K8S 升级V1.14.0

1、查看该版本的容器镜像版本：

kubeadm config images list
输出如下：

~# kubeadm config images listk8s.gcr.io/kube-apiserver:v1.14.0k8s.gcr.io/kube-controller-manager:v1.14.0k8s.gcr.io/kube-scheduler:v1.14.0k8s.gcr.io/kube-proxy:v1.14.0k8s.gcr.io/pause:3.1k8s.gcr.io/etcd:3.3.10k8s.gcr.io/coredns:1.3.1 

2、拉取容器镜像

原始的kubernetes镜像文件在gcr上，不能直接下载。下面是阿里云上的资源，所有主机上都执行一下（master和node上都执行该脚本）。

echo ""echo "=========================================================="echo "Pull Kubernetes v1.14.0 Images from aliyuncs.com ......"echo "=========================================================="echo ""MY_REGISTRY=registry.cn-hangzhou.aliyuncs.com/openthings## 拉取镜像docker pull ${MY_REGISTRY}/k8s-gcr-io-kube-apiserver:v1.14.0docker pull ${MY_REGISTRY}/k8s-gcr-io-kube-controller-manager:v1.14.0docker pull ${MY_REGISTRY}/k8s-gcr-io-kube-scheduler:v1.14.0docker pull ${MY_REGISTRY}/k8s-gcr-io-kube-proxy:v1.14.0docker pull ${MY_REGISTRY}/k8s-gcr-io-etcd:3.3.10docker pull ${MY_REGISTRY}/k8s-gcr-io-pause:3.1docker pull ${MY_REGISTRY}/k8s-gcr-io-coredns:1.3.1## 添加Tagdocker tag ${MY_REGISTRY}/k8s-gcr-io-kube-apiserver:v1.14.0 k8s.gcr.io/kube-apiserver:v1.14.0docker tag ${MY_REGISTRY}/k8s-gcr-io-kube-scheduler:v1.14.0 k8s.gcr.io/kube-scheduler:v1.14.0docker tag ${MY_REGISTRY}/k8s-gcr-io-kube-controller-manager:v1.14.0 k8s.gcr.io/kube-controller-manager:v1.14.0docker tag ${MY_REGISTRY}/k8s-gcr-io-kube-proxy:v1.14.0 k8s.gcr.io/kube-proxy:v1.14.0docker tag ${MY_REGISTRY}/k8s-gcr-io-etcd:3.3.10 k8s.gcr.io/etcd:3.3.10docker tag ${MY_REGISTRY}/k8s-gcr-io-pause:3.1 k8s.gcr.io/pause:3.1docker tag ${MY_REGISTRY}/k8s-gcr-io-coredns:1.3.1 k8s.gcr.io/coredns:1.3.1docker rmi ${MY_REGISTRY}/k8s-gcr-io-kube-apiserver:v1.14.0docker rmi ${MY_REGISTRY}/k8s-gcr-io-kube-controller-manager:v1.14.0docker rmi ${MY_REGISTRY}/k8s-gcr-io-kube-scheduler:v1.14.0docker rmi ${MY_REGISTRY}/k8s-gcr-io-kube-proxy:v1.14.0docker rmi ${MY_REGISTRY}/k8s-gcr-io-etcd:3.3.10docker rmi ${MY_REGISTRY}/k8s-gcr-io-pause:3.1docker rmi ${MY_REGISTRY}/k8s-gcr-io-coredns:1.3.1echo ""echo "=========================================================="echo "Pull Kubernetes v1.14.0 Images FINISHED."echo "into registry.cn-hangzhou.aliyuncs.com/openthings, "echo "=========================================================="echo ""

保存为shell脚本，然后执行。

3、升级Kubernetes集群

先查看一下需要升级的各个组件的版本。
使用kubeadm upgrade plan ，输出的版本升级信息如下：

COMPONENT            CURRENT   AVAILABLEAPI Server           v1.13.4   v1.14.0Controller Manager   v1.13.4   v1.14.0Scheduler            v1.13.4   v1.14.0Kube Proxy           v1.13.4   v1.14.0CoreDNS              1.2.6     1.3.1Etcd                 3.2.24    3.3.10

确保上面的容器镜像已经下载（如果没有提前下载，可能被网络阻隔导致挂起），然后在master上执行升级（我使用的是1个master，2个node的模式。如果是多个master需要在所有master上执行）：
kubeadm upgrade -y apply v1.14.0
看到下面信息，就OK了。
[upgrade/successful] SUCCESS! Your cluster was upgraded to "v1.14.0". Enjoy!