kubernete实战篇-Deployment部署

我们以部署一个可访问http服务的为例,涉及的知识点:

  • ConfigMap
  • Service
  • Deployment
  • kubectl port-forward

编写yaml

# sai-config.yaml

# 定义 ConfigMap
apiVersion: v1
kind: ConfigMap
metadata: # 元数据,定义基本属性和信息
  name: sai-config # 名称
data:
  config.yaml: |-
    name: sai0556
    mode: debug
    addr: :8080
    hi: w~o~w

---
# 定义 Service
apiVersion: v1
kind: Service
metadata:
  name: sai
  labels: # 标签
    app: sai
spec: # 描述
  ports:
  - protocol: TCP
    port: 80 # Service的虚拟端口
    targetPort: 8080 # 容器暴露的端口
  selector: # 选择器,对应下面的 Deployment的 labels
    app: sai

---
# 定义 Deployment
apiVersion: apps/v1
kind: Deployment
metadata:
  name: sai
spec:
  replicas: 1 # 创建应用程序实例个数
  selector: # 标签选择器
    matchLabels: # 选择包含标签app:sai的资源
      app: sai
  template: # 模板
    metadata:
      labels:
        app: sai
    spec:
      containers:
      - name: sai
        image: 	13sai/k8s-configmap-sai:0.2
        imagePullPolicy: IfNotPresent
        command:
          - '/app/13sai'
        volumeMounts: # 数据卷挂载
          - name: config
            mountPath: /app/config.yaml
            readOnly: true
            subPath: config.yaml
      volumes: # 挂载的具体信息,这里使用的 configMap
        - name: config
          configMap:
            defaultMode: 0600
            name: sai-config

应用

kubectl apply -f sai-config.yaml

测试

使用 kubectl 查看

kubectl get deployment
kubectl get service

kubectl-apply

测试:

# port-forward 可以将集群映射到本地,方便debug
kubectl port-forward svc/sai 8088:80

可以看到请求是成功! http://127.0.0.1:8088/

当然,也可以使用 NodePort

apiVersion: v1
kind: Service
metadata:
  name: sai
  labels: # 标签
    app: sai
spec: # 描述
  type: NodePort
  ports:
  - protocol: TCP
    port: 8080
    nodePort: 31080
  selector:
    app: sai

nodePort


kubernete实战篇-Deployment部署
https://github.13sai.com/2022/08/11/431/
作者
13sai
许可协议