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Trac/SVN Migration to SL59

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Prior Migration Notes

Trac Migration to SL59

review current instance installation

System apache config pulls in config:

Include /etc/httpd/conf/svnsetup/setup.conf

which then pulls:

Include /etc/httpd/conf/svnsetup/repos.conf
Include /etc/httpd/conf/svnsetup/svn.conf
Include /etc/httpd/conf/svnsetup/tracs.conf

The tracs.conf connects to mod python in system python2.3:

<Location /tracs>
   SetHandler mod_python
   PythonPath "sys.path + ['/usr/lib/python2.3/site-packages']"
   PythonHandler trac.web.modpython_frontend
   PythonOption TracEnvParentDir /home/scm/tracs
   PythonOption TracUriRoot /tracs

current server

[dayabay] /home/blyth > uname -a
Linux dayabay.ihep.ac.cn 2.6.9-104.ELsmp #1 SMP Fri Jul 6 09:14:38 CEST 2012 i686 i686 i386 GNU/Linux

[dayabay] /home/blyth > cat /etc/redhat-release
Scientific Linux CERN SLC release 4.8 (Beryllium)

[dayabay] /home/blyth > python -V
Python 2.3.4

[dayabay] /home/blyth > python -c "import sys ; print '\n'.join(sys.path) "

/usr/lib/python2.3/site-packages/configobj-4.6.0-py2.3.egg
/usr/lib/python2.3/site-packages/Genshi-0.5-py2.3-linux-i686.egg
/usr/lib/python2.3/site-packages/Trac-0.11-py2.3.egg
/usr/lib/python2.3/site-packages/TracAccountManager-0.2.1dev_r3857-py2.3.egg
/usr/lib/python2.3/site-packages/BittenNotify-0.1dev_r28-py2.3.egg
/usr/lib/python2.3/site-packages/TracFullBlogPlugin-0.1-py2.3.egg
/usr/lib/python2.3/site-packages/NavAdd-0.1-py2.3.egg
/usr/lib/python2.3/site-packages/SilverCity-0.9.7-py2.3-linux-i686.egg
/usr/lib/python2.3/site-packages/textile-2.0.11-py2.3.egg
/usr/lib/python2.3/site-packages/Trac2Latex-0.0.1-py2.3.egg
/usr/lib/python2.3/site-packages/Trac2MediaWiki-0.0.2-py2.3.egg
/usr/lib/python2.3/site-packages/TracNav-4.0pre6-py2.3.egg
/usr/lib/python2.3/site-packages/TracTags-0.6-py2.3.egg
/usr/lib/python2.3/site-packages/TracTocMacro-11.0.0.3-py2.3.egg
/usr/lib/python2.3/site-packages/setuptools-0.6c11-py2.3.egg
/usr/lib/python2.3/site-packages/virtualenv-1.4.3.post1-py2.3.egg
/usr/lib/python2.3/site-packages/pip-0.6.post1-py2.3.egg
/usr/lib/python2.3/site-packages/supervisor-3.0a7-py2.3.egg
/usr/lib/python2.3/site-packages/elementtree-1.2.7_20070827_preview-py2.3.egg
/usr/lib/python2.3/site-packages/meld3-0.6.6-py2.3.egg
/usr/lib/python2.3/site-packages/hashlib-20081119-py2.3-linux-i686.egg
/usr/lib/python2.3/site-packages/Bitten-0.6dev_r561-py2.3.egg
/usr/lib/python2.3/site-packages/BitExtra-0.0.1-py2.3.egg
/usr/lib/python23.zip
/usr/lib/python2.3
/usr/lib/python2.3/plat-linux2
/usr/lib/python2.3/lib-tk
/usr/lib/python2.3/lib-dynload
/usr/lib/python2.3/site-packages
/usr/lib/python2.3/site-packages/gtk-2.0


[dayabay] /home/blyth > svn --version
svn, version 1.4.4 (r25188)
   compiled Nov 21 2007, 11:15:10

dayabay1 test machine

Double hop required to get in:

simon:~ blyth$ ssh II
Last login: Fri Sep 13 16:06:11 2013 from simon.phys.ntu.edu.tw
**********************************************************************
|  Time  |      Up Time     |Loing Users|        Load Average        |
 16:08:44 up 52 days, 11:59, 28 users,  load average: 1.19, 0.96, 1.07
**********************************************************************
TEL:5037(office);83050656

-bash-3.2$ ssh NN
Last login: Fri Sep 13 16:07:57 2013 from lxslc514.ihep.ac.cn

[root@dayabay1 ~]# uname -a
Linux dayabay1 2.6.18-308.el5 #1 SMP Fri Feb 24 08:42:10 CET 2012 x86_64 x86_64 x86_64 GNU/Linux

[root@dayabay1 ~]# cat /etc/redhat-release
Scientific Linux CERN SLC release 5.9 (Boron)

[root@dayabay1 ~]# python -V
Python 2.4.3

[root@dayabay1 ~]# python -c "import sys ; print '\n'.join(sys.path) "

/usr/lib64/python24.zip
/usr/lib64/python2.4
/usr/lib64/python2.4/plat-linux2
/usr/lib64/python2.4/lib-tk
/usr/lib64/python2.4/lib-dynload
/usr/lib64/python2.4/site-packages
/usr/lib64/python2.4/site-packages/Numeric
/usr/lib64/python2.4/site-packages/gtk-2.0
/usr/lib/python2.4/site-packages

[root@dayabay1 ~]# which svn
/usr/bin/svn

[root@dayabay1 ~]# svn --version
svn, version 1.6.11 (r934486)
   compiled Apr 12 2013, 08:05:38

svn migrate 1.4 1.6

svnadmin create --pre-1.5-compatible /path/to/repo
svnadmin load /path/to/repo <dumpfile
svnadmin upgrade /path/to/repo

svnbook on migration

–pre-1.4-compatible
When creating a new repository, use a format that is compatible with versions of Subversion earlier than Subversion 1.4.
–pre-1.5-compatible
When creating a new repository, use a format that is compatible with versions of Subversion earlier than Subversion 1.5.
–pre-1.6-compatible
When creating a new repository, use a format that is compatible with versions of Subversion earlier than Subversion 1.6.

svn version migration

This looks forced as we have been using system 1.4 and the new system uses 1.6.

trac version migration

System (yum distro) versions are 0.10.4, 0.10.5 on the old and new. We have been using 0.11, no compelling reason to change.

Problematic due to bitten, the patches that have been applied, and the large number of plugins.

On old machine we use python2.3 site-packages level install, not system level with /usr/lib/python2.3/site-packages/Trac-0.11-py2.3.egg

version pinned due to bitten and patches

The bitten trac plugin provides a master/slave system that requires (from bitter experience) that the slaves (installed at BNL,LBNL,IHEP,NTU,NUU) use precisely the same version of bitten that the master Trac instance does. This effectively pins the bitten version of the master, without having to reinstall all the slaves.

Other reasons to keep the same version:

what to change ?

As little as possible, but:

  1. update AccountManager plugin
  2. remember docutils and RST support in Trac
  3. check the tickets and notes for long forgotten things to change, eg bitten build web UI

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