nomad.job

job "scalad" {
  region = "global"
  datacenters = ["dc1"]
  type        = "service"

  group "job-autoscaler" {
    count = 1

    task "scaler" {
      driver = "docker"

      config {
        image = "trivago/scalad:0.1"
        force_pull = true
        network_mode = "host"
      }

      service {
        name = "${NOMAD_JOB_NAME}"
        tags = ["nomad-autoscaler", "scalad"]
        port = "http"

        check {
          type     = "http"
          path     = "/"
          interval = "30s"
          timeout  = "2s"
        }
      }

      template {
        data = <<EOH
         PORT = {{ env "NOMAD_ADDR_http" }}
         NOMAD_HOST = "http://nomad.service.consul:4646"
         ##Slack Parameters for sending scaling events
         USE_SLACK = "false"
         SLACK_CHANNEL = "#scalad"
         SLACK_USERNAME = "scalad"
         SLACK_WEBHOOK = ""
         ##enable scaling of jobs with secrets from vault (this token needs access to the all policies of jobs that scalad will scale
         VAULT_TOKEN =  ""
         ##authentication for the manual scaling endpoints
         HTTP_USER = "user"
         HTTP_PASS = "pass"
         ##prometheus endpoint to run queries against for scaling
         METRICS_ENDPOINT = "http://prometheus.service.consul:9090/api/v1/query?query="

         EOH

        destination = "secrets/file.env"
        env         = true
      }

      resources {
        cpu    = 300
        memory = 128

        network {
          port  "http"{}
        }
      }
    }
  }
}