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| <div class="section" id="running-docker-builds"> |
| <span id="docker-builds"></span><h1>Running Docker Builds<a class="headerlink" href="#running-docker-builds" title="Permalink to this headline">¶</a></h1> |
| <p>Most of our Linux based Continuous Integration tasks are decoupled from public |
| CI services using <a class="reference external" href="https://docs.docker.com/">Docker</a> and |
| <a class="reference external" href="https://docs.docker.com/compose/">docker-compose</a>. Keeping the CI configuration |
| minimal makes local reproducibility possible.</p> |
| <div class="section" id="usage"> |
| <h2>Usage<a class="headerlink" href="#usage" title="Permalink to this headline">¶</a></h2> |
| <p>There are multiple ways to execute the docker based builds. |
| The recommended way is to use the <a class="reference internal" href="archery.html#archery"><span class="std std-ref">Archery</span></a> tool:</p> |
| <div class="section" id="examples"> |
| <h3>Examples<a class="headerlink" href="#examples" title="Permalink to this headline">¶</a></h3> |
| <p><strong>List the available images:</strong></p> |
| <div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>archery docker images |
| </pre></div> |
| </div> |
| <p><strong>Execute a build:</strong></p> |
| <div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>archery docker run conda-python |
| </pre></div> |
| </div> |
| <p>Archery calls the following docker-compose commands:</p> |
| <div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>docker-compose pull --ignore-pull-failures conda-cpp |
| docker-compose pull --ignore-pull-failures conda-python |
| docker-compose build conda-cpp |
| docker-compose build conda-python |
| docker-compose run --rm conda-python |
| </pre></div> |
| </div> |
| <p><strong>Show the docker-compose commands instead of executing them:</strong></p> |
| <div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>archery docker run --dry-run conda-python |
| </pre></div> |
| </div> |
| <p><strong>To disable the image pulling:</strong></p> |
| <div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>archery docker run --no-cache conda-python |
| </pre></div> |
| </div> |
| <p>Which translates to:</p> |
| <div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>docker-compose build --no-cache conda-cpp |
| docker-compose build --no-cache conda-python |
| docker-compose run --rm conda-python |
| </pre></div> |
| </div> |
| <p><strong>To disable the cache only for the leaf image:</strong></p> |
| <p>Useful to force building the development version of a dependency. |
| In case of the example below the command builds the |
| <code class="docutils literal notranslate"><span class="pre">conda-cpp</span> <span class="pre">></span> <span class="pre">conda-python</span> <span class="pre">></span> <span class="pre">conda-python-pandas</span></code> branch of the image tree |
| where the leaf image is <code class="docutils literal notranslate"><span class="pre">conda-python-pandas</span></code>.</p> |
| <div class="highlight-bash notranslate"><div class="highlight"><pre><span></span><span class="nv">PANDAS</span><span class="o">=</span>master archery docker run --no-leaf-cache conda-python-pandas |
| </pre></div> |
| </div> |
| <p>Which translates to:</p> |
| <div class="highlight-bash notranslate"><div class="highlight"><pre><span></span><span class="nb">export</span> <span class="nv">PANDAS</span><span class="o">=</span>master |
| docker-compose pull --ignore-pull-failures conda-cpp |
| docker-compose pull --ignore-pull-failures conda-python |
| docker-compose build conda-cpp |
| docker-compose build conda-python |
| docker-compose build --no-cache conda-python-pandas |
| docker-compose run --rm conda-python-pandas |
| </pre></div> |
| </div> |
| <p>Note that it doesn’t pull the conda-python-pandas image and disable the cache |
| when building it.</p> |
| <p><code class="docutils literal notranslate"><span class="pre">PANDAS</span></code> is a <a class="reference external" href="DockerBuildParameters">build parameter</a>, see the |
| defaults in the .env file.</p> |
| <p><strong>To entirely skip building the image:</strong></p> |
| <p>The layer-caching mechanism of docker-compose can be less reliable than |
| docker’s, depending on the version, the <code class="docutils literal notranslate"><span class="pre">cache_from</span></code> build entry, and the |
| backend used (docker-py, docker-cli, docker-cli and buildkit). This can lead to |
| different layer hashes - even when executing the same build command |
| repeatedly - eventually causing cache misses full image rebuilds.</p> |
| <p><em>If the image has been already built but the cache doesn’t work properly</em>, it |
| can be useful to skip the build phases:</p> |
| <div class="highlight-bash notranslate"><div class="highlight"><pre><span></span><span class="c1"># first run ensures that the image is built</span> |
| archery docker run conda-python |
| |
| <span class="c1"># if the second run tries the build the image again and none of the files</span> |
| <span class="c1"># referenced in the relevant dockerfile have changed, then it indicates a</span> |
| <span class="c1"># cache miss caused by the issue described above</span> |
| archery docker run conda-python |
| |
| <span class="c1"># since the image is properly built with the first command, there is no</span> |
| <span class="c1"># need to rebuild it, so manually disable the pull and build phases to</span> |
| <span class="c1"># spare the some time</span> |
| archery docker run --no-pull --no-build conda-python |
| </pre></div> |
| </div> |
| <p><strong>Pass environment variables to the container:</strong></p> |
| <p>Most of the build scripts used within the containers can be configured through |
| environment variables. Pass them using <code class="docutils literal notranslate"><span class="pre">--env</span></code> or <code class="docutils literal notranslate"><span class="pre">-e</span></code> CLI options - |
| similar to the <code class="docutils literal notranslate"><span class="pre">docker</span> <span class="pre">run</span></code> and <code class="docutils literal notranslate"><span class="pre">docker-compose</span> <span class="pre">run</span></code> interface.</p> |
| <div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>archery docker run --env <span class="nv">CMAKE_BUILD_TYPE</span><span class="o">=</span>release ubuntu-cpp |
| </pre></div> |
| </div> |
| <p>For the available environment variables in the C++ builds see the |
| <code class="docutils literal notranslate"><span class="pre">ci/scripts/cpp_build.sh</span></code> script.</p> |
| <p><strong>Run the image with custom command:</strong></p> |
| <p>Custom docker commands may be passed as the second argument to |
| <code class="docutils literal notranslate"><span class="pre">archery</span> <span class="pre">docker</span> <span class="pre">run</span></code>.</p> |
| <p>The following example starts an interactive <code class="docutils literal notranslate"><span class="pre">bash</span></code> session in the container |
| - useful for debugging the build interactively:</p> |
| <div class="highlight-bash notranslate"><div class="highlight"><pre><span></span>archery docker run ubuntu-cpp bash |
| </pre></div> |
| </div> |
| </div> |
| <div class="section" id="docker-volume-caches"> |
| <h3>Docker Volume Caches<a class="headerlink" href="#docker-volume-caches" title="Permalink to this headline">¶</a></h3> |
| <p>Most of the compose container have specific directories mounted from the host |
| to reuse <code class="docutils literal notranslate"><span class="pre">ccache</span></code> and <code class="docutils literal notranslate"><span class="pre">maven</span></code> artifacts. These docker volumes are placed |
| in the <code class="docutils literal notranslate"><span class="pre">.docker</span></code> directory.</p> |
| <p>In order to clean up the cache simply delete one or more directories (or the |
| whole <code class="docutils literal notranslate"><span class="pre">.docker</span></code> directory).</p> |
| </div> |
| </div> |
| <div class="section" id="development"> |
| <h2>Development<a class="headerlink" href="#development" title="Permalink to this headline">¶</a></h2> |
| <p>The docker-compose configuration is tuned towards reusable development |
| containers using hierarchical images. For example multiple language bindings |
| are dependent on the C++ implementation, so instead of redefining the |
| C++ environment multiple Dockerfiles, we can reuse the exact same base C++ |
| image when building Glib, Ruby, R and Python bindings. |
| This reduces duplication and streamlines maintenance, but makes the |
| docker-compose configuration more complicated.</p> |
| <div class="section" id="docker-build-parameters"> |
| <h3>Docker Build Parameters<a class="headerlink" href="#docker-build-parameters" title="Permalink to this headline">¶</a></h3> |
| <p>The build time parameters are pushed down to the dockerfiles to make the |
| image building more flexible. These parameters are usually called as docker |
| build args, but we pass these values as environment variables to |
| docker-compose.yml. The build parameters are extensively used for:</p> |
| <ul class="simple"> |
| <li><p>defining the docker registry used for caching</p></li> |
| <li><p>platform architectures</p></li> |
| <li><p>operation systems and versions</p></li> |
| <li><p>defining various versions if dependencies</p></li> |
| </ul> |
| <p>The default parameter values are stored in the top level .env file. |
| For detailed examples see the docker-compose.yml.</p> |
| </div> |
| <div class="section" id="build-scripts"> |
| <h3>Build Scripts<a class="headerlink" href="#build-scripts" title="Permalink to this headline">¶</a></h3> |
| <p>The scripts maintainted under ci/scripts directory should be kept |
| parametrizable but reasonably minimal to clearly encapsulate the tasks it is |
| responsible for. Like:</p> |
| <ul class="simple"> |
| <li><p><code class="docutils literal notranslate"><span class="pre">cpp_build.sh</span></code>: build the C++ implementation without running the tests.</p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">cpp_test.sh</span></code>: execute the C++ tests.</p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">python_build.sh</span></code>: build the Python bindings without running the tests.</p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">python_test.sh</span></code>: execute the python tests.</p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">docs_build.sh</span></code>: build the Sphinx documentation.</p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">integration_dask.sh</span></code>: execute the dask integration tests.</p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">integration_pandas.sh</span></code>: execute the pandas integration tests.</p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">install_minio.sh</span></code>: install minio server for multiple platforms.</p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">install_conda.sh</span></code>: install miniconda for multiple platforms.</p></li> |
| <li><p><code class="docutils literal notranslate"><span class="pre">install_gcs_testbench.sh</span></code>: install the GCS testbench for multiple platforms.</p></li> |
| </ul> |
| <p>The parametrization (like the C++ CMake options) is achieved via environment |
| variables with useful defaults to keep the build configurations declarative.</p> |
| <p>A good example is <code class="docutils literal notranslate"><span class="pre">cpp_build.sh</span></code> build script which forwards environment |
| variables as CMake options - so the same scripts can be invoked in various |
| configurations without the necessity of changing it. For examples see how the |
| environment variables are passed in the docker-compose.yml’s C++ images.</p> |
| </div> |
| <div class="section" id="adding-new-images"> |
| <h3>Adding New Images<a class="headerlink" href="#adding-new-images" title="Permalink to this headline">¶</a></h3> |
| <p>See the inline comments available in the docker-compose.yml file.</p> |
| </div> |
| </div> |
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