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|
#!/bin/bash
#
# outdate-peer.sh
# This file is part of DRBD by Philipp Reisner and Lars Ellenberg.
#
#
# It is expected that your clustermanager of choice brings its own
# implementation of this ... E.g. Heartbeat's variant should be able
# to use all of Heartbeat's communication pathes, including the
# serial connections.
#
# This script requires, that there is a password less ssh-key for
# root. You should not use such keys on a bigger scale. Only use
# it with the "from" option!
#
# How to setup SSH:
#
# 1. ssh-keygen -t dsa (as root, on the first machine)
# no passphrase!
#
# 2. go to the second machine, edit the file .ssh/authorized_keys2
# Start a line with from="10.9.9.181,10.99.99.1" [content of id_dsa.pub]
# Put the IPs of you first machine here, also the id_dsa.pub
# is from the first machine All needs to be in a single line.
#
# 3. ssh from the first machine to the second one, do this for all
# IP addresses of the second machine. When doing this the first
# time it asks you if it should ad the fingerprint to the list
# of known hosts: Say yes here.
#
# 4. Do this a second time for each IP address, now it should not ask
# any questions...
#
# Repeate this 4 steps for the other direction, BTW, you can not
# copy the file over, since you have two distrinct keys.. and also
# the IP addresses in the from="" part are different.
#
#
# The caller (drbdadm) sets DRBD_RESOURCE and DRBD_PEER for us.
#
TIMEOUT=6
for P in "$@"; do
if [ "$P" = "on" ]; then
EXP_HOST_NAME=1
EXP_PEER_IP=0
EXP_OWN_IP=0
else
if [ "$EXP_PEER_IP" = "1" ]; then
PEER_IP="$PEER_IP $P"
fi;
if [ "$EXP_OWN_IP" = "1" ]; then
OWN_IP="$OWN_IP $P"
fi;
if [ "$EXP_HOST_NAME" = "1" ]; then
if [ "$P" != `uname -n` ]; then
EXP_PEER_IP=1
else
EXP_OWN_IP=1
fi
EXP_HOST_NAME=0
fi
fi
done
if [ -z "$PEER_IP" -o -z "$OWN_IP" ]; then
echo "USAGE: outdate-peer.sh on host1 IP IP ... on host2 IP IP ..."
exit 10
fi
for IP in $PEER_IP; do
ssh $IP drbdadm outdate ${DRBD_RESOURCE:-r0} &
SSH_PID="$SSH_PID $!"
done
SSH_CMDS_RUNNING=1
while [ "$SSH_CMDS_RUNNING" = "1" ] && [ $TIMEOUT -gt 0 ]; do
sleep 1
SSH_CMDS_RUNNING=0
for P in $SSH_PID; do
if [ -d /proc/$P ]; then SSH_CMDS_RUNNING=1; fi
done
TIMEOUT=$(( $TIMEOUT - 1 ))
done
RV=5
for P in $SSH_PID; do
if [ -d /proc/$P ]; then
kill $P
wait $P
else
wait $P
EXIT_CODE=$?
# exit codes of drbdmeata outdate:
# 5 -> is inconsistent
# 0 -> is outdated
# 17 -> outdate failed because peer is primary.
# Unfortunately 20 can have other reasons too....
if [ $EXIT_CODE -eq 5 ]; then RV=3; else
if [ $EXIT_CODE -eq 17 ]; then RV=6; else
if [ $EXIT_CODE -eq 0 ]; then RV=4; else
echo "do not know about this exit code"
fi
fi
fi
fi
done
# We return to DRBD - kernel driver:
#
# 6 -> peer is primary (and UpToDate)
# 5 -> peer is down / unreachable.
# 4 -> peer is outdated
# 3 -> peer is inconsistent
exit $RV
|
