如何使用卷将数据持久化在dockerized DynamoDB中 [英] How to persist data in a dockerized DynamoDB using volumes

问题描述

我的docker compose文件有两个容器，看起来像这样

My docker compose file has two containers and looks like this

  version: '3'

  services:
     dynamodb:
       image: amazon/dynamodb-local
       ports: 
         - '8000:8000'
       networks:
         - testnetwork

     audit-server:
         image: audit-dynamo
         environment:
         DYNAMO_URL: 'http://0.0.0.0:8000'
         command: node app.js
         ports: 
           - '3000:3000'
         depends_on: 
           - dynamodb
         # restart: always

         networks:
           - testnetwork

  networks:
    testnetwork:

我的目标是将本地数据装载到一定数量。当前在 docker-compose down

My goal is to mount local data to some volume. currently losing data on docker-compose down

推荐答案

上丢失数据，以便图像使用默认情况下是内存中的dynamodb（通过在该映像上运行docker inspect可以找到的内容）

So that image use by default in-memory dynamodb (what you can find by running docker inspect on that image)

"CMD [\"-jar\" \"DynamoDBLocal.jar\" \"-inMemory\"]"

因此，如果您想保留数据，则需要在docker-compose中执行以下操作：

So if you want to keep your data you need to do something like this in you docker-compose:

version: '3'

volumes: 
  dynamodb_data:

services:
  dynamodb:
    image: amazon/dynamodb-local
    command: -jar DynamoDBLocal.jar -sharedDb -dbPath /home/dynamodblocal/data/
    volumes:
     - dynamodb_data:/home/dynamodblocal/data

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