umbrel/scripts/memory-usage

#!/usr/bin/env bash
set -euo pipefail

UMBREL_ROOT="$(readlink -f $(dirname "${BASH_SOURCE[0]}")/..)"

get_container_memory_use () {
  local container="${1}"

  local container_memory=0

  local container_pids=$(docker top "${container}" | tail -n +2 | awk '{print $2}')
  for pid in $container_pids; do
    local pid_memory=$(ps u "${pid}" | awk '{print $4}' | grep -v 'MEM')
    if [[ ! -z "${pid_memory}" ]]; then
      container_memory=$(awk "BEGIN {print ${container_memory}+${pid_memory}}")
    fi
  done

  echo "${container_memory}"
}

get_app_memory_use () {
  local app="${1}"

  local app_memory=0

  local app_containers=$("${UMBREL_ROOT}/scripts/app" compose "${app}" ps | awk '{print $1}' | grep -v 'Name\|-----')
  for container in $app_containers; do
    local container_memory=$(get_container_memory_use "${container}")
    app_memory=$(awk "BEGIN {print ${app_memory}+${container_memory}}")
  done

  echo "${app_memory}"
}

main() {
  local total_system_memory_usage=$(free | awk 'NR==2{print sprintf("%.1f", $3*100/$2) }')
  echo "total: ${total_system_memory_usage}%"

  local total_container_memory=0

  # Core services memory use
  for service in bitcoin lnd electrs tor; do
    local service_memory=$(get_container_memory_use "${service}")
    total_container_memory=$(awk "BEGIN {print ${total_container_memory}+${service_memory}}")
    echo "${service}: ${service_memory}%"
  done

  # Installed app memory use
  for app in $("${UMBREL_ROOT}/scripts/app" ls-installed); do
    local app_memory=$(get_app_memory_use "${app}")
    total_container_memory=$(awk "BEGIN {print ${total_container_memory}+${app_memory}}")
    echo "${app}: ${app_memory}%"
  done

  # Misc system memory use
  local system_memory=$(awk "function pos(x){return(x<0?0:x)} BEGIN {print pos(${total_system_memory_usage}-${total_container_memory})}")
  echo "system: ${system_memory}%"
}

main 2> /dev/null | sort --key 2 --numeric-sort --reverse