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In Chronosphere Telemetry Pipeline, you can use fleets to manage instances of Core Agent. Use this guide to install Core Agent on Debian-based Linux distributions.

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Supported environments

Core Agent supports the following Debian-based distributions and architectures:
DistributionArchitectures
Debian 11 (Bullseye)x86-64, arm64v8
Debian 10 (Buster)x86-64, arm64v8
Ubuntu 22.04 (Jammy Jellyfish)x86-64, arm64v8
Ubuntu 20.04 (Focal Fossa)x86-64, arm64v8
Ubuntu 18.04 (Bionic Beaver)x86-64, arm64v8
Ubuntu 16.04 (Xenial Xerus)x86-64

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Dependencies

For Debian-based installations, Core Agent has the following general dependencies:
  • libc
  • libsasl
  • libsystemd
  • libyaml
  • OpenSSL
  • zlib
To retrieve a list of specific dependencies for your environment, run the following command: 
dpkg -I PACKAGE
Replace PACKAGE with the name of the Core Agent package.

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Validate packages

When retrieving packages from the Core Agent repository, Chronosphere uses dual validation (SHA256) and a GPG key.

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SHA256 check

The SHA256 file is distributed as the files.sha256 file in the Core Agent repository. This file contains a list of all included packages. 
shasum -a 256 calyptia-fluent-bit-X.<extension>

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Verify signatures

Core Agent packages are signed with calyptia.key. You can use dpkg and apt-key to verify these signatures. 
apt-key add calyptia.key && \
dpkg-sig --list PACKAGE
Replace PACKAGE with the name of the Core Agent package.

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Install

Use these steps to install and enable Core Agent:
  1. Run the following command to update your APT package list: 
    sudo apt-get update
  2. Run the following command to upgrade your APT packages: 
    sudo apt-get upgrade
  3. Run the following command to install Core Agent: 
    sudo apt-get install calyptia-fluent-bit
  4. Run the following command to instruct systemd to enable the Core Agent service: 
    sudo systemctl calyptia-fluent-bit start
  5. Perform a status check to confirm Core Agent is active. The status check should return output similar to the following: 
    sudo service calyptia-fluent-bit status
● calyptia-fluent-bit.service - Calyptia Fluent Bit
   Loaded: loaded (/lib/systemd/system/calyptia-fluent-bit.service; disabled; vendor preset: enabled)
   Active: active (running) since mié 2016-07-06 16:58:25 CST; 2h 45min ago
 Main PID: 6739 (calyptia-fluent-bit)
    Tasks: 1
   Memory: 656.0K
      CPU: 1.393s
   CGroup: /system.slice/calyptia-fluent-bit.service
           └─6739 /opt/calyptia-fluent-bit/bin/calyptia-fluent-bit -c /etc/calyptia-fluent-bit/calyptia-fluent-bit.conf
    The default configuration of Core Agent is to collect metrics of CPU usage and send those metrics to stdout. You can see this outgoing data in your /var/log/messages file.