问题
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
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?
回答1:
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
来源：https://stackoverflow.com/questions/33405520/taking-a-long-time-to-execute-a-saltstack-command-using-python