QA » openQA Project

# Introduction

This is the organisation wiki for the **openQA Project**.

The source code is hosted in the [os-autoinst github project](http://github.com/os-autoinst/), especially [openQA itself](http://github.com/os-autoinst/openQA) and the main backend [os-autoinst](http://github.com/os-autoinst/os-autoinst)

If you are interested in the tests for SUSE/openSUSE products take a look into the [openqatests](https://progress.opensuse.org/projects/openqatests) project.

{{toc}}

# Organisational

## ticket workflow

Picture: http://imagebin.suse.de/2127/img

The following ticket statuses are used together and their meaning is explained:

* *New*: No one has worked on the ticket (e.g. the ticket has not been properly refined) or no one is feeling responsible for the work on this ticket.

* *In Progress*: Any state between *New* and *Resolved*. The ticket has been refined and is ready to be picked.

* *Resolved*: The complete work on this issue is done and the according issue is supposed to be fixed as observed (Should be updated together with a link to a merged pull request or also a link to an production openQA showing the effect)

* *Feedback*: Further work on the ticket is blocked by external dependency or open points. Sometimes also used to ask Assignee about progress on inactivity

* *Rejected*: The issue is considered invalid, should not be done, is considered out of scope.

* *Closed*: As this can be set only by administrators it is suggested to not use this status.

It is good practice to update the status together with a comment about it, e.g. a link to a pull request or a reason for reject.

## ticket templates

You can use these templates to fill in tickets and further improve them with more detail over time. Copy the code block, paste it into a new issue, replace every block marked with "<…>" with your content or delete if not appropriate.

### defects

Subject: `<Short description, example: "openQA dies when triggering any Windows ME tests">`

```

## observation

<description of what can be observed and what the symptoms are, provide links to failing test results and/or put short blocks from the log output here to visualize what is happening>

## steps to reproduce

* <do this>

* <do that>

* <observe result>

## problem

<problem investigation, can also include different hypotheses, should be labeled as "H1" for first hypothesis, etc.>

## suggestion

<what to do as a first step>

## workaround

<example: retrigger job>

```

example ticket: #10526

### feature requests

Subject: `<Short description, example: "grub3 btrfs support" (feature)>`

```

## User story

<As a <role>, I want to <do an action>, to <achieve which goal> >

## acceptance criteria

* <**AC1:** the first acceptance criterion that needs to be fulfilled to do this, example: Clicking "restart button" causes restart of the job>

* <**AC2:** also think about the "not-actions", example: other jobs are not affected>

## tasks

* <first task to do as an easy starting point>

* <what do do next>

* <optional: mark "optional" tasks>

## further details

<everything that does not fit into above sections>

```

example ticket: #10212

## Further decision steps working on test issues

Test issues could be one of the following sources. Feel free to use the following template in tickets as well

```

## Problem

* **H1** The product has changed

 * **H1.1** product changed slightly but in an acceptable way without the need for communication with DEV+RM --> adapt test

 * **H1.2** product changed slightly but in an acceptable way found after feedback from RM --> adapt test

 * **H1.3** product changed significantly --> after approval by RM adapt test

* **H2** Fails because of changes in test setup

 * **H2.1** Our test hardware equipment behaves different

 * **H2.2** The network behaves different

* **H3** Fails because of changes in test infrastructure software, e.g. os-autoinst, openQA

* **H4** Fails because of changes in test management configuration, e.g. openQA database settings

* **H5** Fails because of changes in the test software itself (the test plan in source code as well as needles)

* **H6** Sporadic issue, i.e. the root problem is already hidden in the system for a long time but does not show symptoms every time

```

## pull request handling on github

As a reviewer of pull requests on github for all related repositories, e.g. https://github.com/os-autoinst/os-autoinst-distri-opensuse/pulls, apply labels in case PRs are open for a longer time and can not be merged so that we keep our backlog clean and know why PRs are blocked.

* **notready**: Triaged as not ready yet for merging, no (immediate) reaction by the reviewee, e.g. when tests are missing, other scenarios break, only tested for one of SLE/TW

* **wip**: Marked by the reviewee itself as "[WIP]" or "[DO-NOT-MERGE]" or similar

* **question**: Questions to the reviewee, not answered yet

## Where to contribute?

If you want to help openQA development you can take a look into the existing [issues](https://progress.opensuse.org/projects/openqav3/issues). There are also some "always valid" tasks to be working on:

* *improve test coverage*:

 * *user story*: As openqa backend as well as test developer I want better test coverage of our projects to reduce technical debt

 * *acceptance criteria*: test coverage is significantly higher than before

 * *suggestions*: check current coverage in each individual project (os-autoinst/openQA/os-autoinst-distri-opensuse) and add tests as necessary

# Use cases

The following use cases 1-6 have been defined within a SUSE workshop (others have been defined later) to clarify how different actors work with openQA. Some of them are covered already within openQA quite well, some others are stated as motivation for further feature development.

## Use case 1

**User:** QA-Project Managment

**primary actor:** QA Project Manager, QA Team Leads

**stakeholder:** Directors, VP

**trigger:** product milestones, providing a daily status

**user story:** „As a QA project manager I want to check on a daily basis the „openQA Dashboard“ to get a summary/an overall status of the „reviewers results“ in order to take the right actions and prioritize tasks in QA accordingly.“

## Use case 2

**User:** openQA-Admin

**primary actor:** Backend-Team

**stakeholder:** Qa-Prjmgr, QA-TL, openQA Tech-Lead

**trigger:** Bugs, features, new testcases

**user story:** „As an openQA admin I constantly check in the web-UI the system health and I manage its configuration to ensure smooth operation of the tool.“

## Use case 3

**User:** QA-Reviewer

**primary actor:** QA-Team

**stakeholder:** QA-Prjmgr, Release-Mgmt, openQA-Admin

**trigger:** every new build

**user story:** „As an openQA-Reviewer at any point in time I review on the webpage of openQA the overall status of a build in order to track and find bugs, because I want to find bugs as early as possible and report them.“

## Use case 4

**User:** Testcase-Contributor

**primary actor:** All development teams, Maintenance QA

**stakeholder:** QA-Reviewer, openQA-Admin, openQA Tech-Lead

**trigger:** features, new functionality, bugs, new product/package

**user story:** „As developer when there are new features, new functionality, bugs, new product/package in git I contribute my testcases because I want to ensure good quality submissions and smooth product integration.“

## Use case 5

**User:** Release-Mgmt

**primary actor:** Release Manager

**stakeholder:** Directors, VP, PM, TAMs, Partners

**trigger:** Milestones

**user story:** „As a Release-Manager on a daily basis I check on a dashboard for the product health/build status in order to act early in case of failures and have concrete and current reports.“

## Use case 6

**User:** Staging-Admin

**primary actor:** Staging-Manager for the products

**stakeholder:** Release-Mgmt, Build-Team

**trigger:** every single submission to projects

**user story:** „As a Staging-Manager I review the build status of packages with every staged submission to the „staging projects“ in the „staging dashboard“ and the test-status of the pre-integrated fixes, because I want to identify major breakage before integration to the products and provide fast feedback back to the development.“

## Use case 7

**User:** Bug investigator

**primary actor:** Any bug assignee for openQA observed bugs

**stakeholder:** Developer

**trigger:** bugs

**user story:** „As a developer that has been assigned a bug which has been observed in openQA I can review referenced tests, find a newer and the most recent job in the same scenario, understand what changed since the last successful job, what other jobs show same symptoms to investigate the root cause fast and use openQA for verification of a bug fix.“

# Glossary

The following terms are used within the context of openQA:

 * ***test modules***: an individual test case in a single perl module file, e.g. "sshxterm". If not further specified a test module is denoted with its "short name" equivalent to the filename including the test definition. The "full name" is composed of the *test group* (TBC), which itself is formed by the top-folder of the test module file, and the short name, e.g. "x11-sshxterm" (for x11/sshxterm.pm)

 * ***test suite***: a collection of *test modules*, e.g. "textmode". All *test modules* within one *test suite* are run serially

 * ***job***: one run of individual test cases in a row denoted by a unique number for one instance of openQA, e.g. one installation with subsequent testing of applications within gnome

 * ***test run***: equivalent to *job*

 * ***test result***: the result of one job, e.g. "passed" with the details of each individual *test module*

 * ***test step***: the execution of one *test module* within a *job*

 * ***distri***: a test distribution but also sometimes referring to a *product* (CAUTION: ambiguous, historically a "GNU/Linux distribution"), composed of multiple ***test modules*** in a folder structure that compose ***test suites***, e.g. "opensuse" (test distribution, short for "os-autoinst-distri-opensuse")

 * ***product***: the main "system under test" (SUT), e.g. "openSUSE"

 * ***job group***: equivalent to *product*, used in context of the webUI

 * ***version***: one version of a *product*, don't confuse with *builds*, e.g. "Tumbleweed"

 * ***flavor***: a specific variant of a *product* to distinguish differing variants, e.g. "DVD"

 * ***arch***: an architecture variant of a *product*, e.g. "x86_64"

 * ***machine***: additional variant of machine, e.g. used for "64bit", "uefi", etc.

 * ***scenario***: A composition of `<distri>-<version>-<flavor>-<arch>-<test_suite>@<machine>`, e.g. "openSUSE-Tumbleweed-DVD-x86_64-gnome@64bit", nicknamed *koala*

 * ***build***: Different versions of a product as tested, can be considered a "sub-version" of *version*, e.g. "Build1234"; CAUTION: ambiguity: either with the prefix "Build" included or not)

# Thoughts about categorizing test results, issues, states within openQA

by okurz

When reviewing test results it is important to distinguish between different causes of "failed tests"

## Nomenclature

### Test status categories

A common definition about the status of a test regarding the product it tests: "false|true positive|negative" as described on https://en.wikipedia.org/wiki/False_positives_and_false_negatives. "positive|negative" describes the outcome of a test ("positive": test signals presence of issue; "negative": no signal) whereas "false|true" describes the conclusion of the test regarding the presence of issues in the SUT or product in our case ("true": correct reporting; "false": incorrect reporting), e.g. "true negative", test successful, no issues detected and there are no issues, product is working as expected by customer. Another example: Think of testing as of a fire alarm. An alarm (event detector) should only go off (be "positive") *if* there is a fire (event to detect) --> "true positive" whereas *if* there is *no* fire there should be *no* alarm --> "true negative".

Another common but potentially ambiguous categorization:

* *broken*: the test is not behaving as expected (Ambiguity: "as expected" by whom?) --> commonly a "false positive", can also be "false negative" but hard to detect

* *failing*: the test is behaving as expected, but the test output is a fail --> "true positive"

* *working*: the test is behaving as expected (with no comment regarding the result, though some might ambiguously imply 'result is negative')

* *passing*: the test is behaving as expected, but the result is a success --> "true negative"

If in doubt declare a test as "broken". We should review the test and examine if it is behaving as expected.

Be careful about "positive/negative" as some might also use "positive" to incorrectly denote a passing test (and "negative" for failing test) as an indicator of "working product" not an indicator about "issue present". If you argue what is "used in common speech" think about how "false positive" is used as in "false alarm" --> "positive" == "alarm raised", also see https://narainko.wordpress.com/2012/08/26/understanding-false-positive-and-false-negative/

### Priorization of work regarding categories

In this sense development+QA want to accomplish a "true negative" state whenever possible (no issues present, therefore none detected). As QA and test developers we want to prevent "false positives" ("false alarms" declaring a product as broken when it is not but the test failed for other reasons), also known as "type I error" and "false negatives" (a product issue is not catched by tests and might "slip through" QA and at worst is only found by an external outside customer) also known as "type II error". Also see https://en.wikipedia.org/wiki/Type_I_and_type_II_errors. In the context of openQA and system testing paired with screen matching a "false positive" is much more likely as the tests are very susceptible to subtle variations and changes even if they should be accepted. So when in doubt, create an issue in progress, look at it again, and find that it was a false alarm, rather than wasting more peoples time with INVALID bug reports by believing the product to be broken when it isn't. To quote Richard Brown: "I […] believe this is the route to ongoing improvement - if we have tests which produce such false alarms, then that is a clear indicator that the test needs to be reworked to be less ambiguous, and that IS our job as openQA developers to deal with".

## Further categorization of statuses, issues and such in testing, especially automatic tests

By okurz

This categorization scheme is meant to help in communication in either written or spoken discussions being simple, concise, easy to remember while unambiguous in every case.

While used for naming it should also be used as a decision tree and can be followed from the top following each branch.

### Categorization scheme

To keep it simple I will try to go in steps of deciding if a potential issue is of one of two categories in every step (maybe three) and go further down from there. The degree of further detailing is not limited, i.e. it can be further extended. Naming scheme should follow arabic number (for two levels just 1 and 2) counting schemes added from the right for every additional level of decision step and detail without any separation between the digits, e.g. "1111" for the first type in every level of detail up to level four. Also, I am thinking of giving the fully written form phonetic name to unambiguously identify each on every level as long as not more individual levels are necessary. The alphabet should be reserved for higher levels and higher priority types.

Every leaf of the tree must have an action assigned to it.

1 **failed** (ZULU)

11 new (passed->failed) (YANKEE)

111 product issue ("true positive") (WHISKEY)

1111 unfiled issue (SIERRA)

11111 hard issue (openqa *fail*) (KILO)

111121 critical / potential ship stopper (INDIA) --> immediately file bug report with "ship_stopper?" flag; opt. inform RM directly

111122 non-critical hard issue (HOTEL) --> file bug report

11112 soft issue (openqa *softfail* on job level, not on module level) (JULIETT) --> file bug report on failing test module

1112 bugzilla bug exists (ROMEO)

11121 bug was known to openqa / openqa developer --> cross-reference (bug->test, test->bug) AND raise review process issue, improve openqa process

11122 bug was filed by other sources (e.g. beta-tester) --> cross-reference (bug->test, test->bug)

112 test issue ("false positive") (VICTOR)

1121 progress issue exists (QUEBEC) --> cross-reference (issue->test, test->issue)

1122 unfiled test issue (PAPA)

11221 easy to do w/o progress issue

112211 need needles update --> re-needle if sure, TODO how to notify?

112212 pot. flaky, timeout

1122121 retrigger yields PASS --> comment in progress about flaky issue fixed

1122122 reproducible on retrigger --> file progress issue

11222 needs progress issue filed --> file progress issue

12 existing / still failing (failed->failed) (XRAY)

121 product issue (UNIFORM)

1211 unfiled issue (OSCAR) --> file bug report AND raise review process issue (why has it not been found and filed?)

1212 bugzilla bug exists (NOVEMBER) --> ensure cross-reference, also see rules for 1112 ROMEO

122 test issue (TANGO)

1221 progress issue exists (MIKE) --> monitor, if persisting reprioritize test development work

1222 needs progress issue filed (LIMA) --> file progress issue AND raise review process issue, see 1211 OSCAR

2 **passed** (ALFA)

21 stable (passed->passed) (BRAVO)

211 existing "true negative" (DELTA) --> monitor, maybe can be made stricter

212 existing "false negative" (ECHO) --> needs test improvement

22 fixed (failed->passed) (CHARLIE)

222 fixed "true negative" (FOXTROTT) --> TODO split monitor, see 211 DELTA

2221 was test issue --> close progress issue

2222 was product issue

22221 no bug report exists --> raise review process issue (why was it not filed?)

22222 bug report exists

222221 was marked as RESOLVED FIXED

221 fixed but "false negative" (GOLF) --> potentially revert test fix, also see 212 ECHO

Priority from high to low: INDIA->OSCAR->HOTEL->JULIETT->…

# Advanced features in openQA

There are some features in openQA for reviewing test results and common practices. Some of these features are presented here based on the pull requests from github.

## Show previous results in test results page [gh#538](https://github.com/os-autoinst/openQA/pull/538)

On a tests result page there is a tab for "previous results" showing the result of test runs in the same scenario. This shows previous builds as well as test runs in the same build. This way you can easily check and compare results from before including any comments, labels, bug references (see next section). This helps to answer questions like "Is this a new issue", "Is it reproducable", "has it been seen in before", "how does the history look like".

Querying the database for former test runs of the same scenario is a rather

costly operation which we do not want to do for multiple test results at once

but only for each individual test result (1:1 relation). This is why this is done in each individual test result and not for a complete build.

The evaluation of previous jobs is limited but can be adjusted with the query parameter `limit_previous=<nr>` in the test URL, e.g. to provide a link to the tab in the results page showing the previous 30 results of test 1234 on openqa.opensuse.org you would write

`http://openqa.opensuse.org/tests/1234?limit_previous=30#previous`

Remember that the higher the limit, the more complex the database queries will be increasing the lookup time as well as the load on openQA to generate the result.

Related issue: #10212

Screenshot of feature:

![screenshot_20160210_142024](https://cloud.githubusercontent.com/assets/1693432/12948308/7e915a3c-d001-11e5-840b-2f070c3cb8a5.png)

## Link to latest in scenario name [gh#836](https://github.com/os-autoinst/openQA/pull/836)

Find the always latest job in a scenario with the link after the scenario name in the tab "Previous results"

Screenshot:

![openqa_link_to_latest_in_previous](https://cloud.githubusercontent.com/assets/1693432/18145393/5b5fb544-6fcb-11e6-967b-f24ffc6a498c.png)

## Add 'latest' query route [gh#815](https://github.com/os-autoinst/openQA/pull/815)

Should always refer to most recent job for the specified scenario.

* have the same link for test development, i.e. if one retriggers tests, the

person has to always update the URL. If there would be a static URL even the

browser can be instructed to reload the page automatically

* for linking to the always current execution of the last job within one

scenario, e.g. to respond faster to the standard question in bug reports "does

this bug still happen?"

Examples:

* `tests/latest?distri=opensuse&version=13.1&flavor=DVD&arch=x86_64&test=kde&machine=64bit`

* `tests/latest?flavor=DVD&arch=x86_64&test=kde`

* `tests/latest?test=foobar` - this searches for the most recent job using test_suite 'foobar' covering all distri, version, flavor, arch, machines. To be more specific, add the other query entries.

## Add web UI controls to select 20/50/100/400 previous results [gh#744](https://github.com/os-autoinst/openQA/pull/744)

The query parameter 'limit_previous' allows to show more than the default 10

previous results on demand for some time. There are web UI

selections below the table of the previous build to reload the same page with

higher number of previous results on demand.

Example screenshot:

![openqa_limit_previous_results_gui_100percent_padded](https://cloud.githubusercontent.com/assets/1693432/16642470/7f3cf080-440b-11e6-84b2-0485b2fd1810.png)

## Show bug or label icon on overview if labeled [gh#550](https://github.com/os-autoinst/openQA/pull/550)

* Show bug icon with URL if mentioned in test comments

* Show bug or label icon on overview if labeled

For bugreferences write `<bugtracker_shortname>#<bug_nr>` in a comment, e.g. "bsc#1234", for generic labels use `label:<keyword>` where `<keyword>` can be any valid character up to the next whitespace, e.g. "false_positive". The keywords are not defined within openQA itself. A valid list of keywords should be decided upon within each project or environment of one openQA instance.

Example for a generic label:

![openqa_generic_label](https://cloud.githubusercontent.com/assets/1693432/13027322/7bce7992-d24a-11e5-99ee-839fb5e82169.png)

Example for bug label:

![openqa_bug_label](https://cloud.githubusercontent.com/assets/1693432/13027323/8555238a-d24a-11e5-83d5-5bb2d2140860.png)

Related issue: #10212

Hint: You can also write (or copy-paste) full links to bugs and issues. The links are automatically changed to the shortlinks (e.g. https://progress.opensuse.org/issues/11110 turns into [poo#11110](https://progress.opensuse.org/issues/11110)). Related issue: #11110

Also github pull requests and issues can be linked using the generic format

`<marker>[#<project/repo>]#<id>`, e.g. [gh#os-autoinst/openQA#1234](https://github.com/os-autoinst/openQA/issues/1234), see [gh#973](https://github.com/os-autoinst/openQA/pull/973)

## Show certificate next to builds on overview if all failures are labeled [gh#560](https://github.com/os-autoinst/openQA/pull/560), [gh#1052](https://github.com/os-autoinst/openQA/pull/1052)

See [online documentation about review badges](http://open.qa/docs/#_review_badges).

## Allow group overview query by result [gh#531](https://github.com/os-autoinst/openQA/pull/531)

This allows e.g. to show only failed builds. Could be included like in http://lists.opensuse.org/opensuse-factory/2016-02/msg00018.html for "known defects".

Example: Add query parameters like `…&result=failed&arch=x86_64` to show only failed for the single architecture selected.

## Add web UI controls to select more builds in group_overview [gh#804](https://github.com/os-autoinst/openQA/pull/804)

The query parameter 'limit_builds' allows to show more than the default 10

builds on demand. Just like we have for configuring previous results, the

current commit adds web UI selections to reload the same page with

higher number of builds on demand. For this, the limit of days is increased

to show more builds but still limited by the selected number.

Example screenshot:

![openqa_limit_builds_current_bold](https://cloud.githubusercontent.com/assets/1693432/17462279/59e344e6-5ca8-11e6-8350-42a0fbb5267d.png)

## Add more query parameters for configuring last builds [gh#575](https://github.com/os-autoinst/openQA/pull/575)

By using advanced query parameters in the URLs you can configure the search for builds.

Higher numbers would yield more complex database queries but can be selected

for special investigation use cases with the advanced query parameters, e.g. if one wants to get an overview of a longer history.

This applies to both the index dashboard and group overview page.

Example to show up to three week old builds instead of the default two weeks

with up to 20 builds instead of up to 10 being the default for the group

overview page:

    http://openqa/group_overview/1?time_limit_days=21&limit_builds=20

## Build tagging and keeping important builds [gh#591](https://github.com/os-autoinst/openQA/pull/591)

See [online documentation about build tagging](http://open.qa/docs/#_build_tagging).

## Add web UI controls to filter only tagged or all builds [gh#807](https://github.com/os-autoinst/openQA/pull/807)

Using a new query parameter 'only_tagged=[0|1]' the list can be filtered, e.g. show only tagged (important) builds.

Example screenshot:

![openqa_limit_builds_current_bold_and_only_tagged](https://cloud.githubusercontent.com/assets/1693432/17464792/49bb6b18-5ce7-11e6-8053-7b74faf193a7.png)

Related issue: #11052

## Carry over bugrefs from previous jobs in same scenario if still failing [gh#564](https://github.com/os-autoinst/openQA/pull/564)

It is possible to label all failing tests but tedious to do by a human user

as many failures are just having the same issue until it gets fixed.

It helps if a label is preserved for a build that is still failing. This

idea is inspired by

https://wiki.jenkins-ci.org/display/JENKINS/Claim+plugin

and has been activated for bugrefs.

Does not carry over bugrefs over passes: After a job passed a new issue in a subsequent fail is assumed to be failed

for a different reason.

Related issue: #10212

## Distinguish product and test issues bugref [gh#708](https://github.com/os-autoinst/openQA/pull/708)

"progress" is used to track test issues, bugzilla for product issues, at least for SUSE/openSUSE. openQA bugrefs distinguish this and show corresponding icons

![different_bug_icons](https://cloud.githubusercontent.com/assets/1693432/15814910/e4e74bf6-2bc9-11e6-83de-20f18a7494de.png)

## Pinning comments as group description

This is possible by adding the keyword `pinned-description` anywhere in a comment on the group overview page. Then the comment will be shown at the top of the group overview page. However, it only works as operator or admin.

## Filtering test results in test result overview

See [online documentation](http://open.qa/docs/#_filtering_test_results_and_builds).

## Proposals for uses of labels

With [Show bug or label icon on overview if labeled (gh#550)](https://github.com/os-autoinst/openQA/pull/550) it is possible to add custom labels just by writing them. Nevertheless, a convention should be found for a common benefit. <del>Beware that labels are also automatically carried over with (Carry over labels from previous jobs in same scenario if still failing [gh#564])(https://github.com/os-autoinst/openQA/pull/564) which might make consistent test failures less visible when reviewers only look for test results without labels or bugrefs.</del> Labels are not anymore automatically carried over ([gh#1071](https://github.com/os-autoinst/openQA/pull/1071)).

List of proposed labels with their meaning and where they could be applied.

* ***`fixed_<build_ref>`***: If a test failure is already fixed in a more recent build and no bug reference is known, use this label together with a reference to a more recent passed test run in the same scenario. Useful for reviewing older builds. Example (https://openqa.suse.de/tests/382518#comments):

```

label:fixed_Build1501

t#382919

```

* ***`needles_added`***: In case needles were missing for test changes or expected product changes caused needle matching to fail, use this label with a reference to the test PR or a proper reasoning why the needles were missing and how you added them. Example (https://openqa.suse.de/tests/388521#comments):

```

label:needles_added

needles for https://github.com/os-autoinst/os-autoinst-distri-opensuse/pull/1353 were missing, added by jpupava in the meantime.

```

# s390x Test Organisation

See the following picture for a graphical overview of the current s390x test infrastructure at SUSE:

![SUSE s390x test infrastructure](qa_sle_openqa_s390x_test_infrastructure.jpg)

## Upgrades 

### on z/VM 

#### special Requirements

Due to the lack of proper use of hdd-images on zVM, we need to workaround this with having a dedicated worker_class aka a dedicated Host where we run two jobs with START_AFTER_TEST,

the first one which installs the basesystem we want to have upgraded and a second one which is doing the actually upgrade (e.g migration_offline_sle12sp2_zVM_preparation and migration_offline_sle12sp2_zVM)

Since we encountered issues with randomly other preparation jobs are started in between there, we need to ensure that we have one complete chain for all migration jobs running on one worker, that means for example:

* #1: migration_offline_sle12sp2_zVM_preparation 

* #2: migration_offline_sle12sp2_zVM (START_AFTER_TEST=#1) 

* #3: migration_offline_sle12sp2_allpatterns_zVM_preparation (START_AFTER_TEST=#2) 

* #4: migration_offline_sle12sp2_allpatterns_zVM 

* ...

This scheme ensures that all actual Upgrade jobs are finding the prepared system and are able to upgrade it

### on z/KVM

No special requirements anymore, see details in #18016