70 lines
1.9 KiB
Markdown
Executable File
70 lines
1.9 KiB
Markdown
Executable File
---
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layout: default
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title: Configuration
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parent: OpenSearch
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nav_order: 1
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---
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# OpenSearch configuration
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Most OpenSearch configuration can take place in the cluster settings API. Certain operations require you to modify `opensearch.yml` and restart the cluster.
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Whenever possible, use the cluster settings API instead; `opensearch.yml` is local to each node, whereas the API applies the setting to all nodes in the cluster.
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## Cluster settings API
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The first step in changing a setting is to view the current settings:
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```
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GET _cluster/settings?include_defaults=true
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```
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For a more concise summary of non-default settings:
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```
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GET _cluster/settings
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```
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Three categories of setting exist in the cluster settings API: persistent, transient, and default. Persistent settings, well, persist after a cluster restart. After a restart, OpenSearch clears transient settings.
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If you specify the same setting in multiple places, OpenSearch uses the following precedence:
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1. Transient settings
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2. Persistent settings
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3. Settings from `opensearch.yml`
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4. Default settings
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To change a setting, just specify the new one as either persistent or transient. This example shows the flat settings form:
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```json
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PUT /_cluster/settings
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{
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"persistent" : {
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"action.auto_create_index" : false
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}
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}
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```
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You can also use the expanded form, which lets you copy and paste from the GET response and change existing values:
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```json
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PUT /_cluster/settings
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{
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"persistent": {
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"action": {
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"auto_create_index": false
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}
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}
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}
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```
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---
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## Configuration file
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You can find `opensearch.yml` in `/usr/share/opensearch/config/opensearch.yml` (Docker) or `/etc/opensearch/opensearch.yml` (RPM and DEB) on each node.
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The demo configuration includes a number of settings for the security plugin that you should modify before using OpenSearch for a production workload. To learn more, see [Security](../../security/).
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