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[SPARK-49049][DOCS] Document MasterPage custom title conf and REST API server-side env variable replacements #47523

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[SPARK-49049][DOCS] Document MasterPage custom title conf and REST API server-side env variable replacements #47523

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[SPARK-49049][DOCS] Document MasterPage custom title conf and REST AP…
dongjoon-hyun Jul 29, 2024
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dongjoon-hyun Jul 29, 2024
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Update docs/spark-standalone.md
dongjoon-hyun Jul 29, 2024
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29 changes: 28 additions & 1 deletion docs/spark-standalone.md
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Expand Up @@ -210,6 +210,15 @@ SPARK_MASTER_OPTS supports the following system properties:
</td>
<td>1.1.0</td>
</tr>
<tr>
<td><code>spark.master.ui.title</code></td>
<td>(None)</td>
<td>
Specifies the title of the Master UI page. If unset, <code>Spark Master at 'master url'</code>
is used by default.
</td>
<td>4.0.0</td>
</tr>
<tr>
<td><code>spark.master.ui.decommission.allow.mode</code></td>
<td><code>LOCAL</code></td>
Expand Down Expand Up @@ -601,7 +610,9 @@ via <code>http://[host:port]/[version]/submissions/[action]</code> where
<thead><tr><th>Command</th><th>Description</th><th>HTTP METHOD</th><th>Since Version</th></tr></thead>
<tr>
<td><code>create</code></td>
<td>Create a Spark driver via <code>cluster</code> mode.</td>
<td>Create a Spark driver via <code>cluster</code> mode. Since 4.0.0, Spark master supports server-side
variable replacements for the values of Spark properties and environment variables.
</td>
<td>POST</td>
<td>1.3.0</td>
</tr>
Expand Down Expand Up @@ -665,6 +676,22 @@ The following is the response from the REST API for the above <code>create</code
}
```

For <code>sparkProperties</code> and <code>environmentVariables</code>, users can use place
holders for server-side environment variables like the following.

```bash
{% raw %}
...
"sparkProperties": {
"spark.hadoop.fs.s3a.endpoint": "{{AWS_ENDPOINT_URL}}",
"spark.hadoop.fs.s3a.endpoint.region": "{{AWS_REGION}}"
},
"environmentVariables": {
"AWS_CA_BUNDLE": "{{AWS_CA_BUNDLE}}"
},
...
{% endraw %}
```

# Resource Scheduling

Expand Down