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<h2 class="title"><a id="_usage_example"></a>Usage example<a class="edit_me" rel="nofollow" title="Edit this page on GitHub" href="https://github.com/elastic/elasticsearch/edit/8.10/docs/reference/indices/ignore-missing-component-templates.asciidoc">edit</a></h2>
</div></div></div>
<p>In the following, one component template and an index template are created. The index template references two component templates, but only the <code class="literal">@package</code> one exists.</p>
<p>Create the component template <code class="literal">logs-foo_component1</code>. This has to be created before the index template as it is not optional:</p>
<div class="pre_wrapper lang-ruby alternative">
<pre class="programlisting prettyprint lang-ruby alternative">response = client.cluster.put_component_template(
name: 'logs-foo_component1',
body: {
template: {
mappings: {
properties: {
"host.name": {
type: 'keyword'
}
}
}
}
}
)
puts response</pre>
</div>
<a id="657cf67bbc48f3b8c7fa15e275a5ef72"></a>
<div class="pre_wrapper lang-console default has-ruby">
<pre class="programlisting prettyprint lang-console default has-ruby">PUT _component_template/logs-foo_component1
{
"template": {
"mappings": {
"properties": {
"host.name": {
"type": "keyword"
}
}
}
}
}</pre>
</div>
<div class="console_widget has-ruby" data-snippet="snippets/608.console"></div>
<p>Next, the index template will be created and it references two component templates:</p>
<div class="pre_wrapper lang-JSON">
<pre class="programlisting prettyprint lang-JSON"> "composed_of": ["logs-foo_component1", "logs-foo_component2"]</pre>
</div>
<p>Before, only the <code class="literal">logs-foo_component1</code> compontent template was created, meaning the <code class="literal">logs-foo_component2</code> is missing. Because of this the following entry was added to the config:</p>
<div class="pre_wrapper lang-JSON">
<pre class="programlisting prettyprint lang-JSON"> "ignore_missing_component_templates": ["logs-foo_component2"],</pre>
</div>
<p>During creation of the template, it will not validate that <code class="literal">logs-foo_component2</code> exists:</p>
<div class="pre_wrapper lang-ruby alternative">
<pre class="programlisting prettyprint lang-ruby alternative">response = client.indices.put_index_template(
name: 'logs-foo',
body: {
index_patterns: [
'logs-foo-*'
],
data_stream: {},
composed_of: [
'logs-foo_component1',
'logs-foo_component2'
],
ignore_missing_component_templates: [
'logs-foo_component2'
],
priority: 500
}
)
puts response</pre>
</div>
<a id="1b47d988b218ee595430ec91eba91d80"></a>
<div class="pre_wrapper lang-console default has-ruby">
<pre class="programlisting prettyprint lang-console default has-ruby">PUT _index_template/logs-foo
{
"index_patterns": ["logs-foo-*"],
"data_stream": { },
"composed_of": ["logs-foo_component1", "logs-foo_component2"],
"ignore_missing_component_templates": ["logs-foo_component2"],
"priority": 500
}</pre>
</div>
<div class="console_widget has-ruby" data-snippet="snippets/609.console"></div>
<p>The index template <code class="literal">logs-foo</code> was successfully created. A data stream can be created based on this template:</p>
<div class="pre_wrapper lang-ruby alternative">
<pre class="programlisting prettyprint lang-ruby alternative">response = client.indices.create_data_stream(
name: 'logs-foo-bar'
)
puts response</pre>
</div>
<a id="1452829804551d2d6acedd4e73b29637"></a>
<div class="pre_wrapper lang-console default has-ruby">
<pre class="programlisting prettyprint lang-console default has-ruby">PUT _data_stream/logs-foo-bar</pre>
</div>
<div class="console_widget has-ruby" data-snippet="snippets/610.console"></div>
<p>Looking at the mappings of the data stream, it will contain the <code class="literal">host.name</code> field.</p>
<p>At a later stage, the missing component template might be added:</p>
<div class="pre_wrapper lang-ruby alternative">
<pre class="programlisting prettyprint lang-ruby alternative">response = client.cluster.put_component_template(
name: 'logs-foo_component2',
body: {
template: {
mappings: {
properties: {
"host.ip": {
type: 'ip'
}
}
}
}
}
)
puts response</pre>
</div>
<a id="ce899fcf55da72fc32e623d1ad88b301"></a>
<div class="pre_wrapper lang-console default has-ruby">
<pre class="programlisting prettyprint lang-console default has-ruby">PUT _component_template/logs-foo_component2
{
"template": {
"mappings": {
"properties": {
"host.ip": {
"type": "ip"
}
}
}
}
}</pre>
</div>
<div class="console_widget has-ruby" data-snippet="snippets/611.console"></div>
<p>This will not have an immediate effect on the data stream. The mapping <code class="literal">host.ip</code> will only show up in the data stream mappings when the data stream is rolled over automatically next time or a manual rollover is triggered:</p>
<div class="pre_wrapper lang-ruby alternative">
<pre class="programlisting prettyprint lang-ruby alternative">response = client.indices.rollover(
alias: 'logs-foo-bar'
)
puts response</pre>
</div>
<a id="0d59af9dc556dc526b9394051efa800a"></a>
<div class="pre_wrapper lang-console default has-ruby">
<pre class="programlisting prettyprint lang-console default has-ruby">POST logs-foo-bar/_rollover</pre>
</div>
<div class="console_widget has-ruby" data-snippet="snippets/612.console"></div>
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