Dealing with too many open files

In this recipe, you will learn how to resolve a situation where the number of open files exceeds the maximum file limit set in the operating system.

How to do it...

1. On trying to add a new minion to the master, the following error may be noticed in the log:

   [salt.master    ][INFO    ] Starting Salt worker process 38
   Too many open files
   sock != -1 (tcp_listener.cpp:335)
   

2. Check the limit of maximum open files in the system:

   [root@salt-master ~]# ulimit -n
   1024
   

3. Run the salt-master daemon in debug mode:

   [root@salt-master ~]# salt-master -l debug
   .
   .
   [INFO    ] salt-master is starting as user 'root'
   [INFO    ] Current values for max open files soft/hard setting: 1024/4096
   [INFO    ] The value for the 'max_open_files' setting, 100000, is higher than what the user running salt is allowed to raise to, 4096. Defaulting to 4096.
   [INFO    ] Raising max open files value to 4096
   [INFO    ] New values for max open files soft/hard values: 4096/4096
   

4. Edit the...