assets to ONE controller and start bootkube to perform
# one-time self-hosted cluster bootstrapping.
resource "null_resource" "bootkube-start" {
# Connect to a controller to perform one-time cluster bootstrap.
resource "null_resource" "bootstrap" {
depends_on = [
module.bootkube,
null_resource.copy-controller-secrets,
module.workers,
aws_route53_record.apiserver,
null_resource.copy-controller-secrets,
]
connection {
@ -77,15 +89,9 @@ resource "null_resource" "bootkube-start" {
timeout = "15m"
}
provisioner "file" {
source = var.asset_dir
destination = "$HOME/assets"
}
provisioner "remote-exec" {
inline = [
"sudo mv $HOME/assets /opt/bootkube",
"sudo systemctl start bootkube",
"sudo systemctl start bootstrap",
]
}
}