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Migrate GCP, DO, Azure 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
2019-09-05 23:12:09 -07:00
parent c933bdfc26
commit db947537d1
21 changed files with 235 additions and 199 deletions
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31
digital-ocean/container-linux/kubernetes/ssh.tf
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@@ -1,14 +1,15 @@
# Secure copy etcd TLS assets and kubeconfig to controllers. Activates kubelet.service
# Secure copy assets to controllers. Activates kubelet.service
resource "null_resource" "copy-controller-secrets" {
count = var.controller_count
depends_on = [
module.bootkube,
digitalocean_firewall.rules
]
connection {
type = "ssh"
host = element(digitalocean_droplet.controllers.*.ipv4_address, count.index)
host = digitalocean_droplet.controllers.*.ipv4_address[count.index]
user = "core"
timeout = "15m"
}
@@ -52,6 +53,11 @@ 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 = [
@@ -66,6 +72,11 @@ resource "null_resource" "copy-controller-secrets" {
"sudo chown -R etcd:etcd /etc/ssl/etcd",
"sudo chmod -R 500 /etc/ssl/etcd",
"sudo mv $HOME/kubeconfig /etc/kubernetes/kubeconfig",
"sudo mv $HOME/assets /opt/bootstrap/assets",
"sudo mkdir -p /etc/kubernetes/bootstrap-secrets",
"sudo cp -r /opt/bootstrap/assets/tls/* /etc/kubernetes/bootstrap-secrets/",
"sudo cp /opt/bootstrap/assets/auth/kubeconfig /etc/kubernetes/bootstrap-secrets/",
"sudo cp -r /opt/bootstrap/assets/static-manifests/* /etc/kubernetes/manifests/",
]
}
}
@@ -76,7 +87,7 @@ resource "null_resource" "copy-worker-secrets" {
connection {
type = "ssh"
host = element(digitalocean_droplet.workers.*.ipv4_address, count.index)
host = digitalocean_droplet.workers.*.ipv4_address[count.index]
user = "core"
timeout = "15m"
}
@@ -93,11 +104,9 @@ resource "null_resource" "copy-worker-secrets" {
}
}
# Secure copy bootkube assets to ONE controller and start bootkube to perform
# one-time self-hosted cluster bootstrapping.
resource "null_resource" "bootkube-start" {
# Connect to a controller to perform one-time cluster bootstrap.
resource "null_resource" "bootstrap" {
depends_on = [
module.bootkube,
null_resource.copy-controller-secrets,
null_resource.copy-worker-secrets,
]
@@ -109,15 +118,9 @@ resource "null_resource" "bootkube-start" {
timeout = "15m"
}
provisioner "file" {
source = var.asset_dir
destination = "$HOME/assets"
}
provisioner "remote-exec" {
inline = [
"sudo mv $HOME/assets /opt/bootkube",
"sudo systemctl start bootkube",
"sudo systemctl start bootstrap",
]
}
}