Use nomad as sole metrics exporter

Drops cadvisor and node_exporter since Nomad seems to export what I need.

nomad/metrics/exporters.nomad

@@ -2,221 +2,6 @@ job "metrics" {
   datacenters = ["dc1"]
   type = "system"
 
-  group "cadvisor" {
-
-    network {
-      mode = "bridge"
-
-      port "cadvisor" {
-        to = 8080
-      }
-
-      port "expose" {
-      }
-
-      port "cadvisor_envoy_metrics" {
-        to = 9102
-      }
-    }
-
-    service {
-      name = "cadvisor"
-      port = "cadvisor"
-
-      meta {
-        metrics_addr = "${NOMAD_ADDR_expose}"
-        envoy_metrics_addr = "${NOMAD_ADDR_cadvisor_envoy_metrics}"
-        nomad_dc = "${NOMAD_DC}"
-        nomad_node_name = "${node.unique.name}"
-      }
-
-      connect {
-        sidecar_service {
-          proxy {
-            local_service_port = 8080
-
-            expose {
-              path {
-                path = "/metrics"
-                protocol = "http"
-                local_path_port = 8080
-                listener_port = "expose"
-              }
-            }
-
-            config {
-              envoy_prometheus_bind_addr = "0.0.0.0:9102"
-            }
-          }
-        }
-
-        sidecar_task {
-          resources {
-            cpu    = 50
-            memory = 20
-          }
-        }
-      }
-
-      check {
-        type = "http"
-        path = "/metrics"
-        port = "cadvisor"
-        interval = "10s"
-        timeout = "10s"
-      }
-    }
-
-    task "cadvisor" {
-      driver = "docker"
-
-      config {
-        # image = "iamthefij/cadvisor:0.37.5"
-        # image = "iamthefij/cadvisor:0.39.3"
-        # image = "gcr.io/cadvisor/cadvisor:v0.39.3"
-        image = "gcr.io/cadvisor/cadvisor:v0.45.0"
-        args = ["--docker_only=true"]
-
-        ports = ["cadvisor"]
-
-        # volumes = [
-        #   "/:/rootfs:ro",
-        #   "/var/run:/var/run:rw",
-        #   "/sys:/sys:ro",
-        #   "/var/lib/docker/:/var/lib/docker:ro",
-        #   "/cgroup:/cgroup:ro",
-        #   "/etc/machine-id:/etc/machine-id:ro",
-        # ]
-
-        mount {
-          type = "bind"
-          source = "/"
-          target = "/rootfs"
-          readonly = true
-        }
-
-        mount {
-          type = "bind"
-          source = "/var/run"
-          target = "/var/run"
-          readonly = false
-        }
-
-        mount {
-          type = "bind"
-          source = "/sys"
-          target = "/sys"
-          readonly = true
-        }
-
-        mount {
-          type = "bind"
-          source = "/var/lib/docker"
-          target = "/var/lib/docker"
-          readonly = true
-        }
-
-        # mount {
-        #   type = "bind"
-        #   source = "/cgroup"
-        #   target = "/cgroup"
-        #   readonly = true
-        # }
-
-        mount {
-          type = "bind"
-          source = "/etc/machine-id"
-          target = "/etc/machine-id"
-          readonly = true
-        }
-      }
-
-      resources {
-        cpu = 50
-        memory = 100
-      }
-    }
-
-  }
-
-  group "node_exporter" {
-
-    network {
-      mode = "bridge"
-
-      port "node_exporter" {
-        to = 9100
-      }
-    }
-
-    service {
-      name = "nodeexporter"
-      port = "node_exporter"
-
-      meta {
-        metrics_addr = "${NOMAD_ADDR_node_exporter}"
-        nomad_dc = "${NOMAD_DC}"
-        nomad_node_name = "${node.unique.name}"
-      }
-
-      connect {
-        sidecar_service {
-          proxy {
-            local_service_port = 9100
-
-            expose {
-              path {
-                path = "/metrics"
-                protocol = "http"
-                local_path_port = 9100
-                listener_port = "node_exporter"
-              }
-            }
-          }
-        }
-
-        sidecar_task {
-          resources {
-            cpu    = 50
-            memory = 20
-          }
-        }
-      }
-
-      check {
-        type = "http"
-        path = "/metrics"
-        port = "node_exporter"
-        interval = "10s"
-        timeout = "10s"
-      }
-    }
-
-    task "node_exporter" {
-      driver = "docker"
-
-      config {
-        image = "prom/node-exporter:v1.0.1"
-        args = ["--path.rootfs", "/host"]
-
-        ports = ["node_exporter"]
-
-        mount {
-          type = "bind"
-          source = "/"
-          target = "/host"
-          readonly = true
-        }
-      }
-
-      resources {
-        cpu = 50
-        memory = 50
-      }
-    }
-
-  }
-
   group "promtail" {
 
     network {