feat: add `overwrite-pid-file` and `pid-file` (#5972)

* feat: add `overwrite-pid-file` and `pid-file` 

Add documentation for `overwrite-pid-file` and `pid-file` configuration options available in v2.7.11.

* Update content/influxdb/v2/reference/config-options.md

* Update content/influxdb/v2/reference/config-options.md

* added new influxd pid flags to data file

---------

Co-authored-by: Jason Stirnaman <jstirnaman@influxdata.com>
Co-authored-by: Scott Anderson <scott@influxdata.com>

content/influxdb/v2/reference/config-options.md

@@ -153,6 +153,8 @@ To configure InfluxDB, use the following configuration options when starting the
 - [nats-max-payload-bytes](#nats-max-payload-bytes) <em style="opacity:.65">- (deprecated)</em>
 - [nats-port](#nats-port) <em style="opacity:.65">- (deprecated)</em>
 - [no-tasks](#no-tasks)
+- [overwrite-pid-file](#overwrite-pid-file)
+- [pid-file](#pid-file)
 - [pprof-disabled](#pprof-disabled)
 - [query-concurrency](#query-concurrency)
 - [query-initial-memory-bytes](#query-initial-memory-bytes)
@@ -1333,6 +1335,104 @@ no-tasks = true
 
 ---
 
+### overwrite-pid-file
+Overwrite the PID file specified by [pid-file](#pid-file) if it exists, instead of exiting with an error.
+
+**Default:** `false`
+
+| influxd flag           | Environment variable         | Configuration key    |
+| :--------------------- | :--------------------------- | :------------------- |
+| `--overwrite-pid-file` | `INFLUXD_OVERWRITE_PID_FILE` | `overwrite-pid-file` |
+
+###### influxd flag
+<!--pytest.mark.skip-->
+
+```sh
+influxd --overwrite-pid-file
+```
+
+###### Environment variable
+```sh
+export INFLUXD_OVERWRITE_PID_FILE=true
+```
+
+###### Configuration file
+{{< code-tabs-wrapper >}}
+{{% code-tabs %}}
+[YAML](#)
+[TOML](#)
+[JSON](#)
+{{% /code-tabs %}}
+{{% code-tab-content %}}
+```yml
+overwrite-pid-file: true
+```
+{{% /code-tab-content %}}
+{{% code-tab-content %}}
+```toml
+overwrite-pid-file = true
+```
+{{% /code-tab-content %}}
+{{% code-tab-content %}}
+```json
+{
+  "overwrite-pid-file": true
+}
+```
+{{% /code-tab-content %}}
+{{< /code-tabs-wrapper >}}
+
+---
+
+### pid-file
+Write the PID file to the specified path and remove it when InfluxDB stops.
+
+**Default:** ``
+
+| influxd flag | Environment variable | Configuration key |
+|------------- | :------------------- | :---------------- |
+| `--pid-file` | `INFLUXD_PID_FILE`   | `pid-file`        |
+
+###### influxd flag
+<!--pytest.mark.skip-->
+
+```sh
+influxd --pid-file /path/to/pid-file
+```
+
+###### Environment variable
+```sh
+export INFLUXD_PID_FILE=/path/to/pid-file
+```
+
+###### Configuration file
+{{< code-tabs-wrapper >}}
+{{% code-tabs %}}
+[YAML](#)
+[TOML](#)
+[JSON](#)
+{{% /code-tabs %}}
+{{% code-tab-content %}}
+```yml
+pid-file: /path/to/pid-file
+```
+{{% /code-tab-content %}}
+{{% code-tab-content %}}
+```toml
+pid-file = "/path/to/pid-file"
+```
+{{% /code-tab-content %}}
+{{% code-tab-content %}}
+```json
+{
+  "pid-file": "/path/to/pid-file"
+}
+```
+{{% /code-tab-content %}}
+{{< /code-tabs-wrapper >}}
+
+---
+
 ### pprof-disabled
 Disable the `/debug/pprof` HTTP endpoint.
 This endpoint provides runtime profiling data and can be helpful when debugging.

data/influxd_flags.yml

@@ -77,6 +77,12 @@
 - flag: "--no-tasks"
   added: 2.0
 
+- flag: "--overwrite-pid-file"
+  added: 2.7
+
+- flag: "--pid-file"
+  added: 2.7
+
 - flag: "--pprof-disabled"
   added: 2.0