ctdb/config/events.d/41.httpd

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