Days of …

I decided to save Hudson configs to Subversion repository just in case something goes wrong with the server later and would need to restore all projects. A bit of googling first, found that there are plugins to to a backup of workplaces and configs. But why would I need to have them? I am on Solaris, so I can create the same by my own hands. Here are my requirements:

1. Backup should be a job within Hudson – since Hudson is a best cron you could find and I already have it
2. Backup should automatically discover added jobs and add then into Subversion – thus I will forget about it forever, no maintenance required

Simples! So I created a custom build job within Hudson, pointed it to a Subversion location, where I will store backups and backup shell script, which will gather all Hudson configs and deal with Subversion. I told Hudson that I don’t want to create subfolder for a project within its workplace. Then I set to execute script this way: ${WORKPLACE}/hudsonbackup.sh Here is the script itself:

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#!/bin/bash
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SRC_FOLDER=${WORKSPACE}
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SVN_PARAMS="--config-dir /.subversion/ --non-interactive --trust-server-cert --username f_tc_ci1 --password *****"
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SVN_COMMAND="/opt/csw/bin/svn"
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JOBS=`ls -al /.hudson/jobs/|grep -v job1|grep -v job2|awk ' NR>3 {print $9}'`
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CURR_FOLDER=`pwd`
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echo "Copying Hudson configs"
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cp /.hudson/*.xml ${SRC_FOLDER}
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echo "Done."
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cd ${SRC_FOLDER}
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echo "Processing Hudson jobs"
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for JOB in ${JOBS}
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do
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  echo "Processing ${JOB}"
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  if [ ! -e ${JOB} ]
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  then
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    echo "New job. Creating folder and adding it to SVN"
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    mkdir  ${JOB}
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    ${SVN_COMMAND} add ${SVN_PARAMS} ${JOB}    
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    SVN_COMMENT="${SVN_COMMENT} Added ${JOB}"
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  fi  
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  echo "Saving ${JOB}/config.xml"
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  if [ -e ${JOB}/.svn ]
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  then
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    if [ -e ${JOB}/config.xml ]
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    then
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      # config.xml already exist - don't need to add it to subversion
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      cp /.hudson/jobs/${JOB}/config.xml ${JOB}/
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    else
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      echo "New job - new config.xml"
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      cp /.hudson/jobs/${JOB}/config.xml ${JOB}/
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      ${SVN_COMMAND} add ${SVN_PARAMS} ${JOB}/config.xml
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    fi
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  else
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    echo "Problem creating and adding folder to Subversion"
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    exit 1
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  fi
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done
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echo "Job processing is done. Committing..."
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${SVN_COMMAND} ci ${SVN_PARAMS} -m "Config saved by Hudson. ${SVN_COMMENT}"
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echo "All done."

Note 1: My Subversion is on HTTPS server with the self-signed certificate, so I have to tell Subversion client to trust it explicitly. Its on line 4. On line 5 I constructed the path to Subversion client because Hudson executing shell scripts with quite limited PATH. Note 2: I need to ignore some jobs, so I added them on line 6. Also on this line I have hardcoded Hudson location (“/.hudson”) – it needs to be changed if your Hudson somewhere else. After all that I set this job to execute daily. It works!