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Kubernetes Submit Queue 39581ac9bf Merge pull request #51122 from luxas/kubeadm_impl_dryrun

Automatic merge from submit-queue (batch tested with PRs 51134, 51122, 50562, 50971, 51327)

kubeadm: Fully implement --dry-run

**What this PR does / why we need it**:

Finishes the work begun in #50631 
 - Implements dry-run functionality for phases certs/kubeconfig/controlplane/etcd as well by making the outDir configurable
 - Prints the controlplane manifests to stdout, but not the certs/kubeconfig files due to the sensitive nature. However, kubeadm outputs the directory to go and look in for those.
 - Fixes a small yaml marshal error where `apiVersion` and `kind` wasn't printed earlier.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #

fixes: https://github.com/kubernetes/kubeadm/issues/389

**Special notes for your reviewer**:

Full `kubeadm init --dry-run` output:

```
[kubeadm] WARNING: kubeadm is in beta, please do not use it for production clusters.
[init] Using Kubernetes version: v1.7.4
[init] Using Authorization mode: [Node RBAC]
[preflight] Running pre-flight checks
[preflight] WARNING: docker service is not enabled, please run 'systemctl enable docker.service'
[preflight] Starting the kubelet service
[kubeadm] WARNING: starting in 1.8, tokens expire after 24 hours by default (if you require a non-expiring token use --token-ttl 0)
[certificates] Generated ca certificate and key.
[certificates] Generated apiserver certificate and key.
[certificates] apiserver serving cert is signed for DNS names [thegopher kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local] and IPs [10.96.0.1 192.168.200.101]
[certificates] Generated apiserver-kubelet-client certificate and key.
[certificates] Generated sa key and public key.
[certificates] Generated front-proxy-ca certificate and key.
[certificates] Generated front-proxy-client certificate and key.
[certificates] Valid certificates and keys now exist in "/tmp/kubeadm-init-dryrun477531930"
[kubeconfig] Wrote KubeConfig file to disk: "admin.conf"
[kubeconfig] Wrote KubeConfig file to disk: "kubelet.conf"
[kubeconfig] Wrote KubeConfig file to disk: "controller-manager.conf"
[kubeconfig] Wrote KubeConfig file to disk: "scheduler.conf"
[dryrun] Wrote certificates, kubeconfig files and control plane manifests to "/tmp/kubeadm-init-dryrun477531930"
[dryrun] Won't print certificates or kubeconfig files due to the sensitive nature of them
[dryrun] Please go and examine the "/tmp/kubeadm-init-dryrun477531930" directory for details about what would be written
[dryrun] Would write file "/etc/kubernetes/manifests/kube-apiserver.yaml" with content:
	apiVersion: v1
	kind: Pod
	metadata:
	  annotations:
	    scheduler.alpha.kubernetes.io/critical-pod: ""
	  creationTimestamp: null
	  labels:
	    component: kube-apiserver
	    tier: control-plane
	  name: kube-apiserver
	  namespace: kube-system
	spec:
	  containers:
	  - command:
	    - kube-apiserver
	    - --allow-privileged=true
	    - --kubelet-preferred-address-types=InternalIP,ExternalIP,Hostname
	    - --requestheader-extra-headers-prefix=X-Remote-Extra-
	    - --service-cluster-ip-range=10.96.0.0/12
	    - --tls-cert-file=/etc/kubernetes/pki/apiserver.crt
	    - --tls-private-key-file=/etc/kubernetes/pki/apiserver.key
	    - --proxy-client-cert-file=/etc/kubernetes/pki/front-proxy-client.crt
	    - --admission-control=Initializers,NamespaceLifecycle,LimitRanger,ServiceAccount,PersistentVolumeLabel,DefaultStorageClass,DefaultTolerationSeconds,NodeRestriction,ResourceQuota
	    - --experimental-bootstrap-token-auth=true
	    - --client-ca-file=/etc/kubernetes/pki/ca.crt
	    - --kubelet-client-key=/etc/kubernetes/pki/apiserver-kubelet-client.key
	    - --secure-port=6443
	    - --proxy-client-key-file=/etc/kubernetes/pki/front-proxy-client.key
	    - --insecure-port=0
	    - --requestheader-username-headers=X-Remote-User
	    - --requestheader-group-headers=X-Remote-Group
	    - --requestheader-allowed-names=front-proxy-client
	    - --advertise-address=192.168.200.101
	    - --service-account-key-file=/etc/kubernetes/pki/sa.pub
	    - --kubelet-client-certificate=/etc/kubernetes/pki/apiserver-kubelet-client.crt
	    - --requestheader-client-ca-file=/etc/kubernetes/pki/front-proxy-ca.crt
	    - --authorization-mode=Node,RBAC
	    - --etcd-servers=http://127.0.0.1:2379
	    image: gcr.io/google_containers/kube-apiserver-amd64:v1.7.4
	    livenessProbe:
	      failureThreshold: 8
	      httpGet:
	        host: 127.0.0.1
	        path: /healthz
	        port: 6443
	        scheme: HTTPS
	      initialDelaySeconds: 15
	      timeoutSeconds: 15
	    name: kube-apiserver
	    resources:
	      requests:
	        cpu: 250m
	    volumeMounts:
	    - mountPath: /etc/kubernetes/pki
	      name: k8s-certs
	      readOnly: true
	    - mountPath: /etc/ssl/certs
	      name: ca-certs
	      readOnly: true
	    - mountPath: /etc/pki
	      name: ca-certs-etc-pki
	      readOnly: true
	  hostNetwork: true
	  volumes:
	  - hostPath:
	      path: /etc/kubernetes/pki
	    name: k8s-certs
	  - hostPath:
	      path: /etc/ssl/certs
	    name: ca-certs
	  - hostPath:
	      path: /etc/pki
	    name: ca-certs-etc-pki
	status: {}
[dryrun] Would write file "/etc/kubernetes/manifests/kube-controller-manager.yaml" with content:
	apiVersion: v1
	kind: Pod
	metadata:
	  annotations:
	    scheduler.alpha.kubernetes.io/critical-pod: ""
	  creationTimestamp: null
	  labels:
	    component: kube-controller-manager
	    tier: control-plane
	  name: kube-controller-manager
	  namespace: kube-system
	spec:
	  containers:
	  - command:
	    - kube-controller-manager
	    - --address=127.0.0.1
	    - --kubeconfig=/etc/kubernetes/controller-manager.conf
	    - --cluster-signing-cert-file=/etc/kubernetes/pki/ca.crt
	    - --cluster-signing-key-file=/etc/kubernetes/pki/ca.key
	    - --leader-elect=true
	    - --use-service-account-credentials=true
	    - --controllers=*,bootstrapsigner,tokencleaner
	    - --root-ca-file=/etc/kubernetes/pki/ca.crt
	    - --service-account-private-key-file=/etc/kubernetes/pki/sa.key
	    image: gcr.io/google_containers/kube-controller-manager-amd64:v1.7.4
	    livenessProbe:
	      failureThreshold: 8
	      httpGet:
	        host: 127.0.0.1
	        path: /healthz
	        port: 10252
	        scheme: HTTP
	      initialDelaySeconds: 15
	      timeoutSeconds: 15
	    name: kube-controller-manager
	    resources:
	      requests:
	        cpu: 200m
	    volumeMounts:
	    - mountPath: /etc/kubernetes/pki
	      name: k8s-certs
	      readOnly: true
	    - mountPath: /etc/ssl/certs
	      name: ca-certs
	      readOnly: true
	    - mountPath: /etc/kubernetes/controller-manager.conf
	      name: kubeconfig
	      readOnly: true
	    - mountPath: /etc/pki
	      name: ca-certs-etc-pki
	      readOnly: true
	  hostNetwork: true
	  volumes:
	  - hostPath:
	      path: /etc/kubernetes/pki
	    name: k8s-certs
	  - hostPath:
	      path: /etc/ssl/certs
	    name: ca-certs
	  - hostPath:
	      path: /etc/kubernetes/controller-manager.conf
	    name: kubeconfig
	  - hostPath:
	      path: /etc/pki
	    name: ca-certs-etc-pki
	status: {}
[dryrun] Would write file "/etc/kubernetes/manifests/kube-scheduler.yaml" with content:
	apiVersion: v1
	kind: Pod
	metadata:
	  annotations:
	    scheduler.alpha.kubernetes.io/critical-pod: ""
	  creationTimestamp: null
	  labels:
	    component: kube-scheduler
	    tier: control-plane
	  name: kube-scheduler
	  namespace: kube-system
	spec:
	  containers:
	  - command:
	    - kube-scheduler
	    - --leader-elect=true
	    - --kubeconfig=/etc/kubernetes/scheduler.conf
	    - --address=127.0.0.1
	    image: gcr.io/google_containers/kube-scheduler-amd64:v1.7.4
	    livenessProbe:
	      failureThreshold: 8
	      httpGet:
	        host: 127.0.0.1
	        path: /healthz
	        port: 10251
	        scheme: HTTP
	      initialDelaySeconds: 15
	      timeoutSeconds: 15
	    name: kube-scheduler
	    resources:
	      requests:
	        cpu: 100m
	    volumeMounts:
	    - mountPath: /etc/kubernetes/scheduler.conf
	      name: kubeconfig
	      readOnly: true
	  hostNetwork: true
	  volumes:
	  - hostPath:
	      path: /etc/kubernetes/scheduler.conf
	    name: kubeconfig
	status: {}
[markmaster] Will mark node thegopher as master by adding a label and a taint
[dryrun] Would perform action GET on resource "nodes" in API group "core/v1"
[dryrun] Resource name: "thegopher"
[dryrun] Would perform action PATCH on resource "nodes" in API group "core/v1"
[dryrun] Resource name: "thegopher"
[dryrun] Attached patch:
	{"metadata":{"labels":{"node-role.kubernetes.io/master":""}},"spec":{"taints":[{"effect":"NoSchedule","key":"node-role.kubernetes.io/master","timeAdded":null}]}}
[markmaster] Master thegopher tainted and labelled with key/value: node-role.kubernetes.io/master=""
[token] Using token: 96efd6.98bbb2f4603c026b
[dryrun] Would perform action GET on resource "secrets" in API group "core/v1"
[dryrun] Resource name: "bootstrap-token-96efd6"
[dryrun] Would perform action CREATE on resource "secrets" in API group "core/v1"
[dryrun] Attached object:
	apiVersion: v1
	data:
	  description: VGhlIGRlZmF1bHQgYm9vdHN0cmFwIHRva2VuIGdlbmVyYXRlZCBieSAna3ViZWFkbSBpbml0Jy4=
	  expiration: MjAxNy0wOC0yM1QyMzoxOTozNCswMzowMA==
	  token-id: OTZlZmQ2
	  token-secret: OThiYmIyZjQ2MDNjMDI2Yg==
	  usage-bootstrap-authentication: dHJ1ZQ==
	  usage-bootstrap-signing: dHJ1ZQ==
	kind: Secret
	metadata:
	  creationTimestamp: null
	  name: bootstrap-token-96efd6
	type: bootstrap.kubernetes.io/token
[bootstraptoken] Configured RBAC rules to allow Node Bootstrap tokens to post CSRs in order for nodes to get long term certificate credentials
[dryrun] Would perform action CREATE on resource "clusterrolebindings" in API group "rbac.authorization.k8s.io/v1beta1"
[dryrun] Attached object:
	apiVersion: rbac.authorization.k8s.io/v1beta1
	kind: ClusterRoleBinding
	metadata:
	  creationTimestamp: null
	  name: kubeadm:kubelet-bootstrap
	roleRef:
	  apiGroup: rbac.authorization.k8s.io
	  kind: ClusterRole
	  name: system:node-bootstrapper
	subjects:
	- kind: Group
	  name: system:bootstrappers
[bootstraptoken] Configured RBAC rules to allow the csrapprover controller automatically approve CSRs from a Node Bootstrap Token
[dryrun] Would perform action CREATE on resource "clusterroles" in API group "rbac.authorization.k8s.io/v1beta1"
[dryrun] Attached object:
	apiVersion: rbac.authorization.k8s.io/v1beta1
	kind: ClusterRole
	metadata:
	  creationTimestamp: null
	  name: system:certificates.k8s.io:certificatesigningrequests:nodeclient
	rules:
	- apiGroups:
	  - certificates.k8s.io
	  resources:
	  - certificatesigningrequests/nodeclient
	  verbs:
	  - create
[dryrun] Would perform action CREATE on resource "clusterrolebindings" in API group "rbac.authorization.k8s.io/v1beta1"
[dryrun] Attached object:
	apiVersion: rbac.authorization.k8s.io/v1beta1
	kind: ClusterRoleBinding
	metadata:
	  creationTimestamp: null
	  name: kubeadm:node-autoapprove-bootstrap
	roleRef:
	  apiGroup: rbac.authorization.k8s.io
	  kind: ClusterRole
	  name: system:certificates.k8s.io:certificatesigningrequests:nodeclient
	subjects:
	- kind: Group
	  name: system:bootstrappers
[bootstraptoken] Creating the "cluster-info" ConfigMap in the "kube-public" namespace
[dryrun] Would perform action CREATE on resource "configmaps" in API group "core/v1"
[dryrun] Attached object:
	apiVersion: v1
	data:
	  kubeconfig: |
	    apiVersion: v1
	    clusters:
	    - cluster:
	        certificate-authority-data: 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
	        server: https://192.168.200.101:6443
	      name: ""
	    contexts: []
	    current-context: ""
	    kind: Config
	    preferences: {}
	    users: []
	kind: ConfigMap
	metadata:
	  creationTimestamp: null
	  name: cluster-info
	  namespace: kube-public
[dryrun] Would perform action CREATE on resource "roles" in API group "rbac.authorization.k8s.io/v1beta1"
[dryrun] Attached object:
	apiVersion: rbac.authorization.k8s.io/v1beta1
	kind: Role
	metadata:
	  creationTimestamp: null
	  name: kubeadm:bootstrap-signer-clusterinfo
	  namespace: kube-public
	rules:
	- apiGroups:
	  - ""
	  resourceNames:
	  - cluster-info
	  resources:
	  - configmaps
	  verbs:
	  - get
[dryrun] Would perform action CREATE on resource "rolebindings" in API group "rbac.authorization.k8s.io/v1beta1"
[dryrun] Attached object:
	apiVersion: rbac.authorization.k8s.io/v1beta1
	kind: RoleBinding
	metadata:
	  creationTimestamp: null
	  name: kubeadm:bootstrap-signer-clusterinfo
	  namespace: kube-public
	roleRef:
	  apiGroup: rbac.authorization.k8s.io
	  kind: Role
	  name: kubeadm:bootstrap-signer-clusterinfo
	subjects:
	- kind: User
	  name: system:anonymous
[uploadconfig] Storing the configuration used in ConfigMap "kubeadm-config" in the "kube-system" Namespace
[dryrun] Would perform action CREATE on resource "configmaps" in API group "core/v1"
[dryrun] Attached object:
	apiVersion: v1
	data:
	  MasterConfiguration: |
	    api:
	      advertiseAddress: 192.168.200.101
	      bindPort: 6443
	    apiServerCertSANs: []
	    apiServerExtraArgs: null
	    authorizationModes:
	    - Node
	    - RBAC
	    certificatesDir: /etc/kubernetes/pki
	    cloudProvider: ""
	    controllerManagerExtraArgs: null
	    etcd:
	      caFile: ""
	      certFile: ""
	      dataDir: /var/lib/etcd
	      endpoints: []
	      extraArgs: null
	      image: ""
	      keyFile: ""
	    featureFlags: null
	    imageRepository: gcr.io/google_containers
	    kubernetesVersion: v1.7.4
	    networking:
	      dnsDomain: cluster.local
	      podSubnet: ""
	      serviceSubnet: 10.96.0.0/12
	    nodeName: thegopher
	    schedulerExtraArgs: null
	    token: 96efd6.98bbb2f4603c026b
	    tokenTTL: 86400000000000
	    unifiedControlPlaneImage: ""
	kind: ConfigMap
	metadata:
	  creationTimestamp: null
	  name: kubeadm-config
	  namespace: kube-system
[dryrun] Would perform action GET on resource "clusterrolebindings" in API group "rbac.authorization.k8s.io/v1beta1"
[dryrun] Resource name: "system:node"
[dryrun] Would perform action CREATE on resource "serviceaccounts" in API group "core/v1"
[dryrun] Attached object:
	apiVersion: v1
	kind: ServiceAccount
	metadata:
	  creationTimestamp: null
	  name: kube-dns
	  namespace: kube-system
[dryrun] Would perform action GET on resource "services" in API group "core/v1"
[dryrun] Resource name: "kubernetes"
[dryrun] Would perform action CREATE on resource "deployments" in API group "extensions/v1beta1"
[dryrun] Attached object:
	apiVersion: extensions/v1beta1
	kind: Deployment
	metadata:
	  creationTimestamp: null
	  labels:
	    k8s-app: kube-dns
	  name: kube-dns
	  namespace: kube-system
	spec:
	  selector:
	    matchLabels:
	      k8s-app: kube-dns
	  strategy:
	    rollingUpdate:
	      maxSurge: 10%
	      maxUnavailable: 0
	  template:
	    metadata:
	      creationTimestamp: null
	      labels:
	        k8s-app: kube-dns
	    spec:
	      affinity:
	        nodeAffinity:
	          requiredDuringSchedulingIgnoredDuringExecution:
	            nodeSelectorTerms:
	            - matchExpressions:
	              - key: beta.kubernetes.io/arch
	                operator: In
	                values:
	                - amd64
	      containers:
	      - args:
	        - --domain=cluster.local.
	        - --dns-port=10053
	        - --config-dir=/kube-dns-config
	        - --v=2
	        env:
	        - name: PROMETHEUS_PORT
	          value: "10055"
	        image: gcr.io/google_containers/k8s-dns-kube-dns-amd64:1.14.4
	        imagePullPolicy: IfNotPresent
	        livenessProbe:
	          failureThreshold: 5
	          httpGet:
	            path: /healthcheck/kubedns
	            port: 10054
	            scheme: HTTP
	          initialDelaySeconds: 60
	          successThreshold: 1
	          timeoutSeconds: 5
	        name: kubedns
	        ports:
	        - containerPort: 10053
	          name: dns-local
	          protocol: UDP
	        - containerPort: 10053
	          name: dns-tcp-local
	          protocol: TCP
	        - containerPort: 10055
	          name: metrics
	          protocol: TCP
	        readinessProbe:
	          httpGet:
	            path: /readiness
	            port: 8081
	            scheme: HTTP
	          initialDelaySeconds: 3
	          timeoutSeconds: 5
	        resources:
	          limits:
	            memory: 170Mi
	          requests:
	            cpu: 100m
	            memory: 70Mi
	        volumeMounts:
	        - mountPath: /kube-dns-config
	          name: kube-dns-config
	      - args:
	        - -v=2
	        - -logtostderr
	        - -configDir=/etc/k8s/dns/dnsmasq-nanny
	        - -restartDnsmasq=true
	        - --
	        - -k
	        - --cache-size=1000
	        - --log-facility=-
	        - --server=/cluster.local/127.0.0.1#10053
	        - --server=/in-addr.arpa/127.0.0.1#10053
	        - --server=/ip6.arpa/127.0.0.1#10053
	        image: gcr.io/google_containers/k8s-dns-dnsmasq-nanny-amd64:1.14.4
	        imagePullPolicy: IfNotPresent
	        livenessProbe:
	          failureThreshold: 5
	          httpGet:
	            path: /healthcheck/dnsmasq
	            port: 10054
	            scheme: HTTP
	          initialDelaySeconds: 60
	          successThreshold: 1
	          timeoutSeconds: 5
	        name: dnsmasq
	        ports:
	        - containerPort: 53
	          name: dns
	          protocol: UDP
	        - containerPort: 53
	          name: dns-tcp
	          protocol: TCP
	        resources:
	          requests:
	            cpu: 150m
	            memory: 20Mi
	        volumeMounts:
	        - mountPath: /etc/k8s/dns/dnsmasq-nanny
	          name: kube-dns-config
	      - args:
	        - --v=2
	        - --logtostderr
	        - --probe=kubedns,127.0.0.1:10053,kubernetes.default.svc.cluster.local,5,A
	        - --probe=dnsmasq,127.0.0.1:53,kubernetes.default.svc.cluster.local,5,A
	        image: gcr.io/google_containers/k8s-dns-sidecar-amd64:1.14.4
	        imagePullPolicy: IfNotPresent
	        livenessProbe:
	          failureThreshold: 5
	          httpGet:
	            path: /metrics
	            port: 10054
	            scheme: HTTP
	          initialDelaySeconds: 60
	          successThreshold: 1
	          timeoutSeconds: 5
	        name: sidecar
	        ports:
	        - containerPort: 10054
	          name: metrics
	          protocol: TCP
	        resources:
	          requests:
	            cpu: 10m
	            memory: 20Mi
	      dnsPolicy: Default
	      serviceAccountName: kube-dns
	      tolerations:
	      - key: CriticalAddonsOnly
	        operator: Exists
	      - effect: NoSchedule
	        key: node-role.kubernetes.io/master
	      volumes:
	      - configMap:
	          name: kube-dns
	          optional: true
	        name: kube-dns-config
	status: {}
[dryrun] Would perform action CREATE on resource "services" in API group "core/v1"
[dryrun] Attached object:
	apiVersion: v1
	kind: Service
	metadata:
	  creationTimestamp: null
	  labels:
	    k8s-app: kube-dns
	    kubernetes.io/cluster-service: "true"
	    kubernetes.io/name: KubeDNS
	  name: kube-dns
	  namespace: kube-system
	  resourceVersion: "0"
	spec:
	  clusterIP: 10.96.0.10
	  ports:
	  - name: dns
	    port: 53
	    protocol: UDP
	    targetPort: 53
	  - name: dns-tcp
	    port: 53
	    protocol: TCP
	    targetPort: 53
	  selector:
	    k8s-app: kube-dns
	status:
	  loadBalancer: {}
[addons] Applied essential addon: kube-dns
[dryrun] Would perform action CREATE on resource "serviceaccounts" in API group "core/v1"
[dryrun] Attached object:
	apiVersion: v1
	kind: ServiceAccount
	metadata:
	  creationTimestamp: null
	  name: kube-proxy
	  namespace: kube-system
[dryrun] Would perform action CREATE on resource "configmaps" in API group "core/v1"
[dryrun] Attached object:
	apiVersion: v1
	data:
	  kubeconfig.conf: |
	    apiVersion: v1
	    kind: Config
	    clusters:
	    - cluster:
	        certificate-authority: /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
	        server: https://192.168.200.101:6443
	      name: default
	    contexts:
	    - context:
	        cluster: default
	        namespace: default
	        user: default
	      name: default
	    current-context: default
	    users:
	    - name: default
	      user:
	        tokenFile: /var/run/secrets/kubernetes.io/serviceaccount/token
	kind: ConfigMap
	metadata:
	  creationTimestamp: null
	  labels:
	    app: kube-proxy
	  name: kube-proxy
	  namespace: kube-system
[dryrun] Would perform action CREATE on resource "daemonsets" in API group "extensions/v1beta1"
[dryrun] Attached object:
	apiVersion: extensions/v1beta1
	kind: DaemonSet
	metadata:
	  creationTimestamp: null
	  labels:
	    k8s-app: kube-proxy
	  name: kube-proxy
	  namespace: kube-system
	spec:
	  selector:
	    matchLabels:
	      k8s-app: kube-proxy
	  template:
	    metadata:
	      creationTimestamp: null
	      labels:
	        k8s-app: kube-proxy
	    spec:
	      containers:
	      - command:
	        - /usr/local/bin/kube-proxy
	        - --kubeconfig=/var/lib/kube-proxy/kubeconfig.conf
	        image: gcr.io/google_containers/kube-proxy-amd64:v1.7.4
	        imagePullPolicy: IfNotPresent
	        name: kube-proxy
	        resources: {}
	        securityContext:
	          privileged: true
	        volumeMounts:
	        - mountPath: /var/lib/kube-proxy
	          name: kube-proxy
	        - mountPath: /run/xtables.lock
	          name: xtables-lock
	      hostNetwork: true
	      serviceAccountName: kube-proxy
	      tolerations:
	      - effect: NoSchedule
	        key: node-role.kubernetes.io/master
	      - effect: NoSchedule
	        key: node.cloudprovider.kubernetes.io/uninitialized
	        value: "true"
	      volumes:
	      - configMap:
	          name: kube-proxy
	        name: kube-proxy
	      - hostPath:
	          path: /run/xtables.lock
	        name: xtables-lock
	  updateStrategy:
	    type: RollingUpdate
	status:
	  currentNumberScheduled: 0
	  desiredNumberScheduled: 0
	  numberMisscheduled: 0
	  numberReady: 0
[dryrun] Would perform action CREATE on resource "clusterrolebindings" in API group "rbac.authorization.k8s.io/v1beta1"
[dryrun] Attached object:
	apiVersion: rbac.authorization.k8s.io/v1beta1
	kind: ClusterRoleBinding
	metadata:
	  creationTimestamp: null
	  name: kubeadm:node-proxier
	roleRef:
	  apiGroup: rbac.authorization.k8s.io
	  kind: ClusterRole
	  name: system:node-proxier
	subjects:
	- kind: ServiceAccount
	  name: kube-proxy
	  namespace: kube-system
[addons] Applied essential addon: kube-proxy

Your Kubernetes master has initialized successfully!

To start using your cluster, you need to run (as a regular user):

  mkdir -p $HOME/.kube
  sudo cp -i /tmp/kubeadm-init-dryrun477531930/admin.conf $HOME/.kube/config
  sudo chown $(id -u):$(id -g) $HOME/.kube/config

You should now deploy a pod network to the cluster.
Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at:
  http://kubernetes.io/docs/admin/addons/

You can now join any number of machines by running the following on each node
as root:

  kubeadm join --token 96efd6.98bbb2f4603c026b 192.168.200.101:6443 --discovery-token-ca-cert-hash sha256:ccb794198ae65cb3c9e997be510c18023e0e9e064225a588997b9e6c64ebf9f1

```

**Release note**:

```release-note
kubeadm: Implement a `--dry-run` mode and flag for `kubeadm`
```
@kubernetes/sig-cluster-lifecycle-pr-reviews @ncdc @sttts

2017-08-25 14:01:27 -07:00

.github

…

api

Merge pull request #50033 from cmluciano/cml/addnpcidrselector

2017-08-25 11:07:07 -07:00

build

Merge pull request #51229 from ixdy/always-create-vendor-BUILD

2017-08-25 03:15:36 -07:00

cluster

Merge pull request #50063 from dixudx/manifests_use_hostpath_type

2017-08-25 12:31:02 -07:00

cmd

Merge pull request #51122 from luxas/kubeadm_impl_dryrun

2017-08-25 14:01:27 -07:00

docs

Merge pull request #50033 from cmluciano/cml/addnpcidrselector

2017-08-25 11:07:07 -07:00

examples

Merge pull request #50063 from dixudx/manifests_use_hostpath_type

2017-08-25 12:31:02 -07:00

federation

Merge pull request #51197 from deads2k/api-02-field-default

2017-08-25 06:22:20 -07:00

Godeps

Bumped gRPC version to 1.3.0

2017-08-23 09:55:55 -07:00

hack

Merge pull request #51134 from stevekuznetsov/skuznets/verbose-bazel-error

2017-08-25 13:59:51 -07:00

logo

…

pkg

Merge pull request #47171 from xilabao/validate-nonResourceURL-in-create-clusterrole

2017-08-25 12:31:07 -07:00

plugin

Merge pull request #51261 from xilabao/remove-deprecated-rule

2017-08-25 07:58:14 -07:00

staging

Merge pull request #50033 from cmluciano/cml/addnpcidrselector

2017-08-25 11:07:07 -07:00

test

Consume new config value for network project id

2017-08-25 08:42:28 -07:00

third_party

Use buildozer to remove deprecated automanaged tags

2017-08-11 09:31:50 -07:00

translations

Italian translation

2017-08-23 08:45:26 +02:00

vendor

Regenerate the vendor/BUILD file

2017-08-24 14:07:21 -07:00

.bazelrc

…

.generated_files

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.gitattributes

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.gitignore

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.kazelcfg.json

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BUILD.bazel

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CHANGELOG.md

Update CHANGELOG.md for v1.8.0-alpha.3.

2017-08-23 16:18:55 -07:00

code-of-conduct.md

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CONTRIBUTING.md

…

labels.yaml

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LICENSE

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Makefile

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Makefile.generated_files

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OWNERS

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OWNERS_ALIASES

add sig leads to owners-aliases

2017-08-23 14:35:20 -07:00

README.md

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SUPPORT.md

Add a SUPPORT.md file for github

2017-08-11 14:42:36 -04:00

Vagrantfile

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WORKSPACE

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README.md

Kubernetes

Kubernetes is an open source system for managing containerized applications across multiple hosts, providing basic mechanisms for deployment, maintenance, and scaling of applications.

Kubernetes builds upon a decade and a half of experience at Google running production workloads at scale using a system called Borg, combined with best-of-breed ideas and practices from the community.

Kubernetes is hosted by the Cloud Native Computing Foundation (CNCF). If you are a company that wants to help shape the evolution of technologies that are container-packaged, dynamically-scheduled and microservices-oriented, consider joining the CNCF. For details about who's involved and how Kubernetes plays a role, read the CNCF announcement.

To start using Kubernetes

See our documentation on kubernetes.io.

Try our interactive tutorial.

Take a free course on Scalable Microservices with Kubernetes.

To start developing Kubernetes

The community repository hosts all information about building Kubernetes from source, how to contribute code and documentation, who to contact about what, etc.

If you want to build Kubernetes right away there are two options:

You have a working Go environment.

$ go get -d k8s.io/kubernetes
$ cd $GOPATH/src/k8s.io/kubernetes
$ make

You have a working Docker environment.

$ git clone https://github.com/kubernetes/kubernetes
$ cd kubernetes
$ make quick-release

If you are less impatient, head over to the developer's documentation.

Support

If you need support, start with the troubleshooting guide and work your way through the process that we've outlined.

That said, if you have questions, reach out to us one way or another.