花很长时间使用python执行saltstack命令 [英] Taking a long time to execute a saltstack command using python

问题描述

我正在尝试执行此saltstack命令 cmd = "/usr/local/bin/salt -L 'target' cp.get_dir salt://allapps/V001 /u02/tomcat-8.0.24/8080/webapps/" output = os.popen(cmd).readlines()使用python. 我已经并行启动了8个线程来运行此命令，但是每个线程花费大约5分钟来完成. 但是我是在终端机或python控制台中独立运行此命令的，大约需要2-3秒才能完成. 首先，我认为这是因为readlines()占用大量内存，但是当我删除readlines()只是为了使用os.popen()运行shell命令时，它仍然要花费5分钟的时间才能完成. 我不知道为什么要花这么多时间来运行此命令，对此有什么解决方案?谢谢你们

I was trying to execute this saltstack command cmd = "/usr/local/bin/salt -L 'target' cp.get_dir salt://allapps/V001 /u02/tomcat-8.0.24/8080/webapps/" output = os.popen(cmd).readlines() using python. I have started 8 threads in parallel to run this command, but each thread costs about 5 min to finish. But I run this command in terminal or python console standalone, it just takes me about 2-3 secs to complete. First I thought it was because of readlines() consuming lots of memory, but it still costs 5 min more to finish when I removed readlines() just to run the shell command with os.popen(). I have no idea why it takes so much time to run this command, any solutions to this? Thx guys

我发现执行output = os.popen("/usr/local/bin/salt -L 'target' cp.get_dir salt://allapps/V001 /u02/tomcat-8.0.24/8080/webapps/")而不是output = os.popen(cmd)花费了大约5秒钟的时间. 变量cmd与"/usr/local/bin/salt -L 'target' cp.get_dir salt://allapps/V001 /u02/tomcat-8.0.24/8080/webapps/"完全相同. 为什么会有如此大的差异?

I have found that it consumes around 5 sec to execute output = os.popen("/usr/local/bin/salt -L 'target' cp.get_dir salt://allapps/V001 /u02/tomcat-8.0.24/8080/webapps/") other than output = os.popen(cmd). The variable cmd is exactly the same with "/usr/local/bin/salt -L 'target' cp.get_dir salt://allapps/V001 /u02/tomcat-8.0.24/8080/webapps/". Why there is so much difference?

推荐答案

我不确定为什么该命令要花这么长时间.您是否考虑过使用Salt的python API? https://docs.saltstack.com/en/latest /ref/clients/index.html#python-api

I'm not sure why that command is taking so long. Have you considered using Salt's python api? https://docs.saltstack.com/en/latest/ref/clients/index.html#python-api

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