一、配置文件方式配置Pod的名称和镜像

1.1 编写pod_base.yaml文件

如下，设置命名空间dev，pod中指定命名空间为dev，pod中有一个个容器，名称分别为nginx镜像分别使用1.17.1和1.17.3版本

apiVersion: v1
kind: Namespace
metadata:
  name: dev
---
apiVersion: v1
kind: Pod
metadata:
  name: pod-base
  namespace: dev
  labels:
    user: redrose2100
spec:
  containers:
  - name: nginx
    image: nginx:1.17.1

1.2 启动Pod

使用如下命令启动pod

[root@master pod]# kubectl apply -f pod_base.yaml
namespace/dev created
pod/pod-base created
[root@master pod]#

1.3 查看创建的Pod

使用如下命令查看pod的详细信息以及标签等

[root@master pod]# kubectl get pod -n dev -o wide --show-labels
NAME       READY   STATUS    RESTARTS   AGE   IP            NODE    NOMINATED NODE   READINESS GATES   LABELS
pod-base   1/1     Running   0          12s   10.244.2.24   node2   <none>           <none>            user=redrose2100
[root@master pod]#

通过如下命令可以查看Pod的更详细的信息和创建详细过程

[root@master pod]# kubectl describe pod pod-base -n dev
Name:         pod-base
Namespace:    dev
Priority:     0
Node:         node2/192.168.16.42
Start Time:   Mon, 21 Mar 2022 15:19:17 +0800
Labels:       user=redrose2100
Annotations:  <none>
Status:       Running
IP:           10.244.2.24
IPs:
  IP:  10.244.2.24
Containers:
  nginx:
    Container ID:   docker://5d2b7707956c7fc91dfec0b705917bfa64bb91e618450e946482d5621659c9aa
    Image:          nginx:1.17.1
    Image ID:       docker-pullable://nginx@sha256:b4b9b3eee194703fc2fa8afa5b7510c77ae70cfba567af1376a573a967c03dbb
    Port:           <none>
    Host Port:      <none>
    State:          Running
      Started:      Mon, 21 Mar 2022 15:19:18 +0800
    Ready:          True
    Restart Count:  0
    Environment:    <none>
    Mounts:
      /var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-42jtr (ro)
Conditions:
  Type              Status
  Initialized       True
  Ready             True
  ContainersReady   True
  PodScheduled      True
Volumes:
  kube-api-access-42jtr:
    Type:                    Projected (a volume that contains injected data from multiple sources)
    TokenExpirationSeconds:  3607
    ConfigMapName:           kube-root-ca.crt
    ConfigMapOptional:       <nil>
    DownwardAPI:             true
QoS Class:                   BestEffort
Node-Selectors:              <none>
Tolerations:                 node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
                             node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events:
  Type    Reason     Age   From               Message
  ----    ------     ----  ----               -------
  Normal  Scheduled  94s   default-scheduler  Successfully assigned dev/pod-base to node2
  Normal  Pulled     93s   kubelet            Container image "nginx:1.17.1" already present on machine
  Normal  Created    93s   kubelet            Created container nginx
  Normal  Started    93s   kubelet            Started container nginx
[root@master pod]#

1.4 删除创建的Pod

使用如下命令即可删除

[root@master pod]# kubectl delete -f pod_base.yaml
namespace "dev" deleted
pod "pod-base" deleted
[root@master pod]#