feat(aggregation-mode): integrate auto failover to the docker compose

aggregation_mode/docker-compose.yaml

@@ -1,3 +1,22 @@
+# Shared base configuration for Postgres nodes. Avoids duplication and keeps all nodes consistent.
+# Note: This is a template, not a service.
+x-node: &node
+  image: citusdata/pg_auto_failover:v2.0-pg14
+  volumes:
+    - /var/lib/postgres
+  environment:
+    PGDATA: /var/lib/postgres/pgaf
+    PGUSER: tutorial
+    PGDATABASE: tutorial
+    PG_AUTOCTL_HBA_LAN: true
+    PG_AUTOCTL_AUTH_METHOD: "trust"
+    PG_AUTOCTL_SSL_SELF_SIGNED: true
+    PG_AUTOCTL_MONITOR: "postgresql://autoctl_node@monitor/pg_auto_failover"
+  expose:
+    - 5432
+  networks:
+    - aligned-network
+
 volumes:
   postgres_data:
 
@@ -31,3 +50,41 @@ services:
       - 8090:8080
     networks:
       - aligned-network
+
+  monitor:
+    image: citusdata/pg_auto_failover:v2.0-pg14
+    volumes:
+      - /var/lib/postgres
+    environment:
+      PGDATA: /var/lib/postgres/pgaf
+      PG_AUTOCTL_SSL_SELF_SIGNED: true
+    ports:
+      - "5436:5432"
+    command: |
+      pg_autoctl create monitor --auth trust --run
+    networks:
+      - aligned-network
+
+  node1:
+    <<: *node
+    hostname: node1
+    command: >
+      pg_autoctl create postgres
+      --name node1
+      --ssl-self-signed
+      --ssl-mode require
+      --auth trust
+      --pg-hba-lan
+      --run
+
+  node2:
+    <<: *node
+    hostname: node2
+    command: >
+      pg_autoctl create postgres
+      --name node2
+      --ssl-self-signed
+      --ssl-mode require
+      --auth trust
+      --pg-hba-lan
+      --run

docker-compose.yaml

@@ -1,3 +1,7 @@
+networks:
+  aligned-network:
+    name: aligned-network
+
 services:
 
   localstack: