JenkinsHowto < IGIRelease

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---+!! How to add new JENKINS slave nodes (clients)

%TOC%

---++ Set up the jenkins user on the client node
   * Create the user =jenkins= on the node
---++ Passwordless ssh from jenkins server configuration
   * If not already done, on the jenkins server enter =ssh-keygen -t rsa= without specifying a password as user jenkins
---++ Passwordless ssh from jenkins client configuration
   * =mkdir /home/jenkins/.ssh=
   * =chmod 700 /home/jenkins/.ssh/=
   * =vim .ssh/authorized_keys= (<< copy here the content of =cat .ssh/id_rsa.pub= run on jenkins server home)
   * =chmod 640 .ssh/authorized_keys=
   * =service sshd restart (as root)=    

---++ Create the node in Jenkins
   * Point your browser to the jenkins instance: =http://ci-01.cnaf.infn.it:8080/=
   * Log in as admin and go to =Configura Jenkins -> Gestisci nodi=
   * Go to =New Node=
   * Insert node name and select the =Copy existing node= radio button. Specify the node to be copied eg. =ci-02=
   * Modify the following fields according to your desiderata: =Name=, =Description=, =Labels (important for triggering builds on this node)=, =Host=
   * Click on the Save button
   * The user which performs ssh (jenkins) is already specified. If the node is created from scratch this is another option to be specified. 

In order to trigger a build on the already created node, specify the corresponding label in the build options. 
---++ Enable package deployment to nexus
In order to publish artifacts in nexus, it is necessary to define a file on each build node under the jenkins user home directory. The file is ~jenkins/.m2/settings.xml and the content should be the following:
<verbatim>
<settings>
  <servers>
    <server>
      <id>sonatype-nexus-staging</id>
      <username>jenkins</username>
      <password>***</password>
    </server>
  </servers>
</settings>
</verbatim>
The id is the one that must be specified in the pom.xml section for the deployment.
---++ Install build packages
These packages are considered the minimum build environment. Install them on the slave node.
<verbatim>
cmake bash bzip2 coreutils cpio diffutils fedora-release findutils gawk gcc gcc-c++ grep gzip info make patch redhat-rpm-config rpm-build sed shadow-utils tar unzip util-linux which xz
</verbatim>
and
<verbatim>
boost boost-devel createrepo maven (for java pacakges)
</verbatim>
Topic revision: r6 - 2013-11-21 - CristinaAiftimiei
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