Move Pi-hole backup node from Serenity to NOMAD

pihole/nomad/docker-compose.yaml

@@ -0,0 +1,62 @@
+services:
+  unbound:
+    image: mvance/unbound:latest
+    container_name: unbound-pihole-nomad
+    network_mode: host
+    restart: unless-stopped
+    environment:
+      TZ: ${TZ}
+      UNBOUND_PORT: "5335"
+    volumes:
+      - ${APPDATA_UNBOUND_ROOT}:/opt/unbound/etc/unbound/
+    healthcheck:
+      test: ["CMD-SHELL", "hex=$$(printf '%04X' \"$$UNBOUND_PORT\"); grep -qi \":$$hex\" /proc/net/tcp /proc/net/tcp6 || exit 1"]
+      interval: 30s
+      timeout: 10s
+      retries: 6
+      start_period: 20s
+
+  pihole:
+    image: pihole/pihole:latest
+    container_name: pihole-nomad
+    network_mode: host
+    restart: unless-stopped
+    depends_on:
+      unbound:
+        condition: service_healthy
+    environment:
+      TZ: ${TZ}
+      PIHOLE_WEB_PORT: ${NOMAD_PIHOLE_WEB_PORT}
+      FTLCONF_webserver_api_password: ${PIHOLE_PASSWORD}
+      FTLCONF_dns_listeningMode: "LOCAL"
+      FTLCONF_dns_upstreams: "127.0.0.1#5335"
+      FTLCONF_webserver_port: ${NOMAD_PIHOLE_WEB_PORT}
+      FTLCONF_ntp_ipv4_active: "false"
+      FTLCONF_ntp_ipv6_active: "false"
+      FTLCONF_ntp_sync_active: "false"
+    volumes:
+      - ${APPDATA_PIHOLE_ROOT}/etc-pihole:/etc/pihole
+      - ${APPDATA_PIHOLE_ROOT}/etc-dnsmasq.d:/etc/dnsmasq.d
+    cap_add:
+      - SYS_NICE
+    healthcheck:
+      test: ["CMD-SHELL", "hex=$$(printf '%04X' \"$$PIHOLE_WEB_PORT\"); grep -qi \":$$hex\" /proc/net/tcp /proc/net/tcp6 || exit 1"]
+      interval: 30s
+      timeout: 10s
+      retries: 6
+      start_period: 40s
+
+  keepalived:
+    image: osixia/keepalived:2.0.20
+    container_name: keepalived-pihole-nomad
+    network_mode: host
+    restart: unless-stopped
+    depends_on:
+      pihole:
+        condition: service_healthy
+    cap_add:
+      - NET_ADMIN
+      - NET_BROADCAST
+      - NET_RAW
+    volumes:
+      - ./keepalived.conf:/usr/local/etc/keepalived/keepalived.conf:ro