Get absolute CPU usae of container

container-cpu-usae.sh

#!/usr/bin/env bash

if [ -z "$1" ]; then
  echo "Usage: $0 <container-id>"
  exit 1
fi

CONTAINER_ID=$1

CPU_PERCENT=$(docker stats $CONTAINER_ID --no-stream --format "{{.CPUPerc}}" | tr -d '%')

echo "CPU_PERCENT: $CPU_PERCENT"

if [ -z "$CPU_PERCENT" ]; then
  echo "Could not retrieve CPU usage for container $CONTAINER_ID"
  exit 1
fi

TOTAL_CORES=$(nproc)

echo "TOTAL_CORES: $TOTAL_CORES"

TOTAL_CAPACITY=$(echo "$TOTAL_CORES * 100" | bc)

echo "TOTAL_CAPACITY: $TOTAL_CAPACITY"

ABSOLUTE_CPU_USAGE=$(echo "scale=2; $CPU_PERCENT / 100 * $TOTAL_CAPACITY" | bc)

echo "Absolute CPU usage of container $CONTAINER_ID: $ABSOLUTE_CPU_USAGE CPU units"