kubernetes如何在没有stdout或stderr的情况下收集日志文件 [英] kubernetes how to collect log file without stdout or stderr

问题描述

我的Pod有多个日志文件，例如php-fpm + nginx堆栈.如何收集日志文件?

My pod have more than one log file, such as php-fpm + nginx stack. How to collect the log files?

我知道nginx使用symlink来做到这一点.但这不能处理两个以上的日志文件.

I know nginx doing it with symlink. But this cannot deal with more than 2 log files.

我想将主机中的卷装载到Pod，但是如何为每个Pod设置不同的文件夹?无论如何，是否可以将主机中由podname命名的文件夹安装到pod文件夹/logs.

I want to mount volume in host to pods, but how to set different folder for every pod? Is there anyway to mount a folder named by podname in the host to pod folder /logs.

raychaser 提供了一种将文件夹收集到/var/log/containers/的方法，但我没有认为它可以在kubernetes中使用.

raychaser gave a way to collect folders to /var/log/containers/, but I don't think it works in kubernetes.

推荐答案

最后，我找到了一种收集日志的方法.

Finally, I find a way to collect the logs.

1. 确保所有应用将所有日志文件都写入一个文件夹，例如 /med/log.
2. 确保所有应用都使用脚本启动工作，例如 entrypoint.sh.
3. 在安装卷中创建一个名为$ HOSTNAME的文件夹，例如 /log/$HOSTNAME
4. 链接文件夹:ln -sf /log/$HOSTNAME /med/log.

1. Make sure all apps write all log files to a folder, e.g. /med/log.
2. Make sure all apps start the job with a script, e.g. entrypoint.sh.
3. Create a folder named by $HOSTNAME in mount volume, e.g. /log/$HOSTNAME
4. Link the folder: ln -sf /log/$HOSTNAME /med/log.

在k8s中，您需要将主机日志文件夹/var/log/k8s/挂载到/log.日志目录如下所示:

In k8s, you need to mount the host log folder /var/log/k8s/ to /log. And the log dir looks like:

/var/log/k8s/
|-- app1-${container_id}/
|   |-- access.log
|   |-- error.log
|-- app2-${container_id}/
    |-- access.log
    |-- error.log

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