k8s--k8s的資源清單

資源清單簡介

資源清單的格式

apiVersion: group/version //指明api資源屬於哪個羣組和版本，同一個組
可以有多個版本
kubectl api-versions //查詢命令
• kind: //標記創建的資源類型，k8s主要支持以下資源類別 Pod,ReplicaSet,Deployment,StatefulSet,DaemonSet,Job,Cronjob
• metadata: //元數據 name: //對像名稱
namespace: //對象屬於哪個命名空間 labels: //指定資源標籤，標籤是一種鍵值數據
• spec: //定義目標資源的期望狀態

#kubectl explain pod //查詢幫助文檔

創建自主式POD資源清單

$ vim demo.yaml

apiVersion: v1 
kind: Pod 
metadata:
  name: demo 
  labels:
    app: demo 
spec:
  containers:
  - name: ubuntu
    image: ubuntu
    command: ["/bin/sh", "-c", "sleep 3600"] 
  - name: nginx
    image: nginx

創建自主式pod
kubectl create -f demo.yaml

刪除自主式pod
kubectl deleate -f demo.yaml

標籤

$ kubectl get pod --show-labels //查看標籤 

NAME READY STATUS RESTARTS AGE LABELS
demo 2/2 Running 0 8s app=demo

• $ kubectl get pod -l app

NAME READY STATUS RESTARTS AGE demo 2/2 Running 0 34s
//過濾包含app的標籤 NAME READY STATUS RESTARTS AGE APP

• $ kubectl get pod -L app

demo 2/2 Running 0 39s demo

$ kubectl label pod demo version=v1 //打標籤

pod/demo labeled

• $ kubectl get pod --show-labels

NAME READY STATUS RESTARTS AGE LABELS demo 2/2 Running 0 4m1s app=demo,version=v1

• $ kubectl label pod demo app=nginx --overwrite //更改標籤

pod/demo labeled

• $ kubectl get pod --show-labels

NAME READY STATUS RESTARTS AGE LABELS demo 2/2 Running 0 5m40s app=nginx,version=v1

節點標籤選擇器

$ kubectl label nodes server2 disktype=ssd

node/server2 labeled

$ kubectl get nodes -l disktype

NAME STATUS ROLES AGE VERSION
server2 Ready 6d v1.17.2

在yaml文件中增加標籤選擇器

$ kubectl delete -f demo.yml 
 pod "demo" deleted
 $ kubectl create -f demo.yaml 
 pod/demo created
 $ kubectl get pod -o wide
NAME READY STATUS RESTARTS AGE IP NODE 
demo 2/2 Running 0 2m16s 10.244.1.44 server2