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spinifex/scripts/images/eks-node/k3s.initd
T
Josh Siviour f14fb64562 feat(eks): unify eks-server + eks-agent into one eks-node AMI (#288)
* feat(eks): unify eks-server + eks-agent into one eks-node AMI

Collapse the two K3s AMIs into a single spinifex-eks-node image whose role
(server vs agent) is chosen per-instance at first boot, halving build time,
storage, and CVE-rotation surface.

- scripts/images/eks-node/: superset manifest + merged setup.sh; all role
  services baked but only crond + the new eks-node-role selector enabled.
- eks-node-role first-boot selector reads SPINIFEX_K3S_ROLE, rc-update adds +
  starts the matching services (server: k3s + eks-token-webhook + k3s-first-boot
  publisher; agent: k3s-agent), records /etc/spinifex-eks/role, self-disables.
  Paths are env-overridable; eks-node-role_test.sh covers all five cases.
- mulga-eks-etcd-snapshot.sh early-exits on agent nodes.
- k3s_server_vm.go seeds SPINIFEX_K3S_ROLE=server into first-boot.env.
- Makefile/dev-install: build-eks-node-image / import-eks-node-image replace
  the server+agent targets.
- Delete scripts/images/eks-server + eks-agent. The launcher resolves the AMI
  by the spinifex:managed-by=eks tag, so running clusters (which hold the
  resolved AMI ID) are unaffected.

AMI bake + cluster boot are operational integration steps, not yet run.

* fix(eks): order eks-node-role after cloud-config/cloud-final

The first-boot role selector reads /etc/spinifex-eks/first-boot.env, which
cloud-init delivers via write_files in the cloud-config/cloud-final stages.
The selector only depended on net+cgroups, so on a fast boot it could start
before write_files landed and read a missing role env. Add an after-ordering
on cloud-config + cloud-final so the env file is always present first.
2026-06-04 12:28:56 +10:00

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#!/sbin/openrc-run
# K3s server control plane. v1 = single-node embedded SQLite (kine) datastore;
# the per-cluster config.yaml omits cluster-init so k3s uses SQLite, not etcd
# (etcd's per-commit fsync stalls on the viperblock root volume). Data lives at
# /var/lib/rancher/k3s; subsequent starts reuse it. Multi-server HA needs etcd
# and is deferred.
description="K3s Kubernetes server (Mulga EKS control plane)"
command="/usr/local/bin/k3s"
command_args="server --config /etc/rancher/k3s/config.yaml"
command_background="yes"
pidfile="/run/k3s.pid"
output_log="/var/log/k3s.log"
error_log="/var/log/k3s.log"
# Generous start timeout — K3s bootstraps containerd, initialises the SQLite
# datastore, pulls system images. First boot can take 2-3 minutes on cold cache.
start_stop_daemon_args="--wait 5000"
depend() {
need net cgroups
after firewall
}
start_pre() {
# config.yaml is written by k3s-first-boot from the skeleton + cloud-init
# data. Refuse to start if neither exists.
if [ ! -f /etc/rancher/k3s/config.yaml ]; then
if [ -f /etc/rancher/k3s/config.yaml.skel ]; then
cp /etc/rancher/k3s/config.yaml.skel /etc/rancher/k3s/config.yaml
else
eerror "no /etc/rancher/k3s/config.yaml and no .skel to derive from"
return 1
fi
fi
# The apiserver is configured with --authentication-token-webhook-config-file
# pointing at the kubeconfig eks-token-webhook writes at startup. `before k3s`
# orders the webhook's start but it backgrounds, so wait (bounded) for the
# kubeconfig to land before letting the apiserver load a missing file.
i=0
while [ ! -f /etc/spinifex-eks/token-webhook.kubeconfig ] && [ "${i}" -lt 30 ]; do
sleep 1
i=$((i + 1))
done
if [ ! -f /etc/spinifex-eks/token-webhook.kubeconfig ]; then
ewarn "eks-token-webhook kubeconfig absent after ${i}s; IAM token auth will be unavailable until the webhook starts"
fi
}