k8s常用命令-木东 blog

k8s强制删除pvc

kubectl patch pvc pvc-ea-trained-model-data -p '{"metadata":{"finalizers":null}}' -nto

批量删除被驱逐的pod

kubectl get pods -nops| grep Evicted | awk '{print $1}' | xargs kubectl delete pod -nops

pod重启

无yaml文件重启

kubectl get pod {podname} -n {namespace} -o yaml | kubectl replace --force -f -

有yaml文件重启

kubectl replace --force -f xxx.yaml

查看dashboard token

kubectl -n kube-system describe $(kubectl -n kube-system get secret -n kube-system -o name | grep namespace) | grep token

创建镜像仓库秘钥

kubectl create secret docker-registry default-secret --docker-server=se-ds-registry.cn-hangzhou.cr.aliyuncs.com --docker-username=ikkyu@1166866785040302 --docker-password=V8aMgQY3cv -necox

k3s coredns配置

k3s重启会使用默认coredns.yaml

污点操作

查看污点

kubectl describe node i-xrpr2qvd |grep Taints

Taints:             node-role.kubernetes.io/master:NoSchedule

删除污点，污点名后面加减号-

kubectl taint node i-xrpr2qvd node-role.kubernetes.io/master-

节点标签

添加label语法

kubectl label nodes <node-name> <label-key>=<label-value>

kubectl label node 192.168.1.205 mem=large

查看现有node及label
通过--show-labels 选项将节点的标签显示出来

kubectl get node --show-labels

给节点删除标签的命令，删除label语法

kubectl label nodes <node-name> <label-key>-

上面命令中的mem-中的mem为标签的键，后面的减号表示将该标签删除

kubectl label node 192.168.1.205 mem-

查看pod和service网段

pod网段

kubectl get cm kubeadm-config -n kube-system -o yaml | grep -i podsub

kubectl容器外执行命令

sqlserver

sqlserver容器外导入数据库

kubectl exec -it mssql-0 -- bash -c "/opt/mssql-tools/bin/sqlcmd -S localhost -U sa -P 'P@ssw1rd' < /tmp/00.mssql_exec.sql"

sqlserver容器外查询数据库并过滤

kubectl exec -it mssql-0 -- bash -c "/opt/mssql-tools/bin/sqlcmd -S localhost -U sa -P 'P@ssw1rd' -Q 'SELECT Name from sys.Databases'"| grep -v master |grep -v model | grep -v tempdb | grep -v msdb | grep -v Name | grep -v ^- | grep -v ^$ | grep -v '^('

sqlserver容器外删除数据库

kubectl exec -it mssql-0 -- bash -c "/opt/mssql-tools/bin/sqlcmd -S localhost -U sa -P 'P@ssw1rd' -Q 'drop database k3senergymost'"

mysql

mysqlPod=`kubectl get pod -n sre | grep mysql | awk '{print $1}'`

# 拷贝文件到容器中
kubectl cp inital-data/config_2022_08_30.sql -n sre $mysqlPod:/tmp
kubectl cp inital-data/portal_2022_07_19.sql -n sre $mysqlPod:/tmp

# 创建库
kubectl exec $mysqlPod -n sre -- bash -c 'mysqladmin -uroot -pP@ssw1rd create config'
kubectl exec $mysqlPod -n sre -- bash -c 'mysqladmin -uroot -pP@ssw1rd create portal'

# 执行导入脚本
kubectl exec $mysqlPod -n sre -- bash -c 'mysql -uroot -pP@ssw1rd config < /tmp/config_2022_08_30.sql'
kubectl exec $mysqlPod -n sre -- bash -c 'mysql -uroot -pP@ssw1rd portal < /tmp/portal_2022_07_19.sql'

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k8s常用命令