在GitLab CI管道中使用docker-compose

Question

我正在尝试使用以下.gitlab-ci.yml文件实现GitLab持续集成(CI)管道:

image: docker:latest

# When using dind, it's wise to use the overlayfs driver for
# improved performance.
variables:
  DOCKER_DRIVER: overlay

services:
  - docker:dind

before_script:
  - docker info
  - curl -L "https://github.com/docker/compose/releases/download/1.10.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
  - chmod +x /usr/local/bin/docker-compose
  - export PATH=/usr/local/bin:$PATH
  - echo $PATH

stages:
  - build
  - test

build:
  stage: build
  script:
    - docker-compose build
    - docker-compose up -d

test:
  stage: test
  script:
    - cd tests/tester
    - pytest test_run_tester.py
  except:
    - /^.*skip_tests$/

但是,在GitLab中我收到以下错误消息:

Running with gitlab-ci-multi-runner 1.10.4 (b32125f)
Using Docker executor with image docker:latest ...
Starting service docker:dind ...
Pulling docker image docker:dind ...
Waiting for services to be up and running...
Pulling docker image docker:latest ...
Running on runner-2e54fd37-project-13-concurrent-0 via scw-de9c9c...
Fetching changes...
HEAD is now at 2504a08 Update CI config
From https://lab.iperlane.com/gio/ipercron-compose
   2504a08..5c2f23f  CI         -> origin/CI
Checking out 5c2f23f1 as CI...
Skipping Git submodules setup
$ docker info
Containers: 0
 Running: 0
 Paused: 0
 Stopped: 0
Images: 0
Server Version: 1.13.1
Storage Driver: overlay
 Backing Filesystem: extfs
 Supports d_type: true
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins: 
 Volume: local
 Network: bridge host macvlan null overlay
Swarm: inactive
Runtimes: runc
Default Runtime: runc
Init Binary: docker-init
containerd version: aa8187dbd3b7ad67d8e5e3a15115d3eef43a7ed1
runc version: 9df8b306d01f59d3a8029be411de015b7304dd8f
init version: 949e6fa
Security Options:
 seccomp
  Profile: default
Kernel Version: 4.8.14-docker-2
Operating System: Alpine Linux v3.5 (containerized)
OSType: linux
Architecture: x86_64
CPUs: 4
Total Memory: 7.751 GiB
Name: 90395a030c02
ID: 7TKR:5PQN:XLFM:EJST:NF2V:NLQC:I2IZ:6OZG:TR4U:ZEAK:EVXE:HIF7
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
Experimental: false
Insecure Registries:
 127.0.0.0/8
Live Restore Enabled: false
WARNING: bridge-nf-call-iptables is disabled
WARNING: bridge-nf-call-ip6tables is disabled
$ curl -L "https://github.com/docker/compose/releases/download/1.10.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed

  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
  0     0    0     0    0     0      0      0 --:--:-- --:--:-- --:--:--     0
100   600    0   600    0     0   1175      0 --:--:-- --:--:-- --:--:--  1176

  0     0    0     0    0     0      0      0 --:--:--  0:00:01 --:--:--     0
  3 7929k    3  254k    0     0   116k      0  0:01:08  0:00:02  0:01:06  258k
 17 7929k   17 1358k    0     0   433k      0  0:00:18  0:00:03  0:00:15  704k
 61 7929k   61 4861k    0     0  1164k      0  0:00:06  0:00:04  0:00:02 1636k
100 7929k  100 7929k    0     0  1703k      0  0:00:04  0:00:04 --:--:-- 2300k
$ chmod +x /usr/local/bin/docker-compose
$ export PATH=/usr/local/bin:$PATH
$ docker-compose build
/bin/sh: eval: line 51: docker-compose: not found
ERROR: Build failed: exit code 127

docker-compose即使在安装并将其添加到路径之后,系统似乎也找不到.是否可能有其他图像docker-compose可以制作命令,或者以不同的方式将其安装在.gitlab-ci.yml？

Answer 1

问题

这是一个复杂的问题.

该docker:latest图像基于alpine(Alpine Linux),它是使用构建的musl-libc.这个系统是非常准确的,因此没有一个完整的桌面Linux可能拥有的一切.实际上,需要专门为此系统编译动态可执行文件.

docker-compose是一个Python应用程序,使用PyInstaller捆绑到Linux可执行文件中.这些可执行文件实际上只能在它们构建的系统上运行.如果您运行alpine容器,并且apk add file您可以看到您下载的(动态链接的)可执行文件需要特定的解释器.

# file /usr/local/bin/docker-compose
/usr/local/bin/docker-compose.pyinstaller: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 2.6.32, BuildID[sha1]=00747fe5bcde089bb4c2f1ba7ab5348bc02ac5bf, stripped

问题是/lib64/ld-linux-x86-64.so.2不存在的alpine.实际上,/lib64甚至都不存在.

解决方案

因为docker-compose是Python应用程序,所以也可以使用pip以下命令安装:

在alpine容器内测试:

$ docker run --rm -it alpine /bin/bash

以下是您可以手动运行的命令,或者添加到您的命令.gitlab-ci.yml before_script:

# apk add --no-cache python py2-pip
...
# pip install --no-cache-dir docker-compose
...
# docker-compose -v
docker-compose version 1.11.1, build 7c5d5e4

事实证明,实际上存在一个未解决的问题:

• https://github.com/docker/compose/issues/3465

Answer 2

Docker-compose 现在是官方镜像。你可以放

image: 
  name: docker/compose:1.23.2
  entrypoint: [""]

在您的.gitlab-ci.yml. 您需要删除撰写图像的默认入口点，这是由第二行完成的。之后，您可以同时使用docker和docker-compose。

这适用于 GitLab 9.4。您还可以构建自定义图像

FROM docker/compose:1.23.2
ENTRYPOINT []

并将其用作您的图像。