docker - 为gitlab ci社区版启用docker

Question

我在启用docker进行构建工作时遇到困难。这是gitlab ci配置文件的样子:

image: docker:latest

services:
  - docker:dind

stages:
  - build

build:
  image: java:8
  stage: build
  script:
    - docker info
    - docker login -u gitlab-ci-token -p $CI_BUILD_TOKEN registry.gitlab.com/...
    - sbt server/docker:publish

这是作业的输出:

gitlab-ci-multi-runner 1.3.2 (0323456)
Using Docker executor with image java:8 ...
Pulling docker image docker:dind ...
Starting service docker:dind ...
Waiting for services to be up and running...
Pulling docker image java:8 ...
Running on runner-30dcea4b-project-1408237-concurrent-0 via runner-30dcea4b-machine-1470340415-c2bbfc45-digital-ocean-4gb...
Cloning repository...
Cloning into '/builds/.../...'...
Checking out 9ba87ff0 as master...
$ docker info
/bin/bash: line 42: docker: command not found

ERROR: Build failed: exit code 1    

为什么找不到docker的任何线索？

Answer 1

docker info命令正在基于java:8的容器中运行，该容器中未安装/可用docker。