Jenkins and ZFS on Linux and FreeBSD

[Craig Rodrigues]

Hi,

At JUC 2013, Kohsuke gave this presentation:

http://www.slideshare.net/kohsuke/jenkins-user-conference-2013-literate-multibranch-mobile-and-more

On slide 37, he mentioned ZFS on Linux.

In the Jenkins core, code there is code to access ZFS functionality

in libzfs.  From the pom.xml, there is this:

   <dependency>
      <groupId>org.jvnet.libzfs</groupId>
      <artifactId>libzfs</artifactId>
      <version>0.5</version>
    </dependency>

and in the jenkins core code there is:

./src/main/java/hudson/os/solaris/ZFSProvisioner.java
./src/main/java/hudson/os/solaris/ZFSInstaller.java

It looks like the ZFS functionality is unavailable by default on all platforms

except for Solaris due to this code:

https://github.com/jenkinsci/jenkins/blob/master/core/src/main/java/hudson/os/solaris/ZFSInstaller.java#L99

    private boolean shouldBeActive() {
        if(!System.getProperty("os.name").equals("SunOS") || disabled)
            // on systems that don't have ZFS, we don't need this monitor
            return false;
.
.
.
    /**
     * Escape hatch in case JNI calls fatally crash, like in HUDSON-3733.
     */
    public static boolean disabled = Boolean.getBoolean(ZFSInstaller.class.getName()+".disabled");

I tested booted a SmartOS (Illumos) image and ran Jenkins under it, and

saw that ZFS functionality was enabled by default.

So, when you ran this stuff, under Linux, did you hack the above code

so that it would work with ZFS on Linux, or did you start Jenkins

with the hudson.os.solaris.ZFSInstaller.disabled System property set to false

when starting the JVM on Linux?

With OpenZFS, ZFS is now available on other platforms besides Solaris

(such as FreeBSD), so I'd like to get this working on something besides Solaris.

Thanks.

--

Craig