使用kubeadm离线部署kubernetes v1.9.0
环境说明（centos7.2）：
192.168.111.117 master
192.168.111.123 slave1
192.168.111.184 slave2配置互信
生成ssh 密钥对
[root@master ~]# ssh-keygen
把本地的ssh公钥文件安装到远程主机对应的账户
[root@master ~]# ssh-copy-id master
[root@master ~]# ssh-copy-id slave1
[root@master ~]# ssh-copy-id slave2关闭防火墙&&关闭selinux
[root@master ~]# systemctl stop firewalld
[root@master ~]# systemctl disable firewalld
[root@master ~]# cat /etc/selinux/config
# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
# enforcing - SELinux security policy is enforced.
# permissive - SELinux prints warnings instead of enforcing.
# disabled - No SELinux policy is loaded.
SELINUX=disabled
# SELINUXTYPE= can take one of three two values:
# targeted - Targeted processes are protected,
# minimum - Modification of targeted policy. Only selected processes are protected.
# mls - Multi Level Security protection.
SELINUXTYPE=targeted开始安装
所有节点操作
下载链接: https://pan.baidu.com/s/1c2O1gIW 密码: 9s92
比对md5解压离线包
MD5 (k8s_images.tar.bz2) = b60ad6a638eda472b8ddcfa9006315ee
下载相关rpm 包还有相关 docker images. 并解压
[root@master ~]# tar xvf k8s_images.tar.gz2安装docker-ce
[root@master ~]# cd k8s_images/
[root@master k8s_images]# yum -y localinstall docker-ce-selinux-17.03.2.ce-1.el7.centos.noarch.rpm docker-ce-17.03.2.ce-1.el7.centos.x86_64.rpm 修改docker的镜像源为国内的daocloud（或者阿里云的都行）。
curl -sSL https://get.daocloud.io/daotools/set_mirror.sh | sh -s http://a58c8480.m.daocloud.io启动docker，并设置开机启动
[root@master ~]# systemctl start docker;systemctl enable docker配置系统路由参数,防止kubeadm报路由警告
[root@master ~]# echo "
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1vm.swappiness = 0" >> /etc/sysctl.conf[root@master ~]# sysctl -p
[root@master ~]# swapoff -a && sed -i '/swap/d' /etc/fstab #一定要删除swap，否则集群初始化不了（把/etc/fstab文件中swap那行也删掉，不然重启后又重新挂载了）安装kubadm kubelet kubectl
[root@master k8s_images]# yum -y localinstall kubectl-1.9.0-0.x86_64.rpm \kubeadm-1.9.0-0.x86_64.rpm kubelet-1.9.9-9.x86_64.rpm \kubernetes-cni-0.6.0-0.x86_64.rpm socat-1.7.3.2-2.el7.x86_64.rpm 加载镜像
[root@master k8s_images]# cd docker_images/
[root@master docker_images]# ll
total 999696
-rw-r--r-- 1 root root 192984064 Dec 26 11:32 etcd-amd64_v3.1.10.tar
-rw-r--r-- 1 root root 52185600 Dec 27 20:36 flannel:v0.9.1-amd64.tar
-rw-r--r-- 1 root root 41241088 Dec 27 20:34 k8s-dns-dnsmasq-nanny-amd64_v1.14.7.tar
-rw-r--r-- 1 root root 50545152 Dec 27 23:02 k8s-dns-kube-dns-amd64_1.14.7.tar
-rw-r--r-- 1 root root 42302976 Dec 27 22:59 k8s-dns-sidecar-amd64_1.14.7.tar
-rw-r--r-- 1 root root 210598400 Dec 26 11:28 kube-apiserver-amd64_v1.9.0.tar
-rw-r--r-- 1 root root 137975296 Dec 26 11:30 kube-controller-manager-amd64_v1.9.0.tar
-rw-r--r-- 1 root root 110955520 Dec 29 13:13 kube-proxy-amd64_v1.9.0.tar
-rw-r--r-- 1 root root 121195008 Jan 1 20:24 kubernetes-dashboard_v1.8.1.tar
-rw-r--r-- 1 root root 62920704 Dec 26 11:30 kube-scheduler-amd64_v1.9.0.tar
-rw-r--r-- 1 root root 765440 Dec 27 20:32 pause-amd64_3.0.tar
[root@master docker_images]# for image in `ls -l . | awk '{print $9}'`; \do echo "$image is loading" && docker load < ${image};donemaster 节点操作
#启动kubelet（这时候查看/var/log/messages日志，会发现有报错）
[root@master ~]# systemctl start kubelet && systemctl enable kubelet开始初始化master节点
kubernetes 默认支持多重网络插件如flannel、weave、calico，这里使用flannel，就必须设置–pod-network-cidr 参数，
[root@master ~]# kubeadm init --kubernetes-version=v1.9.0 --pod-network-cidr=10.224.0.0/16 --token-ttl=0参数说明
- --kubernetes-version 最好指定版本，否则会请求 https://storage.googleapis.com/kubernetes-release/release/stable-1.9.txt ，
- 如果没"翻""墙"，就超时报错
- --token-ttl 默认的token有效期24小时， 设置为0表示永不过期
Jan 20 15:22:53 huaicong-1 kubelet: E0120 15:22:53.551735 24627 reflector.go:205] k8s.io/kubernetes/pkg/kubelet/config/apiserver.go:47: Failed to list *v1.Pod: Get https://192.168.111.117:6443/api/v1/pods?fieldSelector=spec.nodeName%3Dhuaicong-1.novalocal&limit=500&resourceVersion=0: dial tcp 192.168.111.117:6443: getsockopt: connection refused
Jan 20 15:22:53 huaicong-1 kubelet: E0120 15:22:53.551845 24627 reflector.go:205] k8s.io/kubernetes/pkg/kubelet/kubelet.go:474: Failed to list *v1.Node: Get https://192.168.111.117:6443/api/v1/nodes?fieldSelector=metadata.name%3Dhuaicong-1.novalocal&limit=500&resourceVersion=0: dial tcp 192.168.111.117:6443: getsockopt: connection refused
Jan 20 15:22:53 huaicong-1 kubelet: W0120 15:22:53.557159 24627 kubelet_network.go:139] Hairpin mode set to "promiscuous-bridge" but kubenet is not enabled, falling back to "hairpin-veth"
Jan 20 15:22:53 huaicong-1 kubelet: I0120 15:22:53.557178 24627 kubelet.go:571] Hairpin mode set to "hairpin-veth"
Jan 20 15:22:53 huaicong-1 kubelet: W0120 15:22:53.557212 24627 cni.go:171] Unable to update cni config: No networks found in /etc/cni/net.d
Jan 20 15:22:53 huaicong-1 kubelet: I0120 15:22:53.557240 24627 client.go:80] Connecting to docker on unix:///var/run/docker.sock
Jan 20 15:22:53 huaicong-1 kubelet: I0120 15:22:53.557249 24627 client.go:109] Start docker client with request timeout=2m0s
Jan 20 15:22:53 huaicong-1 kubelet: W0120 15:22:53.559152 24627 cni.go:171] Unable to update cni config: No networks found in /etc/cni/net.d
Jan 20 15:22:53 huaicong-1 kubelet: W0120 15:22:53.581459 24627 cni.go:171] Unable to update cni config: No networks found in /etc/cni/net.d
Jan 20 15:22:53 huaicong-1 kubelet: I0120 15:22:53.581544 24627 docker_service.go:232] Docker cri networking managed by cni
Jan 20 15:22:53 huaicong-1 kubelet: I0120 15:22:53.599739 24627 docker_service.go:237] Docker Info: &{ID:FMCL:A6AR:LAHK:SS2I:2SJI:ZY73:HYS4:DRRU:AJI4:JOQM:L5XK:ZGLK Containers:0 ContainersRunning:0 ContainersPaused:0 ContainersStopped:0 Images:11 Driver:overlay DriverStatus:[[Backing Filesystem xfs] [Supports d_type true]] SystemStatus:[] Plugins:{Volume:[local] Network:[bridge host macvlan null overlay] Authorization:[] Log:[]} MemoryLimit:true SwapLimit:true KernelMemory:true CPUCfsPeriod:true CPUCfsQuota:true CPUShares:true CPUSet:true IPv4Forwarding:true BridgeNfIptables:true BridgeNfIP6tables:true Debug:false NFd:16 OomKillDisable:true NGoroutines:22 SystemTime:2018-01-20T15:22:53.586684761+08:00 LoggingDriver:json-file CgroupDriver:cgroupfs NEventsListener:0 KernelVersion:3.10.0-514.el7.x86_64 OperatingSystem:CentOS Linux 7 (Core) OSType:linux Architecture:x86_64 IndexServerAddress:https://index.docker.io/v1/ RegistryConfig:0xc420e63960 NCPU:2 MemTotal:3975086080 GenericResources:[] DockerRootDir:/var/lib/docker HTTPProxy: HTTPSProxy: NoProxy: Name:huaicong-1.novalocal Labels:[] ExperimentalBuild:false ServerVersion:17.03.2-ce ClusterStore: ClusterAdvertise: Runtimes:map[runc:{Path:docker-runc Args:[]}] DefaultRuntime:runc Swarm:{NodeID: NodeAddr: LocalNodeState:inactive ControlAvailable:false Error: RemoteManagers:[] Nodes:0 Managers:0 Cluster:0xc4201cb400} LiveRestoreEnabled:false Isolation: InitBinary:docker-init ContainerdCommit:{ID:4ab9917febca54791c5f071a9d1f404867857fcc Expected:4ab9917febca54791c5f071a9d1f404867857fcc} RuncCommit:{ID:54296cf40ad8143b62dbcaa1d90e520a2136ddfe Expected:54296cf40ad8143b62dbcaa1d90e520a2136ddfe} InitCommit:{ID:949e6fa Expected:949e6fa} SecurityOptions:[name=seccomp,profile=default]}
Jan 20 15:22:53 huaicong-1 kubelet: error: failed to run Kubelet: failed to create kubelet: misconfiguration: kubelet cgroup driver: "systemd" is different from docker cgroup driver: "cgroupfs"
Jan 20 15:22:53 huaicong-1 systemd: kubelet.service: main process exited, code=exited, status=1/FAILURE
Jan 20 15:22:53 huaicong-1 systemd: Unit kubelet.service entered failed state.
Jan 20 15:22:53 huaicong-1 systemd: kubelet.service failed.查看日志发现启动不了
原来是kubelet 的cgroup dirver 与 docker的不一样。docker默认使用cgroupfs（可以用docker info | grep cgroup查看当前docker驱动方式）,keubelet 默认使用systemd。
[root@master ~]# vim /etc/systemd/system/kubelet.service.d/10-kubeadm.conf
[Service]
Environment="KUBELET_KUBECONFIG_ARGS=--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.conf --kubeconfig=/etc/kubernetes/kubelet.conf"
Environment="KUBELET_SYSTEM_PODS_ARGS=--pod-manifest-path=/etc/kubernetes/manifests --allow-privileged=true"
Environment="KUBELET_NETWORK_ARGS=--network-plugin=cni --cni-conf-dir=/etc/cni/net.d --cni-bin-dir=/opt/cni/bin"
Environment="KUBELET_DNS_ARGS=--cluster-dns=10.96.0.10 --cluster-domain=cluster.local"
Environment="KUBELET_AUTHZ_ARGS=--authorization-mode=Webhook --client-ca-file=/etc/kubernetes/pki/ca.crt"
Environment="KUBELET_CADVISOR_ARGS=--cadvisor-port=0"
Environment="KUBELET_CGROUP_ARGS=--cgroup-driver=cgroupfs"
Environment="KUBELET_CERTIFICATE_ARGS=--rotate-certificates=true --cert-dir=/var/lib/kubelet/pki"
ExecStart=
ExecStart=/usr/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_SYSTEM_PODS_ARGS $KUBELET_NETWORK_ARGS $KUBELET_DNS_ARGS $KUBELET_AUTHZ_ARGS $KUBELET_CADVISOR_ARGS $KUBELET_CGROUP_ARGS $KUBELET_CERTIFICATE_ARGS $KUBELET_EXTRA_ARGSsystemctl daemon-reload && systemctl restart kubelet
&& systemctl enable kubelet
[root@master ~]# kubeadm init --kubernetes-version=v1.9.0 --pod-network-cidr=10.244.0.0/16
[init] Using Kubernetes version: v1.9.0
[init] Using Authorization modes: [Node RBAC]
[preflight] Running pre-flight checks.
[WARNING Hostname]: hostname "huaicong-1.novalocal" could not be reached
[WARNING Hostname]: hostname "huaicong-1.novalocal" lookup huaicong-1.novalocal on 8.8.4.4:53: no such host
[WARNING FileExisting-crictl]: crictl not found in system path
[preflight] Starting the kubelet service
[certificates] Generated ca certificate and key.
[certificates] Generated apiserver certificate and key.
[certificates] apiserver serving cert is signed for DNS names [huaicong-1.novalocal kubernetes kubernetes.default kubernetes.default.svc kubernetes.default.svc.cluster.local] and IPs [10.96.0.1 192.168.111.117]
[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 "/etc/kubernetes/pki"
[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"
[controlplane] Wrote Static Pod manifest for component kube-apiserver to "/etc/kubernetes/manifests/kube-apiserver.yaml"
[controlplane] Wrote Static Pod manifest for component kube-controller-manager to "/etc/kubernetes/manifests/kube-controller-manager.yaml"
[controlplane] Wrote Static Pod manifest for component kube-scheduler to "/etc/kubernetes/manifests/kube-scheduler.yaml"
[etcd] Wrote Static Pod manifest for a local etcd instance to "/etc/kubernetes/manifests/etcd.yaml"
[init] Waiting for the kubelet to boot up the control plane as Static Pods from directory "/etc/kubernetes/manifests".
[init] This might take a minute or longer if the control plane images have to be pulled.
[apiclient] All control plane components are healthy after 30.001793 seconds
[uploadconfig] Storing the configuration used in ConfigMap "kubeadm-config" in the "kube-system" Namespace
[markmaster] Will mark node huaicong-1.novalocal as master by adding a label and a taint
[markmaster] Master huaicong-1.novalocal tainted and labelled with key/value: node-role.kubernetes.io/master=""
[bootstraptoken] Using token: 7529d9.235a9be16773cad7
[bootstraptoken] Configured RBAC rules to allow Node Bootstrap tokens to post CSRs in order for nodes to get long term certificate credentials
[bootstraptoken] Configured RBAC rules to allow the csrapprover controller automatically approve CSRs from a Node Bootstrap Token
[bootstraptoken] Configured RBAC rules to allow certificate rotation for all node client certificates in the cluster
[bootstraptoken] Creating the "cluster-info" ConfigMap in the "kube-public" namespace
[addons] Applied essential addon: kube-dns
[addons] Applied essential addon: kube-proxy
Your Kubernetes master has initialized successfully!
To start using your cluster, you need to run the following as a regular user:
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/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:
https://kubernetes.io/docs/concepts/cluster-administration/addons/
You can now join any number of machines by running the following on each node
as root:
kubeadm join --token 7529d9.235a9be16773cad7 192.168.111.117:6443 --discovery-token-ca-cert-hash sha256:5cde22b6b719d1af19c711b87016163baafd38e5588786ebd4a2b975a07439fdkubeadm join xxxx 要保留下来（当前版本无法回显，以后要添加找不到就尴尬了）
如果忘记了，可以通过kubeadm token list 获取（但这个不全，无法用来添加新节点）
[root@master k8s_images]# kubeadm token list
TOKEN TTL EXPIRES USAGES DESCRIPTION EXTRA GROUPS
7529d9.235a9be16773cad7 21h 2018-01-21T16:00:46+08:00 authentication,signing The default bootstrap token generated by 'kubeadm init'. system:bootstrappers:kubeadm:default-node-token###由于安全原因，默认情况下pod不会被schedule到master节点上，可以通过下面命令解除这种限制：
kubectl taint nodes --all node-role.kubernetes.io/master-按照上面提示，此时还不能用kubectl 控制集群。需要配置环境变量
mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config查看kubectl版本信息
[root@master k8s_images]# kubectl version
Client Version: version.Info{Major:"1", Minor:"9", GitVersion:"v1.9.0", GitCommit:"925c127ec6b946659ad0fd596fa959be43f0cc05", GitTreeState:"clean", BuildDate:"2017-12-15T21:07:38Z", GoVersion:"go1.9.2", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"9", GitVersion:"v1.9.0", GitCommit:"925c127ec6b946659ad0fd596fa959be43f0cc05", GitTreeState:"clean", BuildDate:"2017-12-15T20:55:30Z", GoVersion:"go1.9.2", Compiler:"gc", Platform:"linux/amd64"}安装网络，可用使用flannel、macvlan、calico、weave，这里我们使用flannel。
#下载此文件
wget https://raw.githubusercontent.com/coreos/flannel/v0.9.1/Documentation/kube-flannel.yml或直接使用离线包里面的
若要修改网段，需要kubeadm –pod-network-cidr=和这里同步，修改network项。
vim kube-flannel.yml
net-conf.json: |
64 {
65 "Network": "10.244.0.0/16",
66 "Backend": {
67 "Type": "vxlan"
68 }
69 }执行
kubectl create -f kube-flannel.yml查看所pod状态，已经都running
[root@master k8s_images]# kubectl get pod --all-namespaces
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system etcd-huaicong-1.novalocal 1/1 Running 0 2h
kube-system kube-apiserver-huaicong-1.novalocal 1/1 Running 0 2h
kube-system kube-controller-manager-huaicong-1.novalocal 1/1 Running 0 2h
kube-system kube-dns-6f4fd4bdf-j9gd4 3/3 Running 0 2h
kube-system kube-flannel-ds-jb66l 1/1 Running 0 25s
kube-system kube-proxy-clhpp 1/1 Running 0 2h
kube-system kube-scheduler-huaicong-1.novalocal 1/1 Running 0 2h部署kubernetes-dashboard
kubernetes-dashboard是可选组件，因为，实在不好用，功能太弱了。
建议在部署master时一起把kubernetes-dashboard一起部署了,不然在node节点加入集群后，kubernetes-dashboard会被kube-scheduler调度node节点上，这样根kube-apiserver通信需要额外配置。
下载kubernetes-dashboard的配置文件或直接使用离线包里面的kubernetes-dashboard.yaml
[root@master k8s_images]# kubectl create -f kubernetes-dashboard.yaml
[root@master k8s_images]# kubectl get pod --all-namespaces
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system etcd-huaicong-1.novalocal 1/1 Running 0 2h
kube-system kube-apiserver-huaicong-1.novalocal 1/1 Running 0 2h
kube-system kube-controller-manager-huaicong-1.novalocal 1/1 Running 0 2h
kube-system kube-dns-6f4fd4bdf-j9gd4 3/3 Running 0 2h
kube-system kube-flannel-ds-jb66l 1/1 Running 0 25m
kube-system kube-proxy-clhpp 1/1 Running 0 2h
kube-system kube-scheduler-huaicong-1.novalocal 1/1 Running 0 2h
kube-system kubernetes-dashboard-58f5cb49c-m4f5z 1/1 Running 0 27s[root@master k8s_images]# kubectl proxy --address=masterip --accept-hosts='^*$'访问 http://masterip:8001/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy
node节点操作
修改kubelet配置文件cgroup的driver由systemd改为cgroupfs
vim /etc/systemd/system/kubelet.service.d/10-kubeadm.conf
Environment=”KUBELET_CGROUP_ARGS=–cgroup-driver=cgroupfs”systemctl daemon-reload
systemctl enable kubelet&&systemctl restart kubelet使用刚刚执行kubeadm后的kubeadm join –xxx
kubeadm join --token 6c5a50.4fc04fd2f05054ed 192.168.111.123:6443 --discovery-token-ca-cert-hash sha256:fb12670b0c600f310f6d18dae6b19ce7145069afd613dea46bf15be6611306e4在master节点上检查一下
[root@master ~]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
master Ready master 14h v1.9.0
slave1 Ready 25s v1.9.0
slave2 Ready 25s v1.9.0测试集群
在master节点上发起个创建应用请求
这里我们创建个名为httpd-app的应用，镜像为httpd，有两个副本pod
kubectl run httpd-app --image=httpd --replicas=2[root@master ~]# kubectl get deployment
NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE
httpd-app 2 2 2 2 13m[root@master ~]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE
httpd-app-5fbccd7c6c-bbl2c 1/1 Running 0 14m 10.244.1.3 slave1
httpd-app-5fbccd7c6c-ksw9b 1/1 Running 0 14m 10.244.1.4 slave2因为创建的资源不是service所以不会调用kube-proxy
直接访问测试
[root@master ~]# curl http://10.244.1.3
<html><body><h1>It works!h1>body>html>
[root@master ~]# curl http://10.244.1.4
<html><body><h1>It works!h1>body>html>删除应用httpd-app
[root@master ~]# kubectl delete deployment httpd-app
[root@master ~]# kubectl get pods
NAME READY STATUS RESTARTS AGE
httpd-app-5fbccd7c6c-bbl2c 0/1 Terminating 0 56m
httpd-app-5fbccd7c6c-ksw9b 0/1 Terminating 0 56m至此kubernetes基本集群安装完成。
heapster插件部署
下面安装Heapster为集群添加使用统计和监控功能，为Dashboard添加仪表盘。 使用InfluxDB做为Heapster的后端存储，开始部署：
使用到的镜像
mkdir -p ~/k8s/heapster
cd ~/k8s/heapster
wget https://raw.githubusercontent.com/kubernetes/heapster/master/deploy/kube-config/influxdb/grafana.yaml
wget https://raw.githubusercontent.com/kubernetes/heapster/master/deploy/kube-config/rbac/heapster-rbac.yaml
wget https://raw.githubusercontent.com/kubernetes/heapster/master/deploy/kube-config/influxdb/heapster.yaml
wget https://raw.githubusercontent.com/kubernetes/heapster/master/deploy/kube-config/influxdb/influxdb.yaml
kubectl create -f ./最后确认所有的pod都处于running状态，打开Dashboard,集群的使用统计会以仪表盘的形式显示出来
本涉及到安装的镜像
gcr.io/google_containers/kube-proxy-amd64:v1.9.0
gcr.io/google_containers/kube-apiserver-amd64:v1.9.0
gcr.io/google_containers/kube-controller-manager-amd64:v1.9.0
gcr.io/google_containers/kube-scheduler-amd64:v1.9.0
quay.io/coreos/flannel:v0.9.1-amd64
gcr.io/google_containers/k8s-dns-sidecar-amd64:1.14.7
gcr.io/google_containers/k8s-dns-kube-dns-amd64:1.14.7
gcr.io/google_containers/k8s-dns-dnsmasq-nanny-amd64:1.14.7
gcr.io/google_containers/etcd-amd64:3.1.10
gcr.io/google_containers/pause-amd64:3.0
gcr.io/google_containers/kubernetes-dashboard-amd64:v1.8.1
gcr.io/google_containers/heapster-influxdb-amd64:v1.3.3
gcr.io/google_containers/heapster-grafana-amd64:v4.4.3
gcr.io/google_containers/heapster-amd64:v1.4.2