docker - 如何在 Docker 容器中增加 Corda 节点的内存限制

Question

部署 Corda 节点时，JVM XmX参数用于增加节点的内存限制，但当通过容器部署时，官方 Corda 镜像会抛出警告

WARNING: the use of the -Xmx flag is not recommended within docker containers. Use the --memory option passed to the container to limit heap size

https://github.com/corda/corda/blob/release/os/4.4/docker/src/bash/run-corda.sh#L4

为容器设置内存限制是不够的，因为节点本身因容器内的 OOM 异常而崩溃。

使用开源时，您可以绕过 XmX参数通过设置节点配置如下:

custom = {
   jvmArgs: [ "-Xmx1G", "-XX:+UseG1GC" ]
}

有没有办法通过 dockerfile 或 docker compose 而不是配置来设置 Corda 节点内存限制？

Answer 1

您可以使用 docker-compose 来传递 JVM_ARGS作为容器的环境变量。

 partya:
    image: corda/corda-zulu-java1.8-4.4
    container_name: partya
    ports:
      - "10006:10201"
    environment:   
      - JVM_ARGS=-Xmx6g -Xms2g -XX:+UseG1GC
    volumes:
      - ./Network/PartyA/node.conf:/etc/corda/node.conf
      - ./Network/PartyA/certificates:/opt/corda/certificates
      - ./Network/PartyA/persistence:/opt/corda/persistence
      - ./Network/PartyA/logs:/opt/corda/logs
      - ./Network/Shared/cordapps:/opt/corda/cordapps
      - ./Network/Shared/node-infos:/opt/corda/additional-node-infos
      - ./Network/Shared/network-parameters:/opt/corda/network-parameters

但这不会帮助您摆脱警告，因为脚本仍将用于运行节点。

如果你真的想摆脱警告，你可以使用 command覆盖默认运行脚本。

partya:
    image: corda/corda-zulu-java1.8-4.4
    container_name: partya
    ports:
      - "10006:10201"
    command: java -Dcapsule.jvm.args=-Xmx6g -Xms2g -XX:+UseG1GC -jar /opt/corda/bin/corda.jar --base-directory /opt/corda --config-file /etc/corda/node.conf
    volumes:
      - ./Network/PartyA/node.conf:/etc/corda/node.conf
      - ./Network/PartyA/certificates:/opt/corda/certificates
      - ./Network/PartyA/persistence:/opt/corda/persistence
      - ./Network/PartyA/logs:/opt/corda/logs
      - ./Network/Shared/cordapps:/opt/corda/cordapps
      - ./Network/Shared/node-infos:/opt/corda/additional-node-infos
      - ./Network/Shared/network-parameters:/opt/corda/network-parameters