1.nodeport 和ClusterIP

apiVersion: v1
kind: Service
#apiVersion: v1
#kind: Servive
metadata:
  name: nginx-svc
  namespace: default
spec:
  type: NodePort
  #定義類型為NodePort
  selector:
  #標(biāo)簽選擇,把需要轉(zhuǎn)發(fā)的后端的標(biāo)簽寫在下面
    app: nginx
  ports:
  - port: 80
    #service端口
    targetPort: 80
    #容器端口
    nodePort: 30080
    #node端口，如果是ClusterIP的這段不需要，也可以不填會隨機(jī)
---
apiVersion: v1
kind: Pod
metadata:
  name: ng1
  labels:
    app: web
spec:
  containers:
    - name: ng1
      image:  hub.c.163.com/library/nginx
      imagePullPolicy: IfNotPresent

nodeport 和ClusterIP 用法差不多就類型填的不一樣，還有ClusterIP不用填nodePort

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Deployment控制器

apiVersion: v1
kind: Service
metadata:
name: nginx-svc
namespace: default
spec:
type: NodePort
#定義類型為NodePort
selector:
#標(biāo)簽選擇,把需要轉(zhuǎn)發(fā)的后端的標(biāo)簽寫在下面
    app: web
ports:
- port: 90
    #service端口
    targetPort: 80
    #容器端口
    nodePort: 30080
    #node端口，如果是ClusterIP的這段不需要，也可以不填會隨機(jī)
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx
spec:
replicas: 2
#表示啟動兩個容器
selector:
    matchLabels:
            app: nginx
#匹配標(biāo)簽
template:
#這下面的和pod寫法一樣
    metadata:
        labels:
            app: nginx
    spec:
        containers:
        - name: ng1
            image:  hub.c.163.com/library/nginx
            imagePullPolicy: IfNotPresent

2.daemonset控制器和service無頭服務(wù)

apiVersion: apps/v1
kind: DaemonSet
#控制器類型dae...,這種控制器會把每一個node的節(jié)點(diǎn)都啟動一個下面標(biāo)簽匹配的容器,有污點(diǎn)的除外
metadata:
  name: nginx-daemonset
  namespace: default
spec:
  selector:
    matchLabels:
      app: nginx
  template:
    metadata:
      labels:
        app: nginx
    spec:
      containers:
      - name: nginx
        image: "ikubernetes/myapp:v1"
---
apiVersion: v1
kind: Service
metadata:
  name: nginx-service
  namespace: default
spec:
  selector:
    app: nginx
  clusterIP: None
  ports:
  - port: 80
    targetPort: 80

service的無頭服務(wù)適用于有些服務(wù)直接要和后端的容器建立連接場景使用的

[root@cs25 ~]# kubectl get pod  -l app=myapp -o wide
NAME                            READY   STATUS    RESTARTS   AGE   IP               NODE   NOMINATED NODE   READINESS GATES
myapp-deploy-6c7db749dd-4kjdh   1/1     Running   0          31m   192.168.94.170   cs27              
myapp-deploy-6c7db749dd-x95d6   1/1     Running   0          31m   192.168.100.2    cs25              
#查看兩個后端容器的ip

[root@cs25 ~]# dig nginx-service.default.svc.cluster.local

; <<>> DiG 9.9.4-RedHat-9.9.4-72.el7 <<>> nginx-service.default.svc.cluster.local
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 16814
;; flags: qr aa rd; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; WARNING: recursion requested but not available

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;nginx-service.default.svc.cluster.local. IN A

;; ANSWER SECTION:
nginx-service.default.svc.cluster.local. 30 IN A 192.168.100.47
nginx-service.default.svc.cluster.local. 30 IN A 192.168.94.168

;; Query time: 4 msec
;; SERVER: 192.168.100.37#53(192.168.100.37)
;; WHEN: 一 12月 23 14:03:19 CST 2019
;; MSG SIZE  rcvd: 178
#解析域名  nginx-service.default.svc.cluster.local 看是不是解析的容器ip，上面可以看到兩個容器的ip都被解析到了，
#如果這邊是service帶ip就會解析成service ip由service代理至后端容器，無頭服務(wù)就是直接解析后端容器ip直接和容器建立連接。