Goal: re-clone the worker template, boot, and have it appear as `kubectl
get nodes …Ready` with no manual steps. Adds `scripts/provision-k8s-worker
NAME VMID IP` and rebuilds the cloud-init pipeline that was failing five
distinct ways on a clean boot.
Bugs fixed (all hit during the k8s-node5 + k8s-node6 builds today):
1. `indent(6, containerd_config_update_command)` indented the bodies of
`cat >> /etc/containerd/config.toml <<'CONTAINERD_GC'` heredocs, so
[plugins.*] TOML sections landed in /etc/containerd/config.toml at
col 6 — containerd refused to parse them. Source is now a normal
.sh file (`modules/create-template-vm/k8s-node-containerd-setup.sh`)
base64-embedded into `write_files`; YAML whitespace never touches
the heredoc bodies.
2. The same script tried to `cat >> /etc/containerd/config.toml`
`[plugins."io.containerd.gc.v1.scheduler"]` etc., which containerd
v2.2.4's `config default` ALREADY emits. Result: `toml: table …
already exists`. Patched with sed-in-place overrides instead.
3. Kubelet tuning (sed against /var/lib/kubelet/config.yaml) ran from
the containerd setup script — BEFORE `kubeadm join` writes that
file. Sed aborted with "No such file or directory", `set -e` killed
the script, post-script cloud-init steps kept going (cloud-init
doesn't stop on runcmd failure). Split into a dedicated
`k8s-node-post-join-tune.sh` invoked AFTER kubeadm join.
4. cloud_init.yaml fallocate'd a 4G swapfile and `swapon`'d it BEFORE
kubeadm join. kubelet defaults to failSwapOn=true → exited 1
immediately. Replaced the swap setup with `swapoff -a` (node4
already runs this way and the cluster is fine).
5. Without `hostname:` in the shared user-data snippet, Proxmox's
auto-generated meta-data does NOT include local-hostname when
`cicustom user=…` is set — so cloud-init falls back to the cloud
image's default `ubuntu` and `kubeadm join` registers the wrong
node name. `provision-k8s-worker` now writes a per-node
`<NAME>-meta.yaml` snippet and passes both via
`cicustom user=…,meta=…`.
Other improvements rolled in while fixing the above:
- `ssh_public_key` read from Vault (`secret/viktor.ssh_public_key`,
added today) instead of `var.ssh_public_key`. The last
`terragrunt apply` was run with that var empty, leaving the snippet's
`ssh_authorized_keys` with a single blank entry; the wizard user
was effectively locked out of every fresh node.
- `cloud_init.yaml` adds `/etc/systemd/resolved.conf.d/global-dns.conf`
with `DNS=8.8.8.8 1.1.1.1, FallbackDNS=10.0.20.201`. Without it,
systemd-resolved only consulted Technitium (link-level), which
returns NXDOMAIN for `forgejo.viktorbarzin.me` — kubelet pulls from
the Forgejo registry then failed DNS until I patched it manually
on node5.
- k8s apt repo bumped v1.32 → v1.34 (matches cluster).
- The containerd setup script now creates hosts.toml for forgejo,
quay, registry.k8s.io in addition to docker.io + ghcr.io. node3/4
had these added by hand post-bootstrap; now they're baked in.
- `config_path` sed matches both `""` (containerd v1) and `''`
(containerd v2.x). Without the v2 match, the certs.d mirror dir was
silently ignored.
- `proxmox-csi` node map adds k8s-node5 + k8s-node6 entries so CSI
topology labels (region/zone, max-volume-attachments=28) apply on
next `tg apply`.
- `stacks/infra/main.tf` shed the 160-line inline containerd setup
heredoc — that whole thing now lives in the module as a .sh file.
Known unsolved gaps (deferred):
- iscsid restart hangs ~90s on first boot before SIGKILL releases it
(systemd-resolved restart kicks iscsid via dependency). Adds wall-
clock time but doesn't block the join.
- `provision-k8s-worker` doesn't run `tg apply` on `proxmox-csi`
afterward, so the CSI topology labels need a manual apply after
the node joins. Solving cleanly needs the CSI map to derive from
`kubectl get nodes` instead of a static local — separate work.
- `var.containerd_config_update_command` is now ignored when
is_k8s_template=true (replaced by the bundled .sh file). Variable
kept with a deprecation note to avoid breaking other call sites.
E2E proof: k8s-node6 (VMID 206) boots hands-off from
`provision-k8s-worker k8s-node6 206 10.0.20.106` and appears as
`kubectl get nodes …Ready` ~7 min later (most of which is the apt
package_upgrade — separate optimization).
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
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