How to convert 180 Hudson servers to Jenkins

1. HIPP2JIPP
How to convert 180 Hudson servers to Jenkins
Frederic Gurr (Eclipse Foundation)

2. How did we get here?
2004/06 - Hudson is created by Kohsuke Kawaguchi at Sun Microsystems
2010/01 - Oracle acquires Sun
2010/12 - Hudson project wants to make infrastructure changes
Oracle claims to own the “Hudson” name/brand
2011/01 - Hudson community votes and decides to GTFO
“forks” (renames Hudson to Jenkins)
2011/05 - Oracle donates Hudson project assets to the Eclipse Foundation
Hudson becomes the default CI server for Eclipse projects
2016/02 - Last patch for Hudson is released (version 3.3.3)
2017/01 - No new HIPPs get provisioned @ Eclipse Foundation

3. Same same, but different
● Hudson and Jenkins stayed compatible for a while
● Hudson was IP-cleaned
● Refactorings on both sides
● Hudson and Jenkins became incompatible
● Some Jenkins plug-ins were downported to Hudson
● Special Hudson features

4. HIPP2JIPP java tool
● Found a post in Jenkins-CI Users Google group
● Little XSLT tool (unpolished code)
● Cleaned up the XSL transformation
● Added basic XMLUnit tests
● GitHub project: https://github.com/eclipse/hipp2jipp

5. DEMO

6. Status quo
● 137 HIPPs, 47 JIPPs, 184 total
● 23 HIPPs migrated to Jenkins
● Manual checks are still required during the migration

7. Future plans
● Support for migrating views and nodes (slaves)
● (Almost) fully automatized migration

8. Thanks
HIPP2JIPP tool:
https://github.com/eclipse/hipp2jipp