hashicorp/faas-nomad

job "faas-nomadd" {
  datacenters = ["dc1"]

  type = "system"

  constraint {
    attribute = "${attr.cpu.arch}"
    operator  = "="
    value     = "amd64"
  }

  group "faas-nomadd" {
    count = 1

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

    task "gateway" {
      driver = "docker"
      template {
        env = true
        destination   = "secrets/gateway.env"
        // point the functions_provider_url to the host running vagrant (assuming a go process listening on 0.0.0.0), always .1 on last octet
        data = <<EOH
functions_provider_url="http://{{ host_address }}:8081/"
{% raw -%}
{{ range service "prometheus" }}
faas_prometheus_host="{{ .Address }}"
faas_prometheus_port="{{ .Port }}"{{ end }}
{{ range service "nats" }}
faas_nats_address="{{ .Address }}"
faas_nats_port={{ .Port }}{{ end }}
{%- endraw %}
EOH
      }

      config {
        image = "openfaas/gateway:0.9.14"

        port_map {
          http = 8080
        }
      }

      resources {
        cpu    = 500 # 500 MHz
        memory = 128 # 128MB

        network {
          mbits = 10

          port "http" {
            static = 8080
          }
        }
      }

      service {
        port = "http"
        name = "gateway"
        tags = ["faas"]
      }
    }

    task "statsd" {
      driver = "docker"

      config {
        image = "prom/statsd-exporter:v0.4.0"

        args = [
          "-log.level=debug",
        ]
      }

      resources {
        cpu    = 100 # 100 MHz
        memory = 36 # 36MB

        network {
          mbits = 1

          port "http" {
            static = 9102
          }

          port "statsd" {
            static = 9125
          }
        }
      }

      service {
        port = "http"
        name = "statsd"
        tags = ["faas"]

        check {
          type     = "http"
          port     = "http"
          interval = "10s"
          timeout  = "2s"
          path     = "/"
        }
      }
    }
  }

  group "faas-nats" {
    count = 1

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

    task "nats" {
      driver = "docker"
      
      config {
        image = "nats-streaming:0.11.2-linux"

        args = [
          "-store", "file", "-dir", "/tmp/nats",
          "-m", "8222",
          "-cid","faas-cluster",
        ]

        port_map {
          client = 4222,
          monitoring = 8222
          routing = 6222
        }
      }

      resources {
        cpu    = 400 # 100 MHz
        memory = 128 # 128MB

        network {
          mbits = 1

          port "client" {
            static = 4222
          }

          port "monitoring" {
            static = 8222
          }

          port "routing" {
            static = 6222
          }
        }
      }

      service {
        port = "client"
        name = "nats"
        tags = ["faas"]

        check {
           type     = "http"
           port     = "monitoring"
           path     = "/connz"
           interval = "5s"
           timeout  = "2s"
        }
      }
    }
  }
}