Medium: Migrating off of Pivotal Cloud Foundry? Consider HashiCorp Nomad!

membrane-proxy.nomad

locals {
  membrane_version = "5.0.1"
}

job "membrane-proxy" {
  datacenters = ["gcp-test"]
  priority    = 80

  group "membrane" {
    network {
      port "proxy" { static = 2000 }
    }

    task "proxy" {
      driver = "java"

      env {
        MEMBRANE_HOME = "${NOMAD_TASK_DIR}/membrane-service-proxy-${local.membrane_version}"
      }

      # zip files (zip, tgz, bz2, xz) are automatically unzipped prior to task starting
      artifact {
        source      = "https://github.com/membrane/service-proxy/releases/download/v${local.membrane_version}/membrane-service-proxy-${local.membrane_version}.zip"
        destination = "local"
      }

      template {
        destination = "${NOMAD_TASK_DIR}/proxies.xml"
        change_mode = "restart"
        data        = <<EOF
<spring:beans xmlns="http://membrane-soa.org/proxies/1/"
  xmlns:spring="http://www.springframework.org/schema/beans"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd http://membrane-soa.org/proxies/1/ http://membrane-soa.org/schemas/proxies-1.xsd">

    <serviceProxy port="{{ env "NOMAD_PORT_proxy" }}">
{{- range nomadService "spring-backend" -}}
      <target host="{{ .Address }}" port="{{ .Port}}"/>
{{- end -}}
    </serviceProxy>
  </router>

</spring:beans>
EOF
      }

      config {
        class      = "com.predic8.membrane.core.Starter"
        class_path = "${MEMBRANE_HOME}/conf:${MEMBRANE_HOME}/starter.jar"
        args       = ["-c", "${NOMAD_TASK_DIR}/proxies.xml"]
      }

      service {
        name     = "membrane-proxy"
        provider = "nomad"
        port     = "proxy"
        tags     = ["membrane-service-proxy", "${local.membrane_version}"]
      }
    }
  }
}