adding openobserve details for fluentbit output

Author: Chaitanya Sistla

pipeline/outputs/openobserve.md

@@ -0,0 +1,44 @@
+---
+description: Send logs to OpenObserve using Fluent Bit
+---
+
+# OpenObserve
+
+The OpenObserve output plugin allows to ingest your logs into [OpenObserve](https://openobserve.ai/).
+
+Before you begin, you need a [OpenObserve account](https://cloud.openobserve.ai/), a HTTP_User and HTTP_Passwd that will be available under Ingestion of your O2 platform. Alternatively, you can achieve this with various installation types as mentioned in this [documentation](https://openobserve.ai/docs/quickstart/)
+
+## Configuration Parameters
+
+| Key             | Description                                                                                                                                                                                                                                                                                                                                                                                                                                | Default                          |
+| --------------- | -----------------------------------------------------------------------------------------------------------------------------------------------------------------                                                                                                                                                                                                                                                                          | -------------------------------- |
+| Host            | _Required_ - The OpenObserve server where you are sending your logs.                                                                                                                                                                                                                                                                                                                                                                           | `localhost` |
+| TLS             | _Required_ - Enable end-to-end security using TLS. Set to `on` to enable TLS communication with OpenObserve.                                                                                                                                                                                                                                                                                                                                | `on`                            |
+| compress        | _Recommended_ - Compresses the payload in GZIP format. OpenObserve supports and recommends setting this to `gzip` for optimized log ingestion.                                                                                                                                                                                                                                                                                                                             |                                  |
+| HTTP_User          | _Required_ - Username for HTTP authentication.                                                                                                                                                                                                                                                                                                                                                       |                                  |
+| HTTP_Passwd          | _Required_ - Password for HTTP authentication.                                                                                                                                                                                                                                                                                                                                                       |                                  |
+| URI        | _Required_ - The API path where the logs will be sent.                                                                                                                                                                                                                                                                                                                                                           |         `/api/default/default/_json`                         |
+| Format        | _Required_ - The format of the log payload. OpenObserve expects json.                                                                                                                                                                                                                                                                                                                                                           |         `json`                         |
+| json_date_key   | _Optional_ The JSON key used for timestamps in the logs.                                                                                                                                                                                                                                                                                                                                                                                                                  | `timestamp`                      |
+| json_date_format   | _Optional_ The format of the date in logs. OpenObserve supports iso8601.                                                                                                                                                                                                                                                                                                                                                                                                                  | `iso8601`                      |
+| include_tag_key | If enabled, a tag is appended to output. The key name is used `tag_key` property.                                                                                                                                                                                                                                                                                                                                                          | `false`                          |
+
+### Configuration File
+
+Get started quickly with this configuration file:
+
+```
+[OUTPUT]
+  Name http
+  Match *
+  URI /api/default/default/_json
+  Host localhost
+  Port 5080
+  tls Off
+  Format json
+  Json_date_key    _timestamp
+  Json_date_format iso8601
+  HTTP_User <your_http_user>
+  HTTP_Passwd <your_http_password>
+  compress gzip
+```