docker - docker-compose up -d尝试在docker-compose.yml文件中设置mem_limit时给出 “OCI runtime create failed: wrong rlimit value”

Question

docker-compose版本1.18.0，在Ubuntu 16.04上构建8dd22a9
Docker版本17.12.0-CE，内部版本c97c6d6
docker-compose文件版本:“3”

docker-compose文件的相关部分

elasticsearch1:
    image: docker.elastic.co/elasticsearch/elasticsearch:5.6.0
    container_name: elasticsearch1
    restart: unless-stopped
    environment:
        - http.host=0.0.0.0
        - reindex.remote.whitelist=remote_es:*
        - xpack.security.enabled=false
        - cluster.name=docker-cluster
        - bootstrap.memory_lock=true
        - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
    ulimits:
        memlock:
            soft: -1
            hard: -1
        mem_limit: 1000000000
    volumes:
        - esdata1:/usr/share/elasticsearch/data
    ports:
        - 9200:9200 

当我执行docker-compose up -d时，出现以下错误:

ERROR: for elasticsearch1  Cannot start service elasticsearch1: OCI runtime create failed: wrong rlimit value: RLIMIT_MEM_LIMIT: unknown

有什么想法吗？

docker-compose reference document似乎暗示着，由于我未在群集模式下运行，因此即使我的docker-compose文件为版本3，我也应该对mem_limit使用版本2语法。

Answer 1

ERROR: for elasticsearch1  Cannot start service elasticsearch1: OCI runtime create failed: wrong rlimit value: RLIMIT_MEM_LIMIT: unknown

您遇到了以上错误，因为在mem_limit部分下设置了ulimits。它应该在与image，environment等相同级别的容器级别下:

elasticsearch1:
    image: docker.elastic.co/elasticsearch/elasticsearch:5.6.0
    container_name: elasticsearch1
    restart: unless-stopped
    environment:
        - http.host=0.0.0.0
        - reindex.remote.whitelist=remote_es:*
        - xpack.security.enabled=false
        - cluster.name=docker-cluster
        - bootstrap.memory_lock=true
        - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
    ulimits:
        memlock:
            soft: -1
            hard: -1
    mem_limit: 1000000000
    volumes:
        - esdata1:/usr/share/elasticsearch/data
    ports:
        - 9200:9200 

另一个问题在这里。根据issue:

The v3 format is specifically designed to run with Swarm mode and the docker stack features. It wouldn't make sense for us to re-add options to that format when they have been replaced and would be ignored in Swarm mode.

这意味着您只能在版本2中使用cpu_shares，cpu_quota，cpuset，mem_limit，memswap_limit和mem_swappiness，而只能在群体模式下在版本3中使用new resource options。

因此，如果您不想使用群体模式，则需要使用版本2。

最终的docker-compose.yml是:

version: '2'
services:
    elasticsearch1:
        image: docker.elastic.co/elasticsearch/elasticsearch:5.6.0
        container_name: elasticsearch1
        restart: unless-stopped
        environment:
            - http.host=0.0.0.0
            - reindex.remote.whitelist=remote_es:*
            - xpack.security.enabled=false
            - cluster.name=docker-cluster
            - bootstrap.memory_lock=true
            - "ES_JAVA_OPTS=-Xms512m -Xmx512m"
        ulimits:
            memlock:
                soft: -1
                hard: -1
        mem_limit: 1000000000
        volumes:
            - esdata1:/usr/share/elasticsearch/data
        ports:
            - 9200:9200