Jenkins

Introduction

Jenkins is a freeware java code build system that the Scientific Computing Division is maintaining for the experiments. It runs on several powerful build machines where the code can be built using significant parallelism. It also has many useful management features. You can browse the Jenkins system. and docs for code managers. Jenkins manages and runs build scripts, triggers, archiving and reports, but the actual compilation with scons is black box to Jenkins.

Anyone can view the Jenkins pages, but to edit the pages you need to put in a ticket to get edit permissions in Jenkins, then authorize yourself to the site with a certificate. To edit, the Jenkins page should have your username at the top right. If it says "anonymous", try deleting your "buildmaster" cookies, restarting the browser, check that your cert is loaded in the browser, and try again.

Running Projects

mu2e has these Jenkins projects:

1. mu2e-offline-build for building a tag of the offline code and producing tarballs suitable for moving the build to a code disk.
2. mu2e-offline-ci runs every hour and if there was a recent git commit, then run a build which the developers can check for errors.
3. mu2e-offline-geant-int builds every night to check that the future version of geant is still integrated
4. mu2e-ci-branch build a subset of branches as soons as they have new commits, and pushes the build to /cvmfs/mu2e-development

Most are driven by a set of scripts kept in the codetools repository and UPS product.

Release build

The release build is triggered by hand when a new tag is ready.

1. log onto Jenkins system. To do this procedure, you will need to be identified to Jenkins by a cert loaded in your browser before you visit the site. The Jenkins page should have your username at the top right. If it says "anonymous", you are not authenticated.
2. browse to mu2e tab then mu2e-offline-build project
3. click in "build with parameters"
4. enter the tag name and click "build"
5. Check logs by clicking on one of the status balls, then "last build" then "console output".
6. Pull the releases to the code disk using CVMFS instructions (there is a script which can fetch from jenkins)
7. If the tarball is needed for remote distribution, that can be added to the procedure, or it can be retrieved by hand from Jenkins - click into the build and there will be a link to the tarball.

Integration build

Once an hour, jenkin will check if there has been a new commit to our main git repository and if there was, it will run the mu2e-offline-ci project. This project builds prof and debug from the head. If the build fails, mail will be sent to the person who made the commit. You can also check the results by browsing the Jenkins system. Go to the "mu2e" tab, the "mu2e-offline-ci" project. If the balls are pulsing, the build is still running. If green, the build was clean. If red, then the build failed. Click on one of the builds, then "last build", then "console output" to see the log file.

Continuous Integration Project

The computing division has written a set of scripts to run inside Jenkins and give additions features, such as timelines, to the build steps. This is called the Continuous Integration Project. We do not use this service at this time.

Trigger by URL

Projects can be kicked off by POST'ing a url with curl.

curl  -X POST "https://buildmaster.fnal.gov/buildmaster/view/mu2e/job/mu2e-BTrk-build/buildWithParameters?token=02345&PACKAGE_VERSION=v1_02_04&COMPILER=e14"

You can get the token (a kind of password) from the configure page. The parameters are also defined on the configure page.

Pushing a cert

To retrieve a file using a cert. Export your CILogon cert as a .p12 file and note the password. Then

openssl pkcs12 -in cilogon.p12 -out file.key.pem -nocerts -nodes
openssl pkcs12 -in cilogon.p12 -out file.crt.pem -clcerts -nokeys    
curl -O -E ./file.crt.pem --key ./file.key.pem \
https://buildmaster.fnal.gov/buildmaster/view/Art/job/build-mu-dist/BUILDTYPE=debug,label1=swarm,label2=SLF6/lastSuccessfulBuild/artifact/copyBack/cetlib-3.01.03-slf6-x86_64-e15-debug.tar.bz2

Push a cert with a url that triggers a project, so the jenkins project can use it.

# I assume that X509_USER_PROXY points to an existing proxy path
# in the 'mu2e' Jenkins project used in the link below you need
# to define a "Password Parameter" variable named: MU2E_CREDENTIAL


# on your local node:

~~~8<~~~~~~~~~~~~~~~~~~~~~~~~~
credbits="MU2E_CREDENTIAL@$X509_USER_PROXY"

val2="value2"

curl -f \
--data-urlencode "token=1234" \
--data-urlencode "var1=value1" \
--data-urlencode "var2=$val2" \
--data-urlencode "$credbits" \
https://buildmaster.fnal.gov/job/mu2e/buildWithParameters
~~~8<~~~~~~~~~~~~~~~~~~~~~~~~~

# I assume your Jenkins project is named "mu2e", replace that bit for different Jenkins projects
# var1 and var2 need to be defined in the Jenkins configuration to be able to retrieve their value
within a Jenkins job

# In your Jenkins job script to retrieve the proxy you can do the following:
~~~8<~~~~~~~~~~~~~~~~~~~~~~~~~

export X509_USER_PROXY=/tmp/$$.proxy

rm -fv $X509_USER_PROXY
touch $X509_USER_PROXY
chmod 0600  $X509_USER_PROXY
echo "${MU2E_CREDENTIAL}" > $X509_USER_PROXY

voms-proxy-info -all

~~~8<~~~~~~~~~~~~~~~~~~~~~~~~~