# Install by DEB Package v3 (Debian/Ubuntu) This article explains how to install the `td-agent` deb package, the stable Fluentd distribution package maintained by [Treasure Data, Inc](http://www.treasuredata.com/). ## What is `td-agent`? Fluentd is written in Ruby for flexibility, with performance-sensitive parts in C. However, some users may have difficulty installing and operating a Ruby daemon. That is why [Treasure Data, Inc](http://www.treasuredata.com/) provides **the stable distribution of Fluentd**, called `td-agent`. The differences between Fluentd and `td-agent` can be found [here](https://www.fluentd.org/faqs). ## Installing `td-agent` {% hint style="danger" %} This article contains deprecated td-agent (EOL) information: SHOULD NOT use td-agent anymore. * As [Treasure Agent (td-agent) 3 will not be maintained anymore](https://www.fluentd.org/blog/schedule-for-td-agent-3-eol), recommend to [Upgrade td-agent from v3 to v4](https://www.fluentd.org/blog/upgrade-td-agent-v3-to-v4). * Do not directly upgrade from v3 to fluent-package v5. Such a workflow is not supported. It causes a trouble. Upgrade in stages. (v3 to v4, then v4 to v5) * Package archive was migrated from [packages.treasuredata.com](https://packages.treasuredata.com) to [fluentd.cdn.cncf.io](https://fluentd.cdn.cncf.io/index.html). Need to migrate URI in treasure-data.list by yourself or just disable it. {% endhint %} ### Step 0: Before Installation Please follow the [Pre-installation Guide](/installation/before-install.md) to configure your OS properly. ### Step 1: Install from Apt Repository NOTE: If your OS is not supported, consider [gem installation](/installation/install-by-gem.md) instead. 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: ```bash # td-agent 3 (EOL) curl -fsSL https://toolbelt.treasuredata.com/sh/install-ubuntu-bionic-td-agent3.sh | sh ``` For Ubuntu Xenial: ```bash # td-agent 3 (EOL) curl -fsSL https://toolbelt.treasuredata.com/sh/install-ubuntu-xenial-td-agent3.sh | sh ``` For Debian Buster: ```bash # td-agent 3 (EOL) curl -fsSL https://toolbelt.treasuredata.com/sh/install-debian-buster-td-agent3.sh | sh ``` ### Step 2: Launch Daemon ### `systemd` Use `/lib/systemd/system/td-agent` script 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; enabled; vendor preset: enabled) Active: active (running) since Tue 2022-09-20 05:28:25 JST; 1 week 0 days ago Docs: https://docs.treasuredata.com/display/public/PD/About+Treasure+Data%27s+Server-Side+Agent Main PID: 2417 (fluentd) Tasks: 8 (limit: 38328) Memory: 52.2M CPU: 56.868s CGroup: /system.slice/td-agent.service ├─2417 /opt/td-agent/bin/ruby /opt/td-agent/bin/fluentd --log /var/log/td-agent/td-agent.log --daemon /var/run/td-agent/td-agent.pid └─2420 /opt/td-agent/bin/ruby -Eascii-8bit:ascii-8bit /opt/td-agent/bin/fluentd --log /var/log/td-agent/td-agent.log --daemon /var/run/td-agent/t> Sept 9 20 05:28:24 Ryzen systemd[1]: Starting td-agent: Fluentd based data collector for Treasure Data... Sept 9 20 05:28:25 Ryzen systemd[1]: Started td-agent: Fluentd based data collector for Treasure Data. ``` To customize `systemd` behavior, put your `td-agent.service` in `/etc/systemd/system`. NOTE: In td-agent 4, path is different. `/opt/td-agent/bin` instead of `/opt/td-agent/embedded/bin` #### `init.d` For non systemd-based system, use `/etc/init.d/td-agent` script 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 path is: ``` /etc/td-agent/td-agent.conf ``` ### Step 3: Post Sample Logs via HTTP The default configuration (`/etc/td-agent/td-agent.conf`) is to receive logs at an HTTP endpoint and route them to `stdout`. For `td-agent` logs, see `/var/log/td-agent/td-agent.log`. You can post sample log records with `curl` command: ``` $ curl -X POST -d 'json={"json":"message"}' http://localhost:8888/debug.test $ tail -n 1 /var/log/td-agent/td-agent.log 2018-01-01 17:51:47 -0700 debug.test: {"json":"message"} ``` ## Next Steps You are now ready to collect real logs with Fluentd. Refer to the following tutorials on how to collect data from various sources: * Basic Configuration * [Config File](/configuration/config-file.md) * Application Logs * [Ruby](/language-bindings/ruby.md), [Java](/language-bindings/java.md), [Python](/language-bindings/python.md), [PHP](/language-bindings/php.md), [Perl](/language-bindings/perl.md), [Node.js](/language-bindings/nodejs.md), [Scala](/language-bindings/scala.md) * Examples * [Store Apache Log into Amazon S3](/how-to-guides/apache-to-s3.md) * [Store Apache Log into MongoDB](/how-to-guides/apache-to-mongodb.md) * [Data Collection into HDFS](/how-to-guides/http-to-hdfs.md) For further steps, follow these: * [ChangeLog of `td-agent`](https://docs.treasuredata.com/display/public/PD/The+td-agent+Change+Log) * [Chef Cookbook](https://github.com/treasure-data/chef-td-agent/) 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 an open-source project under [Cloud Native Computing Foundation (CNCF)](https://cncf.io/). All components are available under the Apache 2 License. --- # Agent Instructions: 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: ``` GET https://docs.fluentd.org/installation/obsolete-installation/treasure-agent-v3-eol-installation/install-by-deb-td-agent-v3.md?ask= ``` The question should be specific, self-contained, and written in natural language. 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.