Setting Up An Active/Active Samba CTDB Cluster Using GFS & DRBD (CentOS 5.5) - Page 3

6. Configuring Samba

The samba configuration is very common. In this article, we don't cover how to configure samba. We only explain a very simple configuration.
Do it on both nodes:

First, we need to configure /etc/samba/smb.conf on both nodes:

vi /etc/samba/smb.conf

[global]

clustering = yes
idmap backend = tdb2
private dir=/clusterdata/ctdb
fileid:mapping = fsname
use mmap = no
nt acl support = yes
ea support = yes

[public]
comment = public share
path = /clusterdata/public
public = yes
writeable = yes
only guest = yes

We must to create the directories used by samba (only on one node):

mkdir /clusterdata/ctdb
mkdir /clusterdata/public
chmod 777 /clusterdata/public

Adding root on samba, only on one node:

smbpasswd -a root

7. Configuring CTDB

The process to install ctdb it's very simple. Do it on both nodes:

First, we need to download it:

cd /usr/src
rsync -avz samba.org::ftp/unpacked/ctdb .
cd ctdb/

Then we can compile it:

cd /usr/src/ctdb/
./autogen.sh
./configure
make
make install

Creating the init scripts and config links to /etc:

cp config/ctdb.sysconfig /etc/sysconfig/ctdb
cp config/ctdb.init /etc/rc.d/init.d/ctdb
chmod +x /etc/init.d/ctdb

ln -s /usr/local/etc/ctdb/ /etc/ctdb
ln -s /usr/local/bin/ctdb /usr/bin/ctdb
ln -s /usr/local/sbin/ctdbd /usr/sbin/ctdbd

Next, we need to config /etc/sysconfig/ctdb on both nodes:

vi /etc/sysconfig/ctdb

CTDB_RECOVERY_LOCK="/dadoscluster/ctdb/storage"
CTDB_PUBLIC_INTERFACE=eth0
CTDB_PUBLIC_ADDRESSES=/etc/ctdb/public_addresses
CTDB_MANAGES_SAMBA=yes
ulimit -n 10000
CTDB_NODES=/etc/ctdb/nodes
CTDB_LOGFILE=/var/log/log.ctdb
CTDB_DEBUGLEVEL=2
CTDB_PUBLIC_NETWORK="10.0.0.0/24"
CTDB_PUBLIC_GATEWAY="10.0.0.9"

Now, config /etc/ctdb/public_addresses on both nodes:

vi /etc/ctdb/public_addresses

10.0.0.183/24
10.0.0.184/24

Then, config /etc/ctdb/nodes on both nodes:

vi /etc/ctdb/nodes

10.0.0.181
10.0.0.182

Then, config /etc/ctdb/events.d/11.route on both nodes:

vi /etc/ctdb/events.d/11.route

#!/bin/sh

. /etc/ctdb/functions
loadconfig ctdb

cmd="$1"
shift

case $cmd in
    takeip)
         # we ignore errors from this, as the route might be up already when we're grabbing
         # a 2nd IP on this interface
         /sbin/ip route add $CTDB_PUBLIC_NETWORK via $CTDB_PUBLIC_GATEWAY dev $1 2> /dev/null
         ;;
esac

exit 0

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