文章目录
- kubectl apply -f pod_nginx.yaml [Pod创建]
- kubectl get pods [获取当前pod]
- kubectl get pods -o wide [获取当前pod的详情]
- kubectl get pods --all-namespaces -w [查看所有namespace下的pod]
- kubectl get pods -n kube-system [查看k8s系统级别的pod]
- kubectl describe pod {pod_name} [获取某个pod的详细信息]
- kubectl exec -it {pod_name} sh [进入某个pod]
- kubectl delete -f {pod配置文件目录} [删除pod]
- kubectl delete pod {pod_name} [删除某个pod]
kubectl apply -f pod_nginx.yaml [Pod创建]
1.创建配置ymal文件
apiVersion: v1
kind: Pod
metadata:
name: nginx
labels:
app: nginx
spec:
containers:
- name: nginx
image: nginx
ports:
- containerPort: 80
2.启动Pod
[root@manager-node demo]# ls -la
total 4
drwxr-xr-x. 2 root root 36 Jan 5 01:28 .
dr-xr-x---. 7 root root 243 Jan 2 04:24 ..
-rw-r--r--. 1 root root 353 Jan 2 04:25 pod_nginx_kubeadm.yaml
[root@manager-node demo]# vi pod_nginx.yaml
[root@manager-node demo]# kubectl apply -f pod_nginx.yaml
pod/nginx created
[root@manager-node demo]# kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx 0/1 ContainerCreating 0 6s
[root@manager-node demo]#
kubectl get pods [获取当前pod]
1.这里注意下,kubectl get pods 只能在主节点才会有权限;
[root@manager-node ~]# kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx-5ltjv 0/1 Pending 0 114m
nginx-8g24r 0/1 Pending 0 114m
nginx-9t4qw 1/1 Terminating 1 4h50m
nginx-cmktg 1/1 Terminating 1 3h50m
nginx-t75nq 1/1 Terminating 1 3h50m
nginx-whjfv 0/1 Pending 0 114m
[root@manager-node ~]#
kubectl get pods -o wide [获取当前pod的详情]
[root@manager-node ~]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-5ltjv 0/1 Pending 0 114m <none> <none> <none> <none>
nginx-8g24r 0/1 Pending 0 114m <none> <none> <none> <none>
nginx-9t4qw 1/1 Terminating 1 4h51m 192.168.101.6 worker01-node <none> <none>
nginx-cmktg 1/1 Terminating 1 3h51m 192.168.101.5 worker01-node <none> <none>
nginx-t75nq 1/1 Terminating 1 3h51m 192.168.101.4 worker01-node <none> <none>
nginx-whjfv 0/1 Pending 0 114m <none> <none> <none> <none>
[root@manager-node ~]#
kubectl get pods --all-namespaces -w [查看所有namespace下的pod]
[root@manager-node demo]# kubectl get pods --all-namespaces -w
NAMESPACE NAME READY STATUS RESTARTS AGE
default nginx-fsm75 1/1 Running 0 105s
default nginx-vv4zn 1/1 Running 0 105s
default nginx-x4czm 1/1 Running 0 105s
kube-system calico-kube-controllers-594b6978c5-7lxqz 1/1 Running 4 39h
kube-system calico-node-82rx7 1/1 Running 4 39h
kube-system calico-node-xrqf8 1/1 Running 3 24h
kube-system calico-node-z86gh 1/1 Running 3 24h
kube-system coredns-fb8b8dccf-6hvcz 1/1 Running 4 39h
kube-system coredns-fb8b8dccf-x8xxc 1/1 Running 4 39h
kube-system etcd-manager-node 1/1 Running 4 39h
kube-system kube-apiserver-manager-node 1/1 Running 5 39h
kube-system kube-controller-manager-manager-node 1/1 Running 5 39h
kube-system kube-proxy-5q9b5 1/1 Running 4 24h
kube-system kube-proxy-pw6r7 1/1 Running 3 24h
kube-system kube-proxy-rvddm 1/1 Running 4 39h
kube-system kube-scheduler-manager-node 1/1 Running 6 39h
kubectl get pods -n kube-system [查看k8s系统级别的pod]
root@manager-node demo]# kubectl get pods -n kube-system
NAME READY STATUS RESTARTS AGE
calico-kube-controllers-594b6978c5-7lxqz 1/1 Running 1 16h
calico-node-82rx7 1/1 Running 1 16h
calico-node-xrqf8 1/1 Running 0 104m
calico-node-z86gh 1/1 Running 0 104m
coredns-fb8b8dccf-6hvcz 1/1 Running 1 16h
coredns-fb8b8dccf-x8xxc 1/1 Running 1 16h
etcd-manager-node 1/1 Running 1 16h
kube-apiserver-manager-node 1/1 Running 1 16h
kube-controller-manager-manager-node 1/1 Running 2 16h
kube-proxy-5q9b5 1/1 Running 0 104m
kube-proxy-pw6r7 1/1 Running 0 104m
kube-proxy-rvddm 1/1 Running 1 16h
kube-scheduler-manager-node 1/1 Running 3 16h
[root@manager-node demo]#
kubectl describe pod {pod_name} [获取某个pod的详细信息]
[root@manager-node ~]# kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx-5ltjv 0/1 Pending 0 116m
nginx-8g24r 0/1 Pending 0 116m
nginx-9t4qw 1/1 Terminating 1 4h52m
nginx-cmktg 1/1 Terminating 1 3h52m
nginx-t75nq 1/1 Terminating 1 3h52m
nginx-whjfv 0/1 Pending 0 116m
[root@manager-node ~]# kubectl describe pod nginx-5ltjv
Name: nginx-5ltjv
Namespace: default
Priority: 0
PriorityClassName: <none>
Node: <none>
Labels: tier=frontend
Annotations: <none>
Status: Pending
IP:
Controlled By: ReplicaSet/nginx
Containers:
nginx:
Image: nginx
Port: 80/TCP
Host Port: 0/TCP
Environment: <none>
Mounts:
/var/run/secrets/kubernetes.io/serviceaccount from default-token-bgkw6 (ro)
Conditions:
Type Status
PodScheduled False
Volumes:
default-token-bgkw6:
Type: Secret (a volume populated by a Secret)
SecretName: default-token-bgkw6
Optional: false
QoS Class: BestEffort
Node-Selectors: <none>
Tolerations: node.kubernetes.io/not-ready:NoExecute for 300s
node.kubernetes.io/unreachable:NoExecute for 300s
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Warning FailedScheduling 71s (x82 over 116m) default-scheduler 0/3 nodes are available: 3 node(s) had taints that the pod didn't tolerate.
[root@manager-node ~]#
kubectl exec -it {pod_name} sh [进入某个pod]
[root@manager-node ~]# kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx-5ltjv 1/1 Running 0 3h20m
nginx-8g24r 1/1 Running 0 3h20m
nginx-whjfv 1/1 Running 0 3h20m
[root@manager-node ~]# kubectl exec -it nginx-5ltjv sh
#
# pwd
/
# ls -la
total 8
drwxr-xr-x. 1 root root 28 Jan 2 10:09 .
drwxr-xr-x. 1 root root 28 Jan 2 10:09 ..
-rwxr-xr-x. 1 root root 0 Jan 2 10:09 .dockerenv
drwxr-xr-x. 2 root root 4096 Dec 24 00:00 bin
drwxr-xr-x. 2 root root 6 Nov 10 12:17 boot
drwxr-xr-x. 5 root root 360 Jan 2 10:09 dev
drwxr-xr-x. 1 root root 66 Jan 2 10:09 etc
drwxr-xr-x. 2 root root 6 Nov 10 12:17 home
drwxr-xr-x. 1 root root 56 Dec 28 15:20 lib
drwxr-xr-x. 2 root root 34 Dec 24 00:00 lib64
drwxr-xr-x. 2 root root 6 Dec 24 00:00 media
drwxr-xr-x. 2 root root 6 Dec 24 00:00 mnt
drwxr-xr-x. 2 root root 6 Dec 24 00:00 opt
dr-xr-xr-x. 134 root root 0 Jan 2 10:09 proc
drwx------. 2 root root 37 Dec 24 00:00 root
drwxr-xr-x. 1 root root 38 Jan 2 10:09 run
drwxr-xr-x. 2 root root 4096 Dec 24 00:00 sbin
drwxr-xr-x. 2 root root 6 Dec 24 00:00 srv
dr-xr-xr-x. 13 root root 0 Jan 2 10:08 sys
drwxrwxrwt. 1 root root 6 Dec 28 15:20 tmp
drwxr-xr-x. 1 root root 66 Dec 24 00:00 usr
drwxr-xr-x. 1 root root 19 Dec 24 00:00 var
#
备注
kubectl exec -it {pod_name} sh
当然也可以
kubectl exec -it {pod_name} bash
kubectl delete -f {pod配置文件目录} [删除pod]
[root@manager-node ~]# cd demo/
[root@manager-node demo]# ls -la
total 4
drwxr-xr-x. 2 root root 36 Jan 2 04:25 .
dr-xr-x---. 7 root root 243 Jan 2 04:24 ..
-rw-r--r--. 1 root root 353 Jan 2 04:25 pod_nginx_kubeadm.yaml
[root@manager-node demo]# pwd
/root/demo
[root@manager-node demo]# kubectl delete -f pod_nginx_kubeadm.yaml
replicaset.apps "nginx" deleted
[root@manager-node demo]#
[root@manager-node demo]# kubectl get pods
No resources found.
[root@manager-node demo]#
kubectl delete pod {pod_name} [删除某个pod]
[root@manager-node ~]# kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx 1/1 Running 1 21h 192.168.38.74 worker02-node <none> <none>
[root@manager-node ~]# kube
kubeadm/ kubectl kubelet
[root@manager-node ~]# kubectl delete pod nginx
pod "nginx" deleted
[root@manager-node ~]#