database-config.json5

/*
This example demonstrates how a user might configure multiple database
connections with varying requirements.

'app' is a Node.js application that has a hard dependency on 'mysql';
it will fail to start if there's no 'mysql' connection. It has a soft
dependency on 'redis'; it can handle a missing redis gracefully.
*/
{
  consul: "localhost:8500", // ContainerPilot will talk to the local agent
  jobs: [
    {
      // this job has no 'port' configuration so it will not be
      // advertised to the Consul server. note there's no 'when' field
      // so this will start on the 'global startup' event by default.
      name: "consul-agent",
      exec: [
        "consul", "agent", "-rejoin", "-retry-join", "{{ .CONSUL }}",
        "-retry-max", "10", "-retry-interval", "10s"
      ],
      restarts: "unlimited",
      health: {
        exec: "consul info | grep leader"
      }
    },
    {
      name: "configure-db",
      exec: [
        "consul-template", "-once", "-consul-addr", "localhost:8500",
        "-template", "/etc/template.ctmpl:/etc/app.conf"
      ],
      when: {
        // this job won't fire until mysql is healthy
        source: "watch.mysql",
        once: "healthy"
      }
    },
    {
      name: "configure-redis",
      exec: [
        "consul-template", "-once", "-consul-addr", "localhost:8500",
        "-template", "'/etc/template.ctmpl:/etc/app.conf:pkill -SIGHUP node'"
      ],
      when: {
        // this job will fire whenever redis changes
        source: "watch.redis",
        each: "changed"
      }
    },
    {
      name: "app",
      exec: "node server.js -p 8000",
      port: 8000,
      restarts: "unlimited",
      when: {
        // 'app' won't start until the 'configure-db' has succeeeded
        source: "configure-db",
        once: "exitSuccess"
      },
      health: {
        exec: "/usr/bin/curl --fail -s -o /dev/null http://localhost:8000",
        interval: 5,
        ttl: 10
      }
    }
  ],
  watches: [
    {
      name: "mysql",
      interval: 5
    },
    {
      name: "redis",
      interval: 5
    }
  ]
}