kubeadm升级k8s

可以看到我们的版本可以升级到v1.24.4。

consice code

941人浏览 · 2022-09-04 23:11:11

consice code · 2022-09-04 23:11:11 发布

kubeadm升级

验证是否可以升级

# kubeadm upgrade plan
[upgrade/config] Making sure the configuration is correct:
[upgrade/config] Reading configuration from the cluster...
[upgrade/config] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -o yaml'
[preflight] Running pre-flight checks.
[upgrade] Running cluster health checks
[upgrade] Fetching available versions to upgrade to
[upgrade/versions] Cluster version: v1.24.1
[upgrade/versions] kubeadm version: v1.24.1
I0904 22:38:57.778942   76888 version.go:255] remote version is much newer: v1.25.0; falling back to: stable-1.24
[upgrade/versions] Target version: v1.24.4
[upgrade/versions] Latest version in the v1.24 series: v1.24.4

Components that must be upgraded manually after you have upgraded the control plane with 'kubeadm upgrade apply':
COMPONENT   CURRENT       TARGET
kubelet     3 x v1.24.1   v1.24.4

Upgrade to the latest version in the v1.24 series:

COMPONENT                 CURRENT   TARGET
kube-apiserver            v1.24.1   v1.24.4
kube-controller-manager   v1.24.1   v1.24.4
kube-scheduler            v1.24.1   v1.24.4
kube-proxy                v1.24.1   v1.24.4
CoreDNS                   v1.8.6    v1.8.6
etcd                      3.5.3-0   3.5.3-0

You can now apply the upgrade by executing the following command:

	kubeadm upgrade apply v1.24.4

Note: Before you can perform this upgrade, you have to update kubeadm to v1.24.4.

_____________________________________________________________________


The table below shows the current state of component configs as understood by this version of kubeadm.
Configs that have a "yes" mark in the "MANUAL UPGRADE REQUIRED" column require manual config upgrade or
resetting to kubeadm defaults before a successful upgrade can be performed. The version to manually
upgrade to is denoted in the "PREFERRED VERSION" column.

API GROUP                 CURRENT VERSION   PREFERRED VERSION   MANUAL UPGRADE REQUIRED
kubeproxy.config.k8s.io   v1alpha1          v1alpha1            no
kubelet.config.k8s.io     v1beta1           v1beta1             no
_____________________________________________________________________

可以看到我们的版本可以升级到v1.24.4

显示版本差异

# kubeadm upgrade diff 1.24.4
[upgrade/diff] Reading configuration from the cluster...
[upgrade/diff] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -o yaml'
--- /etc/kubernetes/manifests/kube-apiserver.yaml
+++ new manifest
@@ -40,7 +40,7 @@
     - --service-cluster-ip-range=10.96.0.0/12
     - --tls-cert-file=/etc/kubernetes/pki/apiserver.crt
     - --tls-private-key-file=/etc/kubernetes/pki/apiserver.key
-    image: registry.aliyuncs.com/google_containers/kube-apiserver:v1.24.1
+    image: registry.aliyuncs.com/google_containers/kube-apiserver:1.24.4
     imagePullPolicy: IfNotPresent
     livenessProbe:
       failureThreshold: 8
--- /etc/kubernetes/manifests/kube-controller-manager.yaml
+++ new manifest
@@ -28,7 +28,7 @@
     - --service-account-private-key-file=/etc/kubernetes/pki/sa.key
     - --service-cluster-ip-range=10.96.0.0/12
     - --use-service-account-credentials=true
-    image: registry.aliyuncs.com/google_containers/kube-controller-manager:v1.24.1
+    image: registry.aliyuncs.com/google_containers/kube-controller-manager:1.24.4
     imagePullPolicy: IfNotPresent
     livenessProbe:
       failureThreshold: 8
--- /etc/kubernetes/manifests/kube-scheduler.yaml
+++ new manifest
@@ -16,7 +16,7 @@
     - --bind-address=127.0.0.1
     - --kubeconfig=/etc/kubernetes/scheduler.conf
     - --leader-elect=true
-    image: registry.aliyuncs.com/google_containers/kube-scheduler:v1.24.1
+    image: registry.aliyuncs.com/google_containers/kube-scheduler:1.24.4
     imagePullPolicy: IfNotPresent
     livenessProbe:
       failureThreshold: 8

查看kubeadm版本

# apt-cache madison kubeadm
  kubeadm |  1.25.0-00 | https://mirrors.aliyun.com/kubernetes/apt kubernetes-xenial/main amd64 Packages
  kubeadm |  1.24.4-00 | https://mirrors.aliyun.com/kubernetes/apt kubernetes-xenial/main amd64 Packages

可以看到我们最新的版本时1.25.0以及1.24.4

升级

升级kubeadm

sudo apt-get install kubeadm=1.24.4-00

将 Kubernetes 集群升级到指定版本

sudo kubeadm upgrade apply 1.24.4

升级master节点

开启调度保护

# kubectl cordon master1
node/master1 cordoned
# kubectl get node
NAME      STATUS                     ROLES           AGE    VERSION
master1   Ready,SchedulingDisabled   control-plane   145m   v1.24.1
node1     Ready                      <none>          121m   v1.24.1
node2     Ready                      <none>          108m   v1.24.1
# 排空节点
# kubectl drain master1 --ignore-daemonsets
node/master1 already cordoned
WARNING: ignoring DaemonSet-managed Pods: kube-flannel/kube-flannel-ds-8lfc4, kube-system/kube-proxy-km8gx
evicting pod kube-system/coredns-74586cf9b6-fq7gg
evicting pod kube-system/coredns-74586cf9b6-2pk2p
pod/coredns-74586cf9b6-fq7gg evicted
pod/coredns-74586cf9b6-2pk2p evicted
node/master1 drained

更新节点配置

sudo kubeadm upgrade node

升级kublet组件

sudo apt-get install -y kubelet=1.24.4-00 kubectl=1.24.4-00

取消调度保护

kubectl uncordon master1
# kubectl get node
NAME      STATUS   ROLES           AGE    VERSION
master1   Ready    control-plane   149m   v1.24.4
node1     Ready    <none>          125m   v1.24.1
node2     Ready    <none>          113m   v1.24.1

升级node节点

开启调度保护（master节点执行）

# kubectl cordon node1
node/node1 cordoned
# kubectl get node
NAME      STATUS                     ROLES           AGE    VERSION
master1   Ready                      control-plane   151m   v1.24.4
node1     Ready,SchedulingDisabled   <none>          127m   v1.24.1
node2     Ready                      <none>          115m   v1.24.1
# 排空节点
# kubectl drain node1 --ignore-daemonsets
node/node1 already cordoned
WARNING: ignoring DaemonSet-managed Pods: kube-flannel/kube-flannel-ds-q8dpb, kube-system/kube-proxy-g7mbw
evicting pod kube-system/coredns-74586cf9b6-782sb
evicting pod default/myhello-rc-bxlbg
evicting pod default/myhello-rc-792dl
evicting pod default/myhello-rc-vxz47
pod/myhello-rc-vxz47 evicted
pod/myhello-rc-792dl evicted
pod/myhello-rc-bxlbg evicted
pod/coredns-74586cf9b6-782sb evicted
node/node1 drained
# 可以看到所有容器均运行到node2节点了
# kubectl get pod -o wide
NAME               READY   STATUS    RESTARTS   AGE   IP           NODE    NOMINATED NODE   READINESS GATES
myhello-rc-2bmwh   1/1     Running   0          22s   10.244.4.7   node2   <none>           <none>
myhello-rc-bmln7   1/1     Running   0          22s   10.244.4.9   node2   <none>           <none>
myhello-rc-kjftb   1/1     Running   0          70m   10.244.4.3   node2   <none>           <none>
myhello-rc-pk6vc   1/1     Running   0          22s   10.244.4.8   node2   <none>           <none>
myhello-rc-wdvt6   1/1     Running   0          70m   10.244.4.2   node2   <none>           <none>

升级kublet组件（node节点执行）

sudo apt-get install -y kubelet=1.24.4-00 kubectl=1.24.4-00

更新节点配置（node节点执行）

sudo kubeadm upgrade node

取消调度保护（master节点执行）

kubectl uncordon node1
# kubectl get node
NAME      STATUS   ROLES           AGE    VERSION
master1   Ready    control-plane   149m   v1.24.4
node1     Ready    <none>          125m   v1.24.1
node2     Ready    <none>          113m   v1.24.1

升级完成

# kubectl get node
NAME      STATUS   ROLES           AGE    VERSION
master1   Ready    control-plane   157m   v1.24.4
node1     Ready    <none>          133m   v1.24.4
node2     Ready    <none>          121m   v1.24.4

# kubectl get pod -o wide
NAME               READY   STATUS    RESTARTS   AGE    IP            NODE    NOMINATED NODE   READINESS GATES
myhello-rc-4thbx   1/1     Running   0          100s   10.244.3.9    node1   <none>           <none>
myhello-rc-b4f49   1/1     Running   0          100s   10.244.3.11   node1   <none>           <none>
myhello-rc-frws4   1/1     Running   0          100s   10.244.3.8    node1   <none>           <none>
myhello-rc-wgddb   1/1     Running   0          100s   10.244.3.7    node1   <none>           <none>
myhello-rc-xtpbr   1/1     Running   0          100s   10.244.3.10   node1   <none>           <none>

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