77 lines
4.7 KiB
Markdown
77 lines
4.7 KiB
Markdown
<!--[metadata]>
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+++
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title = "Docker images test"
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description = "How to work with Docker images."
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keywords = ["documentation, docs, the docker guide, docker guide, docker, docker platform, virtualization framework, docker.io, Docker images, Docker image, image management, Docker repos, Docker repositories, docker, docker tag, docker tags, Docker Hub, collaboration"]
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<![end-metadata]-->
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<a title="back" class="dockerfile back" href="/userguide/dockerimages/#creating-our-own-images">Back</a>
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# Dockerfile tutorial
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## Test your Dockerfile knowledge - Level 1
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### Questions
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<div name="level1_questions">
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What is the Dockerfile instruction to specify the base image ?<br />
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<input type="text" class="level" id="level1_q0"/>
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<div class="alert alert-error level_error" id="level1_error0" style="display:none;">The right answer was <code>FROM</code></div>
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<br>
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What is the Dockerfile instruction to execute any commands on the current image and commit the results?<br />
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<input type="text" class="level" id="level1_q1"/>
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<div class="alert alert-error level_error" id="level1_error1" style="display:none;">The right answer was <code>RUN</code></div>
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<br>
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What is the Dockerfile instruction to specify the maintainer of the Dockerfile?<br />
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<input type="text" class="level" id="level1_q2"/>
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<div class="alert alert-error level_error" id="level1_error2" style="display:none;">The right answer was <code>MAINTAINER</code></div>
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<br>
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What is the character used to add comment in Dockerfiles?<br />
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<input type="text" class="level" id="level1_q3"/>
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<div class="alert alert-error level_error" id="level1_error3" style="display:none;">The right answer was <code>#</code></div>
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<p>
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<div class="alert alert-success" id="all_good" style="display:none;">Congratulations, you made no mistake!<br />
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Tell the world <a href="https://twitter.com/share" class="twitter-share-button" data-url="http://www.docker.io/learn/dockerfile/level1/" data-text="I just successfully answered questions of the #Dockerfile tutorial Level 1. What's your score?" data-via="docker" >Tweet</a><br />
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And try the next challenge: <a href="#fill-the-dockerfile">Fill the Dockerfile</a>
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</div>
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<div class="alert alert-error" id="no_good" style="display:none;">Your Dockerfile skills are not yet perfect, try to take the time to read this tutorial again.</div>
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<div class="alert alert-block" id="some_good" style="display:none;">You're almost there! Read carefully the sections corresponding to your errors, and take the test again!</div>
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</p>
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<button class="btn btn-primary" id="check_level1_questions">Check your answers</button>
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</div>
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### Fill the Dockerfile
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Your best friend Eric Bardin sent you a Dockerfile, but some parts were lost in the ocean. Can you find the missing parts?
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<div class="form-inline">
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<pre>
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# This is a Dockerfile to create an image with Memcached and Emacs installed. <br>
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# VERSION 1.0<br>
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# use the ubuntu base image provided by dotCloud
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<input type="text" class="l_fill" id="from" /> ub<input type="text" class="l_fill" id="ubuntu" /><br>
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<input type="text" class="l_fill" id="maintainer" /> E<input type="text" class="l_fill" id="eric" /> B<input type="text" class="l_fill" id="bardin" />, eric.bardin@dotcloud.com<br>
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# make sure the package repository is up to date
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<input type="text" class="l_fill" id="run0"/> echo "deb http://archive.ubuntu.com/ubuntu precise main universe" > /etc/apt/sources.list
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<input type="text" class="l_fill" id="run1" /> apt-get update<br>
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# install memcached
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RUN apt-get install -y <input type="text" class="l_fill" id="memcached" /><br>
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# install emacs
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<input type="text" class="l_fill" id="run2"/> apt-get install -y emacs23
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</pre>
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</div>
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<div class="alert alert-success" id="dockerfile_ok" style="display:none;">Congratulations, you successfully restored Eric's Dockerfile! You are ready to containerize the world!.<br />
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Tell the world! <a href="https://twitter.com/share" class="twitter-share-button" data-url="https://www.docker.io/learn/dockerfile/level1/" data-text="I just successfully completed the 'Fill the Dockerfile' challenge of the #Dockerfile tutorial Level 1" data-via="docker" >Tweet</a>
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</div>
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<div class="alert alert-error" id="dockerfile_ko" style="display:none;">Wooops, there are one or more errors in the Dockerfile. Try again.</div>
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<br>
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<button class="btn btn-primary" id="check_level1_fill">Check the Dockerfile</button></p>
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## What's next?
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<p>In the next level, we will go into more detail about how to specify which command should be executed when the container starts,
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which user to use, and how expose a particular port.</p>
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<a title="back" class="btn btn-primary back" href="/userguide/dockerimages/#creating-our-own-images">Back</a>
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<a title="next level" class="btn btn-primary" href="/userguide/level2">Go to the next level</a>
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