Zookeeper

zookeeper.hcl

# Zookeeper

job "zookeeper" {
    # Specify Region
    region = "uswest-fremont"

    # Specify Datacenter
    datacenters = [ "fremont-dc1"]

    # Specify job type
    type = "service"

    # Run tasks in serial or parallel (1 for serial)
    update {
        max_parallel = 1
    }

    # define group
    group "zk-docker" {

        # define the number of times the tasks need to be executed
        count = 3

        # define job constraints
        constraint {
            attribute = "${attr.kernel.name}"
            value = "linux"
        }
        constraint {
            attribute = "${meta.zk_host_key}"
            value = "zookeeper"
        }

        # specify the number of attemtps to run the job within the specified interval
        restart {
            attempts = 10
            interval = "5m"
            delay = "25s"
            mode = "delay"
        }

        task "zookeeper" {
            driver = "docker"
            artifact {
                source = "https://gist.githubusercontent.com/smuthali/d267efdc67f269efefeebf7668618a69/raw/1b7c066deb1a9da44a455f9c72cf79455c7f256e/zoo.tpl"
                destination = "local"
            }

            artifact {
                source = "https://gist.githubusercontent.com/smuthali/82b5e39650f9a29032391c7e49b96ed2/raw/f8e90f17848d3538b0cb1d8ab527c37a128f2e8c/myid.tpl"
                destination = "local"
            }

            template {
                source = "local/zoo.tpl"
                destination = "/opt/zookeeper/config/zoo.cfg"
                change_mode = "noop"
            }

            template {
                source = "local/myid.tpl"
                destination = "/opt/zookeeper/datadir/myid"
                change_mode = "noop"
            }

            config {
                image = <REDACTED>
                labels {
                    group = "zk-docker"
                }
                auth {
                    username = <REDACTED>
                    password = <REDACTED>
                }
                port_map {
                    zoo_port = 2181/tcp
                    zoo_peer1 = 2888/tcp
                    zoo_peer2 = 3888/tcp
                }
                volumes = [
                    "/opt/zookeeper/config:/opt/zookeeper/conf",
                    "/opt/zookeeper/datadir:/tmp/zookeeper"
                    ]
                }
            resources {
                cpu = 100
                memory = 128
                network {
                    mbits = 10
                    port "zoo_port" { static = 2181 }
                    port "zoo_peer1" { static = 2888 }
                    port "zoo_peer2" { static = 3888 }
                    }
                }
            service {
                tags = ["zookeeper"]
                check {
                    type = "script"
                    name = "zookeeper_docker_check"
                    command = "/etc/consul.d/config/zk_check.sh"
                    interval = "60s"
                    timeout = "5s"
                }
            }
            }
        }
    }