1. kubectl的安装
curl -LO https://storage.googleapis.com/kubernetes-release/release/$(curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt)/bin/linux/amd64/kubectl && chmod +x kubectl && sudo mv kubectl /usr/local/bin/
安装指定版本的kubectl,例如:v1.9.0
curl -LO https://storage.googleapis.com/kubernetes-release/release/v1.9.0/bin/linux/amd64/kubectl && chmod +x kubectl && sudo mv kubectl /usr/local/bin/
2. 配置k8s集群环境
2.1. 命令行方式
2.1.1 非安全方式
kubectl config set-cluster k8s --server=http://<url>
kubectl config set-context <NAMESPACE> --cluster=k8s --namespace=<NAMESPACE>
kubectl config use-context <NAMESPACE>
2.1.2 安全方式
kubectl config set-cluster k8s --server=https://<url> --insecure-skip-tls-verify=true
kubectl config set-credentials k8s-user --username=<username> --password=<password>
kubectl config set-context <NAMESPACE> --cluster=k8s --user=k8s-user --namespace=<NAMESPACE>
kubectl config use-context <NAMESPACE>
2.1.3 查询当前配置环境
[root@test ]# kubectl cluster-info
Kubernetes master is running at http://192.168.10.3:8081
2.2. 添加配置文件的方式
当没有指定--kubeconfig
参数和$KUBECONFIG
的环境变量的时候,会默认读取${HOME}/.kube/config
。
因此创建${HOME}/.kube/config
文件,并在`${HOME}/.kube/ssl
目录下创建ca.pem、cert.pem、key.pem文件。
内容如下:
apiVersion: v1
kind: Config
clusters:
- name: local
cluster:
certificate-authority: ./ssl/ca.pem
server: https://192.168.10.3:6443
users:
- name: kubelet
user:
client-certificate: ./ssl/cert.pem
client-key: ./ssl/key.pem
contexts:
- context:
cluster: local
user: kubelet
name: kubelet-cluster.local
current-context: kubelet-cluster.local
3. kubectl config
kubectl config命令说明
$ kubectl config --help
Modify kubeconfig files using subcommands like "kubectl config set current-context my-context"
The loading order follows these rules:
1. If the --kubeconfig flag is set, then only that file is loaded. The flag may only be set once and no merging takes
place.
2. If $KUBECONFIG environment variable is set, then it is used a list of paths (normal path delimitting rules for your
system). These paths are merged. When a value is modified, it is modified in the file that defines the stanza. When a
value is created, it is created in the first file that exists. If no files in the chain exist, then it creates the last
file in the list.
3. Otherwise, ${HOME}/.kube/config is used and no merging takes place.
Available Commands:
current-context Displays the current-context
delete-cluster Delete the specified cluster from the kubeconfig
delete-context Delete the specified context from the kubeconfig
get-clusters Display clusters defined in the kubeconfig
get-contexts Describe one or many contexts
rename-context Renames a context from the kubeconfig file.
set Sets an individual value in a kubeconfig file
set-cluster Sets a cluster entry in kubeconfig
set-context Sets a context entry in kubeconfig
set-credentials Sets a user entry in kubeconfig
unset Unsets an individual value in a kubeconfig file
use-context Sets the current-context in a kubeconfig file
view Display merged kubeconfig settings or a specified kubeconfig file
Usage:
kubectl config SUBCOMMAND [options]
Use "kubectl <command> --help" for more information about a given command.
Use "kubectl options" for a list of global command-line options (applies to all commands).
4. shell自动补齐
source <(kubectl completion bash)
echo "source <(kubectl completion bash)" >> ~/.bashrc
参考文章: