[WIP] configure loglevel for salt and python

[mcalmer]

Warning

In most cases, it is not enough if you modify the terraform modules at modules/libvirt. Check if you also need changes at modules/openstack and modules/aws.

What does this PR change?

Configure logging and loglevel via main.tf .

As of now for salt and python backend.

[mcalmer]

Still need a good idea how to configure log4j.properties for tomcat and taskomatic

[moio]

I think best would be to allow for a new parameter which is a map from log level to class or package names. It can be passed as-is via grains, then salt should pick it up and calculate lines to add to log4j.conf.

Example:

java_logging = {
 "DEBUG" : ["com.suse.manager.tasks, com.suse.manager.reactor.PGEventListener"],
 "INFO" : ["com.redhat.rhn.frontend.action.LoginAction"],
}

Should result in:

log4j.logger.com.redhat.rhn.frontend.action.LoginAction=INFO
log4j.logger.com.suse.manager.tasks=DEBUG
log4j.logger.com.suse.manager.reactor.PGEventListener=DEBUG 

(log4j.logger. is prepended and =LEVEL is appended)

Note that the log4.conf file should be extracted from rhn.jar (by default it does not exist) and then new lines should be added. The result should be copied in /srv/tomcat/webapps/rhn/WEB-INF/classes/log4j.properties (for Tomcat), /usr/share/rhn/classes/log4j.properties (for Taskomatic) and usr/share/rhn/search/classes/log4j.properties (for Search). Parent directories might be missing.

Any plans to finish this PR? :-)