以前在centos7上執行logrotate 沒發現什麼問題，大概因為都用系統預設的log檔位置及內容
這次改用docker，log檔是另外移動出來到自訂volume folder
就遇到selinux權限問題了
所以要設定二個指令
semanage fcontext -a -t var_log_t /your/custom/log/folder/path
restorecon -v /your/custom/log/folder/path
以上
參考：https://serverfault.com/questions/491703/logrotate-cron-job-not-rotating-certain-logs/510676#510676
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