Nomad job specification

example.nomad

# There can only be a single job definition per file.
# Create a job with ID and Name 'whereami'
job "whereami" {
	# 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 = "linux"
	}

	# 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 'group' group. Each task in the group will be
	# scheduled onto the same machine.
	group "api" {
		# Control the number of instances of this groups.
		# Defaults to 1
		count = 3

		# 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 "whereami" {
			# Use Docker to run the task.
			driver = "docker"

			# Configure Docker driver with the image
			config {
				image = "duythinht/whereami:v1"
				port_map {
					http = 3000
				}
			}

			service {
				name = "${TASKGROUP}-whereami"
				tags = ["global", "cache"]
				port = "http"
				check {
					name = "alive"
					type = "tcp"
					interval = "10s"
					timeout = "2s"
				}
			}

			# 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 "http" {
					}
				}
			}

      			# Specify the environment variables
      			# Must have NODE_LOCAL_IP

      			env {
        			NODE_LOCAL_IP = "${attr.unique.network.ip-address}"
        			POSTGRES_DB = "10.60.3.3"
        			POSTGRES_PORT = "5432"
        		}

			# 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"
		}
	}
}