Added amnezia exporter

k8s/apps/amnezia/configmap-scripts.yaml

@@ -128,6 +128,9 @@ data:
     SERVER_CONFIG="/etc/amnezia/server/awg0.conf"
     CLIENTS_DIR="/etc/amnezia/clients"
     RUNTIME_CONFIG="/run/amnezia/awg0.conf"
+    SYNC_CONFIG="/run/amnezia/awg0.sync.conf"
+    STATUS_FILE="/run/amnezia/reload-status"
+    RELOAD_INTERVAL="${AMNEZIAWG_RELOAD_INTERVAL:-10}"
 
     cleanup() {
       if awg show awg0 >/dev/null 2>&1; then
@@ -137,32 +140,125 @@ data:
 
     render_config() {
       mkdir -p "$(dirname "${RUNTIME_CONFIG}")"
-      cp "${SERVER_CONFIG}" "${RUNTIME_CONFIG}"
-      chmod 0600 "${RUNTIME_CONFIG}"
+      local tmp_config="${RUNTIME_CONFIG}.tmp"
+      cp "${SERVER_CONFIG}" "${tmp_config}"
+      chmod 0600 "${tmp_config}"
 
       local clients_found=0
       for client_config in "${CLIENTS_DIR}"/*; do
         [ -f "${client_config}" ] || continue
         [ -s "${client_config}" ] || continue
-        printf '\n' >> "${RUNTIME_CONFIG}"
-        cat "${client_config}" >> "${RUNTIME_CONFIG}"
+        printf '\n' >> "${tmp_config}"
+        cat "${client_config}" >> "${tmp_config}"
         clients_found=1
       done
 
       if [ "${clients_found}" = "0" ]; then
         echo "No client peer configs found in ${CLIENTS_DIR}; starting without peers"
       fi
+
+      mv "${tmp_config}" "${RUNTIME_CONFIG}"
+      chmod 0600 "${RUNTIME_CONFIG}"
+    }
+
+    client_config_hash() {
+      {
+        for client_config in "${CLIENTS_DIR}"/*; do
+          [ -f "${client_config}" ] || continue
+          sha256sum "${client_config}"
+        done
+      } | sha256sum | awk '{print $1}'
+    }
+
+    write_reload_status() {
+      local state="${1}"
+      local hash="${2:-}"
+      local applied_at_ms=""
+      if [ "${state}" = "applied" ]; then
+        applied_at_ms="$(($(date +%s) * 1000))"
+      fi
+
+      mkdir -p "$(dirname "${STATUS_FILE}")"
+      {
+        printf 'state=%s\n' "${state}"
+        printf 'hash=%s\n' "${hash}"
+        printf 'applied_at_ms=%s\n' "${applied_at_ms}"
+      } > "${STATUS_FILE}.tmp"
+      mv "${STATUS_FILE}.tmp" "${STATUS_FILE}"
+    }
+
+    apply_live_config() {
+      render_config
+      awg-quick strip "${RUNTIME_CONFIG}" > "${SYNC_CONFIG}"
+      chmod 0600 "${SYNC_CONFIG}"
+      awg syncconf awg0 "${SYNC_CONFIG}"
+    }
+
+    watch_client_config() {
+      local last_hash="${1}"
+      while true; do
+        sleep "${RELOAD_INTERVAL}" &
+        wait "$!" || return 0
+
+        local current_hash
+        current_hash="$(client_config_hash)"
+        if [ "${current_hash}" = "${last_hash}" ]; then
+          continue
+        fi
+
+        echo "Detected AmneziaWG client peer config change; applying with awg syncconf"
+        if apply_live_config; then
+          last_hash="${current_hash}"
+          write_reload_status applied "${current_hash}"
+          awg show awg0 || true
+        else
+          echo "ERROR: failed to hot-reload AmneziaWG client peer config" >&2
+          write_reload_status error "${current_hash}"
+        fi
+      done
     }
 
     trap cleanup EXIT
     trap 'exit 0' TERM INT
 
+    initial_hash="$(client_config_hash)"
     render_config
     cleanup
     awg-quick up "${RUNTIME_CONFIG}"
     awg show awg0 || true
+    write_reload_status applied "${initial_hash}"
+    watch_client_config "${initial_hash}"
+
+  status-patch.sh: |
+    #!/usr/bin/env bash
+    set -euo pipefail
+
+    STATUS_FILE="/run/amnezia/reload-status"
+    PATCH_INTERVAL="${AMNEZIAWG_STATUS_PATCH_INTERVAL:-5}"
+    NAMESPACE="${POD_NAMESPACE:-$(cat /var/run/secrets/kubernetes.io/serviceaccount/namespace)}"
+    : "${POD_NAME:?POD_NAME is required}"
+
+    last_file_hash=""
+
+    patch_status() {
+      local state="unknown"
+      local hash=""
+      local applied_at_ms=""
+
+      # The file is generated by run.sh and contains only shell assignments.
+      # shellcheck disable=SC1090
+      source "${STATUS_FILE}"
+
+      kubectl patch pod "${POD_NAME}" -n "${NAMESPACE}" --type merge -p "{\"metadata\":{\"annotations\":{\"amnezia-fellow.hexor.cy/client-secret-reload-status\":\"${state}\",\"amnezia-fellow.hexor.cy/client-secret-applied-at-ms\":\"${applied_at_ms}\",\"amnezia-fellow.hexor.cy/client-secret-applied-hash\":\"${hash}\"}}}"
+    }
 
     while true; do
-      sleep 3600 &
-      wait "$!"
+      if [ -f "${STATUS_FILE}" ]; then
+        file_hash="$(sha256sum "${STATUS_FILE}" | awk '{print $1}')"
+        if [ "${file_hash}" != "${last_file_hash}" ]; then
+          patch_status || true
+          last_file_hash="${file_hash}"
+        fi
+      fi
+      sleep "${PATCH_INTERVAL}"
     done

k8s/apps/amnezia/daemonset.yaml

@@ -6,8 +6,8 @@ metadata:
   labels:
     app: amneziawg
   annotations:
-    reloader.stakater.com/auto: "true"
-    secret.reloader.stakater.com/reload: "amneziawg-server,amneziawg-clients"
+    secret.reloader.stakater.com/reload: "amneziawg-server"
+    configmap.reloader.stakater.com/reload: "amneziawg-scripts"
 spec:
   selector:
     matchLabels:
@@ -27,6 +27,19 @@ spec:
       tolerations:
         - operator: Exists
       initContainers:
+        - name: install-awg
+          image: amneziavpn/amneziawg-go:latest
+          imagePullPolicy: IfNotPresent
+          command:
+            - /bin/bash
+            - -lc
+            - |
+              set -euo pipefail
+              cp /usr/bin/awg /shared-bin/awg
+              chmod 0755 /shared-bin/awg
+          volumeMounts:
+            - name: awg-bin
+              mountPath: /shared-bin
         - name: register-endpoint
           image: bitnami/kubectl:latest
           imagePullPolicy: IfNotPresent
@@ -123,6 +136,81 @@ spec:
               mountPath: /run/amnezia
             - name: dev-net-tun
               mountPath: /dev/net/tun
+        - name: reload-status
+          image: bitnami/kubectl:latest
+          imagePullPolicy: IfNotPresent
+          env:
+            - name: POD_NAME
+              valueFrom:
+                fieldRef:
+                  fieldPath: metadata.name
+          command:
+            - /bin/bash
+            - /scripts/status-patch.sh
+          resources:
+            requests:
+              memory: "32Mi"
+              cpu: "10m"
+            limits:
+              memory: "128Mi"
+              cpu: "100m"
+          volumeMounts:
+            - name: scripts
+              mountPath: /scripts
+              readOnly: true
+            - name: runtime-config
+              mountPath: /run/amnezia
+        - name: amneziawg-exporter-redis
+          image: redis:alpine
+          imagePullPolicy: IfNotPresent
+          command:
+            - redis-server
+            - /etc/redis/redis.conf
+          ports:
+            - name: redis
+              containerPort: 6379
+              protocol: TCP
+          resources:
+            requests:
+              memory: "32Mi"
+              cpu: "10m"
+            limits:
+              memory: "128Mi"
+              cpu: "100m"
+          volumeMounts:
+            - name: exporter-redis-config
+              mountPath: /etc/redis
+              readOnly: true
+            - name: exporter-redis-data
+              mountPath: /data
+        - name: amneziawg-exporter
+          image: amneziavpn/amneziawg-exporter:latest
+          imagePullPolicy: IfNotPresent
+          securityContext:
+            capabilities:
+              add:
+                - NET_ADMIN
+          env:
+            - name: AWG_EXPORTER_REDIS_HOST
+              value: "127.0.0.1"
+            - name: AWG_EXPORTER_REDIS_PORT
+              value: "6379"
+          ports:
+            - name: metrics
+              containerPort: 9351
+              protocol: TCP
+          resources:
+            requests:
+              memory: "64Mi"
+              cpu: "25m"
+            limits:
+              memory: "256Mi"
+              cpu: "200m"
+          volumeMounts:
+            - name: awg-bin
+              mountPath: /usr/bin/awg
+              subPath: awg
+              readOnly: true
       volumes:
         - name: server-config
           secret:
@@ -142,6 +230,13 @@ spec:
             defaultMode: 0755
         - name: runtime-config
           emptyDir: {}
+        - name: awg-bin
+          emptyDir: {}
+        - name: exporter-redis-config
+          configMap:
+            name: amneziawg-exporter-redis
+        - name: exporter-redis-data
+          emptyDir: {}
         - name: dev-net-tun
           hostPath:
             path: /dev/net/tun

k8s/apps/amnezia/exporter-redis-configmap.yaml

@@ -0,0 +1,28 @@
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: amneziawg-exporter-redis
+  labels:
+    app: amneziawg
+    component: exporter
+data:
+  redis.conf: |
+    bind 0.0.0.0
+    protected-mode no
+    port 6379
+    tcp-backlog 511
+    timeout 0
+    tcp-keepalive 300
+    daemonize no
+    pidfile /run/redis.pid
+    loglevel warning
+    logfile ""
+    databases 16
+    always-show-logo no
+    set-proc-title no
+    save 3600 1
+    stop-writes-on-bgsave-error no
+    rdbcompression yes
+    rdbchecksum yes
+    dir /data

k8s/apps/amnezia/exporter-service.yaml

@@ -0,0 +1,17 @@
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: amneziawg-exporter
+  labels:
+    app: amneziawg
+    component: exporter
+spec:
+  type: ClusterIP
+  selector:
+    app: amneziawg
+  ports:
+    - name: metrics
+      protocol: TCP
+      port: 9351
+      targetPort: 9351

k8s/apps/amnezia/kustomization.yaml

@@ -12,4 +12,7 @@ resources:
   - fellow-service.yaml
   - fellow-ingress.yaml
   - fellow-deployment.yaml
+  - exporter-redis-configmap.yaml
+  - exporter-service.yaml
+  - servicemonitor.yaml
   - daemonset.yaml

k8s/apps/amnezia/rbac.yaml

@@ -42,6 +42,9 @@ rules:
   - apiGroups: [""]
     resources: ["secrets"]
     verbs: ["get", "create", "patch"]
+  - apiGroups: [""]
+    resources: ["pods"]
+    verbs: ["get", "patch"]
 ---
 apiVersion: rbac.authorization.k8s.io/v1
 kind: RoleBinding

k8s/apps/amnezia/servicemonitor.yaml

@@ -0,0 +1,23 @@
+---
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: amneziawg-exporter
+  labels:
+    app: amneziawg
+    component: exporter
+    release: prometheus
+spec:
+  selector:
+    matchLabels:
+      app: amneziawg
+      component: exporter
+  endpoints:
+    - port: metrics
+      path: /metrics
+      interval: 30s
+      scrapeTimeout: 10s
+      honorLabels: true
+  namespaceSelector:
+    matchNames:
+      - amnezia