Docker 仅在第一次 vagrant up 时构建和运行

Question

问题:有没有一种方法可以仅在首次创建 vagrant 机器时构建和运行 docker 镜像？

问题:运行时vagrant provision我收到一条错误消息 docker: Error response from daemon: Conflict. The container name "/jenkins" is already in use by container <snip> .

附加信息:我跑了vagrant provision因为我在 plugins.txt 文件中添加了另一个插件，以便在设置 jenkins 机器时自动安装。

我以这种方式创建了构建脚本，以使 vagrant 机器构建尽可能快，并且 docker 镜像尽可能小(这里仍然需要工作)。还因为我想删除 Jenkins 设置 GUI，并创建了一个默认管理员帐户。

Vagrant 文件:

Vagrant.require_version ">= 1.5"

Vagrant.configure("2") do |config|

    config.vbguest.auto_update = false

    config.vm.provider :virtualbox do |v|
        v.customize [
            "modifyvm", :id,
            "--memory", 1024,
            "--natdnshostresolver1", "on",
            "--cpus", 2,
        ]
    end

    config.vm.box = "ubuntu/trusty64"
    config.vm.hostname = "dev-jenkins-site"

    # Forward jenkins port.
    config.vm.network "forwarded_port", guest: 8080, host: 8080

    config.vm.network :private_network, ip: "192.168.34.56"

    jenkins_dir = "/var/jenkins_home"

    # Run Dockerfile.
    config.vm.provision "docker"

    # Restart jenkins container, in case it was stopped (which is possible from a 'vagrant halt').
    #   This won't run if this after the docker build & run provision (below) when using 'vagrant provision' because it
    #   returns an error and exits before this can run.
    config.vm.provision "shell",
      inline: "docker restart jenkins",
      run: "always"

    # Only need to build the image and container one time.
    #   Using '--restart always' doesn't work when the container is stopped from 'vagrant halt'.
    config.vm.provision "shell",
      inline: "cd /vagrant && make jenkins && docker run -d --name jenkins -p 80:8080 -p 50000:50000 -v #{jenkins_dir}:#{jenkins_dir} draven/jenkins",
      run: "once"

    # Files on your local machine
    config.vm.synced_folder "./jenkins_home", jenkins_dir
    config.vm.synced_folder ".", "/vagrant"
end

Dockerfile:

FROM jenkins/jenkins:latest

COPY plugins.txt /usr/share/jenkins/ref/plugins.txt
RUN /usr/local/bin/install-plugins.sh < /usr/share/jenkins/ref/plugins.txt

ENV JENKINS_USER admin
ENV JENKINS_PASS admin

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

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

VOLUME /var/jenkins_home

生成文件:

SHELL:=/bin/bash

jenkins:
    cd docker-image && docker build -t draven/jenkins .

Answer 1

如果没有另外说明，Vag​​rant Provision 总是运行所有的 Provisioner。

一个解决方案是通过首先删除同名容器(如果存在)来使您的 docker 配置程序具有幂等性:

config.vm.provision "shell",
  run: "once",
  inline: <<-SHELL
    cd /vagrant \
    && docker ps -a -f "name=jenkins" \
    && docker rm jenkins;
    make jenkins \
    && docker run -d \
        --name jenkins \
        -p 80:8080 -p 50000:50000 \
        -v #{jenkins_dir}:#{jenkins_dir} \                   
        draven/jenkins
  SHELL