setup-hub-loose-ends

#!/bin/sh
echo "============================"
echo "=== setup-hub-loose-ends ==="
echo "============================"

. `pwd`/defaults

# Check that all the externally defined variables we use in this script are initailized
echo -n "Checking the defaults of the following: "
for i in HOSTNAME HTTPDCONF; do
	if [ \$$i ]; then
		echo -n "$i "
		eval n=\$$i
		if [ ! $n ]; then
			echo
			echo "conf error: $i is NOT defined/set in the defaults file. exiting."
			exit 1
		fi
	fi
done
echo " (OK)"

# Find the max number of cpu cores
CPUS=`grep -c processor /proc/cpuinfo`
# HT normally means we have 2 threads per cpu core
LOAD=$((CPUS * 2))

# The apache web server has two places that it sets maximum requests a server
# will handle before the server restarts. The xmlrpc interface in kojihub is
# a python application, and mod_python can sometimes grow outrageously large
# when it doesn't reap memory often enough. As a result, if you let apache
# handle infinite requests without respawning a new server, you can take a
# box down under heavy load. It's therefore strongly suggested that you set
# both instances of MaxRequestsPerChild in httpd.conf to something reasonable
# (at 100 the httpd processes will grow to about 75MB resident set size 
# before respawning). 
FIXUPHTTPD=0

if [ $FIXUPHTTPD == "1" ]; then
	perl -p -i -e "s/((^.*)MaxRequestsPerChild (.*$))/MaxRequestsPerChild	100/" $HTTPDCONF
fi

# We need the web server up and running at this point
service httpd restart


# Add the host entry for the koji builder to the database (us)
# Special note: the order of the archs indicates which arch will be used for
# noarch building ie in this case the first mentioned arch (x86_64) will be
# used for noarch builds however thers no guarentee that this will be the case
# in later sw releases of koji
koji add-host $HOSTNAME x86_64 i386

# Add the host to the createrepo channel 
koji add-host-to-channel $HOSTNAME createrepo

# A note on capacity
# The default capacity of a host added to the host database is 2. This means
# that once the load average on that machine exceeds 2, kojid will not accept
# any additional tasks. This is separate from the maxjobs item in the
# configuration file. Before kojid will accept a job, it must pass both the
# test to ensure the load average is below capacity and that the current
# number of jobs it is already processing is less than maxjobs. However, in
# today's modern age of quad core and higher CPUs, a load average of 2 is
# generally insufficient to fully utilize hardware. As there is not an option
# to set the capacity of the host via the command line tools, it must be done
# manually in psql. 

echo "Updating the capacity of $HOSTNAME to handle a loadavg of $LOAD"
su -l koji -c "psql koji --command \"update host set capacity = $LOAD where name = '$HOSTNAME';\""

# Start Kojid
service kojid start

# Check for busted mock
VER=`rpm -q --queryformat "%{NAME}-%{VERSION}\n" mock`
for i in 1.1.3 1.1.4; do
	eval n=\$$i
	if [ $VER == $n ]; then
		echo "busted mock found, changing value of cache_topdir in /etc/mock/site-defaults"
		perl -p -i -e "s/# config_opts['cache_topdir'] = '/var/cache/mock'/# config_opts['cache_topdir'] = '/var/lib/mock'/g" /etc/mock/site-defaults
	fi
done