# k8s-study

**Repository Path**: thousmile/k8s-study

## Basic Information

- **Project Name**: k8s-study
- **Description**: k8s 学习的命令
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 1
- **Forks**: 0
- **Created**: 2023-04-28
- **Last Updated**: 2024-06-30

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

## 一、基础环境部署
### [参考](https://blog.csdn.net/weixin_40548182/article/details/129179182)

## 1、修改主机名和配置 hosts 部署 1个master 和 2个node 节点
```shell
### 在192.168.239.41执行
hostnamectl set-hostname k8s-node1 && hostname

### 在192.168.239.42执行
hostnamectl set-hostname k8s-node2 && hostname

### 在192.168.239.43执行
hostnamectl set-hostname k8s-node3 && hostname

### 在所有节点上执行

cat >> /etc/hosts<<EOF
192.168.239.41 k8s-node1
192.168.239.42 k8s-node2
192.168.239.43 k8s-node3
EOF


### 在k8s-node2和k8s-node3 节点上测试
ping k8s-node1

```

## 2、配置 ssh 互信

```shell
### 直接一直回车就行

ssh-keygen

ssh-copy-id -i ~/.ssh/id_rsa.pub root@k8s-node1

ssh-copy-id -i ~/.ssh/id_rsa.pub root@k8s-node2

ssh-copy-id -i ~/.ssh/id_rsa.pub root@k8s-node3

```

### 3、时间同步
```shell

dnf install -y tar wget unzip git curl chrony vim

systemctl enable chronyd --now

```


### 4、关闭防火墙
```shell

systemctl disable firewalld --now

```

### 5、安装 KubeKey 必须要条件
```shell

dnf install -y socat conntrack ebtables ipset

```


### 6、安装 KubeKey 必须要条件
```shell
## https://kubesphere.io/zh/docs/v3.3/installing-on-linux/introduction/multioverview/

export KKZONE=cn

curl -sfL https://get-kk.kubesphere.io | VERSION=v3.0.7 sh -

chmod +x kk

# 只安装 kubernetes 
./kk create config --with-kubernetes v1.23.10 -f config-sample.yaml

# 安装 kubernetes 和 KubeSphere
./kk create config --with-kubesphere v3.3.2 -f config-sample.yaml

```


### 7、验证

```shell
kubectl get nodes -owide

kubectl version -o=yaml

# 如果安装了 KubeSphere 。那么 http://主节点IP:30880 就是访问地址
http://192.168.2.31:30880

```


### 8、常用命令

```shell
kubectl get ing -o wide

kubectl get pod -o wide

kubectl get svc -o wide

kubectl get pod,svc -o wide

kubectl get pod,svc -o wide -n demo

kubectl describe deployment demo-dep

kubectl describe pod demo-pod

kubectl describe svc demo-svc

kubectl describe ingress demo-ingress

kubectl apply -f hello-dep.yaml

kubectl delete -f hello-dep.yaml

kubectl get all -n ingress-nginx

kubectl get cm

kubectl get cm redis.conf -o yaml

kubectl describe cm redis.conf

kubectl logs -n ingress-nginx ingress-nginx-admission-create-bj4d4

kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v1.7.0/deploy/static/provider/cloud/deploy.yaml

kubectl create secret docker-registry aliyun-registry-secret \
--docker-server=registry.cn-shenzhen.aliyuncs.com \
--docker-username=asassa12 \
--docker-password=88BfP4qys1boKCvQ


### 获取 admin-user 的 token 登录 kubernetes dashboard 使用
kubectl describe secret -n kube-system admin-user

kubectl describe secret admin-user -n kube-system | grep '^token'|awk '{print $2}'

```



### 9、nfs 挂载

```shell
#全部节点 都要安装
dnf -y install nfs-utils rpcbind

#全部节点 都要创建
mkdir -p /data/nfs/ && chown -R 755 /data/nfs/

# 主节点安装
echo "/data/nfs/  *(insecure,rw,sync,no_root_squash)" > /etc/exports

# 主节点启动，centos 7。使用
systemctl enable nfs --now

# 主节点启动，centos 8以上。使用
systemctl enable nfs-server --now

# 所有节点都要安装
systemctl enable rpcbind --now

showmount -e k8s-master

# 临时 在其他节点上挂在
mount -t nfs k8s-master:/data/nfs /data/nfs

# 开机启动挂载 在其他节点上挂在
vi /etc/fstab
k8s-master:/data/nfs /data/nfs 		nfs 		defaults 	0 0

echo "hello nfs " > /data/nfs/hello.txt

### helm 方式，添加 nfs 到 k8s
helm repo add kubesphere https://charts.kubesphere.io/main

helm install managed-nfs-storage kubesphere/nfs-client-provisioner -n kube-system --version 4.0.11 \
--set nfs.server=k8s-master \
--set nfs.path=/data/nfs \
--set storageClass.name=managed-nfs-storage \
--set storageClass.defaultClass=true

## 导出镜像
ctr -n=k8s.io i export images.tar.gz --platform=linux/amd64 docker.io/bitnami/elasticsearch:8.6.2-debian-11-r10

## 导入镜像
ctr -n=k8s.io i import images.tar.gz

```