tailnewfile

## This function monitors for a new log file to be created (as in after a pod is started) and does a tail -f on that log file.

tailnewfile () {
# Set default variables if they are not set in the shell's environment
: ${DIRECTORY:="/var/log/containers/"}
: ${PREFIX:="kube-apiserver"}
: ${OUTPUT_FILE:="/tmp/kube-api-troublshooting.out"}

# Track existing files
existing_files=$(ls "$DIRECTORY")

while true; do
  # Get the list of current files
  current_files=$(ls "$DIRECTORY")
  
  # Compare the current files with the existing files
  for file in $current_files; do
    if [[ ! "$existing_files" =~ "$file" ]] && [[ "$file" == $PREFIX* ]]; then
      echo "New file detected: $file"
      tail -f "$DIRECTORY/$file" | tee -a "$OUTPUT_FILE"
      # Update the list of existing files
      existing_files=$current_files
    fi
  done
  
  # Wait for a while before checking again
  sleep 2
done
}