Difference between revisions of "Virtual MusicBrainz Server"

From MusicBrainz Wiki
(+ Setting up your server as a replication "Slave")
m (Redirecting to MusicBrainz Server/Setup)
(22 intermediate revisions by 12 users not shown)
Line 1: Line 1:
<small>[[Products]] > [[Server]] > [[Server Development|Server development]] > [[Server Setup|Server setup]] > Virtual MusicBrainz Server </small>
#REDIRECT [[MusicBrainz Server/Setup]]
==What Is the Virtual MusicBrainz Server?==
The Virtual [[MusicBrainz]] Server is a virtual machine image containg a Linux environment fully configured with the latest release of the mb_server source code.  If you want to experiment with the data, or try hacking on some new features, it is intended to be the fastest way to get up and running.
The image is built using VMWare Workstation.  Windows and Linux users can run it in the free [http://www.vmware.com/player/ VMWare Player] or [http://www.vmware.com/server/ VMWare Server] software, and Mac users can use [http://vmware.com/mac/ VMWare Fusion].  On the PC you're intending to run VMWare, you need at least 512Mb of RAM and at least 10Gb of free disk space.
==What's in the Image?==
The virtual server is running the base [[WikiPedia:Debian|Debian]] unstable installation, fully patched as of the time of release.  It also includes pre-configured versions of Apache, mod_perl, all the perl dependencies, and Postgresql.
There is a full check-out of the latest [[MusicBrainz]] server release, and an empty MusicBrainz database.
[TODO: Explain disk partitions.  4Gb root, 10Gb data.  vmdx files will expand]
==Running the Virtual MusicBrainz Server==
===Before you begin===
# Download [http://www.vmware.com/products/player VMWare Player] or [http://www.vmware.com/products/fusion/ VMWare Fusion] for Mac OS-X and follow the instructions for installing and setting it up.
# Download the Virtual [[MusicBrainz]] Server image from [ftp://ftp.musicbrainz.org/pub/musicbrainz/MBServer-20090524.tar.bz2 ftp://ftp.musicbrainz.org/pub/musicbrainz/MBServer-20090524.tar.bz2].  To extract it in Windows, you can use [http://www.7-zip.org/ 7-Zip].  From the .bz2 you will extract a .tar from which you will extract the VMware files themselves. You can remove the .tar file now.  Linux users can use <code><nowiki>tar xvjf MBServer-20090224.tar.bz2</nowiki></code>.
===First run===
# Start the virtual machine in VMWare: run VMware, then navigate to the folder where you extracted the VMware files and choose MBServer. VMware will now boot Linux in a virtual machine. Wait until you get the prompt: "brainzvm login:"
# There are two users on the system with passwords:  "root" and "mbserver".  '''By default, the user passwords are the same as the usernames.'''  So the first thing to do is login as root, and change the passwords to something a smidge more secure.
<pre>brainzvm:~# passwd root
Enter new UNIX password:  [enter a new password]
Retype new UNIX password:  [repeat it]
passwd: password updated successfully
brainzvm:~# passwd mbserver
Enter new UNIX password:  [enter a new password]
Retype new UNIX password:  [repeat it]
passwd: password updated successfully
# Make sure you have an internet connection inside your virtual machine by pinging Google.  (This may fail if you're behind a firewall that blocks pings.)
<pre>brainzvm:~# ping -c 3 google.com
PING google.com ( 56(84) bytes of data.
64 bytes from icmp_seq=1 ttl=244 time=17.3 ms
64 bytes from icmp_seq=2 ttl=244 time=17.9 ms
64 bytes from icmp_seq=3 ttl=244 time=8.85 ms
--- google.com ping statistics ---
3 packets transmitted, 3 received, 0% packet loss, time 2029ms
rtt min/avg/max/mdev = 8.854/14.718/17.950/4.153 ms
# If this works, find out what IP address is assigned to your virtual server by running ifconfig.
<pre>brainzvm:~# ifconfig
eth0      Link encap:Ethernet  HWaddr 00:0C:29:62:7F:57
          inet addr:  Bcast:  Mask:
                  [ ^^^^^^^^^^^^^^ this is the address you care about ]
# Outside of your virtual machine, open a webbrowser and try accessing the virtual IP address as [http://ipaddress/ http://ipaddress/].  You should see the MusicBrainz homepage, but with a banner that reads "Brainzvm Server".
# Logout.
===Loading data===
# Outside the VM, ssh into it, as the mbserver user.  (Windows users can use the excellent ssh client [http://www.chiark.greenend.org.uk/~sgtatham/putty/ PuTTY]).  This makes it easier to cut and paste things from this document.
# Now let's download the latest MB data dump.  Use <code><nowiki> lynx http://ftp.musicbrainz.org/pub/musicbrainz/data/fullexport/ </nowiki></code>, go into the latest folder and get the ''mbdump.tar.bz2'', ''mbdump-derived.tar.bz2'' and ''mbdump-stats.tar.bz2'' files.  (You can grab the other files if you want, but the data they contain is stuff like old moderations; Nothing necessary to get your server up and running)  Save them to the mbserver home directory then press 'q' to exit lynx.
# In mbserver's home directory is a directory called ''svn''.  This contains the latest MusicBrainz server code at the time of release.  To make sure you have an up-to-date copy:
<pre>mbserver@brainzvm:~$ cd svn/mb_server
mbserver@brainzvm:~/svn/mb_server$ svn up
# Stop apache, drop the empty musicbrainz database, and import these dumps:
<pre>mbserver@brainzvm:~/svn/mb_server$ su -
brainzvm:~# /etc/init.d/apache-perl stop
Stopping web server: apache-perl.
brainzvm:~# exit
mbserver@brainzvm:~/svn/mb_server$ dropdb -U postgres musicbrainz_db
mbserver@brainzvm:~/svn/mb_server$ dropdb -U postgres musicbrainz_db_raw
mbserver@brainzvm:~/svn/mb_server$ ./admin/InitDb.pl --createdb --echo --import  -- --tmp-dir=/mnt/data/tmp ~/mbdump*.tar.bz2
<snip> -- Go get some coffee and a book, cause this'll take at least an hour to run.
Fri Oct 21 21:11:56 2005 : Initialized and imported data into the database.
Fri Oct 21 21:11:56 2005 : InitDb.pl succeeded
mbserver@brainzvm:~$ su -
brainzvm:~# /etc/init.d/apache-perl start
Starting web server: apache-perl.
brainzvm:~# exit
# Going to [http://ipaddress/ http://ipaddress/] should now present you with your very own searchable MusicBrainz server.  Hurrah!
If you see an error during the data load "Schema sequence mismatch - codebase is <number>, /home/mbserver/mbdump-derived.tar.bz2 is <other number>"  then see this forum message  [http://forums.musicbrainz.org/viewtopic.php?pid=3516 http://forums.musicbrainz.org/viewtopic.php?pid=3516] 
===Hacking on the code===
[TODO:  Link to some developer documentation]
===Working with the database===
If you want to access Postgresql from other tools you should change two configurations files. Both are located in the configuration directory. If you use version 8.3 you'll find it under /etc/postgresql/8.3/main:
in file pg_hba.conf put the following line:  <pre>host    all        all            md5
in file postgresql.conf  <pre>listen_addresses = '*'
After you are done remember to restart postgres <pre>/etc/init.d/postgresql-8.3 restart
Also a change of the password of the postgres user is required:
<pre>mserver@brainzvm:~/svn/mb_server$ ./admin/psql SYSTEM
template1=# alter user postgres with password 'postgres';
===Setting up your server as a replication "Slave"===
[[Image:Attention.png]] ''The [[Live Data Feed]] is restricted to non-commercial settings. For a commercial setting, you will need to obtain a commercial data license from the MetaBrainz Foundation''
====Define your server as a replication "Slave"====
Change the type of your server: edit <code>cgi-bin/DBDefs.pm</code> and change
<pre>sub REPLICATION_TYPE { RT_SLAVE }</pre>
'''If you have just imported data with an RT_STANDALONE setting''', the following extra steps are required:
<pre>mserver@brainzvm:~/svn/mb_server$ ./admin/psql READWRITE < admin/sql/DropFKConstraints.sql
mserver@brainzvm:~/svn/mb_server$ ./admin/psql RAWDATA < admin/sql/DropFKConstraints.sql
mserver@brainzvm:~/svn/mb_server$ ./admin/psql READWRITE < admin/sql/DropTriggers.sql
====Syncing your server====
<pre>mserver@brainzvm:~/svn/mb_server$ ./admin/replication/LoadReplicationChanges</pre>
Replication changes are created each hour, so you can add the following entry to the mbserver crontab:
<pre>0 * * * * /home/mbserver/svn/mb_server/admin/cron/slave.sh</pre>

Latest revision as of 01:35, 11 November 2011