> For the complete documentation index, see [llms.txt](https://docs.fluentd.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fluentd.org/0.12/container-deployment/install-by-docker.md).
# Docker Image
This article explains how to use [Fluentd's official Docker image](https://hub.docker.com/r/fluent/fluentd/), maintained by [Treasure Data, Inc](http://www.treasuredata.com/).
* [Fluentd's official Docker image](https://hub.docker.com/r/fluent/fluentd/)
* [Fluentd's official Docker image (Source)](https://github.com/fluent/fluentd-docker-image)
## Step 0: Install Docker
Please download and install [Docker](https://www.docker.com/) from here.
* [Docker Installation](https://docs.docker.com/engine/installation/)
## Step 1: Pull Fluentd's Docker image
Then, please download Fluentd v0.12's image by `docker pull` command.
```
$ docker pull fluent/fluentd:v0.12-debian
```
Debian and Alpine Linux version is available for Fluentd image. Debian version is recommended officially since it has jemalloc support, however Alpine image is smaller.
## Step 2: Launch Fluentd Container
To make the test simple, create the example config below at `/tmp/fluentd.conf`. This example accepts records from http, and output to stdout.
```
# /tmp/fluentd.conf
@type http
port 9880
bind 0.0.0.0
@type stdout
```
Finally, you can run Fluentd with `docker run` command.
```
$ docker run -d \
-p 9880:9880 -v /tmp:/fluentd/etc -e FLUENTD_CONF=fluentd.conf \
fluent/fluentd
2017-01-30 11:52:23 +0000 [info]: reading config file path="/fluentd/etc/fluentd.conf"
2017-01-30 11:52:23 +0000 [info]: starting fluentd-0.12.31
2017-01-30 11:52:23 +0000 [info]: gem 'fluentd' version '0.12.31'
2017-01-30 11:52:23 +0000 [info]: adding match pattern="**" type="stdout"
2017-01-30 11:52:23 +0000 [info]: adding source type="http"
2017-01-30 11:52:23 +0000 [info]: using configuration file:
@type http
port 9880
bind 0.0.0.0
@type stdout
```
## Step3: Post Sample Logs via HTTP
Let's post sample logs via HTTP and confirm it's working. `curl` command is always your friend.
```
$ curl -X POST -d 'json={"json":"message"}' http://localhost:9880/sample.test
```
Use `docker ps` command to retrieve container ID, and use `docker logs` command to check the specific container's log.
```
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
b495e527850c fluent/fluentd "/bin/sh -c 'exec ..." 2 hours ago Up 2 hours 5140/tcp, 24224/tcp, 0.0.0.0:9880->9880/tcp awesome_mcnulty
$ docker logs b495e527850c | tail -n 1
2017-01-30 14:04:37 +0000 sample.test: {"json":"message"}
```
## Next Steps
Now you know how to use Fluentd via Docker. Here're a couple of Docker related documentations for Fluentd.
* [Fluentd's official Docker image](https://hub.docker.com/r/fluent/fluentd/)
* [Fluentd's official Docker image (Source)](https://github.com/fluent/fluentd-docker-image)
* [Docker Logging Driver and Fluentd](/0.12/articles/docker-logging.md)
* [Docker Logging via EFK (Elasticsearch + Fluentd + Kibana) Stack with Docker Compose](/0.12/articles/docker-logging-efk-compose.md)
Also, please see the following tutorials to learn how to collect your data from various data sources.
* Basic Configuration
* [Config File](/0.12/configuration/config-file.md)
* Application Logs
* [Ruby](/0.12/articles/ruby.md), [Java](/0.12/articles/java.md), [Python](/0.12/articles/python.md), [PHP](/0.12/articles/php.md),
[Perl](/0.12/articles/perl.md), [Node.js](/0.12/articles/nodejs.md), [Scala](/0.12/articles/scala.md)
* Examples
* [Store Apache Log into Amazon S3](/0.12/articles/apache-to-s3.md)
* [Store Apache Log into MongoDB](/0.12/articles/apache-to-mongodb.md)
* [Data Collection into HDFS](/0.12/articles/http-to-hdfs.md)
If this article is incorrect or outdated, or omits critical information, please [let us know](https://github.com/fluent/fluentd-docs-gitbook/issues?state=open). [Fluentd](http://www.fluentd.org/) is a open source project under [Cloud Native Computing Foundation (CNCF)](https://cncf.io/). All components are available under the Apache 2 License.
---
# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.
## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.
Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:
```
GET https://docs.fluentd.org/0.12/container-deployment/install-by-docker.md?ask=&goal=
```
`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.
Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.