Restraint parses a sub-set of the Beaker job XML . Here is an example showing just the elements required for running in the stand-alone configuration.
<job> <recipeSet> <recipe> <task name="/kernel/performance/fs_mark" keepchanges="yes"> <fetch url="git://fedorapeople.org/home/fedora/bpeck/public_git/tests.git?master#kernel/performance/fs_mark" /> <params> <param name="foo" value="bar"/> </params> </task> . . . <task name="/kernel/foo/checker"> <rpm name="rh-tests-kernel-foo-checker"/> </task> </recipe> </recipeSet> </job>
For reporting purposes it is a good idea to name your tasks. For git tasks we have settled on a standard where we use the sub-directory path from our git repo as the task name. You can see that in the following example.
This name will be used when reporting on the status of the task and when reporting results.
Restraint supports role assignment for tasks or whole recipes for use in multi-host jobs.
<job> <recipeSet> <recipe role="SERVERS"> <task name="/kernel/filesystems/nfs/connectathon-mh"> <fetch url="git://fedorapeople.org/home/fedora/bpeck/public_git/tests.git?master#kernel/filesystems/nfs/connectathon-mh" /> </task> </recipe> <recipe> <task name="/kernel/filesystems/nfs/connectathon-mh" role="CLIENTS"> <fetch url="git://fedorapeople.org/home/fedora/bpeck/public_git/tests.git?master#kernel/filesystems/nfs/connectathon-mh" /> </task> </recipe> </recipeSet> </job>
The above example results in environment variables “SERVERS” and “CLIENTS” containing hostnames assigned to corresponding recipes. The variables will be available only to tasks with the same padding within recipes.
Recipe roles function as default roles for tasks that have no role specified and can be overridden by task roles.
Apart from role env variables Restraint also exports 2 more hostname-related variables:
- RECIPE_MEMBERS - contains hostnames of all hosts within current recipeSet.
- JOB_MEMBERS - contains hostnames of all hosts in current job.
Keeping Your Task Changes Intact¶
By default Restraint will fetch tasks every time you run a recipe overwriting any changes you’ve done locally. This is not desirable in some cases, e.g. when debugging a test. Restraint provides the ability to keep local changes by setting task property “keepchanges” to “yes” in the job xml.
<task name="/kernel/performance/fs_mark" keepchanges="yes">
The above example shows that you can install tasks directly from git or from an RPM in a yum repo.
The first example shows fetching a task from git.
<fetch url="git://fedorapeople.org/home/fedora/bpeck/public_git/tests.git?master#kernel/performance/fs_mark" /> OR <fetch ssl_verify="off" url="https://fedorapeople.org/cgit/bpeck/public_git/tests.git/snapshot/tests-master.tar.gz#kernel/performance/fs_mark" />
The fetch node accepts git URI’s that conform to the following:
- Prefixed with git:// OR use tarballs with http:// and cgit can serve them automatically.
- The fully qualified hostname. Remember that the system running restraintd must be able to reach this host.
- The path to the git repo.
- Optionally you can specify a valid reference which can be a branch, tag or SHA-1. ie: ?master
- Optionally you can specify a sub-dir. Restraint will only extract this sub-dir and run the task from here. ie: #kernel/performance/fs_mark. Notice that there is not a preceding slash here.
- If you need to disable SSL certificate checking you can set ssl_verify parameter to “off”.
Restraint uses git’s archive protocol to retrieve the contents so make sure your git server has enabled this. You can enable this on most servers by putting the following in your git repo config
The second example will attempt to install the task via yum/rpm.
Currently Restraint does not attempt to set up any repos that you may have specified in your job.xml. This means that in order for it to install the above task you must have already configured the task repo on the machine running restraintd.
You can optionally pass parameters to a task via environment variables. The following snippet from our example would create an environment variable named ‘foo’ with the value ‘bar’.
<params> <param name="foo" value="bar"/> </params>
The parameter RSTRNT_MAX_TIME allows you to specify a different max time than what is specified in the tasks metadata. Setting KILLTIMEOVERRIDE also has the same effect and is provided for compatibility with legacy RHTS (Red Hat Test System).
The parameter RSTRNT_USE_PTY allows you to either enable or disable using a pty
for task execution. Use
true to enable and
false to disable. Setting
this value in the job will override the settings in metadata or testinfo.desc.
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