RKE 升级kubernetes 版本
2024-05-15 19:21:14
公司使用的kubernetes测试环境，已经很久没有升级了，1.16.3版本已经很旧了，需要升级到1.20.6进行测试。
先决条件#
- 保证
cluster.yml缺少system_images的说明和配置。如果您使用的是RKE 不支持的 Kubernetes 版本，则要保证只在system——images中说明 Kubernetes 版本号。详情请参考Kubernetes 版本优先级。
保证工作目录中有管理Kubernetes 集群状态所需的文件，不同版本的 RKE 使用不同的文件管理 Kubernetes 集群状态。
RKE v0.2.0 及更新版本
RKE v0.2.0 及以上的版本使用
cluster.rkestate文件管理集群状态。cluster.rkestate文件中含有集群的当前状态，包括 RKE 配置和证书等信息。这个文件和
cluster.yml位于同一目录下。cluster.rkestate文件非常重要，控制集群和升级集群的时候都需要用到这个文件，请妥善保管该文件。RKE v0.2.0 之前的版本
请保证工作目录中含有
kube_config_cluster.yml文件RKE 以密文的方式保存 Kubernetes 集群状态。编辑集群状态时，RKE 拉取密文，变更集群状态，然后将变更后的状态以密文的方式保存到
kube_config_cluster.yml文件中。如果您使用的是 RKE v0.2.0 之前的版本，请妥善保管该文件。
| kubernetes | 当前版本 | 期望升级的版本 |
| 版本 | 1.16.3 | 1.20.6 |
kubernetes集群情况
| 节点 | IP | docker版本 | 系统版本 |
| master | 10.5.38.228 | 18.9.6 | centos7.6 |
| master | 10.5.38.239 | 18.9.6 | centos7.6 |
| master | 10.5.38.140 | 18.9.6 | centos7.6 |
| worker | 10.5.38.157 | 18.9.6 | centos7.6 |
| worker | 10.5.38.223 | 18.9.6 | centos7.6 |
查看当前kubernetes 集群版本和kubectl版本
[rancher@xr-prelocus ~]$ kubectl version
Client Version: version.Info{Major:"1", Minor:"16", GitVersion:"v1.16.3", GitCommit:"b3cbbae08ec52a7fc73d334838e18d17e8512749", GitTreeState:"clean", BuildDate:"2019-11-13T11:23:11Z", GoVersion:"go1.12.12", Compiler:"gc", Platform:"linux/amd64"}
The connection to the server localhost:8080 was refused - did you specify the right host or port?检查当前RKE版本及支持的kubernetes 版本
centos@xr-prelocus:[/home/centos]rke --version
rke version v1.0.0
centos@xr-prelocus:[/home/centos]rke config --list-version --all
v1.14.9-rancher1-1
v1.15.6-rancher1-2
v1.16.3-rancher1-1由于当前的RKE版本不支持1.20.6版本，需要到
https://github.com/rancher/rke/releases下载支持1.20.6版本的rke
同时需要到https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.20.md#server-binaries-1下载kubernetes的客户端命令行工具kubectl
操作命令如下
centos@xr-prelocus:[/home/centos]ls
rke_linux-amd64 (3)
centos@xr-prelocus:[/home/centos]mv rke_linux-amd64\ \(3\) rke
centos@xr-prelocus:[/home/centos]ls
rke
//添加执行权限
centos@xr-prelocus:[/home/centos]chmod +x rke
centos@xr-prelocus:[/home/centos]ls
rke
//提升用户权限
centos@xr-prelocus:[/home/centos]sudo -i
//备份原RKE命令行
[root@xr-prelocus centos]# mv /bin/rke /bin/rke.bak
//移动RKE到/bin目录
[root@xr-prelocus centos]# mv rke /bin/
[root@xr-prelocus centos]# exit
exit
//退出root账户，查看rke版本和支持的kubernetes版本
centos@xr-prelocus:[/home/centos]rke --version
rke version v1.2.8
centos@xr-prelocus:[/home/centos]rke config --list-version --all
v1.19.10-rancher1-1
v1.18.18-rancher1-2
v1.17.17-rancher2-3
v1.20.6-rancher1-1检查三个文件是否存在cluster.yml cluster.rkestate kube_config_cluster.yml
[rancher@xr-prelocus ~]$ ls cluster.rkestate kube_config_cluster.yml cluster.yml
cluster.rkestate cluster.yml kube_config_cluster.yml修改cluster.yml 文件kubernetes的版本为1.20.6
开始升级
[rancher@xr-prelocus ~]$ rke up
INFO[0000] Running RKE version: v1.2.8
INFO[0000] Initiating Kubernetes cluster
INFO[0000] [certificates] GenerateServingCertificate is disabled, checking if there are unused kubelet certificates
INFO[0000] [certificates] Generating admin certificates and kubeconfig
INFO[0000] Successfully Deployed state file at [./cluster.rkestate]
INFO[0000] Building Kubernetes cluster
INFO[0000] [dialer] Setup tunnel for host [10.5.38.223]
INFO[0000] [dialer] Setup tunnel for host [10.5.38.239]
INFO[0000] [dialer] Setup tunnel for host [10.5.38.140]
INFO[0000] [dialer] Setup tunnel for host [10.5.38.157]
INFO[0000] [dialer] Setup tunnel for host [10.5.38.52]
INFO[0000] [dialer] Setup tunnel for host [10.5.38.228]
INFO[0001] [network] No hosts added existing cluster, skipping port check
INFO[0001] [certificates] Deploying kubernetes certificates to Cluster nodes
INFO[0001] Checking if container [cert-deployer] is running on host [10.5.38.223], try #1
INFO[0001] Checking if container [cert-deployer] is running on host [10.5.38.157], try #1
INFO[0001] Checking if container [cert-deployer] is running on host [10.5.38.52], try #1
INFO[0001] Checking if container [cert-deployer] is running on host [10.5.38.228], try #1
INFO[0001] Checking if container [cert-deployer] is running on host [10.5.38.239], try #1
INFO[0001] Checking if container [cert-deployer] is running on host [10.5.38.140], try #1
INFO[0001] Pulling image [rancher/rke-tools:v0.1.74] on host [10.5.38.157], try #1
INFO[0001] Pulling image [rancher/rke-tools:v0.1.74] on host [10.5.38.223], try #1
INFO[0001] Pulling image [rancher/rke-tools:v0.1.74] on host [10.5.38.52], try #1
INFO[0001] Pulling image [rancher/rke-tools:v0.1.74] on host [10.5.38.140], try #1
INFO[0001] Pulling image [rancher/rke-tools:v0.1.74] on host [10.5.38.239], try #1
INFO[0001] Pulling image [rancher/rke-tools:v0.1.74] on host [10.5.38.228], try #1
INFO[0006] Pulling image [rancher/rke-tools:v0.1.74] on host [10.5.38.157], try #1
INFO[0006] Pulling image [rancher/rke-tools:v0.1.74] on host [10.5.38.140], try #1
INFO[0026] Image [rancher/rke-tools:v0.1.74] exists on host [10.5.38.239]
INFO[0026] Starting container [cert-deployer] on host [10.5.38.239], try #1
INFO[0027] Checking if container [cert-deployer] is running on host [10.5.38.239], try #1
INFO[0031] Image [rancher/rke-tools:v0.1.74] exists on host [10.5.38.52]
INFO[0031] Starting container [cert-deployer] on host [10.5.38.52], try #1
INFO[0031] Checking if container [cert-deployer] is running on host [10.5.38.52], try #1
INFO[0032] Checking if container [cert-deployer] is running on host [10.5.38.239], try #1
INFO[0032] Removing container [cert-deployer] on host [10.5.38.239], try #1
INFO[0033] Image [rancher/rke-tools:v0.1.74] exists on host [10.5.38.140]
INFO[0035] Image [rancher/rke-tools:v0.1.74] exists on host [10.5.38.157]
INFO[0036] Checking if container [cert-deployer] is running on host [10.5.38.52], try #1
INFO[0036] Removing container [cert-deployer] on host [10.5.38.52], try #1
INFO[0037] Image [rancher/rke-tools:v0.1.74] exists on host [10.5.38.228]
INFO[0037] Starting container [cert-deployer] on host [10.5.38.228], try #1
INFO[0037] Image [rancher/rke-tools:v0.1.74] exists on host [10.5.38.223]
INFO[0037] Starting container [cert-deployer] on host [10.5.38.223], try #1 持续不到10分钟左右就升级完成
INFO[1057] [worker] Now checking status of node 10.5.38.223, try #1
INFO[1057] [worker] Successfully upgraded Worker Plane..
INFO[1057] Image [rancher/rke-tools:v0.1.74] exists on host [10.5.38.52]
INFO[1057] Image [rancher/rke-tools:v0.1.74] exists on host [10.5.38.223]
INFO[1057] Image [rancher/rke-tools:v0.1.74] exists on host [10.5.38.140]
INFO[1057] Image [rancher/rke-tools:v0.1.74] exists on host [10.5.38.157]
INFO[1057] Image [rancher/rke-tools:v0.1.74] exists on host [10.5.38.239]
INFO[1057] Starting container [rke-log-cleaner] on host [10.5.38.52], try #1
INFO[1057] Starting container [rke-log-cleaner] on host [10.5.38.223], try #1
INFO[1057] Image [rancher/rke-tools:v0.1.74] exists on host [10.5.38.228]
INFO[1058] Starting container [rke-log-cleaner] on host [10.5.38.239], try #1
INFO[1058] Starting container [rke-log-cleaner] on host [10.5.38.157], try #1
INFO[1058] [cleanup] Successfully started [rke-log-cleaner] container on host [10.5.38.223]
INFO[1058] Removing container [rke-log-cleaner] on host [10.5.38.223], try #1
INFO[1058] Starting container [rke-log-cleaner] on host [10.5.38.228], try #1
INFO[1058] [cleanup] Successfully started [rke-log-cleaner] container on host [10.5.38.52]
INFO[1058] [cleanup] Successfully started [rke-log-cleaner] container on host [10.5.38.239]
INFO[1058] Removing container [rke-log-cleaner] on host [10.5.38.239], try #1
INFO[1058] [remove/rke-log-cleaner] Successfully removed container on host [10.5.28.223]
INFO[1058] Starting container [rke-log-cleaner] on host [10.5.38.140], try #1
INFO[1058] [cleanup] Successfully started [rke-log-cleaner] container on host [10.5.38.157]
INFO[1058] Removing container [rke-log-cleaner] on host [10.5.38.157], try #1
INFO[1058] Removing container [rke-log-cleaner] on host [10.5.38.52], try #1
INFO[1058] [remove/rke-log-cleaner] Successfully removed container on host [10.5.38.52]
INFO[1058] [remove/rke-log-cleaner] Successfully removed container on host [10.5.38.239]
INFO[1059] [cleanup] Successfully started [rke-log-cleaner] container on host [10.5.38.140]
INFO[1059] Removing container [rke-log-cleaner] on host [10.5.38.140], try #1
INFO[1059] [remove/rke-log-cleaner] Successfully removed container on host [10.5.38.157]
INFO[1059] [cleanup] Successfully started [rke-log-cleaner] container on host [10.5.38.228]
INFO[1059] Removing container [rke-log-cleaner] on host [10.5.38.228], try #1
INFO[1059] [remove/rke-log-cleaner] Successfully removed container on host [10.5.38.140]
INFO[1059] [remove/rke-log-cleaner] Successfully removed container on host [10.5.38.228]
INFO[1059] [sync] Syncing nodes Labels and Taints
INFO[1059] [sync] Successfully synced nodes Labels and Taints
INFO[1059] [network] Setting up network plugin: calico
INFO[1059] [addons] Saving ConfigMap for addon rke-network-plugin to Kubernetes
INFO[1060] [addons] Successfully saved ConfigMap for addon rke-network-plugin to Kubernetes
INFO[1060] [addons] Executing deploy job rke-network-plugin
INFO[1100] [addons] Setting up coredns
INFO[1100] [addons] Saving ConfigMap for addon rke-coredns-addon to Kubernetes
INFO[1100] [addons] Successfully saved ConfigMap for addon rke-coredns-addon to Kubernetes
INFO[1100] [addons] Executing deploy job rke-coredns-addon
INFO[1110] [addons] CoreDNS deployed successfully
INFO[1110] [dns] DNS provider coredns deployed successfully
INFO[1110] [addons] Setting up Metrics Server
INFO[1110] [addons] Saving ConfigMap for addon rke-metrics-addon to Kubernetes
INFO[1110] [addons] Successfully saved ConfigMap for addon rke-metrics-addon to Kubernetes
INFO[1110] [addons] Executing deploy job rke-metrics-addon
INFO[1120] [addons] Metrics Server deployed successfully
INFO[1120] [ingress] Setting up nginx ingress controller
INFO[1120] [addons] Saving ConfigMap for addon rke-ingress-controller to Kubernetes
INFO[1120] [addons] Successfully saved ConfigMap for addon rke-ingress-controller to Kubernetes
INFO[1120] [addons] Executing deploy job rke-ingress-controller
INFO[1130] [ingress] ingress controller nginx deployed successfully
INFO[1130] [addons] Setting up user addons
INFO[1130] [addons] no user addons defined
INFO[1130] Finished building Kubernetes cluster successfully 请确认升级最后一样是“Finished building Kubernetes cluster successfully ”字样，表明升级完成。
使用kubernetes配套客户端kubectl
centos@xr-prelocus:[/home/centos]ls
kubectl
//添加执行权限
centos@xr-prelocus:[/home/centos]chmod +x kubectl
centos@xr-prelocus:[/home/centos]ls
kubectl
centos@xr-prelocus:[/home/centos]sudo -i
//备份旧的，使用新的
root@xr-prelocus:[/root]which kubectl
/bin/kubectl
root@xr-prelocus:[/root]mv /bin/kubectl /bin/kubectl.bak
root@xr-prelocus:[/root]mv /home/centos/kubectl /bin/
//查看kubectl版本
[rancher@xr-prelocus ~]$ kubectl version
Client Version: version.Info{Major:"1", Minor:"20", GitVersion:"v1.20.6", GitCommit:"8a62859e515889f07e3e3be6a1080413f17cf2c3", GitTreeState:"clean", BuildDate:"2021-04-15T03:28:42Z", GoVersion:"go1.15.10", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"20", GitVersion:"v1.20.6", GitCommit:"8a62859e515889f07e3e3be6a1080413f17cf2c3", GitTreeState:"clean", BuildDate:"2021-04-15T03:19:55Z", GoVersion:"go1.15.10", Compiler:"gc", Platform:"linux/amd64"}
[rancher@xr-prelocus ~]$ kubectl get nodes
NAME STATUS ROLES AGE VERSION
10.5.38.140 Ready controlplane,etcd,worker 436d v1.20.6
10.5.38.157 Ready worker 427d v1.20.6
10.5.38.223 Ready worker 341d v1.20.6
10.5.38.228 Ready controlplane,etcd,worker 478d v1.20.6
10.5.38.239 Ready controlplane,etcd,worker 287d v1.20.6
10.5.38.52 Ready worker 341d v1.20.6
验证版本为1.20.6到此，RKE升级kubernetes成功完成，如有疑问请联系。
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