Nomad jobfile for selenium hub nodes using consul

selenium-hub.nomad

job "selenium-hub" {
  region      = "global"
  datacenters = ["dc1"]
  type        = "service"
  priority    = 50

  update {
    stagger      = "10s"
    max_parallel = 1
  }

  group "selenium-hub" {
    count = 1

    restart {
      attempts = 10
      interval = "5m"
      delay    = "25s"
      mode     = "delay"
    }

    network {
      port "selenium_hub" { 
        to = 4444
        static = 4444 
      }
    } 

    task "selenium-hub" {
      driver = "docker"

      config {
        image = "selenium/hub"
        ports = ["selenium_hub"]
      }

      env {
        GRID_TIMEOUT = 300
        GRID_MAX_SESSION = 10
        GRID_BROWSER_TIMEOUT=600
      }

      service {
        name = "selenium-hub"
        tags = ["hub", "selenium"]
        port = "selenium_hub"

        check {
          name     = "alive"
          type     = "tcp"
          interval = "10s"
          timeout  = "2s"
        }
      }

      resources {
        cpu    = 300
        memory = 512
      }

      logs {
        max_files     = 10
        max_file_size = 15
      }

      kill_timeout = "20s"
    }

  }

  group "selenium-chrome-nodes" {

    count = 3

    restart {
      attempts = 10
      interval = "5m"
      delay    = "25s"
      mode     = "delay"
    }

    network {
      port "selenium_node" {}
    }
    
    task "selenium-chrome" {
      driver = "docker"
      
      template {  
        data = <<EOH
REMOTE_HOST="http://{{ env "NOMAD_IP_selenium_node" }}:{{ env "NOMAD_PORT_selenium_node" }}"
HUB_PORT_4444_TCP_ADDR={{ with service "selenium-hub" }}{{ with index . 0 }}{{ .Address }}{{ end }}{{ end }}
HUB_PORT_4444_TCP_PORT={{ with service "selenium-hub" }}{{ with index . 0 }}{{ .Port }}{{ end }}{{ end }}
NODE_PORT="{{ env "NOMAD_PORT_selenium_node" }}"
NODE_MAX_SESSION=10
NODE_MAX_INSTANCES=10
EOH
        destination = "local/file.env"
        env         = true
      }

      config {
        shm_size = 2097152
        ports = ["selenium_node"]
        image = "selenium/node-chrome"
        volumes = ["/dev/shm:/dev/shm"]
      }

      service {
        name = "selenium-node-chrome"
        tags = ["node", "selenium", "selenium-chrome"]
        port = "selenium_node"

        check {
          name     = "alive"
          type     = "tcp"
          interval = "10s"
          timeout  = "2s"
        }
      }

      resources {
        cpu    = 1000
        memory = 2048
      }

      logs {
        max_files     = 10
        max_file_size = 15
      }

      kill_timeout = "20s"
    }
  }
}