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< title > Docker - the Linux container engine< / title >
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< li id = "nav-introduction" class = "active" > < a href = "/" > Introduction< / a > < / li >
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< h2 > The Linux container engine< / h2 >
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< h5 >
Docker is an open-source engine which automates the deployment of applications as highly portable, self-sufficient containers which are independent of hardware, language, framework, packaging system and hosting provider.
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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 >
< 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 >
< h4 > Repeatability< / h4 >
< p > Because each container is isolated in its own filesystem, they behave the same regardless of where, when, and alongside what they run.< / p >
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< a href = "http://dotcloud.theresumator.com/apply/mWjkD4/Software-Engineer.html" title = "Job description" > < img src = "static/img/hiring_graphic.png" alt = "we're hiring" width = "140" style = "margin-top: 25px" > < / a >
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< h4 > Do you think it is cool to hack on docker? Join us!< / h4 >
< ul >
< li > Work on open source< / li >
< li > Program in Go< / li >
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< a href = "http://dotcloud.theresumator.com/apply/mWjkD4/Software-Engineer.html" title = "Job description" > read more< / a >
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< h1 > New! Docker Index< / h1 >
On the Docker Index you can find and explore pre-made container images. It allows you to share your images and download them.
< br > < br >
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DOCKER index
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< em > Mitchell Hashimoto < / em > Docker launched today. It is incredible. They’
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< em > Adam Jacob < / em > Docker is clearly the right idea. @solomonstre absolutely killed it. Containerized app deployment is the future, I think.
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< em > Matt Townsend < / em > I have a serious code crush on docker.io - it's Lego for PaaS. Motherfucking awesome Lego.
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< em > Rob Harrop < / em > Impressed by @getdocker - it's all kinds of magic. Serious rethink of AWS architecture happening @skillsmatter.
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< 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 < / 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 < / em > I haven't had this much fun since AWS
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< em > Ricardo Gladwell < / em > wow @getdocker is either amazing or totally stupid
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< h2 > Notable features< / h2 >
< ul >
< 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 >
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< li > Copy-on-write: root filesystems are created using copy-on-write, which makes deployment extremely fast, memory-cheap and disk-cheap.< / li >
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< 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 >
< / ul >
< h2 > Under the hood< / h2 >
< p > Under the hood, Docker is built on the following components:< / p >
< ul >
< 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 >
< / ul >
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< h2 > Who started it< / h2 >
< p >
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.< / p >
< p > It benefits directly from the experience accumulated over several years of large-scale operation and support of hundreds of thousands
of applications and databases.
< / p >
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< h3 id = "twitter" > Twitter< / h3 >
< a class = "twitter-timeline" href = "https://twitter.com/getdocker" data-widget-id = "312730839718957056" > Tweets by @getdocker< / a >
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