Jenkins ant script to loop and stop servers

I built this when we needed Jenkins to stop a rolling set of servers before deploying — loop through each hostname, SSH in, run the stop command. The profile-based hostname list means you can have different server sets for dev, staging, and prod without changing the script. Source is on GitHub if you want the full working example.

• Script to disable logging

<script language="javascript">
    var logger = project.getBuildListeners( ).firstElement( );
    logger.setMessageOutputLevel( 0 );
</script>

• Call target from pom.xml

<configuration>
    <target>
        <ant antfile="${basedir}/build.xml">
            <target name="deploy" />
        </ant>
    </target>
</configuration>

• Setup profile and add servers for that environment

<profile>
    <id>dev</id>
    <properties>
        <classifier.type>DEV</classifier.type>
        <server1.hostname>server1</server1.hostname>
        <server2.hostname>server2</server2.hostname>
        <server3.hostname>server3</server3.hostname>
    </properties>
</profile>

• Ant Loop command

<for list="${sorted.hostnames}" param="hostname">
</for>

• Ant ssh and execute commands on remote

<sshexec 
    host="${node}"
    username="server" 
    password="${server.password}"
    command=". .bash_profile;
            server stop;"
    trust="true" />

Source