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这篇文章主要为大家展示了"Kubernetes 1.12.1如何快速升级"，内容简而易懂，条理清晰，希望能够帮助大家解决疑惑，下面让小编带领大家一起研究并学习一下"Kubernetes 1.12.1如何快速升级"这篇文章吧。

Kubernetes 1.12.1快速升级，包括升级kubeadm/kubectl/kubelet版本、拉取镜像、升级Kubernetes集群三个主要步骤。

1、升级kubeadm/kubectl/kubelet版本sudo apt install kubeadm=1.12.1-00 kubectl=1.12.1-00 kubelet=1.12.1-00

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:v1.12.1k8s.gcr.io/kube-controller-manager:v1.12.1k8s.gcr.io/kube-scheduler:v1.12.1k8s.gcr.io/kube-proxy:v1.12.1k8s.gcr.io/pause:3.1k8s.gcr.io/etcd:3.2.24k8s.gcr.io/coredns:1.2.22、拉取容器镜像

我给镜像到了杭州机房的容器仓库里，拉取还是比较快的。

echo ""echo "=========================================================="echo "Pull Kubernetes v1.12.1 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:v1.12.1docker pull ${MY_REGISTRY}/k8s-gcr-io-kube-controller-manager:v1.12.1docker pull ${MY_REGISTRY}/k8s-gcr-io-kube-scheduler:v1.12.1docker pull ${MY_REGISTRY}/k8s-gcr-io-kube-proxy:v1.12.1docker pull ${MY_REGISTRY}/k8s-gcr-io-etcd:3.2.24docker pull ${MY_REGISTRY}/k8s-gcr-io-pause:3.1docker pull ${MY_REGISTRY}/k8s-gcr-io-coredns:1.2.2## 添加Tagdocker tag ${MY_REGISTRY}/k8s-gcr-io-kube-apiserver:v1.12.1 k8s.gcr.io/kube-apiserver:v1.12.1docker tag ${MY_REGISTRY}/k8s-gcr-io-kube-scheduler:v1.12.1 k8s.gcr.io/kube-scheduler:v1.12.1docker tag ${MY_REGISTRY}/k8s-gcr-io-kube-controller-manager:v1.12.1 k8s.gcr.io/kube-controller-manager:v1.12.1docker tag ${MY_REGISTRY}/k8s-gcr-io-kube-proxy:v1.12.1 k8s.gcr.io/kube-proxy:v1.12.1docker tag ${MY_REGISTRY}/k8s-gcr-io-etcd:3.2.24 k8s.gcr.io/etcd:3.2.24docker tag ${MY_REGISTRY}/k8s-gcr-io-pause:3.1 k8s.gcr.io/pause:3.1docker tag ${MY_REGISTRY}/k8s-gcr-io-coredns:1.2.2 k8s.gcr.io/coredns:1.2.2echo ""echo "=========================================================="echo "Pull Kubernetes v1.12.1 Images FINISHED."echo "into registry.cn-hangzhou.aliyuncs.com/openthings, "echo " by openthings@https://my.oschina.net/u/2306127."echo "=========================================================="echo ""

保存为shell脚本，然后执行。

或者，下载脚本：https://github.com/openthings/kubernetes-tools/blob/master/kubeadm/2-images/

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 v1.11.2 v1.12.1Controller Manager v1.11.2 v1.12.1Scheduler v1.11.2 v1.12.1Kube Proxy v1.11.2 v1.12.1CoreDNS 1.1.3 1.2.2Etcd 3.2.18 3.2.24

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），然后执行升级：

kubeadm upgrade apply v1.12.1

看到下面信息，就OK了。

[upgrade/successful] SUCCESS! Your cluster was upgraded to "v1.12.1". Enjoy!4、工作节点的升级

每个工作节点需要拉取上面对应版本的镜像，以及安装kubelet的对应版本。

Verify~$ kubectl versionClient Version: version.Info{Major:"1", Minor:"12", GitVersion:"v1.12.1", GitCommit:"4ed3216f3ec431b140b1d899130a69fc671678f4", GitTreeState:"clean", BuildDate:"2018-10-05T16:46:06Z", GoVersion:"go1.10.4", Compiler:"gc", Platform:"linux/amd64"}Server Version: version.Info{Major:"1", Minor:"12", GitVersion:"v1.12.1", GitCommit:"4ed3216f3ec431b140b1d899130a69fc671678f4", GitTreeState:"clean", BuildDate:"2018-10-05T16:36:14Z", GoVersion:"go1.10.4", Compiler:"gc", Platform:"linux/amd64"}

Get Pod

kubectl get pod --all-namespaces

view list.

以上是"Kubernetes 1.12.1如何快速升级"这篇文章的所有内容，感谢各位的阅读!相信大家都有了一定的了解，希望分享的内容对大家有所帮助，如果还想学习更多知识，欢迎关注行业资讯频道!

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