sin/samba-mirror
1
0
Fork 0
mirror of https://github.com/samba-team/samba.git synced 2025-02-05 21:57:51 +03:00
Code

41.httpd event script workaround for RHEL5-ism.

Browse Source 
RHEL5 can SIGKILL httpd when stopping it, causing it to leak
semaphores.  This means that eventually a node runs out of semaphores
and httpd can't be started.  So, before we attempt to start httpd we
clean up any semaphores owned by apache.  We also try to restart httpd
in the monitor event if httpd has gone away.

Signed-off-by: Martin Schwenke <martin@meltin.net>

(This used to be ctdb commit 2d3fbbbb63f443686f9fec42c0bc2058d115806e)
This commit is contained in:
Martin Schwenke 2009-05-11 14:50:28 +10:00 committed by Ronnie Sahlberg
parent 54a5e6c0c8
commit 86ad711c37
1 changed files with 26 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
ctdb/config/events.d/41.httpd
View File

@ -34,19 +34,35 @@ loadconfig "${CTDB_CONFIG_HTTP}"
cmd="$1"
shift
case $cmd in
startup)
service "${CTDB_SERVICE_HTTP}" stop > /dev/null 2>&1
service "${CTDB_SERVICE_HTTP}" start
;;
# RHEL5 sometimes use a SIGKILL to terminate httpd, which then leaks
# semaphores. This is a hack to clean them up.
cleanup_httpd_semaphore_leak() {
killall -q -0 "${CTDB_SERVICE_HTTP}" ||
for i in $(ipcs -s | awk '$3 == "apache" { print $2 }') ; do
ipcrm -s $i
done
}
shutdown)
service "${CTDB_SERVICE_HTTP}" stop
;;
case $cmd in
startup)
cleanup_httpd_semaphore_leak
service "${CTDB_SERVICE_HTTP}" start
;;
shutdown)
service "${CTDB_SERVICE_HTTP}" stop
killall -q -9 "${CTDB_SERVICE_HTTP}"
;;
monitor)
ctdb_check_tcp_ports "http" 80
;;
( ctdb_check_tcp_ports "http" 80 )
if [ $? -ne 0 ] ; then
echo "HTTPD is not running. Trying to restart HTTPD."
cleanup_httpd_semaphore_leak
service "${CTDB_SERVICE_HTTP}" start
exit 1
fi
;;
esac
exit 0