Implementation of k8s deployment of docker container

Environment: (docker, k8s cluster), continue with the image of the java program started by docker last time as an example (https://www.jb51.net/article/189462.htm)

Push the created image to Docker's private repository

docker tag demo-img:latest localhost:5000/demo-img:1.0

docker push localhost:5000/demo-img:1.0 

k8s deploys the image k8s creates a namespace and secret

Create a namespace cl-test. Define the name according to your own naming convention. I use this for testing.

kubectl create namespace cl-test

After creating ns, we need to create a secret for this ns

kubectl create secret docker-registry regcred --docker-server=your registry ip:5000 --docker-username=root --docker-password=xxxx@ [email protected] -n cl-test

The console returns "secret/regcred created" to indicate successful creation.

Create a yaml file for the demo service. We put service and deployment in one yaml file.

---

apiVersion: v1
kind: Service
metadata:
 name: demo-service
 namespace: cl-test
 labels:
 app: demo-service
spec:
 type: NodePort
 ports:
 - port: 8701
 targetPort: 8701
 protocol: TCP
 name: http
 selector:
 app: demo-pod
---
apiVersion: apps/v1
kind: Deployment
metadata:
 name: demo-deployment
 namespace: cl-test
spec:
 selector:
 matchLabels:
  app: demo-pod
 replicas: 1
 template:
 metadata:
  labels:
  app: demo-pod
 spec:
  containers:
  - name: demo-container
  image: localhost:5000/demo-img:1.0 #The image name + version of the local private image library ports:
  - containerPort: 8701

start up

kubectl create -f demo.yaml

View Pods

kubectl get pod -n cl-test 

Check the pod log, which is exactly the log we displayed when Java was started before

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