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|
#!/bin/bash -e
base="/usr/share/doc/ctdb/examples/nfs-kernel-server/"
logfile="/tmp/enable-ctdb-nfs.$$.log" ; touch $logfile ;
ghostname=""
# functions ---------
die() { echo error: $@; echo ; exit 1; };
getout() { echo exit: $@; echo ; exit 0; };
stopservice() { echo stopping $1... ; systemctl stop $1 2>&1 >> $logfile 2>&1; }
disableservice() { echo disabling $1... ; systemctl disable $1 2>&1 >> $logfile 2>&1; }
startservice() { echo starting $1... ; systemctl start $1 2>&1 >> $logfile 2>&1; }
sysctlrefresh() { echo refreshing sysctl... ; sysctl --system 2>&1 >> $logfile 2>&1; }
backupfile() {
echo backing up $1
[ -f $1.prvctdb ] && die "backup file $1 already exists!"
[ -f $1 ] && cp $1 $1.prvctdb || true
}
renamefiles() {
for f; do
[ -f "$f" ] || continue
echo "Renaming $f to $f.prvctdb"
mv "$f" "$f".prvctdb
done
}
checkservice() {
(systemctl list-unit-files | grep -q $1.service) || die "service $1 not found"
}
replacefile() {
origfile=$1
replfile=$2
[ ! -f $base/$origfile ] && die "coult not find $base/$origfile"
echo replacing $replfile...
cp $base/$origfile $replfile
}
appendfile() {
origfile=$1
replfile=$2
[ ! -f $base/$origfile ] && die "coult not find $base/$origfile"
echo appending $base/$origfile to $replfile...
cat $base/$origfile >> $replfile
}
execnfsenv() {
file=$1 ; [ -f $file ] || due "inexistent file $file";
echo executing $file...
$file 2>&1 >> $logfile 2>&1;
}
fixnfshostname() {
type nfsconf > /dev/null 2>&1 || die "nfsconf(8) not found"
if [ "$ghostname" == "" ]; then
echo "What is the FQDN for the public IP address of this host ?"
echo -n "> "
read ghostname
fi
echo "Setting $ghostname in nfs.conf..."
nfsconf --set statd name "$ghostname"
}
# end of functions --
[ $UID != 0 ] && die "you need root privileges"
echo """
This script will enable CTDB NFS HA by changing the following files:
(1) /etc/nfs.conf ( replace )
(2) /etc/nfs.conf.d/*.conf ( rename )
(3) /etc/services ( append )
(4) /etc/sysctl.d/98-nfs-static-ports.conf ( create )
(5) /etc/default/quota ( replace )
and disabling the following services, as they will be managed
by ctdb:
(1) rpcbind
(2) nfs-kernel-server
(3) rpc.rquotad
Obs:
- replaced files keep previous versions as "file".prevctdb
- dependant services will also be stopped
"""
while true; do
echo -n "Do you agree with this change ? (N/y) => "
read answer
[ "$answer" == "n" ] && getout "exiting without any changes"
[ "$answer" == "y" ] && break
done
echo "checking requirements..."
checkservice nfs-kernel-server
checkservice quota
checkservice rpcbind
echo "requirements okay!"
echo
backupfile /etc/nfs.conf
renamefiles /etc/nfs.conf.d/*.conf
backupfile /etc/services
backupfile /etc/default/quota
echo
set +e
stopservice ctdb.service
stopservice quota.service
stopservice nfs-kernel-server.service
stopservice rpcbind.service
stopservice rpcbind.socket
stopservice rpcbind.target
echo
disableservice ctdb.service
disableservice quota.service
disableservice nfs-kernel-server.service
disableservice rpcbind.service
disableservice rpcbind.socket
disableservice rpcbind.target
echo
set -e
replacefile nfs.conf /etc/nfs.conf
replacefile 98-nfs-static-ports.conf /etc/sysctl.d/98-nfs-static-ports.conf
replacefile quota /etc/default/quota
echo
appendfile services /etc/services
echo
fixnfshostname
echo
sysctlrefresh
echo
echo """Finished! Make sure to configure properly:
- /etc/exports (containing the clustered fs to be exported)
- /etc/ctdb/nodes (containing all your node private IPs)
- /etc/ctdb/public_addressess (containing public addresses)
A log file can be found at:
- /tmp/enable-ctdb-nfs.$$.log
Remember:
- to place a cluster lock in /etc/ctdb/ctdb.conf:
...
[cluster]
cluster lock = /clustered.filesystem/.reclock
...
And, make sure you enable ctdb service again:
- systemctl enable ctdb.service
- systemctl start ctdb.service
Enjoy!
"""
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