csync2: Install and setup csync2 on CentOS 5

This blog details how to build and install csync2 form source, as well as configure it.

Step 1) Download and install required libraries

If you haven’t already done so, install graft – it’s great. Here’s a tutorial how to install graft:

Go to ftp://ftp.gnupg.org/gcrypt/libgpg-error/ and download the latest version of libgpg-error

cd /usr/local/PKG_BUILD
wget ftp://ftp.gnupg.org/gcrypt/libgpg-error/libgpg-error-1.6.tar.bz2
bzip2 -d libgpg-error-1.6.tar.bz2
tar -xvf libgpg-error-1.6.tar
cd libgpg-error-1.6
./configure –prefix=/usr/local/PACKAGES/libgpg-error-1.6
make install
graft -i /usr/local/PACKAGES/libgpg-error-1.6/

Go to http://www.gnupg.org/download/index.en.html, and download libgcrypt and install it:

cd /usr/local/PKG_BUILD
wget ftp://ftp.gnupg.org/gcrypt/libgcrypt/libgcrypt-1.4.1.tar.bz2
bzip2 -d libgcrypt-1.4.1.tar.bz2
cd libgcrypt-1.4.1
./configure –prefix=/usr/local/PACKAGES/libgcrypt-1.4.1
make install
graft -i /usr/local/PACKAGES/libgcrypt-1.4.1

Go to http://www.t2-project.org/packages/libtasn1.html, and download libtasn1

cd /usr/local/PKG_BUILD
wget ftp://ftp.gnutls.org/pub/gnutls/libtasn1/libtasn1-1.4.tar.gz
tar -xvzf libtasn1-1.4.tar.gz
cd libtasn1-1.4
./configure –prefix=/usr/local/PACKAGES/libtasn1-1.4
make install
graft -i /usr/local/PACKAGES/libtasn1-1.4

If you get a conflict, you can just remove the conflicting file and retry the graft:

rm -f /usr/local/share/info/dir
graft -i /usr/local/PACKAGES/libtasn1-1.4

Go to http://www.sqlite.org/download.html, and download the source tree file:

cd /usr/local/PKG_BUILD
wget http://www.sqlite.org/sqlite-3.5.9.tar.gz
tar -xvzf sqlite-3.5.9.tar.gz
cd sqlite-3.5.9
./configure –prefix=/usr/local/PACKAGES/sqlite-3.5.9
make install
graft -i /usr/local/PACKAGES/sqlite-3.5.9

Go to http://www.gnu.org/software/gnutls/releases/, and download the latest gnutls:

cd /usr/local/PKG_BUILD
wget http://www.gnu.org/software/gnutls/releases/gnutls-2.4.0.tar.bz2
bzip2 -d gnutls-2.4.0.tar.bz2
tar -xvf gnutls-2.4.0.tar
cd gnutls-2.4.0
./configure –prefix=/usr/local/PACKAGES/gnutls-2.4.0
make install
graft -i /usr/local/PACKAGES/gnutls-2.4.0

Once again, if you get a conflict:

rm -f /usr/local/share/info/dir
graft -i /usr/local/PACKAGES/gnutls-2.4.0

Go to http://librsync.sourceforge.net/ and download the latest librsync source:

cd /usr/local/PKG_BUILD
wget http://internode.dl.sourceforge.net/sourceforge/librsync/librsync-0.9.7.tar.gz
tar -xvzf librsync-0.9.7.tar.gz
cd librsync-0.9.7
./configure –prefix=/usr/local/PACKAGES/librsync-0.9.7
make install
graft -i /usr/local/PACKAGES/librsync-0.9.7

Step 2) Download and install csync2

Go to http://oss.linbit.com/csync2/ and download the latest csync2 source:

cd /usr/local/PKG_BUILD
wget http://oss.linbit.com/csync2/csync2-1.34.tar.gz
tar -xvzf csync2-1.34.tar.gz
cd csync2-1.34

Now I couldn’t get csync2 to locate libsqlite. Seems it doesn’t like the latest version (3) anyway, so we have to go back and download & install an older version:

cd /usr/local/PKG_BUILD
wget http://www.sqlite.org/sqlite-2.8.17.tar.gz
tar -xvzf sqlite-2.8.17.tar.gz
cd sqlite-2.8.17
./configure –prefix=/usr/local/PACKAGES/sqlite-2.8.17
make install
graft -i /usr/local/PACKAGES/sqlite-2.8.17

Now, back to csync2. Note that we also run ldconfig just to make sure all our libraries are findable:

cd /usr/local/PKG_BUILD/csync2-1.34
./configure –prefix=/usr/local/PACKAGES/csync2-1.34
make install
graft -i /usr/local/PACKAGES/csync2-1.34

And we’re done! csync is compiled and installed! On to step 3….

Step 3) Set up xinetd

By default my CentOS 5 server did not have xinetd installed, so let’s install it

yum install xinetd

Create the following file as /etc/xinetd.d/csync2:

service csync2
disable = no
protocol = tcp
socket_type = stream
wait = no
user = root
server = /usr/local/sbin/csync2
server_args = -i

The csync2 protocol isn’t a standard one so we need to add it:

echo “csync2 30865/tcp” >> /etc/services

Then let’s restart xinetd:

service xinetd restart

And xinetd is ready…..now we need to configure csync2….

Step 4) Configuring csync2


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1 Comment

  • By cio, May 7, 2009 @ 10:11 am

    thanks for this post.

    i use csync2 with inotifywait, which listens file system events as they’re broadcast by the kernel-level file system monitoring system, inotify.

    – inotifywait is available from sourceforge.
    – building from source is extremely straightforward.

    this simple script can be used for monitoring file system events for a specific directory, in this case ‘/var/www’, which then kicks off a csync2 run:
    inotifywait -mrq –format ‘%f’ \
    -e close_write -e create -e delete -e move /var/www | while read file; do
    /usr/local/sbin/csync2 -x >/dev/null 2>&1

    hint: you can add multiple directories, such as apache’s conf directory and use csync2’s “action” function to gracefully restart apache across the entire farm.

    these two solutions combined make for an awesome cluster replication utility.

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