On Fri, 28 Mar 2014 10:35:20 -0700
Kevin Goess <kgo...@bepress.com> wrote:
> 
> Does anybody have any experience with upgrading in-place?  Are there any
> recommendations for one or the other?

It works well if you pg_dumpall, remove postgres, upgrade debian, then 
reinstall postgres and restore from dumpall. 

Remember to do 'upgrade-grub' before rebooting, so that the new kernel's 
parameters are loaded (if you use grub2)

I followed the instructions on this page : 
http://www.howtoforge.com/how-to-upgrade-debian-squeeze-to-wheezy

Below are the notes I took while upgrading my server. I use a LAMP stack made 
of postgresql, apache and mod_perl.



#
#upgrade server to new debian stable (Squeeze -> Wheezy)
#

#dump the dbs
cd /tmp
su postgres
pg_dumpall > 8.4.out 

#remove old pg
apt-get purge postgresql-8.4 postgresql-client-8.4 postgresql-plperl-8.4

#mettre à jour
apt-get update 
apt-get upgrade
apt-get dist-upgrade

#no packages must be on hold
dpkg --audit 
dpkg --get-selections | grep hold

# Press g and the list shows which packages need your attention. Fix any 
packages in the action list, until the message says:
# No packages are scheduled to be installed, removed or upgraded
# Only then you are done and ready to pass this point.
aptitude

#edit /etc/apt/sources.list
sed -i 's/squeeze/wheezy/g' /etc/apt/sources.list

#using this one now
deb http://ftp.fr.debian.org/debian/ wheezy main contrib non-free

#instructions : http://www.debian.org/security/
deb http://security.debian.org/ wheezy/updates main contrib non-free


#launch actual upgrade
apt-get update
apt-get upgrade
apt-get dist-upgrade

#restore conf files
logrotate.d/apache
apache2.conf

#reinstall perl modules
cpan Apache::DBI DBD::Pg Apache::Session Apache::Session::Postgres 
Apache2::Request Apache2::RequestIO Apache2::RequestRec Apache2::SubRequest 
Apache2::Response Apache2::Filter Apache2::Cookie Apache2::Connection 
APR::Table CGI::Cookie URI::Escape DBD::SQLite 

#upgrade postgres
apt-get install postgresql postgresql-client postgresql-plperl-9.1 
postgresql-doc 

#comment ssl=true in /etc/postgresql/9.1/main/apache2.conf
#edit pg_hba.conf
#local   all             all                                     peer           
                                                                                
                              
local   all             all                                     trust

#vérifier que ça tourne
psql -V

#restore from dumpall
psql -f 8.4.out postgres

#run update-grub
#reboot



-- 
                                        Regards, Vincent Veyron 

http://libremen.com/ 
Legal case, contract and insurance claim management software


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