crontab无法执行kubectl命令

问题：自己写了个kubectl命令删除失败pods的脚本，然后crontab自动执行总是失败。
分析：
[root@k8s-master-1 lyf]# which kubectl
/usr/local/bin/kubectl

[root@k8s-master-1 lyf]# cat /etc/crontab
SHELL=/bin/bash
PATH=/sbin:/bin:/usr/sbin:/usr/bin
MAILTO=root

[root@k8s-master-1 lyf]# echo $PATH
/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin
可以发现cron的环境变量少了/usr/local/bin /usr/local/sbin/ 以及/root/bin
解决：
在脚本里加入一行
export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin
即可
#!/usr/bin/bash
export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin
#for i in `kubectl get pods -n km145   | grep manage-deploy | awk '{print $1}'`;do kubectl delete pods $i -n km145 --force ;done
for i in `kubectl get pods -n pre   | grep manage-deploy | awk '{print $1}'`;do kubectl delete pods $i -n pre;done
#for i in `kubectl get pods -n vip   | grep manage-deploy | awk '{print $1}'`;do kubectl delete pods $i -n vip --force ;done