Docker log files : verify size and optionally truncate to 0 bytes

[qwizzie]

**** Obsolete due to dashmate now having docker log rotation ****

Let Dashmate users verify the size of the Docker log files of the Platform and Core containers and optionally reset / truncate it to 0 bytes.
Only do this if these log files are getting very very big, as having log files in place to analyse during this beta phase of Platform activation is important.

Step 1 : nano logsize.sh
Step 2 : add following code

#!/bin/bash

# Function to truncate log file
truncate_log() {
    log_file=$1
    echo "Truncating log file: $log_file"
    sudo truncate -s0 "$log_file"
    echo "Log file truncated."
}

# Iterate over all container IDs
for container_id in $(docker ps -q); do
  # Get the full container ID
  full_container_id=$(docker inspect --format='{{.Id}}' "$container_id")

  # Log file path
  log_file="/var/lib/docker/containers/${full_container_id}/${full_container_id}-json.log"
 
  # Check if the log file exists and then get its size
  if [ -f "$log_file" ]; then
    size=$(sudo du -sh "$log_file" | awk '{print $1}')
    echo "Container ID: $full_container_id - Log Size: $size"

    # Ask user if they want to truncate the log file
    while true; do
      read -p "Do you want to truncate this log file to 0 bytes? (y/n): " yn
      case $yn in
          [Yy]* ) truncate_log "$log_file"; break;;
          [Nn]* ) echo "Skipping truncation for $log_file"; break;;
          * ) echo "Please answer yes (y) or no (n).";;
      esac
    done
  else
    echo "Container ID: $full_container_id - Log file not found"
  fi
done

Ctrl + X (Save? y enter)
Step 3 : chmod +x logsize.sh
Step 4 : sudo ./logsize.sh

 

[vampyren]

Awesome, thanks allot for the script. Cleaned some huge logs.