K8S学习笔记之sed awk使用print printf构建多个参数执行指令配合kubectl操作pod

/**

echo abc def | awk '{printf("111 %s 222 %s", $1, $2)}'
111 abc 222 def

*/

/**

echo abc def | awk '{print("111", $2, "222", $2)}'
111 def 222 def

*/

/**

获取所有内存大于2GB的pod

kubectl top pod --all-namesapces | sed 's/Mi//g' | awk '{if (NR>1){print $1","$2","$4}}' | sort | awk -F, '$3>2048{print $1","$2","$3}' | awk -F, '{print("kubectl get pod ", $2, " -n ", $1)}' | /bin/bash

*/

获取所有内存大于2GB的pod，将结果写入到/var/log/deleteAbove2GbPods.log，并逐一删除这些pod

/**

for i in `kubectl top pod --all-namesapces | sed 's/Mi//g' | awk '{if (NR>1){print $1","$2","$4}}' | sort | awk -F, '$3>2048{print $1","$2","$3}'`;

do echo $i >> /var/log/deleteAbove2GbPods.log
   echo $i | awk -F, '{print("kubectl delete pod ", $2, " -n ",$1)}' | /bin/bash;

done 

*/

/**

kubectl delete pod podName -n NAMESPACE --force --grace-period=0

*/