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+ font-style: oblique } + +span.classifier-delimiter { + font-family: sans-serif ; + font-weight: bold } + +span.interpreted { + font-family: sans-serif } + +span.option { + white-space: nowrap } + +span.pre { + white-space: pre } + +span.problematic { + color: red } + +span.section-subtitle { + /* font-size relative to parent (h1..h6 element) */ + font-size: 80% } + +table.citation { + border-left: solid 1px gray; + margin-left: 1px } + +table.docinfo { + margin: 2em 4em } + +table.docutils { + margin-top: 0.5em ; + margin-bottom: 0.5em } + +table.footnote { + border-left: solid 1px black; + margin-left: 1px } + +table.docutils td, table.docutils th, +table.docinfo td, table.docinfo th { + padding-left: 0.5em ; + padding-right: 0.5em ; + vertical-align: top } + +table.docutils th.field-name, table.docinfo th.docinfo-name { + font-weight: bold ; + text-align: left ; + white-space: nowrap ; + padding-left: 0 } + +/* "booktabs" style (no vertical lines) */ +table.docutils.booktabs { + border: 0px; + border-top: 2px solid; + border-bottom: 2px solid; + border-collapse: collapse; +} +table.docutils.booktabs * { + border: 0px; +} +table.docutils.booktabs th { + border-bottom: thin solid; + text-align: left; +} + +h1 tt.docutils, h2 tt.docutils, h3 tt.docutils, +h4 tt.docutils, h5 tt.docutils, h6 tt.docutils { + font-size: 100% } + +ul.auto-toc { + list-style-type: none } + +</style> +</head> +<body> +<div class="document"> + + +<div class="section" id="revamp-of-automatic-virtualbox-testing"> +<h1>Revamp of Automatic VirtualBox Testing</h1> +<div class="section" id="introduction"> +<h2>Introduction</h2> +<p>This is the design document for a revamped automatic testing framework. +The revamp aims at replacing the current tinderbox based testing by a new +system that is written from scratch.</p> +<p>The old system is not easy to work with and was never meant to be used for +managing tests, after all it just a simple a build manager tailored for +contiguous building. Modifying the existing tinderbox system to do what +we want would require fundamental changes that would render it useless as +a build manager, it would therefore end up as a fork. The amount of work +required would probably be about the same as writing a new system from +scratch. Other considerations, such as the license of the tinderbox +system (MPL) and language it is realized in (Perl), are also in favor of +doing it from scratch.</p> +<p>The language envisioned for the new automatic testing framework is Python. This +is for several reasons:</p> +<blockquote> +<ul class="simple"> +<li>The VirtualBox API has Python bindings.</li> +<li>Python is used quite a bit inside Sun (dunno about Oracle).</li> +<li>Works relatively well with Apache for the server side bits.</li> +<li>It is more difficult to produce write-only code in Python (alias the +we-don't-like-perl argument).</li> +<li>You don't need to compile stuff.</li> +</ul> +</blockquote> +<p>Note that the author of this document has no special training as a test +engineer and may therefore be using the wrong terms here and there. The +primary focus is to express what we need to do in order to improve +testing.</p> +<p>This document is written in reStructuredText (rst) which just happens to +be used by Python, the primary language for this revamp. For more +information on reStructuredText: <a class="reference external" href="http://docutils.sourceforge.net/rst.html">http://docutils.sourceforge.net/rst.html</a></p> +</div> +</div> +<div class="section" id="definitions-glossary"> +<h1>Definitions / Glossary</h1> +<dl class="docutils"> +<dt>sub-test driver</dt> +<dd>A set of test cases that can be used by more than one test driver. Could +also be called a test unit, in the pascal sense of unit, if it wasn't so +easily confused with 'unit test'.</dd> +<dt>test</dt> +<dd>This is somewhat ambiguous and this document try avoid using it where +possible. When used it normally refers to doing testing by executing one or +more testcases.</dd> +<dt>test case</dt> +<dd>A set of inputs, test programs and expected results. It validates system +requirements and generates a pass or failed status. A basic unit of testing. +Note that we use the term in a rather broad sense.</dd> +<dt>test driver</dt> +<dd>A program/script used to execute a test. Also known as a test harness. +Generally abbreviated 'td'. It can have sub-test drivers.</dd> +<dt>test manager</dt> +<dd>Software managing the automatic testing. This is a web application that runs +on a dedicated server (tindertux).</dd> +<dt>test set</dt> +<dd>The output of testing activity. Logs, results, ++. Our usage of this should +probably be renamed to 'test run'.</dd> +<dt>test group</dt> +<dd>A collection of related test cases.</dd> +<dt>testbox</dt> +<dd>A computer that does testing.</dd> +<dt>testbox script</dt> +<dd>Script executing orders from the test manager on a testbox. Started +automatically upon bootup.</dd> +<dt>testing</dt> +<dd>todo</dd> +<dt>TODO: Check that we've got all this right and make them more exact</dt> +<dd>where possible.</dd> +</dl> +<p>See also <a class="reference external" href="http://encyclopedia2.thefreedictionary.com/testing%20types">http://encyclopedia2.thefreedictionary.com/testing%20types</a> +and <a class="reference external" href="http://www.aptest.com/glossary.html">http://www.aptest.com/glossary.html</a> .</p> +</div> +<div class="section" id="objectives"> +<h1>Objectives</h1> +<blockquote> +<ul class="simple"> +<li>A scalable test manager (>200 testboxes).</li> +<li>Optimize the web user interface (WUI) for typical workflows and analysis.</li> +<li>Efficient and flexibile test configuration.</li> +<li>Import test result from other test systems (logo testing, VDI, ++).</li> +<li>Easy to add lots of new testscripts.</li> +<li>Run tests locally without a manager.</li> +<li>Revamp a bit at the time.</li> +</ul> +</blockquote> +</div> +<div class="section" id="the-testbox-side"> +<h1>The Testbox Side</h1> +<p>Each testbox has a unique name corresponding to its DNS zone entry. When booted +a testbox script is started automatically. This script will query the test +manager for orders and execute them. The core order downloads and executes a +test driver with parameters (configuration) from the server. The test driver +does all the necessary work for executing the test. In a typical VirtualBox +test this means picking a build, installing it, configuring VMs, running the +test VMs, collecting the results, submitting them to the server, and finally +cleaning up afterwards.</p> +<p>The testbox environment which the test drivers are executed in will have a +number of environment variables for determining location of the source images +and other test data, scratch space, test set id, server URL, and so on and so +forth.</p> +<p>On startup, the testbox script will look for crash dumps and similar on +systems where this is possible. If any sign of a crash is found, it will +put any dumps and reports in the upload directory and inform the test +manager before reporting for duty. In order to generate the proper file +names and report the crash in the right test set as well as prevent +reporting crashes unrelated to automatic testing, the testbox script will +keep information (test set id, ++) in a separate scratch directory +(${TESTBOX_PATH_SCRATCH}/../testbox) and make sure it is synced to the +disk (both files and directories).</p> +<p>After checking for crashes, the testbox script will clean up any previous test +which might be around. This involves first invoking the test script in cleanup +mode and the wiping the scratch space.</p> +<p>When reporting for duty the script will submit information about the host: OS +name, OS version, OS bitness, CPU vendor, total number of cores, VT-x support, +AMD-V support, amount of memory, amount of scratch space, and anything else that +can be found useful for scheduling tests or filtering test configurations.</p> +<div class="section" id="testbox-script-orders"> +<h2>Testbox Script Orders</h2> +<p>The orders are kept in a queue on the server and the testbox script will fetch +them one by one. Orders that cannot be executed at the moment will be masked in +the query from the testbox.</p> +<dl class="docutils"> +<dt>Execute Test Driver</dt> +<dd>Downloads and executes the a specified test driver with the given +configuration (arguments). Only one test driver can be executed at a time. +The server can specify more than one ZIP file to be downloaded and unpacked +before executing the test driver. The testbox script may cache these zip +files using http time stamping.</dd> +<dt>Abort Test Driver</dt> +<dd>Aborts the current test driver. This will drop a hint to the driver and give +it 60 seconds to shut down the normal way. If that fails, the testbox script +will kill the driver processes (SIGKILL or equivalent), invoke the +testdriver in cleanup mode, and finally wipe the scratch area. Should either +of the last two steps fail in some way, the testbox will be rebooted.</dd> +<dt>Idle</dt> +<dd>Ask again in X seconds, where X is specified by the server.</dd> +<dt>Reboot</dt> +<dd>Reboot the testbox. If a test driver is current running, an attempt at +aborting it (Abort Test Driver) will be made first.</dd> +<dt>Update</dt> +<dd>Updates the testbox script. The order includes a server relative path to the +new testbox script. This can only be executed when no test driver is +currently being executed.</dd> +</dl> +</div> +<div class="section" id="testbox-environment-variables"> +<h2>Testbox Environment: Variables</h2> +<dl class="docutils"> +<dt>COMSPEC</dt> +<dd>This will be set to C:WindowsSystem32cmd.exe on Windows.</dd> +<dt>PATH</dt> +<dd>This will contain the kBuild binary directory for the host platform.</dd> +<dt>SHELL</dt> +<dd>This will be set to point to kmk_ash(.exe) on all platforms.</dd> +<dt>TESTBOX_NAME</dt> +<dd>The testbox name. +This is not required by the local reporter.</dd> +<dt>TESTBOX_PATH_BUILDS</dt> +<dd>The absolute path to where the build repository can be found. This should be +a read only mount when possible.</dd> +<dt>TESTBOX_PATH_RESOURCES</dt> +<dd>The absolute path to where static test resources like ISOs and VDIs can be +found. The test drivers knows the layout of this. This should be a read only +mount when possible.</dd> +<dt>TESTBOX_PATH_SCRATCH</dt> +<dd>The absolute path to the scratch space. This is the current directory when +starting the test driver. It will be wiped automatically after executing the +test. +(Envisioned as ${TESTBOX_PATH_SCRIPTS}/../scratch and that +${TESTBOX_PATH_SCRATCH}/ will be automatically wiped by the testbox script.)</dd> +<dt>TESTBOX_PATH_SCRIPTS</dt> +<dd>The absolute path to the test driver and the other files that was unzipped +together with it. This is also where the test-driver-abort file will be put. +(Envisioned as ${TESTBOX_PATH_SCRATCH}/../driver, see above.)</dd> +<dt>TESTBOX_PATH_UPLOAD</dt> +<dd>The absolute path to the upload directory for the testbox. This is for +putting VOBs, PNGs, core dumps, crash dumps, and such on. The files should be +bzipped or zipped if they aren't compress already. The names should contain +the testbox and test set ID.</dd> +<dt>TESTBOX_REPORTER</dt> +<dd>The name of the test reporter back end. If not present, it will default to +the local reporter.</dd> +<dt>TESTBOX_TEST_SET_ID</dt> +<dd>The test set ID if we're running. +This is not required by the local reporter.</dd> +<dt>TESTBOX_MANAGER_URL</dt> +<dd>The URL to the test manager. +This is not required by the local reporter.</dd> +<dt>TESTBOX_XYZ</dt> +<dd>There will probably be some more of these.</dd> +</dl> +</div> +<div class="section" id="testbox-environment-core-utilities"> +<h2>Testbox Environment: Core Utilities</h2> +<p>The testbox will not provide the typical unix /bin and /usr/bin utilities. In +other words, cygwin will not be used on Windows!</p> +<p>The testbox will provide the unixy utilties that ships with kBuild and possibly +some additional ones from tools/<em>.</em>/bin in the VirtualBox tree (wget, unzip, +zip, and so on). The test drivers will avoid invoking any of these utilites +directly and instead rely on generic utility methods in the test driver +framework. That way we can more easily reimplement the functionality of the +core utilites and drop the dependency on them. It also allows us to quickly +work around platform specific oddities and bugs.</p> +</div> +<div class="section" id="test-drivers"> +<h2>Test Drivers</h2> +<p>The test drivers are programs that will do the actual testing. In addition to +run under the testbox script, they can be executed in the VirtualBox development +environment. This is important for bug analysis and for simplifying local +testing by the developers before commiting changes. It also means the test +drivers can be developed locally in the VirtualBox development environment.</p> +<p>The main difference between executing a driver under the testbox script and +running it manually is that there is no test manager in the latter case. The +test result reporter will not talk to the server, but report things to a local +log file and/or standard out/err. When invoked manually, all the necessary +arguments will need to be specified by hand of course - it should be possible +to extract them from a test set as well.</p> +<p>For the early implementation stages, an implementation of the reporter interface +that talks to the tinderbox base test manager will be needed. This will be +dropped later on when a new test manager is ready.</p> +<p>As hinted at in other sections, there will be a common framework +(libraries/packages/classes) for taking care of the tedious bits that every +test driver needs to do. Sharing code is essential to easing test driver +development as well as reducing their complexity. The framework will contain:</p> +<blockquote> +<ul> +<li><p class="first">A generic way of submitting output. This will be a generic interface with +multiple implementation, the TESTBOX_REPORTER environment variable +will decide which of them to use. The interface will have very specific +methods to allow the reporter to do a best possible job in reporting the +results to the test manager.</p> +</li> +<li><dl class="first docutils"> +<dt>Helpers for typical tasks, like:</dt> +<dd><ul class="first last simple"> +<li>Copying files.</li> +<li>Deleting files, directory trees and scratch space.</li> +<li>Unzipping files.</li> +<li>Creating ISOs</li> +<li>And such things.</li> +</ul> +</dd> +</dl> +</li> +<li><p class="first">Helpers for installing and uninstalling VirtualBox.</p> +</li> +<li><p class="first">Helpers for defining VMs. (The VBox API where available.)</p> +</li> +<li><p class="first">Helpers for controlling VMs. (The VBox API where available.)</p> +</li> +</ul> +</blockquote> +<p>The VirtualBox bits will be separate from the more generic ones, simply because +this is cleaner it will allow us to reuse the system for testing other products.</p> +<p>The framework will be packaged in a zip file other than the test driver so we +don't waste time and space downloading the same common code.</p> +<p>The test driver will poll for the file +${TESTBOX_PATH_SCRIPTS}/test-driver-abort and abort all testing when it sees it.</p> +<p>The test driver can be invoked in three modes: execute, help and cleanup. The +default is execute mode, the help shows an configuration summary and the cleanup +is for cleaning up after a reboot or aborted run. The latter is done by the +testbox script on startup and after abort - the driver is expected to clean up +by itself after a normal run.</p> +</div> +</div> +<div class="section" id="the-server-side"> +<h1>The Server Side</h1> +<p>The server side will be implemented using a webserver (apache), a database +(postgres) and cgi scripts (Python). In addition a cron job (Python) running +once a minute will generate static html for frequently used pages and maybe +execute some other tasks for driving the testing forwards. The order queries +from the testbox script is the primary driving force in the system. The total +makes up the test manager.</p> +<p>The test manager can be split up into three rough parts:</p> +<blockquote> +<ul class="simple"> +<li>Configuration (of tests, testgroups and testboxes).</li> +<li>Execution (of tests, collecting and organizing the output).</li> +<li>Analysis (of test output, mostly about presentation).</li> +</ul> +</blockquote> +</div> +<div class="section" id="test-manager-requirements"> +<h1>Test Manager: Requirements</h1> +<p>List of requirements:</p> +<blockquote> +<ul> +<li><p class="first">Two level testing - L1 quick smoke tests and L2 longer tests performed on +builds passing L1. (Klaus (IIRC) ment this could be realized using +test dependency.)</p> +</li> +<li><p class="first">Black listing builds (by revision or similar) known to be bad.</p> +</li> +<li><p class="first">Distinguish between build types so we can do a portion of the testing with +strict builds.</p> +</li> +<li><p class="first">Easy to re-configure build source for testing different branch or for +testing a release candidate. (Directory based is fine.)</p> +</li> +<li><p class="first">Useful to be able to partition testboxes (run specific builds on some +boxes, let an engineer have a few boxes for a while).</p> +</li> +<li><p class="first">Interation with ILOM/...: reset systems.</p> +</li> +<li><p class="first">Be able to suspend testing on selected testboxes when doing maintance +(where automatically resuming testing on reboot is undesired) or similar +activity.</p> +</li> +<li><p class="first">Abort testing on seleced testboxes.</p> +</li> +<li><p class="first">Scheduling of tests requiring more than one testbox.</p> +</li> +<li><p class="first">Scheduling of tests that cannot be executing concurrently on several +machines because of some global resource like an iSCSI target.</p> +</li> +<li><p class="first">Jump the scheduling queue. Scheduling of specified test the next time a +testbox is available (optionally specifying which testbox to schedule it +on).</p> +</li> +<li><dl class="first docutils"> +<dt>Configure tests with variable configuration to get better coverage. Two modes:</dt> +<dd><ul class="first last simple"> +<li>TM generates the permutations based on one or more sets of test script arguments.</li> +<li>Each configuration permuation is specified manually.</li> +</ul> +</dd> +</dl> +</li> +<li><p class="first">Test specification needs to be flexible (select tests, disable test, test +scheduling (run certain tests nightly), ... ).</p> +</li> +<li><p class="first">Test scheduling by hour+weekday and by priority.</p> +</li> +<li><p class="first">Test dependencies (test A depends on test B being successful).</p> +</li> +<li><p class="first">Historize all configuration data, in particular test configs (permutations +included) and testboxes.</p> +</li> +<li><p class="first">Test sets has at a minimum a build reference, a testbox reference and a +primary log associated with it.</p> +</li> +<li><dl class="first docutils"> +<dt>Test sets stores further result as a recursive collection of:</dt> +<dd><ul class="first last simple"> +<li>hierachical subtest name (slash sep)</li> +<li>test parameters / config</li> +<li>bool fail/succ</li> +<li>attributes (typed?)</li> +<li>test time</li> +<li>e.g. throughput</li> +<li>subresults</li> +<li>log</li> +<li>screenshots, video,...</li> +</ul> +</dd> +</dl> +</li> +<li><p class="first">The test sets database structure needs to designed such that data mining +can be done in an efficient manner.</p> +</li> +<li><p class="first">Presentation/analysis: graphs!, categorize bugs, columns reorganizing +grouped by test (hierarchical), overviews, result for last day.</p> +</li> +</ul> +</blockquote> +</div> +<div class="section" id="test-manager-configuration"> +<h1>Test Manager: Configuration</h1> +<div class="section" id="testboxes"> +<h2>Testboxes</h2> +<p>Configuration of testboxes doesn't involve much work normally. A testbox +is added manually to the test manager by entering the DNS entry and/or IP +address (the test manager resolves the missing one when necessary) as well as +the system UUID (when obtainable - should be displayed by the testbox script +installer). Queries from unregistered testboxes will be declined as a kind of +security measure, the incident should be logged in the webserver log if +possible. In later dealings with the client the System UUID will be the key +identifier. It's permittable for the IP address to change when the testbox +isn't online, but not while testing (just imagine live migration tests and +network tests). Ideally, the testboxes should not change IP address.</p> +<p>The testbox edit function must allow changing the name and system UUID.</p> +<p>One further idea for the testbox configuration is indicating what they are +capable of to filter out tests and test configurations that won't work on that +testbox. To examplify this take the ACP2 installation test. If the test +manager does not make sure the testbox have VT-x or AMD-v capabilities, the test +is surely going to fail. Other testbox capabilities would be total number of +CPU cores, memory size, scratch space. These testbox capabilities should be +collected automatically on bootup by the testbox script together with OS name, +OS version and OS bitness.</p> +<p>A final thought, instead of outright declining all requests from new testboxes, +we could record the unregistered testboxes with ip, UUID, name, os info and +capabilities but mark them as inactive. The test operator can then activate +them on an activation page or edit the testbox or something.</p> +</div> +<div class="section" id="testcases"> +<h2>Testcases</h2> +<p>We use the term testcase for a test.</p> +</div> +<div class="section" id="testgroups"> +<h2>Testgroups</h2> +<p>Testcases are organized into groups. A testcase can be member of more than one +group. The testcase gets a priority assigned to it in connection with the +group membership.</p> +<p>Testgroups are picked up by a testbox partition (aka scheduling group) and a +prioirty, scheduling time restriction and dependencies on other test groups are +associated with the assignment. A testgroup can be used by several testbox +partitions.</p> +<p>(This used to be called 'testsuites' but was renamed to avoid confusion with +the VBox Test Suite.)</p> +</div> +<div class="section" id="scheduling"> +<h2>Scheduling</h2> +<p>The initial scheduler will be modelled after what we're doing already on in the +tinderbox driven testing. It's best described as a best effort continuous +integration scheduler. Meaning, it will always use the latest build suitable +for a testcase. It will schedule on a testcase level, using the combined +priority of the testcase in the test group and the test group with the testbox +partition, trying to spread the test case argument varation out accordingly +over the whole scheduilng queue. Which argument variation to start with, is +not undefined (random would be best).</p> +<p>Later, we may add other schedulers as needed.</p> +</div> +</div> +<div class="section" id="the-test-manager-database"> +<h1>The Test Manager Database</h1> +<p>First a general warning:</p> +<blockquote> +The guys working on this design are not database experts, web +programming experts or similar, rather we are low level guys +who's main job is x86 & AMD64 virtualization. So, please don't +be too hard on us. :-)</blockquote> +<p>A logical table layout can be found in TestManagerDatabaseMap.png (created by +Oracle SQL Data Modeler, stored in TestManagerDatabase.dmd). The physical +database layout can be found in TestManagerDatabaseInit.pgsql postgreSQL +script. The script is commented.</p> +<div class="section" id="data-history"> +<h2>Data History</h2> +<p>We need to somehow track configuration changes over time. We also need to +be able to query the exact configuration a test set was run with so we can +understand and make better use of the results.</p> +<p>There are different techniques for archiving this, one is tuple-versioning +( <a class="reference external" href="http://en.wikipedia.org/wiki/Tuple-versioning">http://en.wikipedia.org/wiki/Tuple-versioning</a> ), another is log trigger +( <a class="reference external" href="http://en.wikipedia.org/wiki/Log_trigger">http://en.wikipedia.org/wiki/Log_trigger</a> ). We use tuple-versioning in +this database, with 'effective' as start date field name and 'expire' as +the end (exclusive).</p> +<p>Tuple-versioning has a shortcomming wrt to keys, both primary and foreign. +The primary key of a table employing tuple-versioning is really +'id' + 'valid_period', where the latter is expressed using two fields +([effective...expire-1]). Only, how do you tell the database engine that +it should not allow overlapping valid_periods? Useful suggestions are +welcomed. :-)</p> +<p>Foreign key references to a table using tuple-versioning is running into +trouble because of the time axsis and that to our knowledge foreign keys +must reference exactly one row in the other table. When time is involved +what we wish to tell the database is that at any given time, there actually +is exactly one row we want to match in the other table, only we've no idea +how to express this. So, many foreign keys are not expressed in SQL of this +database.</p> +<p>In some cases, we extend the tuple-versioning with a generation ID so that +normal foreign key referencing can be used. We only use this for recording +(references in testset) and scheduling (schedqueue), as using it more widely +would force updates (gen_id changes) to propagate into all related tables.</p> +<dl class="docutils"> +<dt>See also:</dt> +<dd><ul class="first last simple"> +<li><a class="reference external" href="http://en.wikipedia.org/wiki/Slowly_changing_dimension">http://en.wikipedia.org/wiki/Slowly_changing_dimension</a></li> +<li><a class="reference external" href="http://en.wikipedia.org/wiki/Change_data_capture">http://en.wikipedia.org/wiki/Change_data_capture</a></li> +<li><a class="reference external" href="http://en.wikipedia.org/wiki/Temporal_database">http://en.wikipedia.org/wiki/Temporal_database</a></li> +</ul> +</dd> +</dl> +</div> +</div> +<div class="section" id="test-manager-execution"> +<h1>Test Manager: Execution</h1> +</div> +<div class="section" id="test-manager-scenarios"> +<h1>Test Manager: Scenarios</h1> +<div class="section" id="testbox-signs-on-at-bootup"> +<h2>#1 - Testbox Signs On (At Bootup)</h2> +<dl class="docutils"> +<dt>The testbox supplies a number of inputs when reporting for duty:</dt> +<dd><ul class="first last simple"> +<li>IP address.</li> +<li>System UUID.</li> +<li>OS name.</li> +<li>OS version.</li> +<li>CPU architecture.</li> +<li>CPU count (= threads).</li> +<li>CPU VT-x/AMD-V capability.</li> +<li>CPU nested paging capability.</li> +<li>Chipset I/O MMU capability.</li> +<li>Memory size.</li> +<li>Scratch size space (for testing).</li> +<li>Testbox Script revision.</li> +</ul> +</dd> +<dt>Results:</dt> +<dd><ul class="first last simple"> +<li>ACK or NACK.</li> +<li>Testbox ID and name on ACK.</li> +</ul> +</dd> +</dl> +<p>After receiving a ACK the testbox will ask for work to do, i.e. continue with +scenario #2. In the NACK case, it will sleep for 60 seconds and try again.</p> +<p>Actions:</p> +<ol class="arabic"> +<li><p class="first">Validate the testbox by looking the UUID up in the TestBoxes table. +If not found, NACK the request. SQL:</p> +<pre class="literal-block"> +SELECT idTestBox, sName +FROM TestBoxes +WHERE uuidSystem = :sUuid + AND tsExpire = 'infinity'::timestamp; +</pre> +</li> +<li><p class="first">Check if any of the information by testbox script has changed. The two +sizes are normalized first, memory size rounded to nearest 4 MB and scratch +space is rounded down to nearest 64 MB. If anything changed, insert a new +row in the testbox table and historize the current one, i.e. set +OLD.tsExpire to NEW.tsEffective and get a new value for NEW.idGenTestBox.</p> +</li> +<li><dl class="first docutils"> +<dt>Check with TestBoxStatuses:</dt> +<dd><ol class="first last loweralpha simple"> +<li>If there is an row for the testbox in it already clean up change it +to 'idle' state and deal with any open testset like described in +scenario #9.</li> +<li>If there is no row, add one with 'idle' state.</li> +</ol> +</dd> +</dl> +</li> +<li><p class="first">ACK the request and pass back the idTestBox.</p> +</li> +</ol> +<dl class="docutils"> +<dt>Note! Testbox.enabled is not checked here, that is only relevant when it asks</dt> +<dd>for a new task (scenario #2 and #5).</dd> +<dt>Note! Should the testbox script detect changes in any of the inputs, it should</dt> +<dd>redo the sign in.</dd> +<dt>Note! In scenario #8, the box will not sign on until it has done the reboot and</dt> +<dd>cleanup reporting!</dd> +</dl> +</div> +<div class="section" id="testbox-asks-for-work-to-do"> +<h2>#2 - Testbox Asks For Work To Do</h2> +<dl class="docutils"> +<dt>Inputs:</dt> +<dd><ul class="first last simple"> +<li>The testbox is supplying its IP indirectly.</li> +<li>The testbox should supply its UUID and ID directly.</li> +</ul> +</dd> +<dt>Results:</dt> +<dd><ul class="first last simple"> +<li>IDLE, WAIT, EXEC, REBOOT, UPGRADE, UPGRADE-AND-REBOOT, SPECIAL or DEAD.</li> +</ul> +</dd> +</dl> +<p>Actions:</p> +<ol class="arabic"> +<li><p class="first">Validate the ID and IP by selecting the currently valid testbox row:</p> +<pre class="literal-block"> +SELECT idGenTestBox, fEnabled, idSchedGroup, enmPendingCmd +FROM TestBoxes +WHERE id = :id + AND uuidSystem = :sUuid + AND ip = :ip + AND tsExpire = 'infinity'::timestamp; +</pre> +<p>If NOT found return DEAD to the testbox client (it will go back to sign on +mode and retry every 60 seconds or so - see scenario #1).</p> +<dl class="docutils"> +<dt>Note! The WUI will do all necessary clean-ups when deleting a testbox, so</dt> +<dd><p class="first last">contrary to the initial plans, we don't need to do anything more for +the DEAD status.</p> +</dd> +</dl> +</li> +<li><p class="first">Check with TestBoxStatuses (maybe joined with query from 1).</p> +<p>If enmState is 'gang-gathering': Goto scenario #6 on timeout or pending +'abort' or 'reboot' command. Otherwise, tell the testbox to WAIT [done].</p> +<p>If enmState is 'gang-testing': The gang has been gathered and execution +has been triggered. Goto 5.</p> +<p>If enmState is not 'idle', change it to 'idle'.</p> +<p>If idTestSet is not NULL, CALL scenario #9 to it up.</p> +<p>If there is a pending abort command, remove it.</p> +<p>If there is a pending command and the old state doesn't indicate that it was +being executed, GOTO scenario #3.</p> +<dl class="docutils"> +<dt>Note! There should be a TestBoxStatuses row after executing scenario #1,</dt> +<dd><p class="first last">however should none be found for some funky reason, returning DEAD +will fix the problem (see above)</p> +</dd> +</dl> +</li> +<li><p class="first">If the testbox was marked as disabled, respond with an IDLE command to the +testbox [done]. (Note! Must do this after TestBoxStatuses maintainance from +point 2, or abandoned tests won't be cleaned up after a testbox is disabled.)</p> +</li> +<li><p class="first">Consider testcases in the scheduling queue, pick the first one which the +testbox can execute. There is a concurrency issue here, so we put and +exclusive lock on the SchedQueues table while considering its content.</p> +<p>The cursor we open looks something like this:</p> +<pre class="literal-block"> +SELECT idItem, idGenTestCaseArgs, + idTestSetGangLeader, cMissingGangMembers +FROM SchedQueues +WHERE idSchedGroup = :idSchedGroup + AND ( bmHourlySchedule is NULL + OR get_bit(bmHourlySchedule, :iHourOfWeek) = 1 ) --< does this work? +ORDER BY ASC idItem; +</pre> +</li> +</ol> +<blockquote> +<p>If there no rows are returned (this can happen because no testgroups are +associated with this scheduling group, the scheduling group is disabled, +or because the queue is being regenerated), we will tell the testbox to +IDLE [done].</p> +<dl class="docutils"> +<dt>For each returned row we will:</dt> +<dd><ol class="first last loweralpha"> +<li><p class="first">Check testcase/group dependencies.</p> +</li> +<li><p class="first">Select a build (and default testsuite) satisfying the dependencies.</p> +</li> +<li><p class="first">Check the testcase requirements with that build in mind.</p> +</li> +<li><p class="first">If idTestSetGangLeader is NULL, try allocate the necessary resources.</p> +</li> +<li><p class="first">If it didn't check out, fetch the next row and redo from (a).</p> +</li> +<li><p class="first">Tentatively create a new test set row.</p> +</li> +<li><dl class="first docutils"> +<dt>If not gang scheduling:</dt> +<dd><ul class="first last simple"> +<li>Next state: 'testing'</li> +</ul> +</dd> +<dt>ElIf we're the last gang participant:</dt> +<dd><ul class="first last simple"> +<li>Set idTestSetGangLeader to NULL.</li> +<li>Set cMissingGangMembers to 0.</li> +<li>Next state: 'gang-testing'</li> +</ul> +</dd> +<dt>ElIf we're the first gang member:</dt> +<dd><ul class="first last simple"> +<li>Set cMissingGangMembers to TestCaseArgs.cGangMembers - 1.</li> +<li>Set idTestSetGangLeader to our idTestSet.</li> +<li>Next state: 'gang-gathering'</li> +</ul> +</dd> +<dt>Else:</dt> +<dd><ul class="first last simple"> +<li>Decrement cMissingGangMembers.</li> +<li>Next state: 'gang-gathering'</li> +</ul> +</dd> +<dt>If we're not gang scheduling OR cMissingGangMembers is 0:</dt> +<dd><p class="first last">Move the scheduler queue entry to the end of the queue.</p> +</dd> +</dl> +<p>Update our TestBoxStatuses row with the new state and test set. +COMMIT;</p> +</li> +</ol> +</dd> +</dl> +</blockquote> +<ol class="arabic" start="5"> +<li><dl class="first docutils"> +<dt>If state is 'testing' or 'gang-testing':</dt> +<dd><p class="first">EXEC reponse.</p> +<p class="last">The EXEC response for a gang scheduled testcase includes a number of +extra arguments so that the script knows the position of the testbox +it is running on and of the other members. This means the that the +TestSet.iGangMemberNo is passed using --gang-member-no and the IP +addresses of the all gang members using --gang-ipv4-<memb-no> <ip>.</p> +</dd> +<dt>Else (state is 'gang-gathering'):</dt> +<dd><p class="first last">WAIT</p> +</dd> +</dl> +</li> +</ol> +</div> +<div class="section" id="pending-command-when-testbox-asks-for-work"> +<h2>#3 - Pending Command When Testbox Asks For Work</h2> +<p>This is a subfunction of scenario #2 and #5.</p> +<p>As seen in scenario #2, the testbox will send 'abort' commands to /dev/null +when it finds one when not executing a test. This includes when it reports +that the test has completed (no need to abort a completed test, wasting lot +of effort when standing at the finish line).</p> +<p>The other commands, though, are passed back to the testbox. The testbox +script will respond with an ACK or NACK as it sees fit. If NACKed, the +pending command will be removed (pending_cmd set to none) and that's it. +If ACKed, the state of the testbox will change to that appropriate for the +command and the pending_cmd set to none. Should the testbox script fail to +respond, the command will be repeated the next time it asks for work.</p> +</div> +<div class="section" id="testbox-uploads-results-during-test"> +<h2>#4 - Testbox Uploads Results During Test</h2> +<p>TODO</p> +</div> +<div class="section" id="testbox-completes-test-and-asks-for-work"> +<h2>#5 - Testbox Completes Test and Asks For Work</h2> +<p>This is very similar to scenario #2</p> +<p>TODO</p> +</div> +<div class="section" id="gang-gathering-timeout"> +<h2>#6 - Gang Gathering Timeout</h2> +<p>This is a subfunction of scenario #2.</p> +<p>When gathering a gang of testboxes for a testcase, we do not want to wait +forever and have testboxes doing nothing for hours while waiting for partners. +So, the gathering has a reasonable timeout (imagine something like 20-30 mins).</p> +<p>Also, we need some way of dealing with 'abort' and 'reboot' commands being +issued while waiting. The easy way out is pretent it's a time out.</p> +<p>When changing the status to 'gang-timeout' we have to be careful. First of all, +we need to exclusively lock the SchedQueues and TestBoxStatuses (in that order) +and re-query our status. If it changed redo the checks in scenario #2 point 2.</p> +<p>If we still want to timeout/abort, change the state from 'gang-gathering' to +'gang-gathering-timedout' on all the gang members that has gathered so far. +Then reset the scheduling queue record and move it to the end of the queue.</p> +<p>When acting on 'gang-timeout' the TM will fail the testset in a manner similar +to scenario #9. No need to repeat that.</p> +</div> +<div class="section" id="gang-cleanup"> +<h2>#7 - Gang Cleanup</h2> +<p>When a testbox completes a gang scheduled test, we will have to serialize +resource cleanup (both globally and on testboxes) as they stop. More details +can be found in the documentation of 'gang-cleanup'.</p> +<p>So, the transition from 'gang-testing' is always to 'gang-cleanup'. When we +can safely leave 'gang-cleanup' is decided by the query:</p> +<pre class="literal-block"> +SELECT COUNT(*) +FROM TestBoxStatuses, + TestSets +WHERE TestSets.idTestSetGangLeader = :idTestSetGangLeader + AND TestSets.idTestBox = TestBoxStatuses.idTestBox + AND TestBoxStatuses.enmState = 'gang-running'::TestBoxState_T; +</pre> +<p>As long as there are testboxes still running, we stay in the 'gang-cleanup' +state. Once there are none, we continue closing the testset and such.</p> +</div> +<div class="section" id="testbox-reports-a-crash-during-test-execution"> +<h2>#8 - Testbox Reports A Crash During Test Execution</h2> +<p>TODO</p> +</div> +<div class="section" id="cleaning-up-abandoned-testcase"> +<h2>#9 - Cleaning Up Abandoned Testcase</h2> +<p>This is a subfunction of scenario #1 and #2. The actions taken are the same in +both situations. The precondition for taking this path is that the row in the +testboxstatus table is refering to a testset (i.e. testset_id is not NULL).</p> +<p>Actions:</p> +<ol class="arabic"> +<li><dl class="first docutils"> +<dt>If the testset is incomplete, we need to completed:</dt> +<dd><ol class="first last loweralpha simple"> +<li>Add a message to the root TestResults row, creating one if necesary, +that explains that the test was abandoned. This is done +by inserting/finding the string into/in TestResultStrTab and adding +a row to TestResultMsgs with idStrMsg set to that string id and +enmLevel set to 'failure'.</li> +<li>Mark the testset as failed.</li> +</ol> +</dd> +</dl> +</li> +<li><p class="first">Free any global resources referenced by the test set. This is done by +deleting all rows in GlobalResourceStatuses matching the testbox id.</p> +</li> +<li><p class="first">Set the idTestSet to NULL in the TestBoxStatuses row.</p> +</li> +</ol> +</div> +<div class="section" id="cleaning-up-a-disabled-dead-testbox"> +<h2>#10 - Cleaning Up a Disabled/Dead TestBox</h2> +<p>The UI needs to be able to clean up the remains of a testbox which for some +reason is out of action. Normal cleaning up of abandoned testcases requires +that the testbox signs on or asks for work, but if the testbox is dead or +in some way indisposed, it won't be doing any of that. So, the testbox +sheriff needs to have a way of cleaning up after it.</p> +<p>It's basically a manual scenario #9 but with some safe guards, like checking +that the box hasn't been active for the last 1-2 mins (max idle/wait time * 2).</p> +<dl class="docutils"> +<dt>Note! When disabling a box that still executing the testbox script, this</dt> +<dd>cleanup isn't necessary as it will happen automatically. Also, it's +probably desirable that the testbox finishes what ever it is doing first +before going dormant.</dd> +</dl> +</div> +</div> +<div class="section" id="test-manager-analysis"> +<h1>Test Manager: Analysis</h1> +<p>One of the testbox sheriff's tasks is to try figure out the reason why something +failed. The test manager will provide facilities for doing so from very early +in it's implementation.</p> +<p>We need to work out some useful status reports for the early implementation. +Later there will be more advanced analysis tools, where for instance we can +create graphs from selected test result values or test execution times.</p> +</div> +<div class="section" id="implementation-plan"> +<h1>Implementation Plan</h1> +<p>This has changed for various reasons. The current plan is to implement the +infrastructure (TM & testbox script) first and do a small deployment with the +2-5 test drivers in the Testsuite as basis. Once the bugs are worked out, we +will convert the rest of the tests and start adding new ones.</p> +<p>We just need to finally get this done, no point in doing it piecemeal by now!</p> +<div class="section" id="test-manager-implementation-sub-tasks"> +<h2>Test Manager Implementation Sub-Tasks</h2> +<p>The implementation of the test manager and adjusting/completing of the testbox +script and the test drivers are tasks which can be done by more than one +person. Splitting up the TM implementation into smaller tasks should allow +parallel development of different tasks and get us working code sooner.</p> +</div> +<div class="section" id="milestone-1"> +<h2>Milestone #1</h2> +<p>The goal is to getting the fundamental testmanager engine implemented, debugged +and working. With the exception of testboxes, the configuration will be done +via SQL inserts.</p> +<p>Tasks in somewhat prioritized order:</p> +<blockquote> +<ul class="simple"> +<li>Kick off test manager. It will live in testmanager/. Salvage as much as +possible from att/testserv. Create basic source and file layout.</li> +<li>Adjust the testbox script, part one. There currently is a testbox script +in att/testbox, this shall be moved up into testboxscript/. The script +needs to be adjusted according to the specification layed down earlier +in this document. Installers or installation scripts for all relevant +host OSes are required. Left for part two is result reporting beyond the +primary log. This task must be 100% feature complete, on all host OSes, +there is no room for FIXME, XXX or @todo here.</li> +<li>Implement the schedule queue generator.</li> +<li>Implement the testbox dispatcher in TM. Support all the testbox script +responses implemented above, including upgrading the testbox script.</li> +<li>Implement simple testbox management page.</li> +<li>Implement some basic activity and result reports so that we can see +what's going on.</li> +<li>Create a testmanager / testbox test setup. This lives in selftest/.<ol class="arabic"> +<li>Set up something that runs, no fiddly bits. Debug till it works.</li> +<li>Create a setup that tests testgroup dependencies, i.e. real tests +depending on smoke tests.</li> +<li>Create a setup that exercises testcase dependency.</li> +<li>Create a setup that exercises global resource allocation.</li> +<li>Create a setup that exercises gang scheduling.</li> +</ol> +</li> +<li>Check that all features work.</li> +</ul> +</blockquote> +</div> +<div class="section" id="milestone-2"> +<h2>Milestone #2</h2> +<p>The goal is getting to VBox testing.</p> +<p>Tasks in somewhat prioritized order:</p> +<blockquote> +<ul class="simple"> +<li>Implement full result reporting in the testbox script and testbox driver. +A testbox script specific reporter needs to be implemented for the +testdriver framework. The testbox script needs to forward the results to +the test manager, or alternatively the testdriver report can talk +directly to the TM.</li> +<li>Implement the test manager side of the test result reporting.</li> +<li>Extend the selftest with some setup that report all kinds of test +results.</li> +<li>Implement script/whatever feeding builds to the test manager from the +tinderboxes.</li> +<li>The toplevel test driver is a VBox thing that must be derived from the +base TestDriver class or maybe the VBox one. It should move from +toptestdriver to testdriver and be renamed to vboxtltd or smth.</li> +<li>Create a vbox testdriver that boots the t-xppro VM once and that's it.</li> +<li>Create a selftest setup which tests booting t-xppro taking builds from +the tinderbox.</li> +</ul> +</blockquote> +</div> +<div class="section" id="milestone-3"> +<h2>Milestone #3</h2> +<p>The goal for this milestone is configuration and converting current testscases, +the result will be the a minimal test deployment (4-5 new testboxes).</p> +<p>Tasks in somewhat prioritized order:</p> +<blockquote> +<ul class="simple"> +<li>Implement testcase configuration.</li> +<li>Implement testgroup configuration.</li> +<li>Implement build source configuration.</li> +<li>Implement scheduling group configuration.</li> +<li>Implement global resource configuration.</li> +<li>Re-visit the testbox configuration.</li> +<li>Black listing of builds.</li> +<li>Implement simple failure analysis and reporting.</li> +<li>Implement the initial smoke tests modelled on the current smoke tests.</li> +<li>Implement installation tests for Windows guests.</li> +<li>Implement installation tests for Linux guests.</li> +<li>Implement installation tests for Solaris guest.</li> +<li>Implement installation tests for OS/2 guest.</li> +<li>Set up a small test deployment.</li> +</ul> +</blockquote> +</div> +<div class="section" id="further-work"> +<h2>Further work</h2> +<p>After milestone #3 has been reached and issues found by the other team members +have been addressed, we will probably go for full deployment.</p> +<p>Beyond this point we will need to improve reporting and analysis. There may be +configuration aspects needing reporting as well.</p> +<p>Once deployed, a golden rule will be that all new features shall have test +coverage. Preferrably, implemented by someone else and prior to the feature +implementation.</p> +</div> +</div> +<div class="section" id="discussion-logs"> +<h1>Discussion Logs</h1> +<div class="section" id="various-discussions-with-michal-and-or-klaus"> +<h2>2009-07-21,22,23 Various Discussions with Michal and/or Klaus</h2> +<ul class="simple"> +<li>Scheduling of tests requiring more than one testbox.</li> +<li>Scheduling of tests that cannot be executing concurrently on several machines +because of some global resource like an iSCSI target.</li> +<li>Manually create the test config permutations instead of having the test +manager create all possible ones and wasting time.</li> +<li>Distinguish between built types so we can run smoke tests on strick builds as +well as release ones.</li> +</ul> +</div> +<div class="section" id="brief-discussion-with-michal"> +<h2>2009-07-20 Brief Discussion with Michal</h2> +<ul class="simple"> +<li>Installer for the testbox script to make bringing up a new testbox even +smoother.</li> +</ul> +</div> +<div class="section" id="raw-input"> +<h2>2009-07-16 Raw Input</h2> +<ul> +<li><dl class="first docutils"> +<dt>test set. recursive collection of:</dt> +<dd><ul class="first last simple"> +<li>hierachical subtest name (slash sep)</li> +<li>test parameters / config</li> +<li>bool fail/succ</li> +<li>attributes (typed?)</li> +<li>test time</li> +<li>e.g. throughput</li> +<li>subresults</li> +<li>log</li> +<li>screenshots,....</li> +</ul> +</dd> +</dl> +</li> +<li><p class="first">client package (zip) dl from server (maybe client caching)</p> +</li> +<li><dl class="first docutils"> +<dt>thoughts on bits to do at once.</dt> +<dd><ul class="first last simple"> +<li>We <em>really</em> need the basic bits ASAP.</li> +<li>client -> support for test driver</li> +<li>server -> controls configs</li> +<li>cleanup on both sides</li> +</ul> +</dd> +</dl> +</li> +</ul> +</div> +<div class="section" id="id1"> +<h2>2009-07-15 Raw Input</h2> +<ul class="simple"> +<li>testing should start automatically</li> +<li>switching to branch too tedious</li> +<li>useful to be able to partition testboxes (run specific builds on some boxes, let an engineer have a few boxes for a while).</li> +<li>test specification needs to be more flexible (select tests, disable test, test scheduling (run certain tests nightly), ... )</li> +<li>testcase dependencies (blacklisting builds, run smoketests on box A before long tests on box B, ...)</li> +<li>more testing flexibility, more test than just install/moke. For instance unit tests, benchmarks, ...</li> +<li>presentation/analysis: graphs!, categorize bugs, columns reorganizing grouped by test (hierarchical), overviews, result for last day.</li> +<li>testcase specificion, variables (e.g. I/O-APIC, SMP, HWVIRT, SATA...) as sub-tests</li> +<li>interation with ILOM/...: reset systems</li> +<li>Changes needs LDAP authentication</li> +<li>historize all configuration w/ name</li> +<li>ability to run testcase locally (provided the VDI/ISO/whatever extra requirements can be met).</li> +</ul> +<hr class="docutils" /> +<table class="docutils footnote" frame="void" id="id2" rules="none"> +<colgroup><col class="label" /><col /></colgroup> +<tbody valign="top"> +<tr><td class="label">[1]</td><td>no such footnote</td></tr> +</tbody> +</table> +<hr class="docutils" /> +<table class="docutils field-list" frame="void" rules="none"> +<col class="field-name" /> +<col class="field-body" /> +<tbody valign="top"> +<tr class="field"><th class="field-name">Status:</th><td class="field-body">$Id: AutomaticTestingRevamp.html $</td> +</tr> +<tr class="field"><th class="field-name">Copyright:</th><td class="field-body">Copyright (C) 2010-2017 Oracle Corporation.</td> +</tr> +</tbody> +</table> +</div> +</div> +</div> +</body> +</html> |