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		    <h1>Docker</h1>
		    <h2>The Linux container engine</h2>
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		<p>
		Docker is an open-source engine which automates the deployment of applications as highly portable, self-sufficient containers.
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		<p>
		Docker containers are both <string>hardware-agnostic</strong> and <strong>platform-agnostic</strong>. This means that they can run anywhere, from your
		laptop to the largest EC2 compute instance and everything in between - and they don't require that you use a particular
		language, framework or packaging system. That makes them great building blocks for deploying and scaling web apps, databases
		and backend services without depending on a particular stack or provider.
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		Docker is an open-source implementation of the deployment engine which powers <a href="http://dotcloud.com">dotCloud</a>, a popular Platform-as-a-Service.
		It benefits directly from the experience accumulated over several years of large-scale operation and support of hundreds of thousands
		of applications and databases.
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                <h4>Heterogeneous payloads</h4>
                <p>Any combination of binaries, libraries, configuration files, scripts, virtualenvs, jars, gems, tarballs, you name it. No more juggling between domain-specific tools. Docker can deploy and run them all.</p>
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                <h4>Any server</h4>
                <p>Docker can run on any x64 machine with a modern linux kernel - whether it's a laptop, a bare metal server or a VM. This makes it perfect for multi-cloud deployments.</p>
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                <h4>Isolation</h4>
                <p>docker isolates processes from each other and from the underlying host, using lightweight containers.</p>
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                <h4>Repeatability</h4>
                <p>Because containers are isolated in their own filesystem, they behave the same regardless of where, when, and alongside what they run.</p>
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                <img src="https://twimg0-a.akamaihd.net/profile_images/2491994496/rbevyyq6ykp6bnoby2je_bigger.jpeg">
                <em>John Willis @botchagalupe:</em> IMHO docker is to paas what chef was to Iaas 4 years ago
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                <em>John Feminella ‏@superninjarobot:</em> So, @getdocker is pure excellence. If you've ever wished for arbitrary, PaaS-agnostic, lxc/aufs Linux containers, this is your jam!
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                <em>David Romulan ‏@destructuring:</em> I haven't had this much fun since AWS
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                <em>Ricardo Gladwell ‏@rgladwell:</em> wow @getdocker is either amazing or totally stupid
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                <h2>Notable features</h2>

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                    <li>Filesystem isolation: each process container runs in a completely separate root filesystem.</li>
                    <li>Resource isolation: system resources like cpu and memory can be allocated differently to each process container, using cgroups.</li>
                    <li>Network isolation: each process container runs in its own network namespace, with a virtual interface and IP address of its own.</li>
                    <li>Copy-on-write: root filesystems are created using copy-on-write, which makes deployment extremeley fast, memory-cheap and disk-cheap.</li>
                    <li>Logging: the standard streams (stdout/stderr/stdin) of each process container is collected and logged for real-time or batch retrieval.</li>
                    <li>Change management: changes to a container's filesystem can be committed into a new image and re-used to create more containers. No templating or manual configuration required.</li>
                    <li>Interactive shell: docker can allocate a pseudo-tty and attach to the standard input of any container, for example to run a throwaway interactive shell.</li>
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                <h2>Under the hood</h2>

                <p>Under the hood, Docker is built on the following components:</p>

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                    <li>The <a href="http://blog.dotcloud.com/kernel-secrets-from-the-paas-garage-part-24-c">cgroup</a> and <a href="http://blog.dotcloud.com/under-the-hood-linux-kernels-on-dotcloud-part">namespacing</a> capabilities of the Linux kernel;</li>
                    <li><a href="http://aufs.sourceforge.net/aufs.html">AUFS</a>, a powerful union filesystem with copy-on-write capabilities;</li>
                    <li>The <a href="http://golang.org">Go</a> programming language;</li>
                    <li><a href="http://lxc.sourceforge.net/">lxc</a>, a set of convenience scripts to simplify the creation of linux containers.</li>
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