05-18-2011
Opinion on auto-restart of failed apps/services
I'm becoming a dying breed where I work. More and more sys admins are advocating automatically restarting failed services such as tomcat, jboss, etc. I've always been against doing this except with buggy apps that can't be fixed or avoided.
My main argument is that I feel it's a trick used by lazy sys admins who don't want to troubleshoot their apps. Almost everything we have that is customer facing is behind a load balancer (we have a lot of customers). If the LB is properly configured, it will pull a node out of the rotation if it fails a health check. If the pool is sized properly it will have at least n+1 servers running and should be able to handle the load if one node dies or is removed. I feel we should let the app fail, alert on it, remove it from the pool, and troubleshoot it to find out why. Turn up a new node to take it's place if necessary. If the bad app is auto restarted and it is indeed bad, we will continue to route customers to it and it could negatively affect them.
They argue that "apps just fail" and that we should restart them asap to keep them up and servicing customers.
I'm starting to feel like the old geezer of the group and these damn kids won't get off my lawn. If you wouldn't mind, please let me know your take on this. I'm not looking for everyone to agree with me and I'm not against changing my views. They just haven't provided a good argument.
Thanks,
MG
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LEARN ABOUT REDHAT
redhat-config-services
serviceconf(8) System Manager's Manual serviceconf(8)
NAME
redhat-config-services - Service Configuration Utility
SYNTAX
redhat-config-services
DESCRIPTION
This is a graphical tool for enabling and disabling services (including xinetd services). Functionality to start, stop, and restart ser-
vices is also included.
OPTIONS
None
FILES
/usr/bin/redhat-config-services
/usr/share/serviceconf/*
EXAMPLES
To run this program simply type:
redhat-config-services
LIMITATIONS
This utility currently execs chkconfig --add/--del <servicename> when enabling and disabling services. This means that it does not have the
same default behaviour as ntsysv.
SEE ALSO
chkconfig(8) ntsysv(8)
BUGS
- Some services will not start or stop properly if started anywhere but the console (redhat-config-services will appear to hang in these
instances). This is not a bug in redhat-config-services, but in the individual services.
- Some services are incredibly hard to detect if they are running or not. Starting, stopping and restarting initscripts may give mixed
results (ie. may fail if you are stopping a service that's already stopped, etc). This will be fixed; until then it's a bug.
AUTHORS
Tim Powers <timp@redhat.com>
Bill Nottingham <notting@redhat.com>
Dan Walsh <dwalsh@redhat.com>
Wed May 16 2001 serviceconf(8)