kubernetes集群命令行工具kubectl

kubectl get pod pod1
kubectl get pods pod1
kubectl get po pod1

kubectl get pods

kubectl get node
kubectl get nodes
kubectl get nodes master

kubectl get --help

kubectl create deployment nginx --image=nginx

kubectl expose deployment nginx --port=80 --type=NodePort

kubectl get pod, svc

kubectl get cs

# 查看所有pods 指定命名空间
kubectl get pods --all-namespaces

# 查所有service
kubectl get service

kubectl get deployment

kubectl get deployment
kubectl delete deployment flask-demo
或者
kubectl delete-f app.yaml

vim app.yaml

# 1 部署信息
apiVersion: apps/v1
kind: Deployment # 采用deployment部署
metadata:
  name: flask-demo
  namespace: default # 默认命名空间
  labels:
    app: flask-demo
spec:
  replicas: 2 # 副本设置1个
  selector:
    matchLabels:
      app: flask-demo
  template:
    metadata:
      labels:
        app: flask-demo
    spec:
      containers: #容器相关配置
        - name: flask-demo-app
          image: vitcloud/flask_demo:latest # 镜像地址
          ports: # 容器暴露端口
            - containerPort: 80
          resources:  # 容器所要使用的资源
            requests:
              cpu: "1000m"
              memory: "1Gi"
            limits:
              cpu: "2000m"
              memory: "2Gi"

# service 信息 --- 同部署关联
apiVersion: v1
kind: Service
metadata:
  name: flask-demo-service
spec:
  selector: # ====对应
    app: flask-demo # 指向pod
  type: NodePort  # 通过端口开放服务
  ports:
    - name: web
      port: 80
      protocol: TCP
#      targetPort: 80 # 容器端口
#      nodePort: 30001  # 对外暴露端口

kubectl apply -f app.yaml

# 查看
kubectl get pods --all-namespaces -o wide
# 查看进度
watch kubectl get pods --all-namespaces -o wide
# 查看资源详情
kubectl describe pods flask-demo-77f769cb94-7pw4q

<p><h3>文章目录</h3><ul><ul><li><a href="#1_kubectl__2">1 kubectl 概述</a></li><li><a href="#2_kubernetes_6">2 kubernetes命令</a></li><ul><li><a href="#21_kubectl__8">2.1 kubectl 命令的语法</a></li><li><a href="#22__44">2.2 常用命令</a></li></ul><li><a href="#3__72">3 使用命令</a></li><ul><li><a href="#31__74">3.1 查</a></li><li><a href="#32_Deployment__91">3.2 Deployment 操作</a></li></ul><li><a href="#4__108">4 项目部署</a></li></ul></ul></p> <h2><a id="1_kubectl__2"></a>1 kubectl 概述</h2> <p>kubectl是Kubernetes集群的命令行工具，通过kubectl能够对集群本身进行管理，并能够在集群上进行容器话应用安装部署。</p> <h2><a id="2_kubernetes_6"></a>2 kubernetes命令</h2> <h3><a id="21_kubectl__8"></a>2.1 kubectl 命令的语法</h3> <p><code>kubectl [common] [TYPE] [NAME] [flags]</code><br /> （1）comand：指定要对资源执行的操作，例如 create、get、describe和delete<br /> （2）TYPE：指定资源的类型，资源类型是大小写敏感的，开发者能够以单数、复数和缩略的形式，例如：</p> <pre><div class="hljs"><code class="lang-shell">kubectl get pod pod1 kubectl get pods pod1 kubectl get po pod1 </code></div></pre> <p>（3）NAME：指定资源的名称，名称也大小写敏感的。如果省略名称，则会显示所有的资源。</p> <pre><div class="hljs"><code class="lang-shell">kubectl get pods </code></div></pre> <p>（4）flags：指定可选的参数。例如：可用-s或者-server参数指定Kubernetes API Server的地址和端口。</p> <pre><div class="hljs"><code class="lang-shell">kubectl get node kubectl get nodes kubectl get nodes master </code></div></pre> <p><img src="https://static.couragesteak.com/article/caa4b5382b1f788454abe90a2116dfb6.png" alt="" /></p> <p>帮助命令<br /> <code>kubectl --help</code><br /> 具体查看某个操作</p> <pre><div class="hljs"><code class="lang-shell">kubectl get --help </code></div></pre> <h3><a id="22__44"></a>2.2 常用命令</h3> <p><strong>nginx为例</strong></p> <p>创建nginx pod</p> <pre><div class="hljs"><code class="lang-shell">kubectl create deployment nginx --image=nginx </code></div></pre> <p>对外暴露端口</p> <pre><div class="hljs"><code class="lang-shell">kubectl expose deployment nginx --port=80 --type=NodePort </code></div></pre> <pre><div class="hljs"><code class="lang-shell">kubectl get pod, svc </code></div></pre> <p><img src="https://static.couragesteak.com/article/3340279481bd066c578033e1ecfa8fa5.png" alt="" /></p> <p>查看当前健康状态</p> <pre><div class="hljs"><code class="lang-shell">kubectl get cs </code></div></pre> <h2><a id="3__72"></a>3 使用命令</h2> <h3><a id="31__74"></a>3.1 查</h3> <p>查pods</p> <pre><div class="hljs"><code class="lang-shell"><span class="hljs-meta"># </span><span class="language-bash">查看所有pods 指定命名空间</span> kubectl get pods --all-namespaces </code></div></pre> <p>查service</p> <pre><div class="hljs"><code class="lang-shell"><span class="hljs-meta"># </span><span class="language-bash">查所有service</span> kubectl get service </code></div></pre> <h3><a id="32_Deployment__91"></a>3.2 Deployment 操作</h3> <p>查看</p> <pre><div class="hljs"><code class="lang-shell">kubectl get deployment </code></div></pre> <p>删除</p> <pre><div class="hljs"><code class="lang-shell">kubectl get deployment kubectl delete deployment flask-demo 或者 kubectl delete-f app.yaml </code></div></pre> <h2><a id="4__108"></a>4 项目部署</h2> <pre><div class="hljs"><code class="lang-shell">vim app.yaml </code></div></pre> <pre><div class="hljs"><code class="lang-shell"><span class="hljs-meta"># </span><span class="language-bash">1 部署信息</span> apiVersion: apps/v1 kind: Deployment # 采用deployment部署 metadata: name: flask-demo namespace: default # 默认命名空间 labels: app: flask-demo spec: replicas: 2 # 副本设置1个 selector: matchLabels: app: flask-demo template: metadata: labels: app: flask-demo spec: containers: #容器相关配置 - name: flask-demo-app image: vitcloud/flask_demo:latest # 镜像地址 ports: # 容器暴露端口 - containerPort: 80 resources: # 容器所要使用的资源 requests: cpu: &quot;1000m&quot; memory: &quot;1Gi&quot; limits: cpu: &quot;2000m&quot; memory: &quot;2Gi&quot; </code></div></pre> <pre><div class="hljs"><code class="lang-shell"><span class="hljs-meta"># </span><span class="language-bash">service 信息 --- 同部署关联</span> apiVersion: v1 kind: Service metadata: name: flask-demo-service spec: selector: # ====对应 app: flask-demo # 指向pod type: NodePort # 通过端口开放服务 ports: - name: web port: 80 protocol: TCP <span class="hljs-meta"># </span><span class="language-bash"> targetPort: 80 <span class="hljs-comment"># 容器端口</span></span> <span class="hljs-meta"># </span><span class="language-bash"> nodePort: 30001 <span class="hljs-comment"># 对外暴露端口</span></span> </code></div></pre> <p>指定文件</p> <pre><div class="hljs"><code class="lang-shell">kubectl apply -f app.yaml </code></div></pre> <pre><div class="hljs"><code class="lang-shell"><span class="hljs-meta"># </span><span class="language-bash">查看</span> kubectl get pods --all-namespaces -o wide <span class="hljs-meta"># </span><span class="language-bash">查看进度</span> watch kubectl get pods --all-namespaces -o wide <span class="hljs-meta"># </span><span class="language-bash">查看资源详情</span> kubectl describe pods flask-demo-77f769cb94-7pw4q </code></div></pre>