kubectl 命令

kubect get svc -n ingress-nginx
kubect get ns
kubect api-resources
kubect get pod -n kube-system 查看系统名称空间的pod
kubectl get pods --namespace=kube-system
kubect get rs -o wide
kubectl get pod --show-labels -A -l app
kubectl get rs -o wide
kubectl get ds
kubectl apply -f filebeat-daemonset.yaml
kubectl get svc
kubectl get pods -n ingress-nginx
kubectl get all -n namespace
kubectl get ingress -n namespace
kubectl get pods --namespace=ingress-nginx
kubectl exec -it ingress-nginx-controller-xn85x -n ingress-nginx /bin/bash
kubectl get pod,service -n ingress-nginx -o wide
kubectl get pods -n ingress-nginx
kubectl describe pod ingress-nginx-controller-9f64489f5-7pvwf -n ingress-nginx
kubectl get pod -n dev -o wide
kubectl get endpoints
kubect1 describe svc nginx
ipvsadm -Ln
kubectl logs
kubectl get pod -n namespace -o wide|grep service
kubectl get pod -n namespace podname -o yaml

 

apiVersion: v1
kind: Pod
metadata:
annotations:
artifact.spinnaker.io/location: jfm
artifact.spinnaker.io/name: jfm-qyweb
artifact.spinnaker.io/type: kubernetes/deployment
artifact.spinnaker.io/version: ""
moniker.spinnaker.io/application: jfm
moniker.spinnaker.io/cluster: deployment jfm-qyweb
creationTimestamp: "2022-12-14T09:19:39Z"
generateName: jfm-qyweb-77675d44d5-
labels:
app: jfm-qyweb
app.kubernetes.io/managed-by: spinnaker
app.kubernetes.io/name: jfm
pod-template-hash: 77675d44d5
managedFields:
- apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:metadata:
f:annotations:
.: {}
f:artifact.spinnaker.io/location: {}
f:artifact.spinnaker.io/name: {}
f:artifact.spinnaker.io/type: {}
f:artifact.spinnaker.io/version: {}
f:moniker.spinnaker.io/application: {}
f:moniker.spinnaker.io/cluster: {}
f:generateName: {}
f:labels:
.: {}
f:app: {}
f:app.kubernetes.io/managed-by: {}
f:app.kubernetes.io/name: {}
f:pod-template-hash: {}
f:ownerReferences:
.: {}
k:{"uid":"297f38ab-a04a-4a6a-85ed-ad420d7c5084"}: {}
f:spec:
f:containers:
k:{"name":"nginx"}:
.: {}
f:image: {}
f:imagePullPolicy: {}
f:name: {}
f:ports:
.: {}
k:{"containerPort":80,"protocol":"TCP"}:
.: {}
f:containerPort: {}
f:name: {}
f:protocol: {}
f:resources: {}
f:terminationMessagePath: {}
f:terminationMessagePolicy: {}
f:volumeMounts:
.: {}
k:{"mountPath":"/home/www/qingyun"}:
.: {}
f:mountPath: {}
f:name: {}
k:{"mountPath":"/home/www/qingyun/upload/"}:
.: {}
f:mountPath: {}
f:name: {}
f:subPath: {}
k:{"mountPath":"/var/log/nginx/"}:
.: {}
f:mountPath: {}
f:name: {}
f:subPath: {}
k:{"name":"php-fpm"}:
.: {}
f:image: {}
f:imagePullPolicy: {}
f:name: {}
f:ports:
.: {}
k:{"containerPort":9000,"protocol":"TCP"}:
.: {}
f:containerPort: {}
f:protocol: {}
f:resources: {}
f:terminationMessagePath: {}
f:terminationMessagePolicy: {}
f:volumeMounts:
.: {}
k:{"mountPath":"/home/www/qingyun"}:
.: {}
f:mountPath: {}
f:name: {}
f:dnsPolicy: {}
f:enableServiceLinks: {}
f:imagePullSecrets:
.: {}
k:{"name":"harbor1.r0wfppse.com"}: {}
f:initContainers:
.: {}
k:{"name":"code"}:
.: {}
f:command: {}
f:image: {}
f:imagePullPolicy: {}
f:name: {}
f:resources: {}
f:terminationMessagePath: {}
f:terminationMessagePolicy: {}
f:volumeMounts:
.: {}
k:{"mountPath":"/src-www/"}:
.: {}
f:mountPath: {}
f:name: {}
f:restartPolicy: {}
f:schedulerName: {}
f:securityContext: {}
f:terminationGracePeriodSeconds: {}
f:volumes:
.: {}
k:{"name":"persistent-vol"}:
.: {}
f:name: {}
f:persistentVolumeClaim:
.: {}
f:claimName: {}
k:{"name":"wwwroot"}:
.: {}
f:emptyDir: {}
f:name: {}
manager: kube-controller-manager
operation: Update
time: "2022-12-14T09:19:39Z"
- apiVersion: v1
fieldsType: FieldsV1
fieldsV1:
f:status:
f:conditions:
k:{"type":"ContainersReady"}:
.: {}
f:lastProbeTime: {}
f:lastTransitionTime: {}
f:message: {}
f:reason: {}
f:status: {}
f:type: {}
k:{"type":"Initialized"}:
.: {}
f:lastProbeTime: {}
f:lastTransitionTime: {}
f:status: {}
f:type: {}
k:{"type":"Ready"}:
.: {}
f:lastProbeTime: {}
f:lastTransitionTime: {}
f:message: {}
f:reason: {}
f:status: {}
f:type: {}
f:containerStatuses: {}
f:hostIP: {}
f:initContainerStatuses: {}
f:phase: {}
f:podIP: {}
f:podIPs:
.: {}
k:{"ip":"10.244.3.92"}:
.: {}
f:ip: {}
f:startTime: {}
manager: kubelet
operation: Update
subresource: status
time: "2022-12-14T09:19:42Z"
name: jfm-qyweb-77675d44d5-gmwcs
namespace: jfm
ownerReferences:
- apiVersion: apps/v1
blockOwnerDeletion: true
controller: true
kind: ReplicaSet
name: jfm-qyweb-77675d44d5
uid: 297f38ab-a04a-4a6a-85ed-ad420d7c5084
resourceVersion: "25916315"
uid: b2f5f0e2-2be0-439a-927d-2713594b5eea
spec:
containers:
- image: harbor1.R0WfPPse.com/jfmys/all/qingyun-web-nginx:develop-1.8.5.3-20221214153740
imagePullPolicy: Always
name: nginx
ports:
- containerPort: 80
name: nginx-port-80
protocol: TCP
resources: {}
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
volumeMounts:
- mountPath: /home/www/qingyun
name: wwwroot
- mountPath: /var/log/nginx/
name: persistent-vol
subPath: JFM/nginx/
- mountPath: /home/www/qingyun/upload/
name: persistent-vol
subPath: JFM/qingyun/upload/
- mountPath: /var/run/secrets/kubernetes.io/serviceaccount
name: kube-api-access-2lw9v
readOnly: true
- image: harbor1.R0WfPPse.com/jfmys/all/qingyun-web-runenv:develop-1.8.5.3-20221214154532
imagePullPolicy: Always
name: php-fpm
ports:
- containerPort: 9000
protocol: TCP
resources: {}
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
volumeMounts:
- mountPath: /home/www/qingyun
name: wwwroot
- mountPath: /var/run/secrets/kubernetes.io/serviceaccount
name: kube-api-access-2lw9v
readOnly: true
dnsPolicy: ClusterFirst
enableServiceLinks: true
imagePullSecrets:
- name: harbor1.r0wfppse.com
initContainers:
- command:
- sh
- -c
- cp -rf /code/* /src-www/ && chmod -R 777 /src-www/
image: harbor1.R0WfPPse.com/jfmys/all/qingyun-web-code:develop-1.8.5.3-20221214153751
imagePullPolicy: Always
name: code
resources: {}
terminationMessagePath: /dev/termination-log
terminationMessagePolicy: File
volumeMounts:
- mountPath: /src-www/
name: wwwroot
- mountPath: /var/run/secrets/kubernetes.io/serviceaccount
name: kube-api-access-2lw9v
readOnly: true
nodeName: k8s-uat-work1.148962587001
preemptionPolicy: PreemptLowerPriority
priority: 0
restartPolicy: Always
schedulerName: default-scheduler
securityContext: {}
serviceAccount: default
serviceAccountName: default
terminationGracePeriodSeconds: 30
tolerations:
- effect: NoExecute
key: node.kubernetes.io/not-ready
operator: Exists
tolerationSeconds: 300
- effect: NoExecute
key: node.kubernetes.io/unreachable
operator: Exists
tolerationSeconds: 300
volumes:
- emptyDir: {}
name: wwwroot
- name: persistent-vol
persistentVolumeClaim:
claimName: jfm-nfs-pvc
- name: kube-api-access-2lw9v
projected:
defaultMode: 420
sources:
- serviceAccountToken:
expirationSeconds: 3607
path: token
- configMap:
items:
- key: ca.crt
path: ca.crt
name: kube-root-ca.crt
- downwardAPI:
items:
- fieldRef:
apiVersion: v1
fieldPath: metadata.namespace
path: namespace
status:
conditions:
- lastProbeTime: null
lastTransitionTime: "2022-12-14T09:19:41Z"
status: "True"
type: Initialized
- lastProbeTime: null
lastTransitionTime: "2022-12-14T09:19:39Z"
message: 'containers with unready status: [php-fpm]'
reason: ContainersNotReady
status: "False"
type: Ready
- lastProbeTime: null
lastTransitionTime: "2022-12-14T09:19:39Z"
message: 'containers with unready status: [php-fpm]'
reason: ContainersNotReady
status: "False"
type: ContainersReady
- lastProbeTime: null
lastTransitionTime: "2022-12-14T09:19:39Z"
status: "True"
type: PodScheduled
containerStatuses:
- containerID: docker://130081879b6872f32f026461a2d519e8aaf865022604508ebcfffa2e35687e23
image: harbor1.R0WfPPse.com/jfmys/all/qingyun-web-nginx:develop-1.8.5.3-20221214153740
imageID: docker-pullable://harbor1.R0WfPPse.com/jfmys/all/qingyun-web-nginx@sha256:3b1d7fbc40730a95cdb859ec0b63d7f3bc3315fbf40412e73c0b613da792e425
lastState: {}
name: nginx
ready: true
restartCount: 0
started: true
state:
running:
startedAt: "2022-12-14T09:19:41Z"
- containerID: docker://4a78ac198a32d2f6c391da2957e13885bc8070e3041e01bc401cc066a7bb93fb
image: harbor1.R0WfPPse.com/jfmys/all/qingyun-web-runenv:develop-1.8.5.3-20221214154532
imageID: docker-pullable://harbor1.R0WfPPse.com/jfmys/all/qingyun-web-runenv@sha256:67ba76e6fa9280d758021e99cbfdabeda80ab86c05cd9248f0387b9eae06db07
lastState:
terminated:
containerID: docker://4a78ac198a32d2f6c391da2957e13885bc8070e3041e01bc401cc066a7bb93fb
exitCode: 127
finishedAt: "2022-12-14T09:22:39Z"
message: 'failed to create shim task: OCI runtime create failed: runc create
failed: unable to start container process: exec: "/docker-entrypoint.sh":
stat /docker-entrypoint.sh: no such file or directory: unknown'
reason: ContainerCannotRun
startedAt: "2022-12-14T09:22:39Z"
name: php-fpm
ready: false
restartCount: 5
started: false
state:
waiting:
message: back-off 2m40s restarting failed container=php-fpm pod=jfm-qyweb-77675d44d5-gmwcs_jfm(b2f5f0e2-2be0-439a-927d-2713594b5eea)
reason: CrashLoopBackOff
hostIP: 172.31.27.193
initContainerStatuses:
- containerID: docker://f75a55e5d6720b5f8e0c5f5a3bfbb977ef6136a7b33b617aa73ceb9048dcc9dd
image: harbor1.R0WfPPse.com/jfmys/all/qingyun-web-code:develop-1.8.5.3-20221214153751
imageID: docker-pullable://harbor1.R0WfPPse.com/jfmys/all/qingyun-web-code@sha256:5a25b6dfedf52e7b8304abeb2fb7fc3a9f9a51786e58f59a8ac82ef302a61db1
lastState: {}
name: code
ready: true
restartCount: 0
state:
terminated:
containerID: docker://f75a55e5d6720b5f8e0c5f5a3bfbb977ef6136a7b33b617aa73ceb9048dcc9dd
exitCode: 0
finishedAt: "2022-12-14T09:19:40Z"
reason: Completed
startedAt: "2022-12-14T09:19:40Z"
phase: Running
podIP: 10.244.3.92
podIPs:
- ip: 10.244.3.92
qosClass: BestEffort
startTime: "2022-12-14T09:19:39Z"

kubectl create -f pod1.yaml
kubectl get rc,service
kubectl describe node name
kubectl delete pod corxxxx
kubectl get pod nginx-deploy-7db697dfbd-2qh7v -o yaml
kubectl get svc -n ingress-nginx
kubectl describe pod/ingress-nginx-controller-mngr9 -n ingress-nginx
kubectl get pods,svc -n ingress-nginx -o wide
kubectl exec -it pod/ingress-nginx-controller-8bwxb bash -n ingress-nginx
kubectl get pods ingress-nginx-controller-xn85x -n ingress-nginx -o yaml

 

1.查看coredns的pod 处于 imagePullBackoff 状态 

 

2.查询pod描述状态 kubectl describe pod coredns-7b884d5cb7-tbltv -n kube-system，可以指定镜像没有git pull 导致的问题

 

3. 查询pod的负载在哪些node节点上 然后节点应该没有core的镜像

 

 

 4.可以利用docker仓库的coredns 拉取 ctr -n k8s.io i pull docker.io/coredns/coredns:1.9.3，然后利用tag 去改名 ctr -n k8s.io i tag docker.io/coredns/coredns:1.9.3 registry.aliyuncs.com/k8sxio/coredns:v1.9.3

5.最后到2个node节点去拉取镜像 pod运行正常

 

6. 查看pod日志kebelet 处于 un 9 22:15:56 master kubelet: E0609 22:15:56.367821 12257 node_container_manager_linux.go:61] “Failed to create cgroup” 状态,分析可能跟SystemdCgroup 有关系

 7.结果是是查看正常，并非这个问题，处理是system版本过低，yum -y remote system,然后进行yum install system 去安装最新的，然后看kubelte 启动正常