Skip to content
Tools
/
/
Perl Apps Import
Last updated

Perl Apps Import Integration

td-agent was discontinued in December 2023 and has been replaced by fluent-package. The fluent-package is the official successor maintained by the Cloud Native Computing Foundation.

Treasure Data provides Fluentd to collect server-side logs and events and to seamlessly import the data from Perl applications.

Prerequisites

  • Basic knowledge of Perl and CPAN.
  • Basic knowledge of Treasure Data.
  • Perl 5.26 or higher (for local testing).

Installing Fluentd

Install Fluentd (fluent-package) on your application servers. Fluentd sits within your application servers, focusing on uploading application logs to the cloud.

The fluent-logger-perl library enables Perl applications to post records to their local Fluentd. Fluentd, in turn, uploads the data to the cloud every 5 minutes. Because the daemon runs on a local node, the logging latency is negligible.

Fluentd (fluent-package) Install Options

td-agent was discontinued in December 2023 and has been replaced by fluent-package. The fluent-package is the official successor maintained by the Cloud Native Computing Foundation. For migration guidance from td-agent, see Fluentd Installation Guide.

To install fluent-package, run one of the following commands based on your environment.

RHEL/CentOS/Rocky Linux

# fluent-package 6 LTS (recommended)
curl -fsSL https://fluentd.cdn.cncf.io/sh/install-redhat-fluent-package6-lts.sh | sh

Ubuntu

# Ubuntu 24.04 Noble - fluent-package 6 LTS
curl -fsSL https://fluentd.cdn.cncf.io/sh/install-ubuntu-noble-fluent-package6-lts.sh | sh

# Ubuntu 22.04 Jammy - fluent-package 6 LTS
curl -fsSL https://fluentd.cdn.cncf.io/sh/install-ubuntu-jammy-fluent-package6-lts.sh | sh

Debian

# Debian Bookworm - fluent-package 6 LTS
curl -fsSL https://fluentd.cdn.cncf.io/sh/install-debian-bookworm-fluent-package6-lts.sh | sh

Amazon Linux

# Amazon Linux 2023 - fluent-package 6 LTS
curl -fsSL https://fluentd.cdn.cncf.io/sh/install-amazon2023-fluent-package6-lts.sh | sh

Windows

Download the MSI installer from:

After installation:

  1. Edit the configuration file at C:/opt/fluent/etc/fluent/fluentd.conf
  2. Start the service using net start fluentdwinsvc or via Services administrative tool

macOS

fluent-package for macOS is planned to be available via Homebrew. For current installation options, see Fluentd Installation Guide.

Starting the Service

After installation, start and verify the Fluentd service.

Linux

sudo systemctl start fluentd.service
sudo systemctl status fluentd.service

The configuration file is located at /etc/fluent/fluentd.conf.

Windows

net start fluentdwinsvc

The configuration file is located at C:\opt\fluent\etc\fluent\fluentd.conf.

macOS (gem installation)

fluentd -c /path/to/fluentd.conf

For more details, see the Fluentd Documentation.

Modifying fluentd.conf

Specify your API key by setting the apikey option in your /etc/fluent/fluentd.conf file (for fluent-package). You can view your API key from your profile in TD Console.

# Treasure Data Input and Output
<source>
  @type forward
  port 24224
</source>

<match td.*.*>
  @type tdlog
  endpoint api.treasuredata.com
  apikey YOUR_API_KEY
  auto_create_table
  use_ssl true
  <buffer>
    @type file
    path /var/log/fluent/buffer/td
  </buffer>
</match>

YOUR_API_KEY should be your actual apikey string. You can retrieve your API key from your profiles in TD Console. Using a write-only API key is recommended.

Restart the Fluentd service when the following lines are in place.

# Linux
sudo systemctl restart fluentd.service

# macOS (gem installation)
# Restart the Fluentd process manually

Fluentd now accepts data via port 24224, buffers the data (/var/log/fluent/buffer/td), and automatically uploads the data into the cloud.

Using fluent-logger-perl

First, install the Fluent::Logger library via CPAN.

$ cpan
cpan[1]> install Fluent::Logger

Next, initialize and post the records as follows.

test.pl

use Fluent::Logger;
my $logger = Fluent::Logger->new(
    host => '127.0.0.1',
    port => 24224,
    tag_prefix => 'td.test_db',
);
$logger->post("test_table", { "entry1" => "value1", "entry2" => 2 });

Confirming Data Import

First, execute the preceding program.

$ perl test.pl

Sending a SIGUSR1 signal flushes Fluentd's buffer. Upload starts immediately.

# Linux
$ kill -USR1 $(cat /var/run/fluent/fluentd.pid)

# macOS (gem installation)
# Send SIGUSR1 to the Fluentd process

To confirm that your data has been uploaded successfully, issue the td tables command as follows:

$ td tables
+------------+------------+------+-----------+
| Database   | Table      | Type | Count     |
+------------+------------+------+-----------+
| test_db    | test_table | log  | 1         |
+------------+------------+------+-----------+

The first argument of post() determines the database name and table name. If you specify td.test\_db.test\_table, the data is imported into the table *test_table* within the database *test_db*. They are automatically created at upload time.

Production Deployments

High-Availability Configurations of Fluentd

For high-traffic websites (more than 5 application nodes), use a high availability configuration of Fluentd to improve data transfer reliability and query performance.

Monitoring Fluentd

Monitoring Fluentd itself is also important. For general monitoring methods for Fluentd see the following:

Fluentd is fully open-sourced under the Fluentd project.

Next Steps

We offer a schema mechanism that is more flexible than that of traditional RDBMSs. For queries, we leverage the Hive and Trino Query Languages.

Previous page
Next page