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feat: Persist K3s cluster

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This commit is contained in:
Jan-Bulthuis 2026-04-04 12:03:51 +02:00
parent cf4c179fc4
commit a61e56c104
1 changed files with 5 additions and 54 deletions
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59
hosts/vm-k1s/configuration.nix
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@ -28,7 +28,7 @@
# Include NFS client module # Include NFS client module
boot.supportedFilesystems = [ "nfs" ]; boot.supportedFilesystems = [ "nfs" ];
# Set up K3S cluster with CoreDNS and FluxCD # Set up K3S cluster with CoreDNS, FluxCD and Cilium
services.k3s = { services.k3s = {
enable = true; enable = true;
extraFlags = [ extraFlags = [
@ -52,26 +52,12 @@
sops-decrypt-key = { sops-decrypt-key = {
source = config.sops.secrets."flux/sops-decrypt-key".path; source = config.sops.secrets."flux/sops-decrypt-key".path;
}; };
# "0-secrets-backup-namespaces" = {
# source = "/opt/k3s-secrets-backup/namespaces.yaml";
# };
# "1-secrets-backup" = {
# source = "/opt/k3s-secrets-backup/secrets.yaml";
# };
# TODO: Move to flux config, once it is possible to easily install flux without CNI
cilium-secrets-namespace = {
content = {
apiVersion = "v1";
kind = "Namespace";
metadata.name = "cilium-secrets";
};
};
# TODO: Move to flux config, once it is possible to easily install flux without CNI # TODO: Move to flux config, once it is possible to easily install flux without CNI
gateway-api = gateway-api =
let let
manifest = pkgs.fetchurl { manifest = pkgs.fetchurl {
url = "https://github.com/kubernetes-sigs/gateway-api/releases/download/v1.4.1/experimental-install.yaml"; url = "https://github.com/kubernetes-sigs/gateway-api/releases/download/v1.4.1/experimental-install.yaml";
hash = "sha256-08IN1MBDGTZWemkXypMfbc7RMQJCvmK57KB72YkuICU="; hash = "sha256-VTMn4P8yoaK+RGv5OCPIQTz5JTrGptVAfuvR6NJp9p4=";
}; };
in in
{ {
@ -157,8 +143,8 @@
cilium = { cilium = {
name = "cilium"; name = "cilium";
repo = "oci://quay.io/cilium/charts/cilium"; repo = "oci://quay.io/cilium/charts/cilium";
version = "1.18.6"; version = "1.18.8";
hash = "sha256-+yr38lc5X1+eXCFE/rq/K0m4g/IiNFJHuhB+Nu24eUs="; hash = "sha256-z1aDpWttEfQ+Af/l0Lxdafasm75QysRc8h7sPhWXr94=";
createNamespace = true; createNamespace = true;
targetNamespace = "cilium-system"; targetNamespace = "cilium-system";
values = { values = {
@ -244,44 +230,9 @@
}; };
}; };
# Backup secrets to avoid reissueing them
modules.impermanence.directories = [ modules.impermanence.directories = [
"/opt/k3s-secrets-backup" "/var/lib/rancher/k3s"
]; ];
systemd.timers.k3s-secrets-backup-timer = {
wantedBy = [ "timers.target" ];
timerConfig = {
OnBootSec = "15m";
OnUnitActiveSec = "1h";
Unit = "k3s-secrets-backup.service";
};
};
systemd.services.k3s-secrets-backup = {
script = ''
mkdir -p /opt/k3s-secrets-backup
touch /opt/k3s-secrets-backup/secrets.yaml
touch /opt/k3s-secrets-backup/namespaces.yaml
chmod 600 /opt/k3s-secrets-backup/secrets.yaml
chmod 600 /opt/k3s-secrets-backup/namespaces.yaml
${pkgs.k3s}/bin/kubectl get secrets -A -l controller.cert-manager\.io/fao=="true" -oyaml | ${pkgs.kubectl-neat}/bin/kubectl-neat > /opt/k3s-secrets-backup/secrets.yaml
echo "apiVersion: v1
kind: List
items:" > /opt/k3s-secrets-backup/namespaces.yaml
${pkgs.gnugrep}/bin/grep -oP '\snamespace: \K.*' /opt/k3s-secrets-backup/secrets.yaml | sort -u | while read -r ns; do
echo "- apiVersion: v1
kind: Namespace
metadata:
name: $ns"
done >> /opt/k3s-secrets-backup/namespaces.yaml
'';
serviceConfig = {
Type = "oneshot";
User = "root";
};
};
environment.variables = { environment.variables = {
KUBECONFIG = "/etc/rancher/k3s/k3s.yaml"; KUBECONFIG = "/etc/rancher/k3s/k3s.yaml";