Add Shadowsocks deployment on spb with Vaultwarden credentials

k8s-ng/apps/shadowsocks/README.md

@@ -0,0 +1,18 @@
+# Shadowsocks on spb
+
+One shadowsocks-rust pod runs on `spb`, exposing `8388/TCP` and `8388/UDP`
+through host ports. Client settings:
+
+- Server: `spb.hexor.cy`
+- Port: `8388`
+- Method: `chacha20-ietf-poly1305`
+- Password: the `Password` custom field of the Vaultwarden item named
+  `k8s/shadowsocks/secrets` (exact name, not an item UUID).
+
+Create that item in the server secrets vault accessible to the External Secrets
+bot. Use a long random password, for example generated with `openssl rand -base64 32`.
+External Secrets creates `shadowsocks-config`; Reloader restarts the deployment
+when the Secret changes. No persistent storage is required.
+
+The spb NixOS configuration opens port 8388 for both protocols. Apply that
+configuration when deploying this application for the first time.

k8s-ng/apps/shadowsocks/deployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: shadowsocks
+  annotations:
+    reloader.stakater.com/auto: "true"
+  labels:
+    app: shadowsocks
+spec:
+  replicas: 1
+  strategy:
+    type: Recreate
+  selector:
+    matchLabels:
+      app: shadowsocks
+  template:
+    metadata:
+      labels:
+        app: shadowsocks
+    spec:
+      nodeSelector:
+        kubernetes.io/hostname: spb
+      automountServiceAccountToken: false
+      securityContext:
+        runAsNonRoot: true
+        runAsUser: 65534
+        runAsGroup: 65534
+        seccompProfile:
+          type: RuntimeDefault
+      containers:
+        - name: shadowsocks
+          # shadowsocks-rust v1.25.0; multi-arch image includes linux/arm64.
+          image: ghcr.io/shadowsocks/ssserver-rust:v1.25.0@sha256:22240c07d8ce3a36421ede770bd775dcc5fc56d5d829943196957b05452dc36f
+          imagePullPolicy: IfNotPresent
+          command: ["/usr/bin/ssserver"]
+          args:
+            - --log-without-time
+            - -c
+            - /etc/shadowsocks-rust/config.json
+          ports:
+            - name: proxy-tcp
+              containerPort: 8388
+              hostPort: 8388
+              protocol: TCP
+            - name: proxy-udp
+              containerPort: 8388
+              hostPort: 8388
+              protocol: UDP
+          readinessProbe:
+            tcpSocket:
+              port: proxy-tcp
+          resources:
+            requests:
+              cpu: 50m
+              memory: 32Mi
+            limits:
+              memory: 256Mi
+          securityContext:
+            allowPrivilegeEscalation: false
+            readOnlyRootFilesystem: true
+            capabilities:
+              drop: ["ALL"]
+          volumeMounts:
+            - name: config
+              mountPath: /etc/shadowsocks-rust
+              readOnly: true
+      volumes:
+        - name: config
+          secret:
+            secretName: shadowsocks-config
+            defaultMode: 0444

k8s-ng/apps/shadowsocks/external-secrets.yaml

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+apiVersion: external-secrets.io/v1
+kind: ExternalSecret
+metadata:
+  name: shadowsocks-config
+spec:
+  refreshInterval: 1h
+  secretStoreRef:
+    name: vaultwarden-fields
+    kind: ClusterSecretStore
+  target:
+    name: shadowsocks-config
+    creationPolicy: Owner
+    deletionPolicy: Retain
+    template:
+      type: Opaque
+      data:
+        config.json: |
+          {
+            "server": "0.0.0.0",
+            "server_port": 8388,
+            "method": "chacha20-ietf-poly1305",
+            "password": {{ .password | toJson }},
+            "mode": "tcp_and_udp"
+          }
+  data:
+    - secretKey: password
+      remoteRef:
+        key: k8s/shadowsocks/secrets
+        property: Password

k8s-ng/apps/shadowsocks/kustomization.yaml

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+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+namespace: shadowsocks
+resources:
+  - external-secrets.yaml
+  - deployment.yaml

k8s-ng/core-state/values.yaml

@@ -114,3 +114,9 @@ apps:
     namespace: rustdesk
     wave: 6
     skipDryRunOnMissingResource: true
+  - name: shadowsocks
+    project: apps
+    path: k8s-ng/apps/shadowsocks
+    namespace: shadowsocks
+    wave: 6
+    skipDryRunOnMissingResource: true