🔧 (headscale): Don't overwrite config if it already exists

Envs are still suggested, but not required anymore

charts/headscale/Chart.yaml

@@ -27,4 +27,4 @@ sources:
 annotations:
   artifacthub.io/changes: |-
     - kind: changed
-      description: Replace PNG icon with SVG
+      description: Don't overwrite config if already exists. Envs are still suggested, but not required anymore.

charts/headscale/README.md

@@ -79,7 +79,7 @@ Headscale runs in a distroless Docker container, which does not have any of the
 expected command line utilities. This keeps the container small and minimizes the possibility of CVEs,
 but it makes working with a config file in Kubernetes more difficult.
 
-To keep config simple, this Helm chart opts to use environment variables.
+To keep config simple, this Helm chart suggests using environment variables.
 All of the Headscale config variables are supported as envs, but official documentation is lacking.
 
 To configure Headscale:

charts/headscale/README_CONFIG.md.gotmpl

@@ -9,7 +9,7 @@ Headscale runs in a distroless Docker container, which does not have any of the
 expected command line utilities. This keeps the container small and minimizes the possibility of CVEs,
 but it makes working with a config file in Kubernetes more difficult.
 
-To keep config simple, this Helm chart opts to use environment variables.
+To keep config simple, this Helm chart suggests using environment variables.
 All of the Headscale config variables are supported as envs, but official documentation is lacking.
 
 To configure Headscale:

charts/headscale/templates/common.yaml

@@ -14,17 +14,22 @@ initContainers:
       - sh
       - -c
       - |
-        cat <<'EOF' >/etc/headscale/config.yaml
-        # Please use environment variables to configure Headscale.
-        # For config reference, see https://github.com/juanfont/headscale/blob/main/config-example.yaml
-        # To configure any of these as an env:
-        #   1. Flatten object keys using "_"
-        #   2. Prefix with "HEADSCALE_"
-        #
-        # For example:
-        #   - "listen_addr" becomes "HEADSCALE_LISTEN_ADDR"
-        #   - "log.level" becomes "HEADSCALE_LOG_LEVEL"
+        if [[ -f '/etc/headscale/config.yaml' ]]; then
+          echo 'Config already exists' >&2
+        else
+          echo 'Writing empty config' >&2
+          cat <<- 'EOF' >/etc/headscale/config.yaml
+            # It's suggested to use environment variables to configure Headscale.
+            # For config reference, see https://github.com/juanfont/headscale/blob/main/config-example.yaml
+            # To configure any of these as an env:
+            #   1. Flatten object keys using "_"
+            #   2. Prefix with "HEADSCALE_"
+            #
+            # For example:
+            #   - "listen_addr" becomes "HEADSCALE_LISTEN_ADDR"
+            #   - "log.level" becomes "HEADSCALE_LOG_LEVEL"
         EOF
+        fi
 
 env:
   {{- with .Values.ingress.main }}