This article explains how to install the td-agent deb package, the stable Fluentd distribution package maintained by Treasure Data, Inc.

What is td-agent?

Fluentd is written in Ruby for flexibility, with performance sensitive parts written in C. However, some users may have difficulty installing and operating a Ruby daemon.

That's why Treasure Data, Inc is providing the stable distribution of Fluentd, called td-agent. The differences between Fluentd and td-agent can be found here.

This installation guide is for td-agent v3, the new stable version. td-agent v3 uses fluentd v1.0 in the core. See this page for the comparison between v2 and v3.

Step 0: Before Installation

Please follow the Preinstallation Guide to configure your OS properly. This will prevent many unnecessary problems.

Step 1: Install from Apt Repository

For Ubuntu, we currently support "Ubuntu 18.04 LTS / Bionic 64bit", "Ubuntu 16.04 LTS / Xenial 64bit", "Ubuntu 14.04 LTS / Trusty 64bit". For Debian, we currently support "Debian 9 Stretch 64bit", "Debian 8 Jessie 64bit".

A shell script is provided to automate the installation process for each version. The shell script registers a new apt repository at /etc/apt/sources.list.d/treasure-data.list and installs the td-agent deb package.

For Ubuntu Bionic,

curl -L https://toolbelt.treasuredata.com/sh/install-ubuntu-bionic-td-agent3.sh | sh

For Ubuntu Xenial,

curl -L https://toolbelt.treasuredata.com/sh/install-ubuntu-xenial-td-agent3.sh | sh

For Ubuntu Trusty,

curl -L https://toolbelt.treasuredata.com/sh/install-ubuntu-trusty-td-agent3.sh | sh

For Debian Stretch,

curl -L https://toolbelt.treasuredata.com/sh/install-debian-stretch-td-agent3.sh | sh

For Debian Jessie,

curl -L https://toolbelt.treasuredata.com/sh/install-debian-jessie-td-agent3.sh | sh

It's HIGHLY recommended that you set up ntpd on the node to prevent invalid timestamps in your logs. Please check the Preinstallation Guide.

Step 2: Launch Daemon

systemd

The /lib/systemd/system/td-agent script is provided to start, stop, or restart the agent.

$ sudo systemctl start td-agent.service
$ sudo systemctl status td-agent.service
● td-agent.service - td-agent: Fluentd based data collector for Treasure Data
   Loaded: loaded (/lib/systemd/system/td-agent.service; disabled; vendor preset: enabled)
   Active: active (running) since Thu 2017-12-07 15:12:27 PST; 6min ago
     Docs: https://docs.treasuredata.com/articles/td-agent
  Process: 53192 ExecStart = /opt/td-agent/embedded/bin/fluentd --log /var/log/td-agent/td-agent.log --daemon /var/run/td-agent/td-agent.pid (code = exited, statu
 Main PID: 53198 (fluentd)
   CGroup: /system.slice/td-agent.service
           ├─53198 /opt/td-agent/embedded/bin/ruby /opt/td-agent/embedded/bin/fluentd --log /var/log/td-agent/td-agent.log --daemon /var/run/td-agent/td-agent
           └─53203 /opt/td-agent/embedded/bin/ruby -Eascii-8bit:ascii-8bit /opt/td-agent/embedded/bin/fluentd --log /var/log/td-agent/td-agent.log --daemon /v
​
Dec 07 15:12:27 ubuntu systemd[1]: Starting td-agent: Fluentd based data collector for Treasure Data...
Dec 07 15:12:27 ubuntu systemd[1]: Started td-agent: Fluentd based data collector for Treasure Data.

If you want to customize systemd behaviour, put your td-agent.service into /etc/systemd/system

init.d

The /etc/init.d/td-agent script is provided to start, stop, or restart the agent.

$ sudo /etc/init.d/td-agent restart
$ sudo /etc/init.d/td-agent status
td-agent (pid  21678) is running...

The following commands are supported:

$ sudo /etc/init.d/td-agent start
$ sudo /etc/init.d/td-agent stop
$ sudo /etc/init.d/td-agent restart
$ sudo /etc/init.d/td-agent status

Please make sure your configuration file is located at /etc/td-agent/td-agent.conf.

Step 3: Post Sample Logs via HTTP

By default, /etc/td-agent/td-agent.conf is configured to take logs from HTTP and route them to stdout (/var/log/td-agent/td-agent.log). You can post sample log records using the curl command.

$ curl -X POST -d 'json={"json":"message"}' http://localhost:8888/debug.test

Next Steps

You're now ready to collect your real logs using Fluentd. Please see the following tutorials to learn how to collect your data from various data sources.

• Basic Configuration

  • ​Config File​

• Application Logs

  • ​Ruby, Java, Python, PHP,

    ​Perl, Node.js, Scala​

• Examples

  • ​Store Apache Log into Amazon S3​

  • ​Store Apache Log into MongoDB​

  • ​Data Collection into HDFS​

Please refer to the resources below for further steps.

• ​ChangeLog of td-agent​

• ​Chef Cookbook​

If this article is incorrect or outdated, or omits critical information, please let us know. Fluentd is a open source project under Cloud Native Computing Foundation (CNCF). All components are available under the Apache 2 License.