kubespray管理k8s的worker集群扩缩容

博客园 - 尹正杰

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尹正杰 · 2026-06-08 · via 博客园 - 尹正杰

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　作者：尹正杰

一.缩容K8S集群
二.扩容K8S集群
- 1.添加节点
- 2.

一.缩容K8S集群

1.查看现有集群环境

[root@master231 ~]# kubectl get nodes -o wide
NAME        STATUS   ROLES           AGE   VERSION    INTERNAL-IP   EXTERNAL-IP   OS-IMAGE             KERNEL-VERSION      CONTAINER-RUNTIME
master231   Ready    control-plane   15h   v1.33.10   10.0.0.231    <none>        Ubuntu 24.04.4 LTS   6.8.0-117-generic   containerd://2.1.6
master232   Ready    control-plane   15h   v1.33.10   10.0.0.232    <none>        Ubuntu 24.04.4 LTS   6.8.0-117-generic   containerd://2.1.6
master233   Ready    control-plane   15h   v1.33.10   10.0.0.233    <none>        Ubuntu 24.04.4 LTS   6.8.0-117-generic   containerd://2.1.6
worker66    Ready    <none>          15h   v1.33.10   10.0.0.66     <none>        Ubuntu 24.04.4 LTS   6.8.0-117-generic   containerd://2.1.6
worker77    Ready    <none>          15h   v1.33.10   10.0.0.77     <none>        Ubuntu 24.04.4 LTS   6.8.0-117-generic   containerd://2.1.6
[root@master231 ~]#

2.驱逐要下线的worker节点

  1.驱逐要下线的worker节点
[root@master231 ~]# kubectl drain worker66 --ignore-daemonsets --delete-emptydir-data 
node/worker66 cordoned
Warning: ignoring DaemonSet-managed Pods: kube-system/calico-node-wdrkf, kube-system/kube-proxy-2b7xl, kube-system/nodelocaldns-7w8ns
evicting pod kube-system/coredns-594cbfb5fd-9gdmp
pod/coredns-594cbfb5fd-9gdmp evicted
node/worker66 drained
[root@master231 ~]# 
[root@master231 ~]# 
[root@master231 ~]# kubectl drain worker77 --ignore-daemonsets --delete-emptydir-data 
node/worker77 cordoned
Warning: ignoring DaemonSet-managed Pods: kube-system/calico-node-67lgs, kube-system/kube-proxy-wl2ht, kube-system/nodelocaldns-jxq2d
evicting pod kube-system/dns-autoscaler-8558dbc749-28z2g
evicting pod kube-system/calico-kube-controllers-6b48c55b44-b5wr7
evicting pod kube-system/coredns-594cbfb5fd-klpr9
pod/dns-autoscaler-8558dbc749-28z2g evicted
pod/calico-kube-controllers-6b48c55b44-b5wr7 evicted
pod/coredns-594cbfb5fd-klpr9 evicted
node/worker77 drained
[root@master231 ~]# 


  2.再次查看节点列表
[root@master231 ~]# kubectl get nodes -o wide
NAME        STATUS                     ROLES           AGE   VERSION    INTERNAL-IP   EXTERNAL-IP   OS-IMAGE             KERNEL-VERSION      CONTAINER-RUNTIME
master231   Ready                      control-plane   16h   v1.33.10   10.0.0.231    <none>        Ubuntu 24.04.4 LTS   6.8.0-117-generic   containerd://2.1.6
master232   Ready                      control-plane   16h   v1.33.10   10.0.0.232    <none>        Ubuntu 24.04.4 LTS   6.8.0-117-generic   containerd://2.1.6
master233   Ready                      control-plane   16h   v1.33.10   10.0.0.233    <none>        Ubuntu 24.04.4 LTS   6.8.0-117-generic   containerd://2.1.6
worker66    Ready,SchedulingDisabled   <none>          16h   v1.33.10   10.0.0.66     <none>        Ubuntu 24.04.4 LTS   6.8.0-117-generic   containerd://2.1.6
worker77    Ready,SchedulingDisabled   <none>          16h   v1.33.10   10.0.0.77     <none>        Ubuntu 24.04.4 LTS   6.8.0-117-generic   containerd://2.1.6
[root@master231 ~]# 
[root@master231 ~]#

3.删除worker节点

参考链接:
  https://kubespray.io/#/docs/getting_started/getting-started?id=remove-nodes



  1.删除指定的多个节点
(venv) [root@ansible99 kubespray]# ansible-playbook -i inventory/yinzhengjie-k8s/inventory.ini remove-node.yml -b -v --extra-vars "node=worker66,worker77"


  2.查看删除后的效果【删除过程比较耗时间，删除过程中并没有出现停机的情况】
[root@master232 ~]# kubectl get nodes -o wide
NAME        STATUS   ROLES           AGE   VERSION    INTERNAL-IP   EXTERNAL-IP   OS-IMAGE             KERNEL-VERSION      CONTAINER-RUNTIME
master231   Ready    control-plane   18h   v1.33.10   10.0.0.231    <none>        Ubuntu 24.04.4 LTS   6.8.0-117-generic   containerd://2.1.6
master232   Ready    control-plane   18h   v1.33.10   10.0.0.232    <none>        Ubuntu 24.04.4 LTS   6.8.0-117-generic   containerd://2.1.6
master233   Ready    control-plane   18h   v1.33.10   10.0.0.233    <none>        Ubuntu 24.04.4 LTS   6.8.0-117-generic   containerd://2.1.6
[root@master232 ~]#

二.扩容K8S集群

1.添加节点

参考链接:
  https://kubespray.io/#/docs/getting_started/getting-started?id=adding-nodes

(venv) [root@ansible99 kubespray]# ansible-playbook -i inventory/yinzhengjie-k8s/inventory.ini scale.yml -b -v --extra-vars "node=worker66,worker77"

2.

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博客园 - 尹正杰

一.缩容K8S集群

1.查看现有集群环境

2.驱逐要下线的worker节点

3.删除worker节点

二.扩容K8S集群

1.添加节点

2.