Content Comparison

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• Set and Revert Log Levels: Temporarily change the log level and revert after a specified duration.

• Flexible JSON Parsing: Uses jq for JSON parsing if available; defaults to jq otherwise.

• Detachable Session Execution: Runs in a detachable session using screen or tmux, allowing the script to continue running independently of the terminal session. If both screen and tmux are installed, the script will prioritize screen first.

• Supports Cluster and Node Log Levels: Allows setting log level at both the cluster and individual node levels.

• Log File Auto-Detection: Automatically detects and adjust the castor.log file path for CSN and SCS environments.

• Log Size Monitoring: Reports the log size generated during the temporary log level change.

• Countdown Display: Shows a countdown for the specified duration.

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3. To verify scheduled job:

   Code Block
   atq 7 Sun Mar 02 03:00:00 2025 a root

4. To remove a scheduled job (replace JOB_ID with the actual job number from atq output):

   Code Block
   atrm 7

Behavior

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Log Level Change: Sets the log level to the specified value. If the current log level matches the requested level, the script skips the update.

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Countdown: During the specified duration, the script displays a countdown every second.

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Revert Log Level: After the countdown, the log level reverts to the initial value.

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Reattaching to a Detached Session

For more details on using screen and tmux, refer to their official documentation:

• screen: https://www.gnu.org/software/screen/

• tmux: https://github.com/tmux/tmux/wiki

If you accidentally close your terminal (e.g. putty, iterm2, etc) while the script is running in a detached session, you can reattach using the following commands:

For screen users:

1. List active screen session:

   Code Block
   screen -ls

2. Reattach to the session:

   Code Block
   screen -r <session_name>

For tmux users:

1. List active tmux sessions:

   Code Block
   tmux ls

2. Reattach to the session:

   Code Block
   tmux a -t <session_name>

If the session has ended or was not found, you may need to restart the script manually.

Behavior

1. Log Level Change: Sets the log level to the specified value. If the current log level matches the requested level, the script skips the update.

2. Countdown: During the specified duration, the script displays a countdown every second.

3. Revert Log Level: After the countdown, the log level reverts to the initial value.

4. Log Size Report: Provides approximately log size generated during the temporary log level change.

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• Missing Parameters: Missing parameters prompt a usage message.

• Invalid Log Levels: If an unsupported log level is specified, the script will prompt the user to enter a valid value.

• Invalid Duration: If a non-numeric duration is provided, you’re prompted to enter a valid duration in seconds.

• Connection Issues: If unable to connect to the Swarm API, check the IP, credentials, and network access.

Reattaching to a Detached Session

If you accidentally close your terminal (e.g. putty, iterm2, etc) while the script is running in a detached session, you can reattach using the following commands:

For screen users:

1. List active screen session:

   Code Block
   screen -ls

2. Reattach to the session:

   Code Block
   screen -r <session_name>

For tmux users:

1. List active tmux sessions:

   Code Block
   tmux ls

2. Reattach to the session:

   Code Block
   tmux a -t <session_name>

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• .

Notes

• Credentials are masked in the output for security.

• Log file sizes are shown in human-readable format (GB, MB, KB, B).

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