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itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">Bootstrap MetadataChangeProposals (MCPs)</span><meta itemprop="position" content="2"></li></ul></nav><span class="theme-doc-version-badge badge badge--secondary">Version: Next</span><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><h1>Bootstrap MetadataChangeProposals (MCPs)</h1><p>Bootstrap MCPs are templated MCPs which are loaded when the <code>system-update</code> job runs. This allows adding
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entities and aspects to DataHub at install time with the ability to customize them via environment variable
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overrides.</p><p>The built-in bootstrap MCP process can also be extended with custom MCPs. This can streamline deployment
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scenarios where a set of standard ingestion recipes, data platforms, users groups, or other configuration
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can be applied without the need for developing custom scripts.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="process-overview">Process Overview<a href="#process-overview" class="hash-link" aria-label="Direct link to Process Overview" title="Direct link to Process Overview"></a></h2><p>When DataHub is installed or upgraded, a job runs called <code>system-update</code>, this job is responsible for data
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migration (particularly Elasticsearch indices) and ensuring the data is prepared for the next version of
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DataHub. This is the job which will also apply the bootstrap MCPs.</p><p>The <code>system-update</code> job, depending on configuration, can be split into two sequences of steps. If they are
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not split, then all steps are blocking.</p><ol><li>An initial blocking sequence which is run prior to the new version of GMS and other components</li><li>Second sequence of steps where GMS and other components are allowed to run while additional data migration steps are
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continued in the background</li></ol><p>When applying bootstrap MCPs <code>system-update</code> will perform the following steps:</p><ol><li>The <code>bootstrap_mcps.yaml</code> file is read, either from a default classpath location, <code>bootstrap_mcps.yaml</code>, or a filesystem location
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provided by an environment variable, <code>SYSTEM_UPDATE_BOOTSTRAP_MCP_CONFIG</code>.</li><li>Depending on the mode of blocking or non-blocking each entry in the configuration file will be executed in sequence.</li><li>The template MCP file is loaded either from the classpath, or a filesystem location, and the template values are applied.</li><li>The rendered template MCPs are executed with the options specified in the <code>bootstrap_mcps.yaml</code>.</li></ol><h2 class="anchor anchorWithStickyNavbar_LWe7" id="bootstrap_mcpsyaml-configuration"><code>bootstrap_mcps.yaml</code> Configuration<a href="#bootstrap_mcpsyaml-configuration" class="hash-link" aria-label="Direct link to bootstrap_mcpsyaml-configuration" title="Direct link to bootstrap_mcpsyaml-configuration"></a></h2><p>The <code>bootstrap_mcps.yaml</code> file has the following format.</p><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token key atrule">bootstrap</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">templates</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">-</span><span class="token plain"> </span><span class="token key atrule">name</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> <name</span><span class="token punctuation" style="color:rgb(199, 146, 234)">></span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">version</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> <version</span><span class="token punctuation" style="color:rgb(199, 146, 234)">></span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">force</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" style="color:rgb(255, 88, 116)">false</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">blocking</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" style="color:rgb(255, 88, 116)">false</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">async</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" style="color:rgb(255, 88, 116)">true</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">optional</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token boolean important" style="color:rgb(255, 88, 116)">false</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">mcps_location</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> <classpath or file location</span><span class="token punctuation" style="color:rgb(199, 146, 234)">></span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">values_env</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> <environment variable</span><span class="token punctuation" style="color:rgb(199, 146, 234)">></span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><p>Each entry in the list of templates points to a single yaml file which can contain one or more MCP objects. The
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execution of the template MCPs is tracked by name and version to prevent re-execution. The MCP objects are executed once
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unless <code>force=true</code> for each <code>name</code>/<code>version</code> combination.</p><p>See the following table of options for descriptions of each field in the template configuration.</p><table><thead><tr><th>Field</th><th>Default</th><th>Required</th><th>Description</th></tr></thead><tbody><tr><td>name</td><td></td><td><code>true</code></td><td>The name for the collection of template MCPs.</td></tr><tr><td>version</td><td></td><td><code>true</code></td><td>A string version for the collection of template MCPs.</td></tr><tr><td>force</td><td><code>false</code></td><td><code>false</code></td><td>Ignores the previous run history, will not skip execution if run previously.</td></tr><tr><td>blocking</td><td><code>false</code></td><td><code>false</code></td><td>Run before GMS and other components during upgrade/install if running in split blocking/non-blocking mode.</td></tr><tr><td>async</td><td><code>true</code></td><td><code>false</code></td><td>Controls whether the MCPs are executed for sync or async ingestion.</td></tr><tr><td>optional</td><td><code>false</code></td><td><code>false</code></td><td>Whether to ignore a failure or fail the entire <code>system-update</code> job.</td></tr><tr><td>mcps_location</td><td></td><td><code>true</code></td><td>The location of the file which contains the template MCPs</td></tr><tr><td>values_env</td><td></td><td><code>false</code></td><td>The environment variable which contains override template values.</td></tr></tbody></table><h2 class="anchor anchorWithStickyNavbar_LWe7" id="template-mcps">Template MCPs<a href="#template-mcps" class="hash-link" aria-label="Direct link to Template MCPs" title="Direct link to Template MCPs"></a></h2><p>Template MCPs are stored in a yaml file which uses the mustache templating library to populate values from an optional environment
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variable. Defaults can be provided inline making override only necessary when providing install/upgrade time configuration.</p><p>In general the file contains a list of MCPs which follow the schema definition for MCPs exactly. Any valid field for an MCP
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is accepted, including optional fields such as <code>headers</code>.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="example-native-group">Example: Native Group<a href="#example-native-group" class="hash-link" aria-label="Direct link to Example: Native Group" title="Direct link to Example: Native Group"></a></h3><p>An example template MCP collection, configuration, and values environment variable is shown below which would create a native group.</p><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token punctuation" style="color:rgb(199, 146, 234)">-</span><span class="token plain"> </span><span class="token key atrule">entityUrn</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> urn</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain">li</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain">corpGroup</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain">group.id</span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">entityType</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> corpGroup</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">aspectName</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> corpGroupInfo</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">changeType</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> UPSERT</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">aspect</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">description</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain">group.description</span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain">^group.description</span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain">Default description</span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain">/group.description</span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">displayName</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain">group.displayName</span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">created</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token important">&auditStamp</span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">members</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">[</span><span class="token punctuation" style="color:rgb(199, 146, 234)">]</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># required as part of the aspect's schema definition</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">groups</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">[</span><span class="token punctuation" style="color:rgb(199, 146, 234)">]</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># required as part of the aspect's schema definition</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">admins</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">[</span><span class="token punctuation" style="color:rgb(199, 146, 234)">]</span><span class="token plain"> </span><span class="token comment" style="color:rgb(105, 112, 152);font-style:italic"># required as part of the aspect's schema definition</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token punctuation" style="color:rgb(199, 146, 234)">-</span><span class="token plain"> </span><span class="token key atrule">entityUrn</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> urn</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain">li</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain">corpGroup</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain">group.id</span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">entityType</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> corpGroup</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">aspectName</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> origin</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">changeType</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> UPSERT</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">aspect</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">type</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> NATIVE</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><p>Creating an entry in the <code>bootstrap_mcps.yaml</code> to populate the values from the environment variable <code>DATAHUB_TEST_GROUP_VALUES</code></p><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token punctuation" style="color:rgb(199, 146, 234)">-</span><span class="token plain"> </span><span class="token key atrule">name</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> test</span><span class="token punctuation" style="color:rgb(199, 146, 234)">-</span><span class="token plain">group</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">version</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> v1</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">mcps_location</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"bootstrap_mcps/test-group.yaml"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">values_env</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"DATAHUB_TEST_GROUP_VALUES"</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><p>An example json values are loaded from environment variable in <code>DATAHUB_TEST_GROUP_VALUES</code> might look like the following.</p><div class="language-json codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-json codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"group"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"id"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"mygroup"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"displayName"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"My Group"</span><span class="token punctuation" style="color:rgb(199, 146, 234)">,</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token property">"description"</span><span class="token operator" style="color:rgb(137, 221, 255)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"Description of the group"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"></span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><p>Using standard mustache template semantics the values in the environment would be inserted into the yaml structure
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and ingested when the <code>system-update</code> runs.</p><h4 class="anchor anchorWithStickyNavbar_LWe7" id="default-values">Default values<a href="#default-values" class="hash-link" aria-label="Direct link to Default values" title="Direct link to Default values"></a></h4><p>In the example above, the group's <code>description</code> if not provided would default to <code>Default description</code> if not specified
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in the values contain in the environment variable override following the standard mustache template semantics.</p><h4 class="anchor anchorWithStickyNavbar_LWe7" id="auditstamp">AuditStamp<a href="#auditstamp" class="hash-link" aria-label="Direct link to AuditStamp" title="Direct link to AuditStamp"></a></h4><p>A special template reference, <code>{{&auditStamp}}</code> can be used to inject an <code>auditStamp</code> into the aspect. This can be used to
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populate required fields of type <code>auditStamp</code> calculated from when the MCP is applied. This will insert an inline json representation
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of the <code>auditStamp</code> into the location and avoid escaping html characters per standard mustache template indicated by the <code>&</code> character.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="ingestion-template-mcps">Ingestion Template MCPs<a href="#ingestion-template-mcps" class="hash-link" aria-label="Direct link to Ingestion Template MCPs" title="Direct link to Ingestion Template MCPs"></a></h3><p>Ingestion template MCPs are slightly more complicated since the ingestion <code>recipe</code> is stored as a json string within the aspect.
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||
For ingestion recipes, special handling was added so that they can be described naturally in yaml instead of the normally encoded json string.</p><p>This means that in the example below, the structure beneath the <code>aspect.config.recipe</code> path will be automatically converted
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to the required json structure and stored as a string.</p><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token punctuation" style="color:rgb(199, 146, 234)">-</span><span class="token plain"> </span><span class="token key atrule">entityType</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> dataHubIngestionSource</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">entityUrn</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> urn</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain">li</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain">dataHubIngestionSource</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain">demo</span><span class="token punctuation" style="color:rgb(199, 146, 234)">-</span><span class="token plain">data</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">aspectName</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> dataHubIngestionSourceInfo</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">changeType</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> UPSERT</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">aspect</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">type</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"demo-data"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">name</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"demo-data"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">config</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">recipe</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">source</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">type</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token string" style="color:rgb(195, 232, 141)">"datahub-gc"</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">config</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">{</span><span class="token punctuation" style="color:rgb(199, 146, 234)">}</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">executorId</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> default</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><h2 class="anchor anchorWithStickyNavbar_LWe7" id="bootstrap_mcpsyaml-override"><code>bootstrap_mcps.yaml</code> Override<a href="#bootstrap_mcpsyaml-override" class="hash-link" aria-label="Direct link to bootstrap_mcpsyaml-override" title="Direct link to bootstrap_mcpsyaml-override"></a></h2><p>Additionally, the <code>bootstrap_mcps.yaml</code> can be overridden.
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This might be useful for applying changes to the version when using helm defined template values.</p><div class="language-yaml codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#bfc7d5;--prism-background-color:#292d3e"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-yaml codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#bfc7d5"><span class="token key atrule">bootstrap</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">templates</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token punctuation" style="color:rgb(199, 146, 234)">-</span><span class="token plain"> </span><span class="token key atrule">name</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> myMCPTemplate</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">version</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> v1</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">mcps_location</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> <classpath or file location</span><span class="token punctuation" style="color:rgb(199, 146, 234)">></span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">values_env</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> <value environment variable</span><span class="token punctuation" style="color:rgb(199, 146, 234)">></span><span class="token plain"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"> </span><span class="token key atrule">revision_env</span><span class="token punctuation" style="color:rgb(199, 146, 234)">:</span><span class="token plain"> REVISION_ENV</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><p>In the above example, we've added a <code>revision_env</code> which allows overriding the MCP bootstrap definition itself (excluding <code>revision_env</code>).</p><p>In this example we could configure <code>REVISION_ENV</code> to contain a timestamp or hash: <code>{"version":"2024060600"}</code>
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This value can be changed/incremented each time the helm supplied template values change. This ensures the MCP is updated
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with the latest values during deployment.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="known-limitations">Known Limitations<a href="#known-limitations" class="hash-link" aria-label="Direct link to Known Limitations" title="Direct link to Known Limitations"></a></h2><ul><li>Supported change types:<ul><li>UPSERT</li><li>CREATE</li><li>CREATE_ENTITY</li></ul></li></ul></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="slackUtm_uoBr"><div class="slackUtm_uoBr"><hr>Need more help? 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