feat(derp): optimize the derp chart template

README.md

@@ -1,5 +1,8 @@
-helm charts
+## helm charts
 
+```shell
 helm repo add devcm https://devcm-repo.github.io/helm-charts
+```
 
-pgedge
+### charts
+- tailscale-derp

charts/tailscale-derp/Chart.yaml

@@ -1,13 +1,13 @@
 apiVersion: v2
 name: tailscale-derp
 description: Tailscale DERP Relay Server Helm Chart
-home: https://github.com/sspreitzer/helm-tailscale/tree/main/charts/tailscale-derp
+home: https://devcm-repo.github.io/helm-charts/
 sources:
-  - https://github.com/sspreitzer/helm-tailscale.git
+  - https://github.com/devcm-repo/helm-charts
 maintainers:
   - name: dev.cm
     email: [email protected]
     url: https://github.com/devcm-repo
 icon: https://tailscale.com/files/apple-touch-icon.png
-version: 1.44.0
-appVersion: 1.44.0
+version: 0.0.3
+appVersion: 1.68.0

charts/tailscale-derp/README.md

@@ -5,7 +5,7 @@ This Helm Chart is a Tailscale container deployment for a tailnet relay server (
 ## Installing the Helm Chart
 
 ```shell
-helm repo add tailscale https://spreitzer.ch/helm-tailscale
+helm repo add tailscale https://devcm-repo.github.io/helm-charts
 helm install tailscale-derp tailscale/tailscale-derp
 ```
 
@@ -14,15 +14,10 @@ helm install tailscale-derp tailscale/tailscale-derp
 A working configuration:
 
 ```yaml
-service:
-  annotations:
-    service.beta.kubernetes.io/azure-dns-label-name: my-derp-01
-
-hostname: my-derp-01.switzerlandnorth.cloudapp.azure.com
+hostname: derp.dev.cm
 
 nodeSelector:
-  topology.kubernetes.io/region: switzerlandnorth
-  topology.kubernetes.io/zone: switzerlandnorth-1
+  topology.kubernetes.io/region: cn-hk
 ```
 
 ## Helm Chart Values
@@ -33,6 +28,14 @@ nodeSelector:
 | `image.pullPolicy` | Kubernetes pullPolicy to use for starting the container image. | `IfNotPresent` |
 | `service.type` | Kubernetes Service type. | `LoadBalancer` |
 | `service.annotations` | A map/dict of Kubernetes Service annotations. | `{}` |
-| `hostname` | DERP hostname to use. Must be the same as of the derpMap in the tailnet ACL. | `derp.example.com` |
+| `hostNetwork` | This service will be disabled when hostNetwork is enableds. | `false` |
 | `nodeSelector` | A map/dict of Kubernetes Pod nodeSelector node labels. | `{}` |
+| `extraVolumes` | Extra volumes to add to the deployment. | `[]` |
+| `extraVolumeMounts` | Extra volume mounts to add to the container. Normally used with `extraVolumes`. | `[]` |
 | `affinity` | A map/dict of Kubernetes Pod affinity rules. | `{}` |
+| `derp.hostname` | Derp server hostname. | `'derp.examples.com'` |
+| `derp.verify_clients` | Derp server will enable authentication. | `true` |
+| `derp.certdir` | Start a derper with your own certificate. | `` |
+| `derp.http_port` | The port on which to serve HTTP. Set to -1 to disable. | `80` |
+| `derp.https_port` | The port on which to serve HTTPS. | `443` |
+| `derp.stun_port` | The UDP port on which to serve STUN. | `3478` |

charts/tailscale-derp/templates/deployment.yml

@@ -21,11 +21,54 @@ spec:
       affinity: {{- toYaml .Values.affinity | nindent 8 }}
       {{- end }}
       containers:
-      - name: "{{ .Release.Name }}-{{ .Chart.Name }}"
-        image: "{{ .Values.image.name }}:v{{ .Chart.AppVersion }}"
-        ports:
-        - containerPort: 80
-        - containerPort: 443
-        - containerPort: 3478
-        args:
-        - "--hostname={{ .Values.hostname }}"
+        - name: "{{ .Release.Name }}-{{ .Chart.Name }}"
+          image: "{{ .Values.image.name }}:v{{ .Chart.AppVersion }}"
+          ports:
+            {{- if gt (int .Values.derp.http_port) -1 }}
+            - name: http
+              hostPort: {{ .Values.derp.http_port }}
+              containerPort: {{ .Values.derp.http_port }}
+              protocol: TCP
+            {{- end }}
+            - name: https
+              hostPort: {{ .Values.derp.https_port }}
+              containerPort: {{ .Values.derp.https_port }}
+              protocol: TCP
+            - name: stun
+              hostPort: {{ .Values.derp.stun_port }}
+              containerPort: {{ .Values.derp.stun_port }}
+              protocol: UDP
+          args:
+            - "--hostname={{ .Values.derp.hostname }}"
+            - "--verify-clients={{ .Values.derp.verify_clients }}"
+            {{- if .Values.derp.certdir }}
+            - "--certmode=manual"
+            - "--certdir={{ .Values.derp.certdir }}"
+            {{- end }}
+            {{- if .Values.derp.http_port }}
+            - "--http-port={{ .Values.derp.http_port }}"
+            {{- end }}
+            {{- if .Values.derp.https_port }}
+            - "--a=:{{ .Values.derp.https_port }}"
+            {{- end }}
+            {{- if .Values.derp.stun_port }}
+            - "--stun-port={{ .Values.derp.stun_port }}"
+            {{- end }}
+          volumeMounts:
+            {{- toYaml .Values.extraVolumeMounts | nindent 12 }}
+            {{- if .Values.derp.verify_clients }}
+            - mountPath: /var/run/tailscale/tailscaled.sock
+              name: tailscale-socket
+            {{- end }}
+      {{- if .Values.hostNetwork }}
+      hostNetwork: true
+      {{- end }}
+      volumes:
+        {{- toYaml .Values.extraVolumes | nindent 8 }}
+        {{- if .Values.derp.verify_clients }}
+        - hostPath:
+            path: /run/tailscale/tailscaled.sock
+            type: Socket
+          name: tailscale-socket
+        {{- end }}
+

charts/tailscale-derp/templates/service.yml

@@ -1,3 +1,4 @@
+{{- if not .Values.hostNetwork }}
 apiVersion: v1
 kind: Service
 metadata:
@@ -10,12 +11,16 @@ spec:
   selector:
     app: "{{ .Release.Name }}-{{ .Chart.Name }}"
   ports:
-  - name: http
-    port: 80
-    targetPort: 80
-  - name: https
-    port: 443
-    targetPort: 443
-  - name: stun
-    port: 3478
-    targetPort: 3478
+    {{- if gt (int .Values.derp.http_port) -1 }}
+    - name: http
+      port: {{ .Values.derp.http_port }}
+      targetPort: {{ .Values.derp.http_port }}
+    {{- end }}
+    - name: https
+      port: {{ .Values.derp.https_port }}
+      targetPort: {{ .Values.derp.https_port }}
+    - name: stun
+      port: {{ .Values.derp.stun_port }}
+      targetPort: {{ .Values.derp.stun_port }}
+      protocol: UDP
+{{- end }}

charts/tailscale-derp/values.yaml

@@ -1,12 +1,20 @@
 image:
-  name: docker.io/sspreitzer/tailscale-derp
+  name: docker.io/devcm/tailscale-derp
   pullPolicy: IfNotPresent
 
 service:
-  type: LoadBalancer
+  type: ClusterIP
   annotations: {}
 
-hostname: 'derp.example.com'
+hostNetwork: false
 
 nodeSelector: {}
+
 affinity: {}
+
+derp:
+  hostname: derp.examples.com
+  verify_clients: false
+  http_port: 80
+  https_port: 443
+  stun_port: 3478