homelab-infra/platform/gitea-runner/README.md

Gitea Actions runner

This is the bootstrap runner for Gitea Actions. One persistent runner Pod accepts up to four jobs; each job runs in a dynamically created container inside a rootless Docker-in-Docker daemon. Rootless DinD still requires a privileged Pod to create its user namespace, so this runner is restricted to this repository and trusted workflows.

The runner registration token is authoritative in OpenBao at kv/k8s/gitea-runner. External Secrets Operator projects its token property to the gitea-runner-token Secret. Never put the token in this directory or a Helm command line.

Review-first bootstrap

This is a one-time manual deployment because Flux is not installed yet:

1. Merge the reviewed PR.

2. Create a repository-scoped runner registration token in Gitea.

3. Store it as the token property at kv/k8s/gitea-runner without exposing it in shell history:

   read -rsp 'Runner token: ' runner_token
   printf '%s' "$runner_token" | bao kv put kv/k8s/gitea-runner token=-
   unset runner_token
   

4. From the updated main, create the namespace and ExternalSecret, then wait for SecretSynced=True:

   KUBECONFIG="$HOME/.kube/config" k3s kubectl apply \
     -f platform/gitea-runner/namespace.yaml
   KUBECONFIG="$HOME/.kube/config" k3s kubectl apply \
     -f platform/gitea-runner/external-secret.yaml
   KUBECONFIG="$HOME/.kube/config" k3s kubectl wait \
     --namespace gitea-actions \
     --for=condition=Ready externalsecret/gitea-runner-token \
     --timeout=60s
   

5. Install chart actions version 0.1.1 from https://dl.gitea.com/charts/ with this values.yaml:

   helm repo add gitea-charts https://dl.gitea.com/charts/
   helm repo update gitea-charts
   helm upgrade --install gitea-actions gitea-charts/actions \
     --namespace gitea-actions \
     --version 0.1.1 \
     --values platform/gitea-runner/values.yaml \
     --wait --timeout 10m
   

6. Confirm the runner is online, then re-run the queued lint workflow.

Do not deploy from an unmerged feature branch. Do not use --set for the token.

The 1 GiB PVC preserves .runner identity. Docker image layers are ephemeral; the Pod has a 20 GiB ephemeral-storage limit. Terraform apply jobs must use a workflow concurrency group because runner capacity does not serialize access to a shared state.