Backup images, volumes in Win11

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docker save -o all_images.tar (docker images --format "{{.Repository}}")
 
docker volume ls -q | ForEach-Object {  docker run --rm -v "${_}:/volume" -v "${PWD}:/backup" alpine tar -czf "/backup/${_}.tar.gz" -C /volume .}

docker ps -a --format "{{.Names}}" | ForEach-Object {  docker inspect $_ | Out-File -Encoding utf8 "$_.json"}

Restore on Debian11

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# load images
docker load -i all_images.tar

# create volumes and restore data
for f in *.tar.gz; do
  vol="${f%.tar.gz}"
  echo "Restoring $vol ..."
  docker volume create "$vol" >/dev/null 2>&1
  docker run --rm \
    -v "$vol:/volume" \
    -v "$(pwd):/backup" \
    ubuntu sh -c "cd /volume && tar -xzf /backup/$f"
done

Issues

  1. volume already exists but was not created by Docker Compose. Use external: true to use an existing volume

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    volumes:
  taiga-static-data:
    external: true

  2. volume doesn’t exist

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    volumes:
  taiga-static-data:
    external: true
    name: taiga-docker_taiga-static-data

吐槽

docker compose创建volume时，会在compose.yml文件里定义的volume名称前面加上当前项目名（文件夹名）。比如说，你在目录~/project/compose.yml里定义如下的volume:

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volumes:
      taiga-static-data:

当你运行docker compose up 创建容器时，新建的volume名称实际上是project_taiga-static-data。

在新机器上恢复volume数据之后，再次回到之前的项目~/project/ 运行docker compose up时，提示

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...volume already exists but was not created by Docker Compose. Use `external: true` to use an existing volume

加上external:true之后，又提示volume doesn’t exist。感觉有点死循环了。无奈，再加一个name，暂时解决这个问题。

Reference