在GitLab配置项管道中使用docker-compose [英] Using docker-compose in a GitLab CI pipeline

问题描述

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

系统似乎无法找到docker-compose，即使在安装它并将其添加到路径之后也是如此。是否有其他映像可以执行docker-compose命令，或者是否有不同的方式将其安装在.gitlab-ci.yml中？

推荐答案

问题

这是一个复杂的问题。

docker:latest镜像基于alpine(Alpine Linux)，使用musl-libc构建。这个系统非常简单，因此不具备成熟的桌面Linux可能拥有的一切。事实上，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容器和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在alpine中不存在。事实上，/lib64根本不存在。

解决方案

因为docker-compose是Python应用程序，所以can also be installed using pip：

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，也可以添加到.gitlab-ci.ymlbefore_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，这实际上存在一个悬而未决的问题：

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

这篇关于在GitLab配置项管道中使用docker-compose的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！