docker - 如何使用 kubectl 补丁更改 kubernetes 容器的端口?
问题描述
我想更改在我的 kubernetes 集群上运行的容器的端口。手动我知道这可以在底层 YAML 文件本身中更改。但我想使用“kubectl patch”之类的命令来更改端口。
Nginx.yaml
apiVersion: v1
kind: Service
metadata:
name: nginx
labels:
app: nginx
spec:
type: NodePort
ports:
- name: nginxport
port: 80
targetPort: 80
nodePort: 30000
selector:
app: nginx
tier: frontend
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: nginx
labels:
app: nginx
spec:
selector:
matchLabels:
app: nginx
tier: frontend
strategy:
type: Recreate
template:
metadata:
labels:
app: nginx
tier: frontend
spec:
containers:
- image: suji165475/devops-sample:#{Build.BuildId}#
name: nginx
ports:
- containerPort: 80
name: nginxport
任何人都可以向我展示“kubectl patch”命令的示例,使用我的 nginx.yaml 作为更改容器属性(如容器端口、目标端口、节点端口、端口)的示例。而且我还想知道在什么基础上应用了 kubectl 补丁。我的意思是它如何知道要修补的容器以及容器 ID、名称等标准,因为稍后我将创建一个 html 按钮来基于一些标准,如容器 ID 或名称。所以请帮忙。
解决方案
比如说,您想在服务中将目标端口更新为 8080。请按照以下步骤操作
apiVersion: v1
kind: Service
metadata:
name: nginx
labels:
app: nginx
spec:
type: NodePort
ports:
- name: nginxport
port: 80
targetPort: 80
nodePort: 30000
selector:
app: nginx
tier: frontend
使用以下命令修补 nginx 服务
# kubectl patch svc nginx --patch \
> '{"spec": { "type": "NodePort", "ports": [ { "nodePort": 30000, "port": 80, "protocol": "TCP", "targetPort": 8080 } ] } }'
service/nginx patched
to update nodeport and targetport use the below command
kubectl patch svc nginx --patch \
'{"spec": { "type": "NodePort", "ports": [ { "nodePort": 32000, "port": 80, "protocol": "TCP", "targetPort": 8080 } ] } }'
验证 targetPort 是否更新为 8080
master $ kubectl get svc nginx -oyamlapiVersion: v1
kind: Service
metadata:
creationTimestamp: "2019-08-29T11:08:45Z"
labels:
app: nginx
name: nginx
namespace: default
resourceVersion: "5837"
selfLink: /api/v1/namespaces/default/services/nginx
uid: 5e7f6165-ca4d-11e9-be03-0242ac110042
spec:
clusterIP: 10.105.220.186
externalTrafficPolicy: Cluster
ports:
- name: nginxport
nodePort: 30000
port: 80
protocol: TCP
targetPort: 8080
selector:
app: nginx
tier: frontend
sessionAffinity: None
type: NodePort
status:
loadBalancer: {}
使用类似的方法进行部署
kubectl patch deploy nginx --patch .....