Yyds dry goods inventory kubernetes introduction foundation pod concept and related operations

k8s You can't run the program directly ,k8s The smallest scheduling unit in the cluster is pod,Pod It's the packaging of the container . So we need to use Pod To run the application

The goal of this issue

• understand Pod Concept
• see Pod
• establish Pod
• Pod visit
• Delete Pod

1. see Pod

Default query default In namespace Pod

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kubectl get pod
#  or 
kubectl get pods

     

      
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View... For the specified namespace Pod

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kubectl get pods --namespace default
#  or 
kubectl get pods -n default

     

      
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See... For all namespaces Pod

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kubectl get pods --all-namespaces

     

      
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2. establish Pod

Write for creating Pod List of resources file create-pod.yaml

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apiVersion: v1
kind: Pod
metadata:
  name: pod1
spec:
  containers:
  - name: nginx-pod
    image: nginx:latest
    imagePullPolicy: IfNotPresent
    ports:
    - name: nginxport
      containerPort: 80

     

      
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Execute application command , Will be created in the default namespace Pod

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kubectl apply -f create-pod.yaml

     

      
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To see Pod On which node , You can use the following command

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kubectl get pods -o wide

     

      
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This time we created nginx, So you can use access Pod Of IP To verify .

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curl http://10.244.1.2

     

      
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Get into Pod in

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#  Get into bash
kubectl exec -it POD name  -- bash
#  sign out  bash
exit

     

      
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3. Delete Pod

Use the command to delete Pod

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#  Delete by default default Under the namespace Pod
kubectl delete pods pod1
#  Or specify namespace deletion 
kubectl delete pods pod1 -n default

     

      
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Use the resource list to perform the deletion , If in 2 Created in the Pod, You can use the following command to delete

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kubectl delete -f create-pod.yaml

     

      
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