nomadService discovery cross namespace Service

Nomad
1

I ran a Spring job using Nomad.
I want to load these Spring jobs with Nginx job.
Here is my environment:

  • The namespace of Spring job is dev.
  • The namespace of Nginx job is ops.
  • I want to discover using nomadService in template stanza.
  • However, Spring Service (namespace=dev) is not called from Nginx job (namespace=ops).
  • Here are the methods I tried:
    • spring-boot.dev
    • dev.spring-boot

But neither method worked.

We need your help!

##########################################
My Spring job

job "spring-boot-hello" {
  datacenters = ["dc1"] 
  namespace   = "dev"

  type = "service"

  constraint {
    attribute = "${attr.driver.java.version}"
    operator  = ">"
    value     = "17.0"
  }

  group "run-spring-boot" {

    count = 3

    network {
      port "boot" {
        #static = 8080
      }
    }

    task "java" {

      driver = "java"

      config {
        jar_path    = "local/hashitalks-0.0.1-SNAPSHOT.jar"
        jvm_options = ["-Xmx2048m", "-Xms256m"]
      }

      env {
        PORT  = "${NOMAD_PORT_boot}"
        COLOR = "skyblue"
      }

      artifact {
        source      = "https://github.com/Great-Stone/images/raw/master/build/hashitalks-0.0.1-SNAPSHOT.jar"
        destination = "local/"
      }

      resources {
        cpu        = 500
        memory     = 256
        memory_max = 2048
      }

      service {
        provider = "nomad"

        name = "spring-boot"
        port = "boot"

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

My nginx job

job "nginx" {
  datacenters = ["dc1"]
  namespace = "ops"

 node_pool="default"

group "nginx" {
    count = 1

    network {
      port "http" {
        static = 8080
      }
    }

    service {
      name = "nginx"
      port = "http"
      provider="nomad"
    }

    task "nginx" {
      driver = "docker"

      config {
        image = "nginx"
        ports = ["http"]
        volumes = [
          "local:/etc/nginx/conf.d",
        ]
      }

      template {
        data = <<EOF
upstream backend {
{{ range nomadService "spring-boot" }} # 
  server {{ .Address }}:{{ .Port }}; # Tomcat
{{ else }}server 127.0.0.1:65535; # force a 502
{{ end }}
}

server {
   #listen {{ env "NOMAD_PORT_http" }};
   listen 80;

   location /sample {
      proxy_pass http://backend;
   }

   location /status {
       stub_status on;
   }
}
EOF

        destination   = "local/load-balancer.conf"
        change_mode   = "signal"
        change_signal = "SIGHUP"
      }
    }
  }
}
}
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