ctdb/config/events.d/41.httpd

   1 #!/bin/sh
   2 # event script to manage httpd in a cluster environment
   3
   4 [ -n "$CTDB_BASE" ] || \
   5     export CTDB_BASE=$(cd -P $(dirname "$0") ; dirname "$PWD")
   6
   7 . $CTDB_BASE/functions
   8
   9 detect_init_style
  10
  11 case $CTDB_INIT_STYLE in
  12     redhat)
  13         service_name="httpd"
  14         service_config="http"
  15         ;;
  16     suse|debian|*)
  17         service_name="apache2"
  18         service_config="apache2"
  19         ;;
  20 esac
  21
  22 # RHEL5 sometimes use a SIGKILL to terminate httpd, which then leaks
  23 # semaphores.  This is a hack to clean them up.
  24 cleanup_httpd_semaphore_leak() {
  25     killall -q -0 "$service_name" ||
  26     for i in $(ipcs -s | awk '$3 == "apache" { print $2 }') ; do
  27         ipcrm -s $i
  28     done
  29 }
  30
  31 ##########
  32
  33 service_start ()
  34 {
  35     cleanup_httpd_semaphore_leak
  36     service $service_name start
  37 }
  38 service_stop ()
  39 {
  40     service $service_name stop
  41     killall -q -9 $service_name || true
  42 }
  43
  44 loadconfig
  45
  46 ctdb_start_stop_service
  47
  48 is_ctdb_managed_service || exit 0
  49
  50 case "$1" in
  51     startup)
  52         ctdb_service_start
  53         ;;
  54
  55     shutdown)
  56         ctdb_service_stop
  57         ;;
  58
  59     monitor)
  60         if ctdb_check_tcp_ports 80 >/dev/null 2>/dev/null ; then
  61             ctdb_counter_init
  62         else
  63             ctdb_counter_incr
  64
  65             ctdb_check_counter warn -eq 2 || {
  66                 echo "HTTPD is not running. Trying to restart HTTPD."
  67                 service_stop
  68                 service_start
  69                 exit 0
  70             }
  71             ctdb_check_counter warn -ge 5 || {
  72                 echo "HTTPD is not running. Trying to restart HTTPD."
  73                 service_stop
  74                 service_start
  75                 exit 1
  76             }
  77         fi
  78         ;;
  79
  80     *)
  81         ctdb_standard_event_handler "$@"
  82         ;;
  83 esac
  84
  85 exit 0
  86