Get Real Time CloudWatch Logs for EC2 Image Builder Pipeline Execution in Shell Script Using AWS CLI

There are a couple issues with the provided script that are likely causing the problem displaying the logs:

The aws logs tail command doesn't output the log content by default. You need to specify --output text to print the log events. The --follow parameter won't work within the loop, as it will just keep waiting for new log data. You need to tail without follow initially, then add follow after the loop.

exec_out=$(aws imagebuilder start-image-pipeline-execution --image-pipeline-arn $pipeline_arn)
imgBldr_arn=$(echo "${exec_out}" | jq -r '.imageBuildVersionArn')

log_group_name="/aws/imagebuilder/my-img-pipeline" 
log_stream_name_prefix="1.0.0/1"

while true; do

  echo "Checking status..."
  
  arn_out=$(aws imagebuilder get-image --image-build-version-arn "${imgBldr_arn}")
  status=$(echo "${arn_out}" | jq -r '.image.state.status')  

  echo "Current status: ${status}"

  # Print logs
  aws logs tail ${log_group_name} --log-stream-name-prefix ${log_stream_name_prefix} --output text

  if [ "${status}" == "AVAILABLE" ]; then
      echo "Build completed successfully!"  
      break
  fi

  sleep 30
done 

# Follow logs for any trailing output
aws logs tail ${log_group_name} --log-stream-name-prefix ${log_stream_name_prefix} --follow --output text