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Usage: pull [options] [SERVICE...]

Options:
    --ignore-pull-failures  Pull what it can and ignores images with pull failures.
    --parallel              Deprecated, pull multiple images in parallel (enabled by default).
    --no-parallel           Disable parallel pulling.
    -q, --quiet             Pull without printing progress information
    --include-deps          Also pull services declared as dependencies

拉与docker-compose.yml或docker-stack.yml文件中定义的服务关联的图像，但不基于这些图像启动容器。

例如，假设您具有docker-compose.yml“快速入门：撰写和Rails”样本中的此文件。

version: '2'
services:
  db:
    image: postgres
  web:
    build: .
    command: bundle exec rails s -p 3000 -b '0.0.0.0'
    volumes:
      - .:/myapp
    ports:
      - "3000:3000"
    depends_on:
      - db

如果您docker-compose pull ServiceName在与docker-compose.yml定义服务的文件相同的目录中运行，则Docker将提取关联的映像。例如，要调用在我们的示例中postgres配置为db服务的图像，您可以运行docker-compose pull db。

$ docker-compose pull db
Pulling db (postgres:latest)...
latest: Pulling from library/postgres
cd0a524342ef: Pull complete
9c784d04dcb0: Pull complete
d99dddf7e662: Pull complete
e5bff71e3ce6: Pull complete
cb3e0a865488: Pull complete
31295d654cd5: Pull complete
fc930a4e09f5: Pull complete
8650cce8ef01: Pull complete
61949acd8e52: Pull complete
527a203588c0: Pull complete
26dec14ac775: Pull complete
0efc0ed5a9e5: Pull complete
40cd26695b38: Pull complete
Digest: sha256:fd6c0e2a9d053bebb294bb13765b3e01be7817bf77b01d58c2377ff27a4a46dc
Status: Downloaded newer image for postgres:latest