help request: [file-logger] duplicate log, new log file contains history log message

[kizy008]

Description

In my project, I need split log file by hour and delete logs 7 days ago. So I write a rotate plugin like [log-rotate.lua], and it works. But I found that every new log file contains the history log message. For example, [log-2022-09-01_01-00-00.log] contains all message in [log-2022-09-01_00-00-00.log]]. So every log contains all history message. I think the new log should contains message in its hour period. But I got all history message. I want to know how to get incremental logs in new log file.

我的项目中需要将日志按照小时分割并自动淘汰7天前的历史日志。 所以我仿照[log-rotate.lua]写了file-logger的滚动切割日志插件，并且按照预期生效了。但是我发现，所有的心日志文件都包含了全量的历史日志。比如 [log-2022-09-01_01-00-00.log]日志不仅包含了23点到0点的日志， 还包含了所有的历史全量日志。我本以为新日志应该只包含过去1个小时之内的日志。 我想知道如何利用file-logger在每个日志文件中保存这个小时时间段内增量的日志呢？

Environment

• APISIX version (run apisix version):
• Operating system (run uname -a):
• OpenResty / Nginx version (run openresty -V or nginx -V):
• etcd version, if relevant (run curl http://127.0.0.1:9090/v1/server_info):
• APISIX Dashboard version, if relevant:
• Plugin runner version, for issues related to plugin runners:
• LuaRocks version, for installation issues (run luarocks --version):

[AlphaChen]

i meet same problem。can u show u code？

[monkeyDluffy6017]

1. rename old log file and create new one
2. notify other processes to reopen the file

Do you follow the two steps ?

[AlphaChen]

1. rename old log file and create new one
2. notify other processes to reopen the file

Do you follow the two steps ?

how to notify other processes

[monkeyDluffy6017]

You could use ngx.shared.dict to notify other processes. For example

-- process 1
local rotate = ngx.shared.rotate
rotate:set("reopen", true)

-- process 2
local rotate = ngx.shared.rotate
local reopen = rotate:get("reopen")
if reopen then
    -- reopen file
end

[tzssangglass]

Since this is your own code, not related to the project, I turned it into discussion.