Create logentries.md (#244)

* Create logentries.md

Signed-off-by: Carlos Alexandro Becker <caarlos0@gmail.com>

_data/toc.yaml

@@ -161,6 +161,8 @@ toc:
         title: Configuring Logging Drivers
       - path: /engine/admin/logging/log_tags/
         title: Log tags for logging driver
+      - path: engine/admin/logging/logentries/
+        title: Logentries logging driver
       - path: /engine/admin/logging/awslogs/
         title: Amazon CloudWatch Logs logging driver
       - path: /engine/admin/logging/etwlogs/

engine/admin/logging/logentries.md

@@ -0,0 +1,48 @@
+---
+title: Logentries logging driver
+description: Describes how to use the logentries logging driver.
+keywords: logentries, docker, logging, driver
+---
+
+The `logentries` logging driver sends container logs to the
+[Logentries](https://logentries.com/) server.
+
+## Usage
+
+Some options are supported by specifying `--log-opt` as many times as needed:
+
+ - `logentries-token`: specify the logentries log set token
+
+Configure the default logging driver by passing the
+`--log-driver` option to the Docker daemon:
+
+```bash
+$ dockerd --log-driver=logentries
+```
+
+To set the logging driver for a specific container, pass the
+`--log-driver` option to `docker run`:
+
+```bash
+$ docker run --log-driver=logentries ...
+```
+
+Before using this logging driver, you'll need to create a new Log Set in the
+Logentries web interface. Then, you'll need to pass the token of that log set
+to Docker:
+
+```bash
+$ docker run --log-driver=logentries --log-opt logentries-token=abcd1234-12ab-34cd-5678-0123456789ab
+```
+
+## Options
+
+Users can use the `--log-opt NAME=VALUE` flag to specify additional Logentries logging driver options.
+
+### logentries-token
+
+You need to provide your log set token for logentries driver to work:
+
+```bash
+$ docker run --log-driver=logentries --log-opt logentries-token=abcd1234-12ab-34cd-5678-0123456789ab
+```