Cloudbees dev cloud + Postgresql + rubygems pg (native extension) how to use? - postgresql

Question

I want to use postgres in cloudbees dev cloud, I read this article:
http://wiki.cloudbees.com/bin/view/DEV/PostgreSQL
But, I run bundle, I got error:
Installing pg (0.15.1) .......
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native
extension.
/usr/bin/ruby extconf.rb checking for pg_config... no No pg_config... trying anyway. If building fails, please try again with
--with-pg-config=/path/to/pg_config checking for libpq-fe.h... no Can't find the 'libpq-fe.h header
* extconf.rb failed * Could not create Makefile due to some reason, probably lack of necessary libraries and/or headers. Check
the mkmf.log file for more details. You may need configuration
options.
Provided configuration options: --with-opt-dir --without-opt-dir
--with-opt-include --without-opt-include=${opt-dir}/include
--with-opt-lib --without-opt-lib=${opt-dir}/ --with-make-prog
--without-make-prog --srcdir=. --curdir --ruby=/usr/bin/ruby
--with-pg --without-pg --with-pg-dir --without-pg-dir
--with-pg-include --without-pg-include=${pg-dir}/include
--with-pg-lib --without-pg-lib=${pg-dir}/ --with-pg-config
--without-pg-config --with-pg_config --without-pg_config
Gem files will remain installed in
/home/jenkins/.gem/ruby/1.9.1/gems/pg-0.15.1 for inspection. Results
logged to
/home/jenkins/.gem/ruby/1.9.1/gems/pg-0.15.1/ext/gem_make.out An error
occurred while installing pg (0.15.1), and Bundler cannot continue.
Make sure that gem install pg -v '0.15.1' succeeds before bundling.
What do I do next?

Answer 1

There are two approaches to resolving this:
1) Use the workaround above, by adding
PATH=/scratch/jenkins/postgresqls/postgresql-9.2.4-x86_64/bin:$PATH
This is not ideal as we are just about to move that path to support pull-request builds
2) Combine the two steps
In your build you will need to combine the PostgreSQL and Ruby installation steps so that the environment is configured properly.
I personally recommend using a script to do the build - ./bin/run-ci - as opposed to typing everything into Jenkins.
This keeps your build process change controlled and documented - and lets you roll out changes across multiple build servers quite rapidly.

Answer 2

I use single shell script, and I declare once at the top:
export POSTGRESQL_VERSION=9.2.4
curl -s -o use-postgresql https://repository-cloudbees.forge.cloudbees.com/distributions/ci-addons/postgresql/use-postgresql
source ./use-postgresql
Then I don't necessary pass environment variables between shells.

Answer 3

My work around:
Set PATH above bundle, and 9.2.4 is my installing version.
PATH=/scratch/hudson/postgresqls/postgresql-9.2.4-x86_64/bin:$PATH
Then I can bundle completed :)