added keepalived for traefik failover

core/docker-compose.yml

@@ -80,6 +80,22 @@ services:
       - ansible_external
       - dns_external
       - homepage_external
+  keepalived:
+    image: osixia/keepalived:latest
+    container_name: keepalived
+    restart: unless-stopped
+    # Must run on host network to manage the interface IP
+    network_mode: host
+    cap_add:
+      - NET_ADMIN
+      - NET_BROADCAST
+      - NET_RAW
+    environment:
+      - KEEPALIVED_INTERFACE=eth0 # Check if your LXC interface is eth0
+      - KEEPALIVED_ROUTER_ID=51
+      - KEEPALIVED_VIRTUAL_IPS=172.16.201.2/24 # THE FLOATING IP
+      - KEEPALIVED_PRIORITY=${KEEPALIVED_PRIORITY} # 150 for Master, 100 for Backup
+      - KEEPALIVED_PASSWORD=${DNS_ADMIN_PASSWORD}
 
 networks:
   guac_external: