在 wsl 中运用 kubeconfig 实现自由管理 kubernetes 集群

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k8s 集群配置

IP	Host	配置
11.0.1.150	master1 (keepalived+haproxy)	2C 4G 30G
11.0.1.148	master2 (keepalived+haproxy)	2C 4G 30G
11.0.1.149	node1	2C 4G 30G

理解 kubeconfig

本文是使用 kubectl 来管理 k8s 集群, 所以你需要知道 kubeconfig 的配置结构, 也可以直接 copy-paste

kubectl 管理优势: 可通过切换 context 上下文, 更换操作集群 => 可管理集群联邦

推荐: 理解/使用 kubeconfig 管理集群 – CSDN

思路整理:

首先理清思路, 要使用 wsl 管理远程 k8s 集群

1. 确保 wsl 能够连接到 k8s 集群
2. 要管理 k8s 集群, 就需要在 wsl 上安装 kubectl, 不再需要 kubeadm 与 kubelet
3. 要想使用 kubectl 管理集群, 就需要集群的 kubeconfig 与 集群证书

在 wsl 上安装 kubectl

# 安装依赖
apt install apt-transport-https ca-certificates -y
apt install vim lsof net-tools zip unzip tree wget curl bash-completion pciutils gcc make lrzsz tcpdump bind9-utils -y 

# 编辑镜像源文件，文件末尾加入阿里云k8s镜像源配置
echo 'deb https://mirrors.aliyun.com/kubernetes/apt kubernetes-xenial main' >> /etc/apt/sources.list
#更新证书
curl https://mirrors.aliyun.com/kubernetes/apt/doc/apt-key.gpg | sudo apt-key add
#更新源
apt update

# 查看 kubeadm 版本
apt-cache madison kubeactl | grep 1.28
apt-get install -y kubectl=1.28.1-00

配置自动补全

apt install bash-completion -y
cat << EOF >> ~/.profile
alias k='kubectl'
source <(kubectl completion bash)
complete -F __start_kubectl k
EOF

source ~/.profile

拷贝 kubeconfig

登到 k8s 集群的 master 节点, 把 kubeconfig 拷贝到 wsl

ssh 免密登录

echo "172.28.18.117 wsl" >> /etc/hosts

# 测试链接
ping wsl

# 拷贝公钥
ssh-copy-id -i ~/.ssh/id_rsa.pub root@wsl

如果有安全需要的话, 就不要把建立 wsl 与 master 的免密登录

拷贝 kubeconfig

ssh root@wsl mkdir /root/.kube

scp /root/.kube/config root@wsl:/root/.kube/config

测试 kubectl

root@MKT:~# k get po -A
NAMESPACE          NAME                                      READY   STATUS    RESTARTS      AGE
calico-apiserver   calico-apiserver-69fc754d76-9w7p6         1/1     Running   1 (17m ago)   46h
calico-apiserver   calico-apiserver-69fc754d76-kdxt4         1/1     Running   1 (21m ago)   46h
calico-system      calico-kube-controllers-b9dcc57c4-gzlhk   1/1     Running   1 (21m ago)   46h
calico-system      calico-node-5jckf                         1/1     Running   1 (17m ago)   46h
calico-system      calico-node-gq882                         1/1     Running   1 (21m ago)   46h
calico-system      calico-node-zksvz                         1/1     Running   1 (21m ago)   45h
calico-system      calico-typha-5cdb9d5d59-tnjzh             1/1     Running   1 (17m ago)   46h
calico-system      calico-typha-5cdb9d5d59-z7tnk             1/1     Running   1 (21m ago)   45h
calico-system      csi-node-driver-j4648                     2/2     Running   2 (21m ago)   46h
calico-system      csi-node-driver-jf548                     2/2     Running   2 (21m ago)   45h
calico-system      csi-node-driver-p9b8p                     2/2     Running   2 (17m ago)   46h
kube-system        coredns-66f779496c-n4lwr                  1/1     Running   1             46h
kube-system        coredns-66f779496c-tmjx9                  1/1     Running   1 (21m ago)   46h
kube-system        etcd-master1                              1/1     Running   3 (21m ago)   46h
kube-system        etcd-master2                              1/1     Running   1 (21m ago)   45h
kube-system        kube-apiserver-master1                    1/1     Running   3 (21m ago)   46h
kube-system        kube-apiserver-master2                    1/1     Running   1 (21m ago)   45h
kube-system        kube-controller-manager-master1           1/1     Running   5 (21m ago)   46h
kube-system        kube-controller-manager-master2           1/1     Running   2 (20m ago)   45h
kube-system        kube-proxy-9tjjg                          1/1     Running   1 (17m ago)   46h
kube-system        kube-proxy-chcc5                          1/1     Running   1 (21m ago)   45h
kube-system        kube-proxy-mrp2v                          1/1     Running   1 (21m ago)   46h
kube-system        kube-scheduler-master1                    1/1     Running   5 (21m ago)   46h
kube-system        kube-scheduler-master2                    1/1     Running   1 (21m ago)   45h
tigera-operator    tigera-operator-55585899bf-tcdhv          1/1     Running   4 (17m ago)   46h

参考:

1. https://kubernetes.io/zh-cn/docs/concepts/configuration/organize-cluster-access-kubeconfig/