example.hcl

# There can only be a single job definition per file. This job is named
# "example" so it will create a job with the ID and Name "example".
job "example" {
  # Run the job in the global region, which is the default.
  # region = "global"

  # Specify the datacenters within the region this job can run in.
  datacenters = ["dc1"]

  # Service type jobs optimize for long-lived services. This is
  # the default but we can change to batch for short-lived tasks.
  # type = "service"

  # Priority controls our access to resources and scheduling priority.
  # This can be 1 to 100, inclusively, and defaults to 50.
  # priority = 50

  # Restrict our job to only linux. We can specify multiple constraints
  # as needed.
   constraint {
     attribute = "${attr.kernel.name}"
     value     = "darwin"
   }

  # Configure the job to do rolling updates
  update {
    # Stagger updates every 10 seconds
    stagger = "10s"

    # Update a single task at a time
    max_parallel = 1
  }

  # Create a 'cache' group. Each task in the group will be scheduled
  # onto the same machine.
  group "cache" {
    # Control the number of instances of this group. Defaults to 1.
    # count = 1

    # Configure the restart policy for the task group. If not provided, a
    # default is used based on the job type.
    restart {
      # The number of attempts to run the job within the specified interval.
      attempts = 10
      interval = "5m"

      # A delay between a task failing and a restart occurring.
      delay = "25s"

      # Mode controls what happens when a task has restarted "attempts"
      # times within the interval. "delay" mode delays the next restart
      # till the next interval. "fail" mode does not restart the task if
      # "attempts" has been hit within the interval.
      mode = "delay"
    }

    # Define a task to run
    task "redis" {
      # Use Docker to run the task.
      driver = "raw_exec"

      # Configure Docker driver with the image
      config {
        command = "/usr/bin/nc"
        args = ["-l", "127.0.0.1", "6379"]
      }

      # We must specify the resources required for this task to ensure
      # it runs on a machine with enough capacity.
      resources {
        cpu    = 500 # 500 MHz
        memory = 256 # 256MB
        network {
          mbits = 10
          port "db" {}
        }
      }

      # The artifact block can be specified one or more times to download
      # artifacts prior to the task being started. This is convenient for
      # shipping configs or data needed by the task.
      # artifact {
      #   source = "http://foo.com/artifact.tar.gz"
      #   options {
      #     checksum = "md5:c4aa853ad2215426eb7d70a21922e794"
      #   }
      # }

      # Specify configuration related to log rotation
      # logs {
      #   max_files     = 10
      #   max_file_size = 15
      # }

      # Controls the timeout between signalling a task it will be killed
      # and killing the task. If not set a default is used.
      # kill_timeout = "20s"
    }
  }
}