CoolMind

If you cannot measure it, you cannot improve it.

How tornado starts?

项目中的服务使用 tornado 来搭建，但是对于 tornado 如何启动还没有仔细研究过。在某次问题排查时，仔细研究了 tornado 是如何启动的。测试刨根问底最终代码 get_event_loop stop 总...

Posted by chunyang on May 9, 2022

Kubernetes python package

在项目中使用比较多的 kubernetes。主要使用相应的 python kubernetes 库包来进行各种部署的管理。国内很多讲解 kubernetes 原理，但是对于这个库各种使用看起来比较少。 Initialization Deployments 重启...

Posted by chunyang on May 7, 2022

iptables in linux

An email sent from bwg told me that my service had been banned due to a DDoS attack. My response is to change all the related passwords of the con...

Posted by chunyang on May 6, 2022

logger.debug causes performance issues

A logger is preferred in a formal project, because we can set different levels for different loggers, redirect log messages to files (even to remot...

Posted by chunyang on April 24, 2022

Python itertools

最近在工作中使用 python 开发时经常需要将多个 iterator 进行一些操作。以前的惯用手法要么是主动使用 for 循环，要么是使用 zip 将多个 iterator 打平成多个。其实一直知道 itertools 这个库的，只是偶尔会用，并没有去仔细研究过。合并多个文件 ...

Posted by chunyang on April 21, 2022

Python tempfile module

在开发的过程中，我们时常需要创建一些临时目录或者临时文件来保存一些状态。在 python 中一般会使用 tempfile 这个模块。之前其实一直都是利用它的 gettempdir 来获取一个临时目录，然后在临时目录中创建文件，最后在清理掉。实际上 tempfile 可以更加的智能。 ...

Posted by chunyang on April 14, 2022

tmux conf

TMux is really awesome when you want to run commands on servers. But due to all kinds of reasons, you may lose the connection. If you reconnect to ...

Posted by chunyang on April 11, 2022

Buffer only in vim

I am using coc-pywright to jump to the definition for programming in python. I have set it up to open a vertically split window. Sometimes I just w...

Posted by chunyang on March 22, 2022