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Centralized Cluster System Logging

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Important Notes

  • rsyslog will be configured so that all cluster members will send system logs to a centralized cluster member.
  • The central logging server will be the 1st server defined in the inventory group k3s_control.
    • When Ansible detects it is being run on this host it will configure it to be the central logging host.
  • All other hosts will be configured as logging clients.

NOTE: Don't change which member is the centralized logging server name once deployed. It can create logging loops and other weird side effects.

Review defaults/main.yml for Centralized Logging Settings

The Containerd Settings are in variable namespace install.os.central_logging.

Define Centralized Logging Directory

The directory where all system logs will be stored on the centralized logging server:

install:
  os:
    central_logging:
      log_path: "/var/log/central"            # Directory on central server to hold logs

A utility called lnav can be used to watch centralized system logs in real-time:

$ lnav

# From an account without native access
sudo lnav /var/log/central

Screen shot of lnav:

lnav screen shot Back to README.md