====== 07 Docker Memory Limit ======

===== docker-compose ver 2 =====

<code>
version: '2'
  node-exporter:
    image: prom/node-exporter
    container_name: node-exporter
    ports:
      - 9100:9100
    restart: always
    mem_limit: 100m
</code>

===== docker-compose ver 3 =====

<code>
version: '3'
  node-exporter:
    image: prom/node-exporter
    container_name: node-exporter
    ports:
      - 9100:9100
    restart: always
    deploy:
      resources:
        limits:
          memory: 100m
</code>


==== Error ====

普通にup -d 行うとサポートしてないというWERNINGが出てメモリの制限できない

<code>
$ docker-compose up -d
WARNING: Some services (nginx) use the 'deploy' key, which will be ignored. Compose does not support 'deploy' configuration - use `docker stack deploy` to deploy to a swarm.
</code>

=== 対応 ===
「--compatibility」を付けるとversion 3でもメモリ制限可能
ただ本番利用では、compatibilityは非推奨になっているようです。
<code>
$ docker-compose --compatibility up -d
</code>


===== 確認 =====

<code>
CONTAINER           CPU %               MEM USAGE / LIMIT       MEM %               NET I/O             BLOCK I/O           PIDS
100f6005096c        0.00%               43.76 MiB / 100 MiB     43.76%              3.33 MB / 93.5 MB   0 B / 0 B           67
</code>

{{tag>Docker}}