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new section on open file limits

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Matthew Nicholson 2012-03-01 13:23:48 -05:00
parent 7e4d2bcbbf
commit 2539e1e735
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doc/topics/troubleshooting/index.rst
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@ -30,4 +30,25 @@ When developing the state tree it is geenrally recommended to invoke
state.highstate with salt-call, this displays a great deal more information
about the highstate execution then if it is called remotely.
Too many open files
===================
The salt-master needs at least 2 sockets per host that connects to it, one for
the Publisher and one for response port. Thus, large installations may upon
scaling up the number of minions accessing a given master, encounter:
12:45:29,289 [salt.master ][INFO ] Starting Salt worker process 38
Too many open files
sock != -1 (tcp_listener.cpp:335)
The solution to this would be to check the number of files allowed to be
opened by the user running salt-master (root by default):
[root@salt-master ~]# ulimit -n
1024
And modify that value to be at least equal to the number of minions x 2.
This setting can be changed in limits.conf as the nofile value(s),
and activated upon new a login of the specified user.
So, an environment with 1800 minions, would need 1800 x 2 = 3600 as a minimum