Log Monitor

Reminder !!

Ensure the Pre-Requisites are in place before you proceed.

logMonitor.sh is a general purpose JSON log monitoring script for traces created by cardano-node. Currently, it looks for traces related to leader slots and block creation but other uses could be added in the future.

Block traces

For the core node (block producer) the logMonitor.sh script can be run to monitor the JSON log file created by cardano-node for traces related to leader slots and block creation.

For optimal coverage, it's best run together with CNCLI scripts as they provide different functionalities. Together, they create a complete picture of blocks assigned, created, validated or invalidated due to node issues.

Installation

The script is best run as a background process. This can be accomplished in many ways but the preferred method is to run it as a systemd service. A terminal multiplexer like tmux or screen could also be used but not covered here.

Use the deploy-as-systemd.sh script to create a systemd unit file (deployed together with CNCLI). Log output is handled by syslog and end up in the systems standard syslog file, normally /var/log/syslog. journalctl -f -u cnode-logmonitor.service can be used to check service output (follow mode). Other logging configurations are not covered here.

View Blocklog

Best viewed in CNTools or gLiveView. See CNCLI for example output.