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| <h1>Testing tools</h1> |
| |
| <!--- |
| Licensed to the Apache Software Foundation (ASF) under one or more |
| contributor license agreements. See the NOTICE file distributed with |
| this work for additional information regarding copyright ownership. |
| The ASF licenses this file to You under the Apache License, Version 2.0 |
| (the "License"); you may not use this file except in compliance with |
| the License. You may obtain a copy of the License at |
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| http://www.apache.org/licenses/LICENSE-2.0 |
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| Unless required by applicable law or agreed to in writing, software |
| distributed under the License is distributed on an "AS IS" BASIS, |
| WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| See the License for the specific language governing permissions and |
| limitations under the License. |
| --> |
| <p>Testing is one of the most important part during the development of a distributed system. We have the following type of test.</p> |
| <p>This page includes our existing test tool which are part of the Ozone source base.</p> |
| <p>Note: we have more tests (like TCP-DS, TCP-H tests via Spark or Hive) which are not included here because they use external tools only.</p> |
| <h2 id="unit-test">Unit test</h2> |
| <p>As every almost every java project we have the good old unit tests inside each of our projects.</p> |
| <h2 id="integration-test-junit">Integration test (JUnit)</h2> |
| <p>Traditional unit tests are supposed to test only one unit, but we also have higher level unit tests. They use <code>MiniOzoneCluster</code> which is a helper method to start real daemons (scm,om,datanodes) during the unit test.</p> |
| <p>From maven/java point of view they are just simple unit tests (JUnit library is used) but to separate them (and solve some dependency problems) we moved all of these tests to <code>hadoop-ozone/integration-test</code></p> |
| <h2 id="smoketest">Smoketest</h2> |
| <p>We use docker-compose based pseudo-cluster to run different configuration of Ozone. To be sure that the different configuration can be started we implemented <em>acceptance</em> tests with the help of <a href="https://robotframework.org/">https://robotframework.org/</a>.</p> |
| <p>The smoketests are available from the distribution (<code>./smoketest</code>) but the robot files defines only the tests: usually they start CLI and check the output.</p> |
| <p>To run the tests in different environment (docker-compose, kubernetes) you need a definition to start the containers and execute the right tests in the right containers.</p> |
| <p>These definition of the tests are included in the <code>compose</code> directory (check <code>./compose/*/test.sh</code> or <code>./compose/test-all.sh</code>).</p> |
| <p>For example a simple way to test the distribution package:</p> |
| <pre><code>cd compose/ozone |
| ./test.sh |
| </code></pre><h2 id="blockade">Blockade</h2> |
| <p><a href="https://github.com/worstcase/blockade">Blockade</a> is a tool to test network failures and partitions (it’s inspired by the legendary <a href="https://jepsen.io/analyses">Jepsen tests</a>).</p> |
| <p>Blockade tests are implemented with the help of tests and can be started from the <code>./blockade</code> directory of the distribution.</p> |
| <pre><code>cd blockade |
| pip install pytest==2.8.7,blockade |
| python -m pytest -s . |
| </code></pre><p>See the README in the blockade directory for more details.</p> |
| <h2 id="minichaosozonecluster">MiniChaosOzoneCluster</h2> |
| <p>This is a way to get <a href="https://en.wikipedia.org/wiki/Chaos_engineering">chaos</a> in your machine. It can be started from the source code and a MiniOzoneCluster (which starts real daemons) will be started and killed randomly.</p> |
| <h2 id="freon">Freon</h2> |
| <p>Freon is a command line application which is included in the Ozone distribution. It’s a load generator which is used in our stress tests.</p> |
| <p>Random keys:</p> |
| <p>In randomkeys mode, the data written into ozone cluster is randomly generated. Each key will be of size 10 KB.</p> |
| <p>The number of volumes/buckets/keys can be configured. The replication type and factor (eg. replicate with ratis to 3 nodes) also can be configured.</p> |
| <p>For more information use:</p> |
| <p>bin/ozone freon –help</p> |
| <p>For example:</p> |
| <pre><code>ozone freon randomkeys --num-of-volumes=10 --num-of-buckets 10 --num-of-keys 10 --replication-type=RATIS --factor=THREE |
| </code></pre><pre><code>*************************************************** |
| Status: Success |
| Git Base Revision: 48aae081e5afacbb3240657556b26c29e61830c3 |
| Number of Volumes created: 10 |
| Number of Buckets created: 100 |
| Number of Keys added: 1000 |
| Ratis replication factor: THREE |
| Ratis replication type: RATIS |
| Average Time spent in volume creation: 00:00:00,035 |
| Average Time spent in bucket creation: 00:00:00,319 |
| Average Time spent in key creation: 00:00:03,659 |
| Average Time spent in key write: 00:00:10,894 |
| Total bytes written: 10240000 |
| Total Execution time: 00:00:16,898 |
| *********************** |
| </code></pre> |
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