Merge pull request #1068 from mumoshu/toggle-metrics-server

Allow toggling Metrics Server installation

Author: mumoshu

core/controlplane/config/templates/cloud-config-controller

@@ -817,12 +817,24 @@ write_files:
       fi
 
       mfdir=/srv/kubernetes/manifests
+      rbac=/srv/kubernetes/rbac
 
       {{ if .UseCalico }}
       /bin/bash /opt/bin/populate-tls-calico-etcd
       applyall "${mfdir}/calico.yaml"
       {{ end }}
 
+      {{ if .Addons.MetricsServer.Enabled -}}
+      applyall \
+        "${mfdir}/metrics-server-sa.yaml" \
+        "${mfdir}/metrics-server-de.yaml" \
+        "${mfdir}/metrics-server-svc.yaml" \
+        "${rbac}/cluster-roles/metrics-server.yaml" \
+        "${rbac}/cluster-role-bindings/metrics-server.yaml" \
+        "${rbac}/role-bindings/metrics-server.yaml" \
+        "${mfdir}/metrics-server-apisvc.yaml"
+      {{- end }}
+
       {{ if .Experimental.NodeDrainer.Enabled }}
       applyall "${mfdir}"/{kube-node-drainer-ds,kube-node-drainer-asg-status-updater-de}".yaml"
       {{ end }}
@@ -834,7 +846,7 @@ write_files:
       applyall "${mfdir}"/{kube-dns,kube-proxy}"-cm.yaml"
 
       # Service Accounts
-      applyall "${mfdir}"/{kube-dns,heapster,kube-proxy,kubernetes-dashboard,metrics-server}"-sa.yaml"
+      applyall "${mfdir}"/{kube-dns,heapster,kube-proxy,kubernetes-dashboard}"-sa.yaml"
 
       # Install tiller by default
       applyall "${mfdir}/tiller.yaml"
@@ -845,27 +857,24 @@ write_files:
 {{ end }}
 
       # Deployments
-      applyall "${mfdir}"/{kube-dns,kube-dns-autoscaler,kubernetes-dashboard,{{ if .Addons.ClusterAutoscaler.Enabled }}cluster-autoscaler,{{ end }}heapster{{ if .KubeResourcesAutosave.Enabled }},kube-resources-autosave{{ end }},metrics-server}"-de.yaml"
+      applyall "${mfdir}"/{kube-dns,kube-dns-autoscaler,kubernetes-dashboard,{{ if .Addons.ClusterAutoscaler.Enabled }}cluster-autoscaler,{{ end }}heapster{{ if .KubeResourcesAutosave.Enabled }},kube-resources-autosave{{ end }}}"-de.yaml"
 
       # Daemonsets
       applyall "${mfdir}"/kube-proxy"-ds.yaml"
 
       # Services
-      applyall "${mfdir}"/{kube-dns,heapster,kubernetes-dashboard,metrics-server}"-svc.yaml"
+      applyall "${mfdir}"/{kube-dns,heapster,kubernetes-dashboard}"-svc.yaml"
 
       {{- if .Addons.Rescheduler.Enabled }}
       applyall "${mfdir}/kube-rescheduler-de.yaml"
       {{- end }}
 
-      # API Services
-      applyall "${mfdir}/metrics-server-apisvc.yaml"
-
       mfdir=/srv/kubernetes/rbac
 
       # Cluster roles and bindings
-      applyall "${mfdir}/cluster-roles"/{node-extensions,metrics-server}".yaml"
+      applyall "${mfdir}/cluster-roles/node-extensions.yaml"
 
-      applyall "${mfdir}/cluster-role-bindings"/{kube-admin,system-worker,node,node-proxier,node-extensions,heapster,metrics-server}".yaml"
+      applyall "${mfdir}/cluster-role-bindings"/{kube-admin,system-worker,node,node-proxier,node-extensions,heapster}".yaml"
 
       {{ if .KubernetesDashboard.AdminPrivileges }}
       applyall "${mfdir}/cluster-role-bindings/kubernetes-dashboard-admin.yaml"
@@ -874,7 +883,7 @@ write_files:
       # Roles and bindings
       applyall "${mfdir}/roles"/{pod-nanny,kubernetes-dashboard}".yaml"
 
-      applyall "${mfdir}/role-bindings"/{heapster-nanny,kubernetes-dashboard,metrics-server}".yaml"
+      applyall "${mfdir}/role-bindings"/{heapster-nanny,kubernetes-dashboard}".yaml"
 
       {{ if .Experimental.TLSBootstrap.Enabled }}
       applyall "${mfdir}/cluster-roles"/{node-bootstrapper,kubelet-certificate-bootstrap}".yaml"

core/controlplane/config/templates/cluster.yaml

@@ -1194,6 +1194,10 @@ addons:
   rescheduler:
     enabled: false
 
+  # Metrics Server (https://github.com/kubernetes-incubator/metrics-server)
+  metricsServer:
+    enabled: false
+
 # Experimental features will change in backward-incompatible ways
 experimental:
   # Enable admission controllers

core/root/config/config.go

@@ -144,6 +144,7 @@ func ConfigFromBytes(data []byte, plugins []*pluginmodel.Plugin) (*Config, error
 		{c.Addons, "addons"},
 		{c.Addons.Rescheduler, "addons.rescheduler"},
 		{c.Addons.ClusterAutoscaler, "addons.clusterAutoscaler"},
+		{c.Addons.MetricsServer, "addons.metricsServer"},
 	}
 
 	for i, np := range c.Worker.NodePools {

model/addons.go

@@ -3,6 +3,7 @@ package model
 type Addons struct {
 	Rescheduler       Rescheduler              `yaml:"rescheduler"`
 	ClusterAutoscaler ClusterAutoscalerSupport `yaml:"clusterAutoscaler,omitempty"`
+	MetricsServer     MetricsServer            `yaml:"metricsServer,omitempty"`
 	UnknownKeys       `yaml:",inline"`
 }
 
@@ -15,3 +16,8 @@ type Rescheduler struct {
 	Enabled     bool `yaml:"enabled"`
 	UnknownKeys `yaml:",inline"`
 }
+
+type MetricsServer struct {
+	Enabled     bool `yaml:"enabled"`
+	UnknownKeys `yaml:",inline"`
+}

test/integration/maincluster_test.go

@@ -405,6 +405,8 @@ addons:
     enabled: true
   clusterAutoscaler:
     enabled: true
+  metricsServer:
+    enabled: true
 worker:
   nodePools:
   - name: pool1
@@ -420,6 +422,9 @@ worker:
 						ClusterAutoscaler: model.ClusterAutoscalerSupport{
 							Enabled: true,
 						},
+						MetricsServer: model.MetricsServer{
+							Enabled: true,
+						},
 					}
 
 					actual := c.Addons