nginx-upstreams.json5

/*
This example demonstrates how a user can watch external dependencies via
'watches' and have jobs respond to changes in those dependencies.
*/
{
  consul: "localhost:8500", // ContainerPilot talks 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"
      }
    },
    {
      // this job is not advertised and has no health check. we'll never
      // see a 'preStart healthy' event, just 'preStart exitSuccess'
      name: "preStart",
      exec: [
        "consul-template", "-once", "-consul-addr", "localhost:8500",
        "-template", "/etc/template.ctmpl:/etc/nginx/conf.d/site.conf"
      ],
      when: {
        source: "consul-agent",
        once: "healthy"
      }
    },
    {
      name: "onChange-app",
      exec: [
        "consul-template", "-once", "-consul-addr", "localhost:8500",
        "-template", "/etc/template.ctmpl:/etc/nginx/conf.d/site.conf"
      ],
      when: {
        // this event will be received whenever the watch for 'app'
        // sees a change in Consul.
        source: "watch.app",
        each: "changed"
      }
    },
    {
      name: "nginx",
      exec: "nginx",
      port: 80,
      restarts: "unlimited",
      when: {
        // 'app' won't start until the 'preStart' has succeeeded, but we
        // give up after 120 seconds
        source: "preStart",
        once: "exitSuccess"
        timeout: "120s"
      },
      health: {
        exec: "/usr/bin/curl --fail -s -o /dev/null http://localhost:80/health",
        interval: 5,
        ttl: 10
        timeout: "10s" // the health check can have its own timeout
      }
    }
  ],
  watches: [
    {
      // this watch will fire the following events:
      // - 'watch.app changed' when there's a change in Consul
      // - 'watch.app healthy' when app changes to being healthy
      // - 'watch.app unhealthy' when app changes to being unhealthy
      name: "app",
      interval: 5
    }
  ]
}