Can not install docker-compose in docker container

[pgerhard]

Description of the issue

I am attempting to create a customized Jenkins container and in oder to have an easier time running builds I would like to install docker and docker-compose into this container. Installing docker works perfectly fine and I can use docker from within my build jobs.
However installing docker-compose based on the instructions found on the homepage does not.

Context information (for bug reports)

Output of "docker version": Docker version 18.03.1-ce, build 9ee9f40

Steps to reproduce the issue

1. Create a Dockerfile with the following content (the sections that are commented out are usually run, but are not necessary for reproducing this issue)

FROM jenkins/jenkins:lts-alpine

# Skip initial setup
# ENV JAVA_OPTS -Djenkins.install.runSetupWizard=false

# Default user and password
# ENV JENKINS_USER admin
# ENV JENKINS_PASS admin

# Create default user
# COPY default-user.groovy /usr/share/jenkins/ref/init.groovy.d/

# Install Docker CLI and additional APK packages
USER root

# Install gettext to have envsubst command
RUN apk update \
    && apk add gettext

RUN curl -fsSLO https://download.docker.com/linux/static/stable/x86_64/docker-18.03.1-ce.tgz \
  && tar xzvf docker-18.03.1-ce.tgz \
  && mv docker/docker /usr/local/bin \
  && rm -r docker docker-18.03.1-ce.tgz

RUN curl -L https://github.com/docker/compose/releases/download/1.21.2/docker-compose-Linux-x86_64 -o /usr/local/bin/docker-compose \ 
    && chmod +x /usr/local/bin/docker-compose

# Install default plugins
# Category: Organization and Administration
RUN /usr/local/bin/install-plugins.sh dashboard-view
RUN /usr/local/bin/install-plugins.sh cloudbees-folder
RUN /usr/local/bin/install-plugins.sh antisamy-markup-formatter

# Category: Build Features
RUN /usr/local/bin/install-plugins.sh build-timeout
RUN /usr/local/bin/install-plugins.sh credentials-binding
RUN /usr/local/bin/install-plugins.sh timestamper
RUN /usr/local/bin/install-plugins.sh ws-cleanup
RUN /usr/local/bin/install-plugins.sh command-launcher

# Category: Build Tools
RUN /usr/local/bin/install-plugins.sh ant
RUN /usr/local/bin/install-plugins.sh gradle

# Category: Build Analysis and Reporting
RUN /usr/local/bin/install-plugins.sh junit
RUN /usr/local/bin/install-plugins.sh checkstyle
RUN /usr/local/bin/install-plugins.sh findbugs

# Category: Pipelines and Continuous Delivery
RUN /usr/local/bin/install-plugins.sh workflow-aggregator
RUN /usr/local/bin/install-plugins.sh github-branch-source
RUN /usr/local/bin/install-plugins.sh pipeline-github-lib
RUN /usr/local/bin/install-plugins.sh pipeline-stage-view
RUN /usr/local/bin/install-plugins.sh pipeline-utility-steps

# Category: Source Code Management
RUN /usr/local/bin/install-plugins.sh git
RUN /usr/local/bin/install-plugins.sh gitlab-plugin
RUN /usr/local/bin/install-plugins.sh subversion

# Category: Distributed Builds
RUN /usr/local/bin/install-plugins.sh ssh-slaves

# Category: User Management and Security

# Category: Notifications and Publishing
RUN /usr/local/bin/install-plugins.sh email-ext
RUN /usr/local/bin/install-plugins.sh mailer
RUN /usr/local/bin/install-plugins.sh publish-over-ssh
RUN /usr/local/bin/install-plugins.sh ssh

2. Start this Dockerfile using docker-compose on the host machine using

version: '3'
services:
  jenkins:
    build:
      context: .
      dockerfile: Dockerfile      
    restart: always
    image: custom-jenkins:latest
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - /var/jenkins_home:/var/jenkins_home
    environment:
      - "JENKINS_OPTS=--prefix=/jenkins"
    ports:
      - 8080:8080

2. Attempt to run a pipeline which uses docker-compose

pipeline {
    agent any

    stages {
        stage('Restart docker-compose with new version'){
            steps{
                script {
                    sh 'docker-compose --version'
                }
            }
        }
    }
}

3. This build will fail with an output similar to

Started by user admin
Running in Durability level: MAX_SURVIVABILITY
[Pipeline] node
Running on Jenkins in /var/jenkins_home/workspace/Docker Compose test
[Pipeline] {
[Pipeline] stage
[Pipeline] { (Restart docker-compose with new version)
[Pipeline] script
[Pipeline] {
[Pipeline] sh
[Docker Compose test] Running shell script
+ docker-compose --version
/var/jenkins_home/workspace/Docker Compose test@tmp/durable-1cdcb1ed/script.sh: line 1: docker-compose: not found
[Pipeline] }
[Pipeline] // script
[Pipeline] }
[Pipeline] // stage
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline
ERROR: script returned exit code 127
Finished: FAILURE

4. Access the container directly using "docker exec -it <CONTAINER_ID> /bin/bash
5. Run "docker --version" this should produce the output

Docker version 18.03.1-ce, build 9ee9f40

6. Run "docker-compose --version" this should produce the output

bash: /usr/local/bin/docker-compose: No such file or directory

Observed result

docker-compose commands can not be executed within a build and are also not available in the CLI within the container

Expected result

docker-compose can be run normally within the container

Additional information

Output of 'uname -a' within in running docker container built by the above Dockerfile

Linux 6cf8608fcf05 3.10.0-693.21.1.el7.x86_64 #1 SMP Wed Mar 7 19:03:37 UTC 2018 x86_64 GNU/Linux

[shin-]

You need glibc for docker-compose to run on alpine. See e.g. https://github.com/docker/compose/blob/master/Dockerfile.run

[pgerhard]

Ah ok. Thanks a lot this does indeed some to fix my issue. Might it be an idea to document this on some official docker page?

[shin-]

Feel free to submit docs suggestions and PRs to the docs repo!