Kubernetes 1.12.3快速升級

時間 2019-11-06

標籤 kubernetes 1.12.3 快速升級简体版

原文原文鏈接

Kubernetes 1.12.3已經正式發佈，快速升級（含國內鏡像快速下載連接）包括升級kubeadm/kubectl/kubelet版本、拉取鏡像、升級Kubernetes集羣三個主要步驟。注意Kubernetes 1.12.3版本暫時不支持最新的Docker 18.09，只能用Docker 18.06及如下版本，參考《Ubuntu上軟件鎖定版本不更新》安裝特定DockerCE版本。linux

一、升級kubeadm/kubectl/kubelet版本

sudo apt install kubeadm=1.12.3-00 kubectl=1.12.3-00 kubelet=1.12.3-00

查看該版本的容器鏡像版本：ios

kubeadm config images list

輸出以下：git

~# kubeadm config images list

k8s.gcr.io/kube-apiserver:v1.12.3
k8s.gcr.io/kube-controller-manager:v1.12.3
k8s.gcr.io/kube-scheduler:v1.12.3
k8s.gcr.io/kube-proxy:v1.12.3
k8s.gcr.io/pause:3.1
k8s.gcr.io/etcd:3.2.24
k8s.gcr.io/coredns:1.2.2

二、拉取容器鏡像

原始的kubernetes鏡像文件在gcr上，不能直接下載。我給鏡像到了阿里雲的杭州機房的容器倉庫裏，拉取仍是比較快的。github

echo ""
echo "=========================================================="
echo "Pull Kubernetes v1.12.2 Images from aliyuncs.com ......"
echo "=========================================================="
echo ""

MY_REGISTRY=registry.cn-hangzhou.aliyuncs.com/openthings

## 拉取鏡像
docker pull ${MY_REGISTRY}/k8s-gcr-io-kube-apiserver:v1.12.3
docker pull ${MY_REGISTRY}/k8s-gcr-io-kube-controller-manager:v1.12.3
docker pull ${MY_REGISTRY}/k8s-gcr-io-kube-scheduler:v1.12.3
docker pull ${MY_REGISTRY}/k8s-gcr-io-kube-proxy:v1.12.3
docker pull ${MY_REGISTRY}/k8s-gcr-io-etcd:3.2.24
docker pull ${MY_REGISTRY}/k8s-gcr-io-pause:3.1
docker pull ${MY_REGISTRY}/k8s-gcr-io-coredns:1.2.2


## 添加Tag
docker tag ${MY_REGISTRY}/k8s-gcr-io-kube-apiserver:v1.12.3 k8s.gcr.io/kube-apiserver:v1.12.3
docker tag ${MY_REGISTRY}/k8s-gcr-io-kube-scheduler:v1.12.3 k8s.gcr.io/kube-scheduler:v1.12.3
docker tag ${MY_REGISTRY}/k8s-gcr-io-kube-controller-manager:v1.12.3 k8s.gcr.io/kube-controller-manager:v1.12.3
docker tag ${MY_REGISTRY}/k8s-gcr-io-kube-proxy:v1.12.3 k8s.gcr.io/kube-proxy:v1.12.3
docker tag ${MY_REGISTRY}/k8s-gcr-io-etcd:3.2.24 k8s.gcr.io/etcd:3.2.24
docker tag ${MY_REGISTRY}/k8s-gcr-io-pause:3.1 k8s.gcr.io/pause:3.1
docker tag ${MY_REGISTRY}/k8s-gcr-io-coredns:1.2.2 k8s.gcr.io/coredns:1.2.2

echo ""
echo "=========================================================="
echo "Pull Kubernetes v1.12.3 Images FINISHED."
echo "into registry.cn-hangzhou.aliyuncs.com/openthings, "
echo "           by openthings@https://my.oschina.net/u/2306127."
echo "=========================================================="

echo ""

保存爲shell腳本，而後執行。docker

或者，下載腳本：https://github.com/openthings/kubernetes-tools/blob/master/kubeadm/2-images/
或者，從這裏下載：打包的Kubernetes 1.12.3鏡像文件，而後docker load便可。

三、升級Kubernetes集羣

先查看一下須要升級的各個組件的版本。shell

使用kubeadm upgrade plan ，輸出的版本升級信息以下：api

COMPONENT            CURRENT   AVAILABLE
API Server           v1.11.2   v1.12.3
Controller Manager   v1.11.2   v1.12.3
Scheduler            v1.11.2   v1.12.3
Kube Proxy           v1.11.2   v1.12.3
CoreDNS              1.1.3     1.2.2
Etcd                 3.2.18    3.2.24

確保上面的容器鏡像已經下載（若是沒有提早下載，可能被網絡阻隔致使掛起），而後執行升級：網絡

kubeadm upgrade -y apply v1.12.3

看到下面信息，就OK了。app

[upgrade/successful] SUCCESS! Your cluster was upgraded to "v1.12.3". Enjoy!

四、工做節點的升級

每一個工做節點須要拉取上面對應版本的鏡像，以及安裝kubelet的對應版本。ui

檢查版本：

~$ kubectl version

Client Version: version.Info{Major:"1", Minor:"12", GitVersion:"v1.12.3", 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:"v1.12.3", GitCommit:"4ed3216f3ec431b140b1d899130a69fc671678f4", GitTreeState:"clean", BuildDate:"2018-10-05T16:36:14Z", GoVersion:"go1.10.4", Compiler:"gc", Platform:"linux/amd64"}

查看Pod信息：