官网  https://kubernetes.io

kubectl create -f xxxx.yaml
kubectl edit -f deployment.yaml
kubectl apply -f deployment.yaml

kubectl get deployments
kubectl get pods -o wide
kubectl describe deployment
kubectl scale deployment/httpd-deployment --replicas=1
kubectl delete deployment httpd-deployment

kubectl get svc
kubectl get node

kubectl exec -it [PodName] -- /bin/bash

============================================================

spec:
  volumes:
  - name: html
    emptyDir: {}         

spec:
  volumes:
  - name: test-hostpath
    hostPath:
      path: /Users/eight/k8s/data
      type: DirectoryOrCreate

spec:
  volumes:
  - name: html
    nfs:
      path: /data/volume
      #nfs服务的地址
      server: 192.168.37.108    

spec:
  volumes:
  - name: html
    persistentVolumeClaim:
      claimName: mypvc

K8s存储管理——volume、pv、pvc

https://blog.csdn.net/weixin_48404074/article/details/124956596?spm=1001.2101.3001.6650.1&utm_medium=distribute.pc_relevant.none-task-blog-2~default~CTRLIST~Rate-1-124956596-blog-122021502.t5_refersearch_landing&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2~default~CTRLIST~Rate-1-124956596-blog-122021502.t5_refersearch_landing&utm_relevant_index=2

============================================================

中文教程：https://www.orchome.com/kubernetes/index

 单节点 installation manual  https://www.orchome.com/9907

 多节点 installation manual  https://www.cnblogs.com/xuliangg/p/16014204.html

k8s 网络 https://www.zhihu.com/column/c_1414266494658650112

重新 installation 前运行 ：kubeadm reset

kubeadm join 前，确保节点时间一致

CNI网络插件:  flannel 或者 calico  --  Pod网络插件仅在master上安zhuang

kubeadm部署k8s集群node一直是notready状态的解决方案:
解决方法，将master上/etc/cni/net.d 目录下的文件拷贝到有问题的节点上：
scp server4:/etc/cni/net.d/* /etc/cni/net.d/

node not found : 原因 container image pull 不到。

维护pod cidr： http://www.hyhblog.cn/2021/02/21/k8s-flannel-pod-cidr-not-assigned/

V1.25

=== Container

Installation Manual:  https://blog.csdn.net/oscarun/article/details/125370554?spm=1001.2101.3001.6650.4&utm_medium=distribute.pc_relevant.none-task-blog-2~default~CTRLIST~Rate-4-125370554-blog-120093243.pc_relevant_aa_2&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2~default~CTRLIST~Rate-4-125370554-blog-120093243.pc_relevant_aa_2&utm_relevant_index=9

生成containerd的配置文件
mkdir /etc/containerd -p
#生成配置文件
containerd config default > /etc/containerd/config.toml
#编辑配置文件
vim /etc/containerd/config.toml
SystemdCgroup = false 改为 SystemdCgroup = true

#这里pause的版本可以用 kubeadm config images list获取
#sandbox_image = "k8s.gcr.io/pause:3.7"
改为：
sandbox_image = "registry.aliyuncs.com/google_containers/pause:3.7"

#systemctl enable containerd
#systemctl start containerd