docker - 将Docker容器中创建的目录共享到另一个Docker容器？

Question

这里急需大量帮助的Docker noob。有两个docker容器:simple-jar和elk。 simple-jar在其容器内的/logs目录中生成日志文件，另一个应用程序elk需要访问这些日志文件以对其进行一些处理。

如何共享/logs目录，以便elk Docker容器可以访问它？

这是 simple-jar的Dockerfile:

FROM openjdk:latest
COPY target/pulsar_logging_consumer-1.0-SNAPSHOT-jar-with-dependencies.jar /usr/src/pulsar_logging_consumer-1.0-SNAPSHOT-jar-with-dependencies.jar
EXPOSE 6650
CMD java -jar /usr/src/pulsar_logging_consumer-1.0-SNAPSHOT-jar-with-dependencies.jar 

docker-compose.yml:

version: '3.2'

services:
  elk:
    build:
      context: elasticsearch/
      args:
        ELK_VERSION: $ELK_VERSION
    volumes:
      - type: bind
        source: ./elasticsearch/config/elasticsearch.yml
        target: /usr/share/elasticsearch/config/elasticsearch.yml
        read_only: true
      - type: volume
        source: elasticsearch
        target: /usr/share/elasticsearch/data
    ports:
      - "9200:9200"
      - "9300:9300"

  simple-jar:
    build:
      context: pulsar_logging_consumer/
    volumes:
      - type: bind
        source: ./pulsar_logging_consumer/logs
        target: /usr/share/logs
        read_only: true
    ports:
      - "6500:6500"
    networks:
      - elk
    depends_on:
      - elasticsearch

networks:
  elk:
    driver: bridge

volumes:
  elasticsearch:

Answer 1

您有两种选择，
1. 创建一个外部命名卷，该卷需要由您(用户)创建，否则将失败，请使用以下命令

docker volume create --driver local \
--opt type=none \
--opt device=/var/opt/my_data_logs \
--opt o=bind logs_data

Select the volume type that fits, there are different types like nfs, ext3 and 3rd party plugins.

在您的docker-compose.yml文件中
版本“3”

volumes:
  logs_data:
    external: true

services:
  app:
    image: yourimage:latest
    ports:
      - 80:80
    volumes:
      - logs_data:/your/path

共享卷:使用另一个(顶级卷)定义的卷启动容器
版本“3”

 volumes:
   logs_data:
     external: true

 services:
   app1:
     image: appimage:latest
     ports:
       - 80:80
     volumes:
       - logs_data:/your/path:ro
   app2:
     image: yourimage:latest
     ports:
       - 8080:80
     volumes:
       - logs_data:/your/path:ro