Add Zabbix Docker Compose config, fix agent hostname

Set AGENT_HOSTNAME=AgapHost to match the existing host in Zabbix server
(was agap-server, causing "host not found" errors).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

zabbix/.env

@@ -0,0 +1,12 @@
+# Zabbix web frontend
+WEB_PORT=81
+PHP_TZ=Europe/Amsterdam
+
+# Agent
+AGENT_HOSTNAME=AgapHost
+
+# PostgreSQL
+POSTGRES_DATA_DIR=/mnt/ssd/dbs/zabbix
+POSTGRES_USER=zabbix
+POSTGRES_PASSWORD=fefwG11UAFfs110
+POSTGRES_DB=zabbix

zabbix/docker-compose.yml

@@ -0,0 +1,99 @@
+services:
+  postgres-server:
+    image: postgres:16-alpine
+    restart: unless-stopped
+    volumes:
+      - ${POSTGRES_DATA_DIR}:/var/lib/postgresql/data
+    environment:
+      POSTGRES_USER: ${POSTGRES_USER}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_DB: ${POSTGRES_DB}
+    networks:
+      - database
+    stop_grace_period: 1m
+
+  zabbix-server:
+    image: zabbix/zabbix-server-pgsql:ubuntu-7.4-latest
+    restart: unless-stopped
+    ports:
+      - "10051:10051"
+    environment:
+      DB_SERVER_HOST: postgres-server
+      DB_SERVER_PORT: 5432
+      POSTGRES_USER: ${POSTGRES_USER}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_DB: ${POSTGRES_DB}
+    volumes:
+      - /etc/localtime:/etc/localtime:ro
+    ulimits:
+      nproc: 65535
+      nofile:
+        soft: 20000
+        hard: 40000
+    depends_on:
+      - postgres-server
+    networks:
+      - database
+      - backend
+      - frontend
+    stop_grace_period: 30s
+
+  zabbix-web:
+    image: zabbix/zabbix-web-apache-pgsql:ubuntu-7.4-latest
+    restart: unless-stopped
+    ports:
+      - "${WEB_PORT}:8080"
+    environment:
+      ZBX_SERVER_HOST: zabbix-server
+      ZBX_SERVER_PORT: 10051
+      DB_SERVER_HOST: postgres-server
+      DB_SERVER_PORT: 5432
+      POSTGRES_USER: ${POSTGRES_USER}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+      POSTGRES_DB: ${POSTGRES_DB}
+      PHP_TZ: ${PHP_TZ}
+    volumes:
+      - /etc/localtime:/etc/localtime:ro
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:8080/ping"]
+      interval: 1m30s
+      timeout: 3s
+      retries: 3
+      start_period: 40s
+      start_interval: 5s
+    depends_on:
+      - postgres-server
+      - zabbix-server
+    networks:
+      - database
+      - backend
+      - frontend
+    stop_grace_period: 10s
+
+  zabbix-agent:
+    image: zabbix/zabbix-agent:ubuntu-7.4-latest
+    restart: unless-stopped
+    environment:
+      ZBX_HOSTNAME: ${AGENT_HOSTNAME}
+      ZBX_SERVER_HOST: zabbix-server
+      ZBX_SERVER_ACTIVE: zabbix-server
+      ZBX_STARTAGENTS: "0"
+    volumes:
+      - /etc/localtime:/etc/localtime:ro
+    privileged: true
+    pid: host
+    depends_on:
+      - zabbix-server
+    networks:
+      - backend
+    stop_grace_period: 5s
+
+networks:
+  frontend:
+    driver: bridge
+  backend:
+    driver: bridge
+    internal: true
+  database:
+    driver: bridge
+    internal: true