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#!/bin/sh
#
#
# License: GNU General Public License (GPL)
# Support: linux-ha@lists.linux-ha.org
#
# Raid1
# Description: Manages a Linux software RAID device on a shared storage medium.
# Original Author: Eric Z. Ayers (eric.ayers@compgen.com)
# Original Release: 25 Oct 2000
# RAID patches: http://people.redhat.com/mingo/raid-patches/
# Word to the Wise: http://lwn.net/2000/0810/a/raid-faq.php3
# Sympathetic Ear: mailto:linux-raid@vger.kernel.org
#
# usage: $0 {start|stop|status|monitor|validate-all|usage|meta-data}
#
#
# EXAMPLE config file /etc/raidtab.md0
# This file must exist on both machines!
#
# raiddev /dev/md0
# raid-level 1
# nr-raid-disks 2
# chunk-size 64k
# persistent-superblock 1
# #nr-spare-disks 0
# device /dev/sda1
# raid-disk 0
# device /dev/sdb1
# raid-disk 1
#
# EXAMPLE config file /etc/mdadm.conf (for more info:man mdadm.conf)
#
# DEVICE /dev/sdb1 /dev/sdc1
# ARRAY /dev/md0 UUID=4a865b55:ba27ef8d:29cd5701:6fb42799
#######################################################################
# Initialization:
: ${OCF_FUNCTIONS_DIR=${OCF_ROOT}/lib/heartbeat}
. ${OCF_FUNCTIONS_DIR}/ocf-shellfuncs
#######################################################################
usage() {
cat <<-EOT
usage: $0 {start|stop|status|monitor|validate-all|usage|meta-data}
EOT
}
meta_data() {
cat <<END
<?xml version="1.0"?>
<!DOCTYPE resource-agent SYSTEM "ra-api-1.dtd">
<resource-agent name="Raid1">
<version>1.0</version>
<longdesc lang="en">
This resource agent manages Linux software RAID (MD) devices on
a shared storage medium. It uses mdadm(8) to start, stop, and
monitor the MD devices. Raidtools are supported, but deprecated.
See https://raid.wiki.kernel.org/index.php/Linux_Raid for more
information.
</longdesc>
<shortdesc lang="en">Manages Linux software RAID (MD) devices on shared storage</shortdesc>
<parameters>
<parameter name="raidconf" unique="0" required="1">
<longdesc lang="en">
The RAID configuration file, e.g. /etc/mdadm.conf.
</longdesc>
<shortdesc lang="en">RAID config file</shortdesc>
<content type="string" default="" />
</parameter>
<parameter name="raiddev" unique="0" required="1">
<longdesc lang="en">
One or more block devices to use, space separated. Alternatively,
set to "auto" to manage all devices specified in raidconf.
</longdesc>
<shortdesc lang="en">block device</shortdesc>
<content type="string" default="" />
</parameter>
<parameter name="homehost" unique="0" required="0">
<longdesc lang="en">
The value for the homehost directive; this is an mdadm feature to
protect RAIDs against being activated by accident. It is recommended to
create RAIDs managed by the cluster with "homehost" set to a special
value, so they are not accidentially auto-assembled by nodes not
supposed to own them.
</longdesc>
<shortdesc lang="en">Homehost for mdadm</shortdesc>
<content type="string" default="" />
</parameter>
<parameter name="force_stop" unique="0" required="0">
<longdesc lang="en">
If processes or kernel threads are using the array, it cannot be
stopped. We will try to stop processes, first by sending TERM and
then, if that doesn't help in $PROC_CLEANUP_TIME seconds, using KILL.
The lsof(8) program is required to get the list of array users.
Of course, the kernel threads cannot be stopped this way.
If the processes are critical for data integrity, then set this
parameter to false. Note that in that case the stop operation
will fail and the node will be fenced.
</longdesc>
<shortdesc lang="en">force stop processes using the array</shortdesc>
<content type="boolean" default="true" />
</parameter>
<parameter name="udev" unique="0" required="0">
<longdesc lang="en">
Wait until udevd creates a device in the start operation. On a
normally loaded host this should happen quickly, but you may be
unlucky. If you are not using udev set this to "no".
</longdesc>
<shortdesc lang="en">udev</shortdesc>
<content type="boolean" default="true" />
</parameter>
<parameter name="force_clones">
<longdesc lang="en">
Activating the same md RAID array on multiple nodes at the same time
will result in data corruption and thus is forbidden by default.
A safe example could be an array that is only named identically across
all nodes, but is in fact distinct.
Only set this to "true" if you know what you are doing!
</longdesc>
<shortdesc lang="en">force ability to run as a clone</shortdesc>
<content type="boolean" default="false" />
</parameter>
</parameters>
<actions>
<action name="start" timeout="20s" />
<action name="stop" timeout="20s" />
<action name="status" depth="0" timeout="20s" interval="10" />
<action name="monitor" depth="0" timeout="20s" interval="10" />
<action name="validate-all" timeout="5" />
<action name="meta-data" timeout="5" />
</actions>
</resource-agent>
END
}
udev_settle() {
if ocf_is_true $WAIT_FOR_UDEV; then
udevadm settle $*
fi
}
list_conf_arrays() {
test -f $RAIDCONF || {
ocf_log err "$RAIDCONF gone missing!"
exit $OCF_ERR_GENERIC
}
grep ^ARRAY $RAIDCONF | awk '{print $2}'
}
forall() {
local func=$1
local checkall=$2
local mddev rc=0
for mddev in $RAIDDEVS; do
$func $mddev
rc=$(($rc | $?))
[ "$checkall" = all ] && continue
[ $rc -ne 0 ] && return $rc
done
return $rc
}
are_arrays_stopped() {
local rc mddev
for mddev in $RAIDDEVS; do
raid1_monitor_one $mddev
rc=$?
[ $rc -ne $OCF_NOT_RUNNING ] && break
done
test $rc -eq $OCF_NOT_RUNNING
}
md_assemble() {
local mddev=$1
$MDADM --assemble $mddev --config=$RAIDCONF $MDADM_HOMEHOST
udev_settle --exit-if-exists=$mddev
}
#
# START: Start up the RAID device
#
raid1_start() {
local rc
raid1_monitor
rc=$?
if [ $rc -eq $OCF_SUCCESS ]; then
# md already online, nothing to do.
return $OCF_SUCCESS
fi
if [ $rc -ne $OCF_NOT_RUNNING ]; then
# If the array is in a broken state, this agent doesn't
# know how to repair that.
ocf_log err "$RAIDDEVS in a broken state; cannot start (rc=$rc)"
return $OCF_ERR_GENERIC
fi
if [ $HAVE_RAIDTOOLS = "true" ]; then
# Run raidstart to start up the RAID array
$RAIDSTART --configfile $RAIDCONF $MDDEV
else
forall md_assemble all
fi
raid1_monitor
if [ $? -eq $OCF_SUCCESS ]; then
return $OCF_SUCCESS
else
ocf_log err "Couldn't start RAID for $RAIDDEVS"
return $OCF_ERR_GENERIC
fi
}
#
# STOP: stop the RAID device
#
mark_readonly() {
local mddev=$1
local rc
ocf_log info "Attempting to mark array $mddev readonly"
$MDADM --readonly $mddev --config=$RAIDCONF
rc=$?
if [ $rc -ne 0 ]; then
ocf_log err "Failed to set $mddev readonly (rc=$rc)"
fi
return $rc
}
mknod_raid1_stop() {
# first create a block device file, then try to stop the
# array
local rc n tmp_block_file
n=`echo $1 | sed 's/[^0-9]*//'`
if ! ocf_is_decimal "$n"; then
ocf_log warn "could not get the minor device number from $1"
return 1
fi
tmp_block_file="$HA_RSCTMP/${OCF_RESOURCE_INSTANCE}-`basename $1`"
rm -f $tmp_block_file
ocf_log info "block device file $1 missing, creating one in order to stop the array"
mknod $tmp_block_file b 9 $n
$MDADM --stop $tmp_block_file --config=$RAIDCONF --wait-clean -W
rc=$?
rm -f $tmp_block_file
return $rc
}
raid1_stop_one() {
ocf_log info "Stopping array $1"
if [ -b "$1" ]; then
$MDADM --stop $1 --config=$RAIDCONF --wait-clean -W &&
return
else
# newer mdadm releases can stop arrays when given the
# basename; try that first
$MDADM --stop `basename $1` --config=$RAIDCONF --wait-clean -W &&
return
# otherwise create a block device file
mknod_raid1_stop $1
fi
}
get_users_pids() {
local mddev=$1
local outp l
ocf_log debug "running lsof to list $mddev users..."
outp=`lsof $mddev | tail -n +2`
echo "$outp" | awk '{print $2}' | sort -u
echo "$outp" | while read l; do
ocf_log warn "$l"
done
}
stop_raid_users() {
local pids
pids=`forall get_users_pids all | sort -u`
if [ -z "$pids" ]; then
ocf_log warn "lsof reported no users holding arrays"
return 2
else
ocf_stop_processes TERM $PROC_CLEANUP_TIME $pids
fi
}
stop_arrays() {
if [ $HAVE_RAIDTOOLS = "true" ]; then
$RAIDSTOP --configfile $RAIDCONF $MDDEV
else
forall raid1_stop_one all
fi
}
showusers() {
local disk
for disk; do
if have_binary lsof; then
ocf_log info "running lsof to list $disk users..."
ocf_run -warn lsof $disk
fi
if [ -d /sys/block/$disk/holders ]; then
ocf_log info "ls -l /sys/block/$disk/holders"
ocf_run -warn ls -l /sys/block/$disk/holders
fi
done
}
raid1_stop() {
local rc
# See if the MD device is already cleanly stopped:
if are_arrays_stopped; then
return $OCF_SUCCESS
fi
# Turn off raid
if ! stop_arrays; then
if ocf_is_true $FORCESTOP; then
if have_binary lsof; then
stop_raid_users
case $? in
2) false;;
*) stop_arrays;;
esac
else
ocf_log warn "install lsof(8) to list users holding the disk"
false
fi
else
false
fi
fi
rc=$?
if [ $rc -ne 0 ]; then
ocf_log warn "Couldn't stop RAID for $RAIDDEVS (rc=$rc)"
showusers $RAIDDEVS
if [ $HAVE_RAIDTOOLS != "true" ]; then
forall mark_readonly all
fi
return $OCF_ERR_GENERIC
fi
if are_arrays_stopped; then
return $OCF_SUCCESS
fi
ocf_log err "RAID $RAIDDEVS still active after stop command!"
return $OCF_ERR_GENERIC
}
#
# monitor: a less noisy status
#
raid1_monitor_one() {
local mddev=$1
local md=`echo $mddev | sed 's,/dev/,,'`
local rc
local TRY_READD=0
local pbsize
# check if the md device exists first
# but not if we are in the stop operation
# device existence is important only for the running arrays
if [ "$__OCF_ACTION" != "stop" -a ! -b $mddev ]; then
ocf_log info "$mddev is not a block device"
return $OCF_NOT_RUNNING
fi
if ! grep -e "^$md[ \t:]" /proc/mdstat >/dev/null ; then
ocf_log info "$md not found in /proc/mdstat"
return $OCF_NOT_RUNNING
fi
if [ $HAVE_RAIDTOOLS != "true" ]; then
$MDADM --detail --test $mddev >/dev/null 2>&1 ; rc=$?
case $rc in
0) ;;
1) ocf_log warn "$mddev has at least one failed device."
TRY_READD=1
;;
2) ocf_log err "$mddev has failed."
return $OCF_ERR_GENERIC
;;
4) ocf_log err "mdadm failed on $mddev."
return $OCF_ERR_GENERIC
;;
*) ocf_log err "mdadm returned an unknown result ($rc)."
return $OCF_ERR_GENERIC
;;
esac
fi
if [ "$__OCF_ACTION" = "monitor" -a "$OCF_RESKEY_CRM_meta_interval" != 0 \
-a $TRY_READD -eq 1 -a $OCF_CHECK_LEVEL -gt 0 ]; then
ocf_log info "Attempting recovery sequence to re-add devices on $mddev:"
$MDADM $mddev --fail detached
$MDADM $mddev --remove failed
$MDADM $mddev --re-add missing
# TODO: At this stage, there's nothing to actually do
# here. Either this worked or it did not.
fi
pbsize=`(blockdev --getpbsz $mddev || stat -c "%o" $mddev) 2>/dev/null`
if [ -z "$pbsize" ]; then
ocf_log warn "both blockdev and stat could not get the block size (will use 4k)"
pbsize=4096 # try with 4k
fi
if ! dd if=$mddev count=1 bs=$pbsize of=/dev/null \
iflag=direct >/dev/null 2>&1 ; then
ocf_log err "$mddev: I/O error on read"
return $OCF_ERR_GENERIC
fi
return $OCF_SUCCESS
}
raid1_monitor() {
forall raid1_monitor_one
}
#
# STATUS: is the raid device online or offline?
#
raid1_status() {
# See if the MD device is online
local rc
raid1_monitor
rc=$?
if [ $rc -ne $OCF_SUCCESS ]; then
echo "stopped"
else
echo "running"
fi
return $rc
}
raid1_validate_all() {
return $OCF_SUCCESS
}
PROC_CLEANUP_TIME=3
if
( [ $# -ne 1 ] )
then
usage
exit $OCF_ERR_ARGS
fi
case "$1" in
meta-data)
meta_data
exit $OCF_SUCCESS
;;
usage)
usage
exit $OCF_SUCCESS
;;
*)
;;
esac
RAIDCONF="$OCF_RESKEY_raidconf"
MDDEV="$OCF_RESKEY_raiddev"
FORCESTOP="${OCF_RESKEY_force_stop:-1}"
WAIT_FOR_UDEV="${OCF_RESKEY_udev:-1}"
if [ -z "$RAIDCONF" ] ; then
ocf_log err "Please set OCF_RESKEY_raidconf!"
exit $OCF_ERR_CONFIGURED
fi
if [ ! -r "$RAIDCONF" ] ; then
ocf_log err "Configuration file [$RAIDCONF] does not exist, or can not be opend!"
exit $OCF_ERR_INSTALLED
fi
if [ -z "$MDDEV" ] ; then
ocf_log err "Please set OCF_RESKEY_raiddev to the Raid device you want to control!"
exit $OCF_ERR_CONFIGURED
fi
if ocf_is_clone && ! ocf_is_true "$OCF_RESKEY_force_clones"; then
ocf_log err "md RAID arrays are NOT safe to run as a clone!"
ocf_log err "Please read the comment on the force_clones parameter."
exit $OCF_ERR_CONFIGURED
fi
if ocf_is_true $WAIT_FOR_UDEV && ! have_binary udevadm; then
if [ "$__OCF_ACTION" = "start" ]; then
ocf_log warn "either install udevadm or set udev to false"
ocf_log info "setting udev to false!"
fi
WAIT_FOR_UDEV=0
fi
if ! ocf_is_true $WAIT_FOR_UDEV; then
export MDADM_NO_UDEV=1
fi
if ocf_is_true $FORCESTOP && ! have_binary lsof; then
ocf_log warn "Please install lsof(8), we may need it when stopping Raid device! Now continuing anyway ..."
fi
HAVE_RAIDTOOLS=false
if have_binary $MDADM >/dev/null 2>&1 ; then
if [ -n "$OCF_RESKEY_homehost" ]; then
MDADM_HOMEHOST="--homehost=${OCF_RESKEY_homehost}"
else
MDADM_HOMEHOST=""
fi
else
check_binary $RAIDSTART
HAVE_RAIDTOOLS=true
fi
if [ $HAVE_RAIDTOOLS = true ]; then
if [ "$MDDEV" = "auto" ]; then
ocf_log err "autoconf supported only with mdadm!"
exit $OCF_ERR_INSTALLED
elif [ `echo $MDDEV|wc -w` -gt 1 ]; then
ocf_log err "multiple devices supported only with mdadm!"
exit $OCF_ERR_INSTALLED
fi
fi
if [ "$MDDEV" = "auto" ]; then
RAIDDEVS=`list_conf_arrays`
else
RAIDDEVS="$MDDEV"
fi
# At this stage,
# [ $HAVE_RAIDTOOLS = false ] <=> we have $MDADM,
# otherwise we have raidtools (raidstart and raidstop)
# Look for how we are called
case "$1" in
start)
raid1_start
;;
stop)
raid1_stop
;;
status)
raid1_status
;;
monitor)
raid1_monitor
;;
validate-all)
raid1_validate_all
;;
*)
usage
exit $OCF_ERR_UNIMPLEMENTED
;;
esac
exit $?

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