K8S常用命令
Kubernetes（K8s）是一个开源系统，用于自动部署、扩展和管理容器化应用程序。在使用Kubernetes时，你会经常使用kubectl命令行工具来与Kubernetes集群交互。以下是一些常用的kubectl请注意，上述命令可能需要根据你的Kubernetes集群和命名空间进行适当的调整。例如，如果你想要在特定的命名空间中获取资源信息，你需要添加到命令中。
·
常用命令
Kubernetes（K8s）是一个开源系统，用于自动部署、扩展和管理容器化应用程序。在使用Kubernetes时，你会经常使用kubectl命令行工具来与Kubernetes集群交互。以下是一些常用的kubectl命令：
-
获取资源信息
kubectl get nodes- 列出所有节点。kubectl get pods- 列出当前命名空间的所有Pods。kubectl get deployments- 列出当前命名空间的所有部署。kubectl get services- 列出当前命名空间的所有服务。kubectl get namespaces- 列出集群的所有命名空间。
-
创建和删除资源
kubectl create -f <file.yaml>- 通过文件创建资源。kubectl delete -f <file.yaml>- 通过文件删除资源。kubectl delete pods, services -l <label>- 删除具有特定标签的所有Pods和Services。
-
描述和检查资源
kubectl describe nodes <node-name>- 显示一个节点的详细信息。kubectl describe pods <pod-name>- 显示一个Pod的详细信息。kubectl logs <pod-name>- 显示Pod的日志。kubectl exec -it <pod-name> -- <command>- 在Pod中执行命令。
-
资源编辑和更新
kubectl edit <resource-type>/<name>- 编辑资源并应用更改。kubectl apply -f <file.yaml>- 应用文件中的配置更改。
-
资源扩缩容
kubectl scale deployment <deployment-name> --replicas=<num-replicas>- 调整部署的副本数量。
-
资源标签和注解
kubectl label pods <pod-name> <label-key>=<label-value>- 给Pod添加一个新的标签。kubectl annotate pods <pod-name> <annotation-key>=<annotation-value>- 给Pod添加一个新的注解。
-
端口转发和代理
kubectl port-forward <pod-name> <local-port>:<pod-port>- 将本地端口转发到Pod端口。kubectl proxy- 运行一个Kubernetes API服务器代理。
-
配置上下文和集群信息
kubectl config view- 显示kubectl的配置。kubectl config current-context- 显示当前的上下文。kubectl config set-context <context-name>- 设置当前的上下文。
-
资源回滚
kubectl rollout undo deployment/<deployment-name>- 回滚到上一个版本的部署。
-
查看资源状态和事件
kubectl get events- 查看集群事件。kubectl rollout status deployment/<deployment-name>- 查看部署的状态。
请注意，上述命令可能需要根据你的Kubernetes集群和命名空间进行适当的调整。例如，如果你想要在特定的命名空间中获取资源信息，你需要添加-n <namespace>到命令中。
实际执行显示
- 显示node信息
kubectl get node
kubectl get nodes -o wide
root@ab-P10S-WS:/home/ab# kubectl get nodes -o wide
NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME
bitmain-p10s-ws Ready control-plane 19d v1.25.4 172.28.9.241 <none> Ubuntu 20.04.6 LTS 5.15.0-92-generic containerd://1.6.26
se9-6t Ready <none> 19d v1.25.4 172.28.9.40 <none> Ubuntu 20.04 LTS 5.10.4-tag--00042-g04fcbe819955 containerd://1.6.26
sophon NotReady <none> 19d v1.25.4 172.28.9.130 <none> Ubuntu 20.04 LTS 5.10.4-tag--00042-g04fcbe819955 containerd://1.6.26
root@bitmain-P10S-WS:/home/bitmain# kubectl get node
NAME STATUS ROLES AGE VERSION
bitmain-p10s-ws Ready control-plane 19d v1.25.4
se9-6t Ready <none> 19d v1.25.4
sophon NotReady <none>
- 显示pod信息
kubectl get pods -A
kubectl get pods -A -o wide
root@ab-P10S-WS:/home/ab# kubectl get pods -A
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-flannel kube-flannel-ds-m795j 1/1 Running 0 19d
kube-flannel kube-flannel-ds-prbnz 1/1 Running 0 19d
kube-flannel kube-flannel-ds-zvtfk 1/1 Running 0 19d
kube-system bitmain-tpu-plugin-mgxvm 0/1 ErrImagePull 0 19d
kube-system bitmain-tpu-plugin-pjnvz 0/1 ImagePullBackOff 0 19d
kube-system coredns-565d847f94-8h7zw 1/1 Running 0 19d
kube-system coredns-565d847f94-s4rsm 1/1 Running 0 19d
kube-system etcd-bitmain-p10s-ws 1/1 Running 0 19d
kube-system kube-apiserver-bitmain-p10s-ws 1/1 Running 0 19d
kube-system kube-controller-manager-bitmain-p10s-ws 1/1 Running 0 19d
kube-system kube-proxy-5d496 1/1 Running 0 19d
kube-system kube-proxy-fzc5p 1/1 Running 0 19d
kube-system kube-proxy-jnjkp 1/1 Running 0 19d
kube-system kube-scheduler-bitmain-p10s-ws 1/1 Running 0 19d
kube-system nginx-t-5dc4b58b8-fjfsx 0/1 Pending 0 16d
kube-system nginx-t-5dc4b58b8-qtxcp 1/1 Running 0 19d
kube-system nginx-t-5dc4b58b8-zfw4c 1/1 Terminating 0 19d
root@bitmain-P10S-WS:/home/bitmain# kubectl get pods -A -o wide
NAMESPACE NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
kube-flannel kube-flannel-ds-m795j 1/1 Running 0 19d 172.28.9.241 bitmain-p10s-ws <none> <none>
kube-flannel kube-flannel-ds-prbnz 1/1 Running 0 19d 172.28.9.130 sophon <none> <none>
kube-flannel kube-flannel-ds-zvtfk 1/1 Running 0 19d 172.28.9.40 se9-6t <none> <none>
kube-system bitmain-tpu-plugin-mgxvm 0/1 ErrImagePull 0 19d 10.244.2.5 se9-6t <none> <none>
kube-system bitmain-tpu-plugin-pjnvz 0/1 ImagePullBackOff 0 19d 10.244.1.5 sophon <none> <none>
kube-system coredns-565d847f94-8h7zw 1/1 Running 0 19d 10.244.0.2 bitmain-p10s-ws <none> <none>
kube-system coredns-565d847f94-s4rsm 1/1 Running 0 19d 10.244.0.3 bitmain-p10s-ws <none> <none>
kube-system etcd-bitmain-p10s-ws 1/1 Running 0 19d 172.28.9.241 bitmain-p10s-ws <none> <none>
kube-system kube-apiserver-bitmain-p10s-ws 1/1 Running 0 19d 172.28.9.241 bitmain-p10s-ws <none> <none>
kube-system kube-controller-manager-bitmain-p10s-ws 1/1 Running 0 19d 172.28.9.241 bitmain-p10s-ws <none> <none>
kube-system kube-proxy-5d496 1/1 Running 0 19d 172.28.9.130 sophon <none> <none>
kube-system kube-proxy-fzc5p 1/1 Running 0 19d 172.28.9.241 bitmain-p10s-ws <none> <none>
kube-system kube-proxy-jnjkp 1/1 Running 0 19d 172.28.9.40 se9-6t <none> <none>
kube-system kube-scheduler-bitmain-p10s-ws 1/1 Running 0 19d 172.28.9.241 bitmain-p10s-ws <none> <none>
kube-system nginx-t-5dc4b58b8-fjfsx 0/1 Pending 0 16d <none> <none> <none> <none>
kube-system nginx-t-5dc4b58b8-qtxcp 1/1 Running 0 19d 10.244.2.3 se9-6t <none> <none>
kube-system nginx-t-5dc4b58b8-zfw4c 1/1 Terminating 0 19d 10.244.1.3 sophon <none> <none>
root@ab-P10S-WS:/home/ab#
- 显示指定namespace的pod信息
kubectl get pods -n kube-flannel
kubectl get pods -n kube-flannel -o wide
root@ab-P10S-WS:/home/ab# kubectl get pods -n kube-flannel
NAME READY STATUS RESTARTS AGE
kube-flannel-ds-m795j 1/1 Running 0 19d
kube-flannel-ds-prbnz 1/1 Running 0 19d
kube-flannel-ds-zvtfk 1/1 Running 0 19d
root@bitmain-P10S-WS:/home/bitmain# kubectl get pods -n kube-flannel -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
kube-flannel-ds-m795j 1/1 Running 0 19d 172.28.9.241 bitmain-p10s-ws <none> <none>
kube-flannel-ds-prbnz 1/1 Running 0 19d 172.28.9.130 sophon <none> <none>
kube-flannel-ds-zvtfk 1/1 Running 0 19d 172.28.9.40 se9-6t <none> <none>
- 显示node详细信息
kubectl describe nodes se9-6t
root@bitmain-P10S-WS:/home/bitmain# kubectl describe nodes se9-6t
Name: se9-6t
Roles: <none>
Labels: beta.kubernetes.io/arch=arm64
beta.kubernetes.io/os=linux
kubernetes.io/arch=arm64
kubernetes.io/hostname=se9-6t
kubernetes.io/os=linux
Annotations: flannel.alpha.coreos.com/backend-data: {"VNI":1,"VtepMAC":"16:7b:8f:9e:63:06"}
flannel.alpha.coreos.com/backend-type: vxlan
flannel.alpha.coreos.com/kube-subnet-manager: true
flannel.alpha.coreos.com/public-ip: 172.28.9.40
kubeadm.alpha.kubernetes.io/cri-socket: unix:///var/run/containerd/containerd.sock
node.alpha.kubernetes.io/ttl: 0
volumes.kubernetes.io/controller-managed-attach-detach: true
CreationTimestamp: Wed, 31 Jan 2024 09:42:42 +0800
Taints: <none>
Unschedulable: false
Lease:
HolderIdentity: se9-6t
AcquireTime: <unset>
RenewTime: Mon, 19 Feb 2024 17:24:41 +0800
Conditions:
Type Status LastHeartbeatTime LastTransitionTime Reason Message
---- ------ ----------------- ------------------ ------ -------
NetworkUnavailable False Wed, 31 Jan 2024 09:44:27 +0800 Wed, 31 Jan 2024 09:44:27 +0800 FlannelIsUp Flannel is running on this node
MemoryPressure False Mon, 19 Feb 2024 17:21:17 +0800 Wed, 31 Jan 2024 09:42:42 +0800 KubeletHasSufficientMemory kubelet has sufficient memory available
DiskPressure False Mon, 19 Feb 2024 17:21:17 +0800 Wed, 31 Jan 2024 09:42:42 +0800 KubeletHasNoDiskPressure kubelet has no disk pressure
PIDPressure False Mon, 19 Feb 2024 17:21:17 +0800 Wed, 31 Jan 2024 09:42:42 +0800 KubeletHasSufficientPID kubelet has sufficient PID available
Ready True Mon, 19 Feb 2024 17:21:17 +0800 Wed, 31 Jan 2024 09:44:35 +0800 KubeletReady kubelet is posting ready status
Addresses:
InternalIP: 172.28.9.40
Hostname: se9-6t
Capacity:
cpu: 6
ephemeral-storage: 9079836Ki
hugepages-1Gi: 0
hugepages-2Mi: 0
hugepages-32Mi: 0
hugepages-64Ki: 0
memory: 1212680Ki
pods: 110
tpu.bitmain.com/bm1688: 0
Allocatable:
cpu: 6
ephemeral-storage: 8367976844
hugepages-1Gi: 0
hugepages-2Mi: 0
hugepages-32Mi: 0
hugepages-64Ki: 0
memory: 1110280Ki
pods: 110
tpu.bitmain.com/bm1688: 0
System Info:
Machine ID: 1eef0b5f42d64d108c592bddfbc61a20
System UUID: 1eef0b5f42d64d108c592bddfbc61a20
Boot ID: 26141532-3000-45c2-a5cb-d0a4d96b41e5
Kernel Version: 5.10.4-tag--00042-g04fcbe819955
OS Image: Ubuntu 20.04 LTS
Operating System: linux
Architecture: arm64
Container Runtime Version: containerd://1.6.26
Kubelet Version: v1.25.4
Kube-Proxy Version: v1.25.4
PodCIDR: 10.244.2.0/24
PodCIDRs: 10.244.2.0/24
Non-terminated Pods: (4 in total)
Namespace Name CPU Requests CPU Limits Memory Requests Memory Limits Age
--------- ---- ------------ ---------- --------------- ------------- ---
kube-flannel kube-flannel-ds-zvtfk 100m (1%) 100m (1%) 50Mi (4%) 50Mi (4%) 19d
kube-system bitmain-tpu-plugin-mgxvm 0 (0%) 0 (0%) 0 (0%) 0 (0%) 19d
kube-system kube-proxy-jnjkp 0 (0%) 0 (0%) 0 (0%) 0 (0%) 19d
kube-system nginx-t-5dc4b58b8-qtxcp 0 (0%) 0 (0%) 0 (0%) 0 (0%) 19d
Allocated resources:
(Total limits may be over 100 percent, i.e., overcommitted.)
Resource Requests Limits
-------- -------- ------
cpu 100m (1%) 100m (1%)
memory 50Mi (4%) 50Mi (4%)
ephemeral-storage 0 (0%) 0 (0%)
hugepages-1Gi 0 (0%) 0 (0%)
hugepages-2Mi 0 (0%) 0 (0%)
hugepages-32Mi 0 (0%) 0 (0%)
hugepages-64Ki 0 (0%) 0 (0%)
tpu.bitmain.com/bm1688 1 1
Events: <none>
root@ab-P10S-WS:/home/ab#
- 显示pod的详细信息
kubectl describe pods kube-flannel-ds-zvtfk -n kube-flannel
root@ab-P10S-WS:/home/ab# kubectl describe pods kube-flannel-ds-zvtfk -n kube-flannel
Name: kube-flannel-ds-zvtfk
Namespace: kube-flannel
Priority: 2000001000
Priority Class Name: system-node-critical
Service Account: flannel
Node: se9-6t/172.28.9.40
Start Time: Wed, 31 Jan 2024 09:42:51 +0800
Labels: app=flannel
controller-revision-hash=7f4d65bc74
pod-template-generation=1
tier=node
Annotations: <none>
Status: Running
IP: 172.28.9.40
IPs:
IP: 172.28.9.40
Controlled By: DaemonSet/kube-flannel-ds
Init Containers:
install-cni-plugin:
Container ID: containerd://f588bfdd8eb6255562c398e3da95337238f126425b1bea0a42f236e639237424
Image: docker.io/rancher/mirrored-flannelcni-flannel-cni-plugin:v1.1.0
Image ID: docker.io/rancher/mirrored-flannelcni-flannel-cni-plugin@sha256:28d3a6be9f450282bf42e4dad143d41da23e3d91f66f19c01ee7fd21fd17cb2b
Port: <none>
Host Port: <none>
Command:
cp
Args:
-f
/flannel
/opt/cni/bin/flannel
State: Terminated
Reason: Completed
Exit Code: 0
Started: Wed, 31 Jan 2024 09:43:39 +0800
Finished: Wed, 31 Jan 2024 09:43:39 +0800
Ready: True
Restart Count: 0
Environment: <none>
Mounts:
/opt/cni/bin from cni-plugin (rw)
/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-qkttm (ro)
install-cni:
Container ID: containerd://1cb07980a3f30aac58fca774323edb7e2aacf84554b213332834af4dbc4ef7f9
Image: docker.io/rancher/mirrored-flannelcni-flannel:v0.20.2
Image ID: docker.io/rancher/mirrored-flannelcni-flannel@sha256:ec0f0b7430c8370c9f33fe76eb0392c1ad2ddf4ccaf2b9f43995cca6c94d3832
Port: <none>
Host Port: <none>
Command:
cp
Args:
-f
/etc/kube-flannel/cni-conf.json
/etc/cni/net.d/10-flannel.conflist
State: Terminated
Reason: Completed
Exit Code: 0
Started: Wed, 31 Jan 2024 09:44:22 +0800
Finished: Wed, 31 Jan 2024 09:44:22 +0800
Ready: True
Restart Count: 0
Environment: <none>
Mounts:
/etc/cni/net.d from cni (rw)
/etc/kube-flannel/ from flannel-cfg (rw)
/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-qkttm (ro)
Containers:
kube-flannel:
Container ID: containerd://7005b97fe8473c2469a7b4b97cf219673e0ef8b26855879b4e2f2e24722aef97
Image: docker.io/rancher/mirrored-flannelcni-flannel:v0.20.2
Image ID: docker.io/rancher/mirrored-flannelcni-flannel@sha256:ec0f0b7430c8370c9f33fe76eb0392c1ad2ddf4ccaf2b9f43995cca6c94d3832
Port: <none>
Host Port: <none>
Command:
/opt/bin/flanneld
Args:
--ip-masq
--kube-subnet-mgr
State: Running
Started: Wed, 31 Jan 2024 09:44:24 +0800
Ready: True
Restart Count: 0
Limits:
cpu: 100m
memory: 50Mi
Requests:
cpu: 100m
memory: 50Mi
Environment:
POD_NAME: kube-flannel-ds-zvtfk (v1:metadata.name)
POD_NAMESPACE: kube-flannel (v1:metadata.namespace)
EVENT_QUEUE_DEPTH: 5000
Mounts:
/etc/kube-flannel/ from flannel-cfg (rw)
/run/flannel from run (rw)
/run/xtables.lock from xtables-lock (rw)
/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-qkttm (ro)
Conditions:
Type Status
Initialized True
Ready True
ContainersReady True
PodScheduled True
Volumes:
run:
Type: HostPath (bare host directory volume)
Path: /run/flannel
HostPathType:
cni-plugin:
Type: HostPath (bare host directory volume)
Path: /opt/cni/bin
HostPathType:
cni:
Type: HostPath (bare host directory volume)
Path: /etc/cni/net.d
HostPathType:
flannel-cfg:
Type: ConfigMap (a volume populated by a ConfigMap)
Name: kube-flannel-cfg
Optional: false
xtables-lock:
Type: HostPath (bare host directory volume)
Path: /run/xtables.lock
HostPathType: FileOrCreate
kube-api-access-qkttm:
Type: Projected (a volume that contains injected data from multiple sources)
TokenExpirationSeconds: 3607
ConfigMapName: kube-root-ca.crt
ConfigMapOptional: <nil>
DownwardAPI: true
QoS Class: Burstable
Node-Selectors: <none>
Tolerations: :NoSchedule op=Exists
node.kubernetes.io/disk-pressure:NoSchedule op=Exists
node.kubernetes.io/memory-pressure:NoSchedule op=Exists
node.kubernetes.io/network-unavailable:NoSchedule op=Exists
node.kubernetes.io/not-ready:NoExecute op=Exists
node.kubernetes.io/pid-pressure:NoSchedule op=Exists
node.kubernetes.io/unreachable:NoExecute op=Exists
node.kubernetes.io/unschedulable:NoSchedule op=Exists
Events: <none>
root@ab-P10S-WS:/home/ab#
- 删除node
kubectl delete node sophon
此时kubectl get node -A 中已经没有，但kubectl get pods -A -o wide中还有，需要执行：
kubectl delete pod nginx-t-5dc4b58b8-zfw4c --grace-period=0 --force -n kube-system
此时有提示：
Warning: Immediate deletion does not wait for confirmation that the running resource has been terminated. The resource may continue to run on the cluster indefinitely.
Error from server (NotFound): pods “nginx-t-5dc4b58b8-zfw4c” not found
再kubectl get pods -A -o wide 此时kubectl get pods -A -o wide中已经没有sophon节点的信息了
root@ab-P10S-WS:/home/ab# kubectl get node
NAME STATUS ROLES AGE VERSION
bitmain-p10s-ws Ready control-plane 19d v1.25.4
se9-6t Ready <none> 19d v1.25.4
sophon NotReady <none> 19d v1.25.4
root@ab-P10S-WS:/home/ab# kubectl delete node sophon
node "sophon" deleted
root@ab-P10S-WS:/home/ab# kubectl get node
NAME STATUS ROLES AGE VERSION
bitmain-p10s-ws Ready control-plane 19d v1.25.4
se9-6t Ready <none> 19d v1.25.4
root@ab-P10S-WS:/home/ab# kubectl get pods -A -o wide
NAMESPACE NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
kube-flannel kube-flannel-ds-m795j 1/1 Running 0 19d 172.28.9.241 bitmain-p10s-ws <none> <none>
kube-flannel kube-flannel-ds-prbnz 1/1 Running 0 19d 172.28.9.130 sophon <none> <none>
kube-flannel kube-flannel-ds-zvtfk 1/1 Running 0 19d 172.28.9.40 se9-6t <none> <none>
kube-system bitmain-tpu-plugin-mgxvm 0/1 ImagePullBackOff 0 19d 10.244.2.5 se9-6t <none> <none>
kube-system bitmain-tpu-plugin-pjnvz 0/1 ImagePullBackOff 0 19d 10.244.1.5 sophon <none> <none>
kube-system coredns-565d847f94-8h7zw 1/1 Running 0 19d 10.244.0.2 bitmain-p10s-ws <none> <none>
kube-system coredns-565d847f94-s4rsm 1/1 Running 0 19d 10.244.0.3 bitmain-p10s-ws <none> <none>
kube-system etcd-bitmain-p10s-ws 1/1 Running 0 19d 172.28.9.241 bitmain-p10s-ws <none> <none>
kube-system kube-apiserver-bitmain-p10s-ws 1/1 Running 0 19d 172.28.9.241 bitmain-p10s-ws <none> <none>
kube-system kube-controller-manager-bitmain-p10s-ws 1/1 Running 0 19d 172.28.9.241 bitmain-p10s-ws <none> <none>
kube-system kube-proxy-5d496 1/1 Running 0 19d 172.28.9.130 sophon <none> <none>
kube-system kube-proxy-fzc5p 1/1 Running 0 19d 172.28.9.241 bitmain-p10s-ws <none> <none>
kube-system kube-proxy-jnjkp 1/1 Running 0 19d 172.28.9.40 se9-6t <none> <none>
kube-system kube-scheduler-bitmain-p10s-ws 1/1 Running 0 19d 172.28.9.241 bitmain-p10s-ws <none> <none>
kube-system nginx-t-5dc4b58b8-fjfsx 0/1 Pending 0 16d <none> <none> <none> <none>
kube-system nginx-t-5dc4b58b8-qtxcp 1/1 Running 0 19d 10.244.2.3 se9-6t <none> <none>
kube-system nginx-t-5dc4b58b8-zfw4c 1/1 Terminating 0 19d 10.244.1.3 sophon <none> <none>
root@ab-P10S-WS:/home/ab# kubectl delete pod <pod-name> --grace-period=0 --force -n <namespace>
bash: syntax error near unexpected token `newline'
root@ab-P10S-WS:/home/ab# kubectl delete pod nginx-t-5dc4b58b8-zfw4c --grace-period=0 --force -n kube-system
Warning: Immediate deletion does not wait for confirmation that the running resource has been terminated. The resource may continue to run on the cluster indefinitely.
Error from server (NotFound): pods "nginx-t-5dc4b58b8-zfw4c" not found
root@ab-P10S-WS:/home/ab# kubectl get pods -A -o wide
NAMESPACE NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
kube-flannel kube-flannel-ds-m795j 1/1 Running 0 19d 172.28.9.241 bitmain-p10s-ws <none> <none>
kube-flannel kube-flannel-ds-zvtfk 1/1 Running 0 19d 172.28.9.40 se9-6t <none> <none>
kube-system bitmain-tpu-plugin-mgxvm 0/1 ImagePullBackOff 0 19d 10.244.2.5 se9-6t <none> <none>
kube-system coredns-565d847f94-8h7zw 1/1 Running 0 19d 10.244.0.2 bitmain-p10s-ws <none> <none>
kube-system coredns-565d847f94-s4rsm 1/1 Running 0 19d 10.244.0.3 bitmain-p10s-ws <none> <none>
kube-system etcd-bitmain-p10s-ws 1/1 Running 0 19d 172.28.9.241 bitmain-p10s-ws <none> <none>
kube-system kube-apiserver-bitmain-p10s-ws 1/1 Running 0 19d 172.28.9.241 bitmain-p10s-ws <none> <none>
kube-system kube-controller-manager-bitmain-p10s-ws 1/1 Running 0 19d 172.28.9.241 bitmain-p10s-ws <none> <none>
kube-system kube-proxy-fzc5p 1/1 Running 0 19d 172.28.9.241 bitmain-p10s-ws <none> <none>
kube-system kube-proxy-jnjkp 1/1 Running 0 19d 172.28.9.40 se9-6t <none> <none>
kube-system kube-scheduler-bitmain-p10s-ws 1/1 Running 0 19d 172.28.9.241 bitmain-p10s-ws <none> <none>
kube-system nginx-t-5dc4b58b8-fjfsx 0/1 Pending 0 16d <none> <none> <none> <none>
kube-system nginx-t-5dc4b58b8-qtxcp 1/1 Running 0 19d 10.244.2.3 se9-6t <none> <none>
root@ab-P10S-WS:/home/ab#
- 进入node容器
kubectl exec nginx-t-5dc4b58b8-qtxcp -n kube-system -it – “bash”
root@ab-P10S-WS:/home/ab# kubectl get pods -A -o wide
NAMESPACE NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
kube-flannel kube-flannel-ds-m795j 1/1 Running 0 19d 172.28.9.241 bitmain-p10s-ws <none> <none>
kube-flannel kube-flannel-ds-zvtfk 1/1 Running 0 19d 172.28.9.40 se9-6t <none> <none>
kube-system bitmain-tpu-plugin-mgxvm 0/1 ImagePullBackOff 0 19d 10.244.2.5 se9-6t <none> <none>
kube-system coredns-565d847f94-8h7zw 1/1 Running 0 19d 10.244.0.2 bitmain-p10s-ws <none> <none>
kube-system coredns-565d847f94-s4rsm 1/1 Running 0 19d 10.244.0.3 bitmain-p10s-ws <none> <none>
kube-system etcd-bitmain-p10s-ws 1/1 Running 0 19d 172.28.9.241 bitmain-p10s-ws <none> <none>
kube-system kube-apiserver-bitmain-p10s-ws 1/1 Running 0 19d 172.28.9.241 bitmain-p10s-ws <none> <none>
kube-system kube-controller-manager-bitmain-p10s-ws 1/1 Running 0 19d 172.28.9.241 bitmain-p10s-ws <none> <none>
kube-system kube-proxy-fzc5p 1/1 Running 0 19d 172.28.9.241 bitmain-p10s-ws <none> <none>
kube-system kube-proxy-jnjkp 1/1 Running 0 19d 172.28.9.40 se9-6t <none> <none>
kube-system kube-scheduler-bitmain-p10s-ws 1/1 Running 0 19d 172.28.9.241 bitmain-p10s-ws <none> <none>
kube-system nginx-t-5dc4b58b8-fjfsx 0/1 Pending 0 16d <none> <none> <none> <none>
kube-system nginx-t-5dc4b58b8-qtxcp 1/1 Running 0 19d 10.244.2.3 se9-6t <none> <none>
root@ab-P10S-WS:/home/ab# kubectl exec nginx-t-5dc4b58b8-qtxcp -n kube-system -it -- "bash"
root@nginx-t-5dc4b58b8-qtxcp:/# ls /dev
bm-tpu0 fd ion null pts shm soph-dpu soph-ive soph-stitch soph-tde0 soph-vpss soph_vc_enc stdin termination-log urandom
bmdev-ctl full mqueue ptmx random soph-base soph-dwa soph-ldc soph-sys soph-tde1 soph_vc_dec stderr stdout tty zero
root@nginx-t-5dc4b58b8-qtxcp:/#
查看k8s服务
在使用systemctl来查看Kubernetes服务时，你通常是在检查Kubernetes集群的控制平面组件和节点组件的状态。这些组件可能是以系统服务的形式运行的，尤其是在使用kubeadm或其他类似工具部署的集群中。
下面是一些常用的systemctl命令来查看和管理Kubernetes服务：
查看kubelet服务状态：
systemctl status kubelet
kubelet是在每个节点上运行的主要“节点代理”，它负责维护和管理该节点上的容器。
查看所有Kubernetes相关服务：
systemctl list-units --type=service | grep kube
这将列出所有名称中包含“kube”的服务。
启动/停止/重启kubelet服务：
systemctl start kubelet
systemctl stop kubelet
systemctl restart kubelet
这些命令分别用于启动、停止和重启kubelet服务。
查看服务的日志：
journalctl -u kubelet
使用journalctl命令可以查看kubelet服务的日志。你可以替换kubelet为其他服务的名称，如docker、containerd或etcd等，以查看这些服务的日志。
启用/禁用服务自启动：
systemctl enable kubelet
systemctl disable kubelet
这些命令分别用于设置kubelet服务在系统启动时自动启动或禁用自启动。
请注意，Kubernetes的控制平面组件（如API服务器、控制器管理器、调度器等）可能不是作为系统服务运行的。在某些安装中，这些组件可能是作为容器运行的，特别是在使用kubeadm等工具时。在这种情况下，你不会看到这些组件作为单独的服务出现在systemctl的输出中。如果你的控制平面组件是作为Pod运行的，你应该使用kubectl来管理和检查它们的状态，而不是systemctl。
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