k8s創建服務與公開接口
1.創建服務
服務創建會用應用的標簽確定哪個pod
部署服務
cat nginx.yml
apiVersion: apps/v1beta1
kind: Deployment
metadata:
name: nginx
spec:
replicas: 4
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx
image: nginx
ports:
- containerPort: 80 #此處暫不起作用
創建服務
cat servi.yml
apiVersion: v1
kind: Service
metadata:
name: nginx
spec:
# type: NodePort
selector:
app: nginx
ports:
- protocol: TCP
# nodePort: 30000
port: 8080
targetPort: 80
kubectl apply -f servi.yml
kubectl get service
kubectl describe service nginx #查看服務詳細信息
所有實現均通過防火墻實現
2.訪問服務
查看命名空間
kubectl get namespace
kubectl get deployment --namespace=kube-system
訪問service
可以通過服務名.空間名：端口形式訪問
查看服務空間名
3.創建服務分配不同命名空間
多個服務寫入一個文件”---”分隔
cat ng.yml
apiVersion: apps/v1beta1
kind: Deployment
metadata:
name: nginx
namespace: kube-public
spec:
replicas: 3
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx
image: nginx
ports:
- containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
name: nginx
namespace: kube-public
spec:
selector:
app: nginx
ports:
- protocol: TCP
port: 8080
targetPort: 80
跨空間訪問
kubectl run busybox --rm -ti --image=busybox /bin/sh
8. 公網訪問pod
cat ng.yml
apiVersion: apps/v1beta1
kind: Deployment
metadata:
name: nginx
namespace: kube-public
spec:
replicas: 3
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx
image: nginx
ports:
- containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
name: nginx
namespace: kube-public
spec:
selector:
app: nginx
ports:
- protocol: TCP
port: 8080
targetPort: 80
---
apiVersion: v1
kind: Service
metadata:
name: nginx
namespace: kube-public
spec:
type: NodePort
selector:
app: nginx
ports:
- protocol: TCP
nodePort: 30000 #固定端口30000-32767，不寫會自動分配
port: 8080
targetPort: 80
kubectl get service --namespace=kube-public 查看非默認空間
kubectl get pod --namespace=kube-public
k8s創建服務與公開接口