ctdb/config/events.d/20.multipathd

   1 #!/bin/sh
   2 # ctdb event script for monitoring the multipath daemon
   3 #
   4 # Configure monitporing of multipath devices by listing the device serials
   5 # in /etc/ctdb/multipathd :
   6 #   CTDB_MONITOR_MPDEVICES="device1 device2 ..."
   7 #
   8
   9 PATH=/bin:/usr/bin:$PATH
  10
  11 . $CTDB_BASE/functions
  12 loadconfig ctdb
  13 loadconfig multipathd
  14
  15 cmd="$1"
  16 shift
  17
  18 [ -z "$CTDB_MONITOR_MPDEVICES" ] && {
  19         exit 0
  20 }
  21
  22 MPFAILURE=$CTDB_BASE/state/multipathd/failure
  23
  24 multipathd_check_background()
  25 {
  26         for DEVICE in $CTDB_MONITOR_MPDEVICES; do
  27                 # check that we can see all devices
  28                 if [ -z "`multipath -ll $DEVICE`" ]; then
  29                         echo Device $DEVICE not known to multipathd
  30                         exit 1
  31                 fi
  32
  33                 # check that all devices are active
  34                 if [ -z "`multipath -ll $DEVICE|grep prio|grep active`" ]; then
  35                         echo Device $DEVICE has no active paths
  36                         exit 1
  37                 fi
  38         done
  39         exit 0
  40 }
  41
  42 multipathd_check()
  43 {
  44         # run the actual check in the background since the call to
  45         # multipath may block.
  46         (
  47         multipathd_check_background &
  48         pid="$!"
  49         timeleft=10
  50
  51         while [ $timeleft -gt 0 ]; do
  52                 timeleft=$(($timeleft - 1))
  53
  54                 # see if the process still exists
  55                 /bin/kill -0 $pid > /dev/null 2>&1 || {
  56                         # it doesn't exist, grab its exit status
  57                         wait $pid
  58                         [ $? = 0 ] || {
  59                                 echo "20.multipathd: multipath background update exited with status $?"
  60                                 touch $MPFAILURE
  61                                 exit 1
  62                         }
  63                         rm $MPFAILURE 2>/dev/null
  64                         exit 0
  65                 }
  66                 sleep 1
  67         done
  68         echo "20.multipathd: Callout to multipath checks hung."
  69         touch $MPFAILURE
  70         exit 1
  71         ) &
  72
  73         if [ -f $MPFAILURE ]; then
  74                 return 1
  75         else
  76                 return 0
  77         fi
  78 }
  79
  80 case $cmd in
  81      startup)
  82         # create a state directory to keep/track the multipath device
  83         # state
  84         /bin/mkdir -p $CTDB_BASE/state/multipathd
  85         exit 0
  86         ;;
  87
  88      monitor)
  89         multipathd_check
  90         [ "$?" = "0" ] || {
  91                 echo 20.multipathd: monitoring of multipathing failed
  92                 exit 1
  93         }
  94         exit 0
  95         ;;
  96 esac
  97
  98 # ignore unknown commands
  99 exit 0