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aria-label="breadcrumbs"><ul class="breadcrumbs" itemscope="" itemtype="https://schema.org/BreadcrumbList"><li class="breadcrumbs__item"><a class="breadcrumbs__link" href="/zh-cn/">🏠</a></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item"><span class="breadcrumbs__link" itemprop="item name">Design Docs</span><meta itemprop="position" content="1"></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="item name">Environments Implementation</span><meta itemprop="position" content="2"></li></ul></nav><span class="theme-doc-version-badge badge badge--secondary">Version: master 🏃</span><div class="tocCollapsible_jdIR theme-doc-toc-mobile tocMobile_TmEX"><button type="button" class="clean-btn tocCollapsibleButton_Fzxq">On this page</button></div><div class="theme-doc-markdown markdown"><header><h1>Environments Implementation</h1></header><h2 class="anchor anchorWithStickyNavbar_mojV" id="overview">Overview<a class="hash-link" href="#overview" title="Direct link to heading">​</a></h2><p>Environment profiles (or environment for short) defines a set of libraries and when Docker is being used, a Docker image in order to run an experiment or a notebook. </p><p>Docker and/or VM-image (such as, VirtualBox/VMWare images, Amazon Machine Images - AMI, Or custom image of Azure VM) defines the base layer of the environment. Please note that VM-image is different from VM instance type,</p><p>On top of that, users can define a set of libraries (such as Python/R) to install, we call it kernel.</p><p><strong>Example of Environment</strong></p><div class="codeBlockContainer_I0IT theme-code-block"><div class="codeBlockContent_wNvx" style="color:#bfc7d5;background-color:#292d3e"><pre tabindex="0" class="prism-code language-text codeBlock_jd64 thin-scrollbar"><code class="codeBlockLines_mRuA"><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">     +-------------------+</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">     |+-----------------+|</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">     || Python=3.7      ||</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">     || Tensorflow=2.0  ||</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">     |+---Exp Dependency+|</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">     |+-----------------+|</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">     ||OS=Ubuntu16.04   ||</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">     ||CUDA=10.2        ||</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">     ||GPU_Driver=375.. ||</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">     |+---Base Library--+|</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">     +-------------------+</span><br></span></code></pre><button type="button" aria-label="Copy code to clipboard" title="Copy" class="copyButton_eDfN clean-btn"><span class="copyButtonIcons_W9eQ" aria-hidden="true"><svg class="copyButtonIcon_XEyF" viewBox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg class="copyButtonSuccessIcon_i9w9" viewBox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div><p>As you can see, There&#x27;re base libraries, such as what OS, CUDA version, GPU driver, etc. They can be achieved by specifying a VM-image / Docker image.</p><p>On top of that, user can bring their dependencies, such as different version of Python, Tensorflow, Pandas, etc.</p><p><strong>How users use environment?</strong></p><p>Users can save different environment configs which can be also shared across the platform. Environment profiles can be used to run a notebook (e.g. by choosing different kernel from Jupyter), or an experiment. Predefined experiment library includes what environment to use so users don&#x27;t have to choose which environment to use.</p><div class="codeBlockContainer_I0IT theme-code-block"><div class="codeBlockContent_wNvx" style="color:#bfc7d5;background-color:#292d3e"><pre tabindex="0" class="prism-code language-text codeBlock_jd64 thin-scrollbar"><code class="codeBlockLines_mRuA"><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        +-------------------+</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        |+-----------------+|       +------------+</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        || Python=3.7      ||       |User1       |</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        || Tensorflow=2.0  ||       +------------+</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        |+---Kernel -------+|       +------------+</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        |+-----------------+|&lt;----+ |User2       |</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        ||OS=Ubuntu16.04   ||     + +------------+</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        ||CUDA=10.2        ||     | +------------+</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        ||GPU_Driver=375.. ||     | |User3       |</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        |+---Base Library--+|     | +------------+</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        +-----Default-Env---+     |</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">                                  |</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">                                  |</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        +-------------------+     |</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        |+-----------------+|     |</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        || Python=3.3      ||     |</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        || Tensorflow=2.0  ||     |</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        |+---kernel--------+|     |</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        |+-----------------+|     |</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        ||OS=Ubuntu16.04   ||     |</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        ||CUDA=10.3        ||&lt;----+</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        ||GPU_Driver=375.. ||</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        |+---Base Library--+|</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        +-----My-Customized-+</span><br></span></code></pre><button type="button" aria-label="Copy code to clipboard" title="Copy" class="copyButton_eDfN clean-btn"><span class="copyButtonIcons_W9eQ" aria-hidden="true"><svg class="copyButtonIcon_XEyF" viewBox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg class="copyButtonSuccessIcon_i9w9" viewBox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div><p>There&#x27;re two environments in the above graph, &quot;Default-Env&quot; and &quot;My-Customized&quot;, which can have different combinations of libraries for different experiments/notebooks. Users can choose different environments for different experiments as they want.</p><p>Environments can be added/listed/deleted/selected through CLI/SDK/UI.</p><h1>Implementation</h1><h2 class="anchor anchorWithStickyNavbar_mojV" id="environment-api-definition">Environment API definition<a class="hash-link" href="#environment-api-definition" title="Direct link to heading">​</a></h2><p>Let look at what object definition looks like to define an environment, API of environment looks like:</p><div class="codeBlockContainer_I0IT theme-code-block"><div class="codeBlockContent_wNvx" style="color:#bfc7d5;background-color:#292d3e"><pre tabindex="0" class="prism-code language-text codeBlock_jd64 thin-scrollbar"><code class="codeBlockLines_mRuA"><span class="token-line" style="color:#bfc7d5"><span class="token plain">    name: &quot;my_submarine_env&quot;,</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">    vm-image: &quot;...&quot;,</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">    docker-image: &quot;...&quot;, </span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">    kernel: </span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">       &lt;object of kernel&gt;</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">    description: &quot;this is the most common env used by team ABC&quot;</span><br></span></code></pre><button type="button" aria-label="Copy code to clipboard" title="Copy" class="copyButton_eDfN clean-btn"><span class="copyButtonIcons_W9eQ" aria-hidden="true"><svg class="copyButtonIcon_XEyF" viewBox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg class="copyButtonSuccessIcon_i9w9" viewBox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div><ul><li><code>vm-image</code> is optional if we don&#x27;t need to launch new VM (like running a training job in a cloud-remote machine). </li><li><code>docker-image</code> is required</li><li><code>kernel</code> could be optional if kernel is already included by vm-image or docker-image.</li><li><code>name</code> of the environment should be unique in the system, so user can reference it when create a new experiment/notebook.</li></ul><h2 class="anchor anchorWithStickyNavbar_mojV" id="vm-image-and-docker-image">VM-image and Docker-image<a class="hash-link" href="#vm-image-and-docker-image" title="Direct link to heading">​</a></h2><p>Docker-image and VM image should be prepared by system admin / SREs, it is hard for Data-Scientists to write an error-proof Dockerfile, and push/manage Docker images. This is one of the reason we hide Docker-image inside &quot;environment&quot;, we will encourage users to customize their kernels if needed, but don&#x27;t have to touch Dockerfile and build/push/manage new Docker images.</p><p>As a project, we will document what&#x27;s the best practice and example of Dockerfiles. </p><p>Dockerfile should include proper <code>ENTRYPOINT</code> definition which pointed to our default script, so no matter it is notebook, or an experiment, we will setup kernel (see below) and other environment variables properly.</p><h2 class="anchor anchorWithStickyNavbar_mojV" id="kernel-implementation">Kernel Implementation<a class="hash-link" href="#kernel-implementation" title="Direct link to heading">​</a></h2><p>After investigating different alternatives (such as pipenv, venv, etc.), we decided to use Conda environment which nicely replaces Python virtual env, pip, and can also support other languages. More details can be found at: <a href="https://medium.com/@krishnaregmi/pipenv-vs-virtualenv-vs-conda-environment-3dde3f6869ed" target="_blank" rel="noopener noreferrer">https://medium.com/@krishnaregmi/pipenv-vs-virtualenv-vs-conda-environment-3dde3f6869ed</a></p><p>When once Conda, users can easily add, remove dependency of a Conda environment. User can also easily export environment to yaml file.</p><p>The yaml file of Conda environment by using <code>conda env export</code> looks like: </p><div class="codeBlockContainer_I0IT theme-code-block"><div class="codeBlockContent_wNvx" style="color:#bfc7d5;background-color:#292d3e"><pre tabindex="0" class="prism-code language-text codeBlock_jd64 thin-scrollbar"><code class="codeBlockLines_mRuA"><span class="token-line" style="color:#bfc7d5"><span class="token plain">name: base</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">channels:</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">  - defaults</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">dependencies:</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">  - _ipyw_jlab_nb_ext_conf=0.1.0=py37_0</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">  - alabaster=0.7.12=py37_0</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">  - anaconda=2020.02=py37_0</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">  - anaconda-client=1.7.2=py37_0</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">  - anaconda-navigator=1.9.12=py37_0</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">  - anaconda-project=0.8.4=py_0</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">  - applaunchservices=0.2.1=py_0</span><br></span></code></pre><button type="button" aria-label="Copy code to clipboard" title="Copy" class="copyButton_eDfN clean-btn"><span class="copyButtonIcons_W9eQ" aria-hidden="true"><svg class="copyButtonIcon_XEyF" viewBox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg class="copyButtonSuccessIcon_i9w9" viewBox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div><p>Including Conda kernel, the environment object may look like: </p><div class="codeBlockContainer_I0IT theme-code-block"><div class="codeBlockContent_wNvx" style="color:#bfc7d5;background-color:#292d3e"><pre tabindex="0" class="prism-code language-text codeBlock_jd64 thin-scrollbar"><code class="codeBlockLines_mRuA"><span class="token-line" style="color:#bfc7d5"><span class="token plain">name: &quot;my_submarine_env&quot;,</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">    vm-image: &quot;...&quot;,</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">    docker-image: &quot;...&quot;, </span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">    kernel: </span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">      name: team_default_python_3.7</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">      channels:</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        - defaults</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">      dependencies:</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        - _ipyw_jlab_nb_ext_conf=0.1.0=py37_0</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        - alabaster=0.7.12=py37_0</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        - anaconda=2020.02=py37_0</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        - anaconda-client=1.7.2=py37_0</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">        - anaconda-navigator=1.9.12=py37_0</span><br></span></code></pre><button type="button" aria-label="Copy code to clipboard" title="Copy" class="copyButton_eDfN clean-btn"><span class="copyButtonIcons_W9eQ" aria-hidden="true"><svg class="copyButtonIcon_XEyF" viewBox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg class="copyButtonSuccessIcon_i9w9" viewBox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div><p>When launch a new experiment / notebook session using the <code>my_submarine_env</code>, submarine server will use defined Docker image, and Conda kernel to launch of container. </p><h2 class="anchor anchorWithStickyNavbar_mojV" id="storage-of-environment">Storage of Environment<a class="hash-link" href="#storage-of-environment" title="Direct link to heading">​</a></h2><p>Environment of Submarine is just a simple text file, so it will be persisted in Submarine metastore, which is ideally a Database. </p><p>Docker image is stored inside a regular Docker registry, which will be handled outside of the system. </p><p>Conda dependencies are stored in Conda channel (where referenced packages are stored), which will be handled/setuped separately. (Popular conda channels are <code>default</code> and <code>conda-forge</code>)</p><p>For more detailed discussion about storage-related implementations, please refer to <a href="/zh-cn/docs/next/designDocs/storage-implementation">storage-implementation</a>.</p><h2 class="anchor anchorWithStickyNavbar_mojV" id="how-to-implement-to-make-user-can-easily-use-submarine-environments">How to implement to make user can easily use Submarine environments?<a class="hash-link" href="#how-to-implement-to-make-user-can-easily-use-submarine-environments" title="Direct link to heading">​</a></h2><p>We like simplicities, and we don&#x27;t want to leak complexities of implementations to the users. To make it happen, we have to do some works to hide complexities. </p><p>There&#x27;re two primary uses of environments: experiments and notebook, for both of them, users should not do works like explictily call <code>conda active $env_name</code> to active environments. To make it happen, what we can do is to include following parts in Dockerfile </p><div class="codeBlockContainer_I0IT theme-code-block"><div class="codeBlockContent_wNvx" style="color:#bfc7d5;background-color:#292d3e"><pre tabindex="0" class="prism-code language-text codeBlock_jd64 thin-scrollbar"><code class="codeBlockLines_mRuA"><span class="token-line" style="color:#bfc7d5"><span class="token plain">FROM ubuntu:18.04</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">&lt;Include whatever base-libraries like CUDA, etc.&gt;</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">&lt;Make sure conda (with our preferred version) is installed&gt;</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">&lt;Make sure Jupyter (with our preferred version) is installed&gt;</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain"># This is just a sample of Dockerfile, users can do more customizations if needed</span><br></span><span class="token-line" style="color:#bfc7d5"><span class="token plain">ENTRYPOINT [&quot;/submarine-bootstrap.sh&quot;]</span><br></span></code></pre><button type="button" aria-label="Copy code to clipboard" title="Copy" class="copyButton_eDfN clean-btn"><span class="copyButtonIcons_W9eQ" aria-hidden="true"><svg class="copyButtonIcon_XEyF" viewBox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg class="copyButtonSuccessIcon_i9w9" viewBox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div><p>When Submarine Server (this is implementation detail of Submarine Server, user will not see it at all) launch an experiment, or notebook, it will invoke following <code>docker run</code> command (or any other equvilant like using K8s spec): </p><div class="codeBlockContainer_I0IT theme-code-block"><div class="codeBlockContent_wNvx" style="color:#bfc7d5;background-color:#292d3e"><pre tabindex="0" class="prism-code language-text codeBlock_jd64 thin-scrollbar"><code class="codeBlockLines_mRuA"><span class="token-line" style="color:#bfc7d5"><span class="token plain">docker run &lt;submarine_docker_image&gt; --kernel &lt;kernel_name&gt; -- .... python train.py --batch_size 5 (and other parameters)</span><br></span></code></pre><button type="button" aria-label="Copy code to clipboard" title="Copy" class="copyButton_eDfN clean-btn"><span class="copyButtonIcons_W9eQ" aria-hidden="true"><svg class="copyButtonIcon_XEyF" viewBox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg class="copyButtonSuccessIcon_i9w9" viewBox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div><p>Similarily, to launch a notebook: </p><div class="codeBlockContainer_I0IT theme-code-block"><div class="codeBlockContent_wNvx" style="color:#bfc7d5;background-color:#292d3e"><pre tabindex="0" class="prism-code language-text codeBlock_jd64 thin-scrollbar"><code class="codeBlockLines_mRuA"><span class="token-line" style="color:#bfc7d5"><span class="token plain">docker run &lt;submarine_docker_image&gt; --kernel &lt;kernel_name&gt; -- .... jupyter</span><br></span></code></pre><button type="button" aria-label="Copy code to clipboard" title="Copy" class="copyButton_eDfN clean-btn"><span class="copyButtonIcons_W9eQ" aria-hidden="true"><svg class="copyButtonIcon_XEyF" viewBox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg class="copyButtonSuccessIcon_i9w9" viewBox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div><p>The <code>submarine-bootstrap.sh</code> is part of Submarine repo, and will handle <code>--kernel</code> argument which will invoke  <code>conda active $kernel_name</code> before anything else. (Like run the training job).</p></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="theme-doc-footer-edit-meta-row row"><div class="col"><a href="https://github.com/apache/submarine/edit/master/website/docs/designDocs/environments-implementation.md" target="_blank" rel="noreferrer noopener" class="theme-edit-this-page"><svg fill="currentColor" height="20" width="20" viewBox="0 0 40 40" class="iconEdit_dcUD" aria-hidden="true"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this page</a></div><div class="col lastUpdated_foO9"></div></div></footer></article><nav class="pagination-nav docusaurus-mt-lg" aria-label="Docs pages navigation"><div class="pagination-nav__item"><a class="pagination-nav__link" href="/zh-cn/docs/next/designDocs/implementation-notes"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">Implementation Notes</div></a></div><div class="pagination-nav__item pagination-nav__item--next"><a class="pagination-nav__link" href="/zh-cn/docs/next/designDocs/experiment-implementation"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">Experiment Implementation</div></a></div></nav></div></div><div class="col col--3"><div class="tableOfContents_cNA8 thin-scrollbar theme-doc-toc-desktop"><ul class="table-of-contents table-of-contents__left-border"><li><a href="#overview" class="table-of-contents__link toc-highlight">Overview</a></li><li><a href="#environment-api-definition" class="table-of-contents__link toc-highlight">Environment API definition</a></li><li><a href="#vm-image-and-docker-image" class="table-of-contents__link toc-highlight">VM-image and Docker-image</a></li><li><a href="#kernel-implementation" class="table-of-contents__link toc-highlight">Kernel Implementation</a></li><li><a href="#storage-of-environment" class="table-of-contents__link toc-highlight">Storage of Environment</a></li><li><a href="#how-to-implement-to-make-user-can-easily-use-submarine-environments" class="table-of-contents__link toc-highlight">How to implement to make user can easily use Submarine environments?</a></li></ul></div></div></div></div></main></div></div><footer class="footer footer--dark"><div class="container container-fluid"><div class="row footer__links"><div class="col footer__col"><div class="footer__title">文档</div><ul class="footer__items"><li class="footer__item"><a class="footer__link-item" href="/zh-cn/docs/gettingStarted/quickstart">入门教程</a></li><li class="footer__item"><a class="footer__link-item" href="/zh-cn/docs/api/environment">API 文档</a></li></ul></div><div class="col footer__col"><div class="footer__title">社区</div><ul class="footer__items"><li class="footer__item"><a href="https://stackoverflow.com/questions/tagged/apache-submarine" target="_blank" rel="noopener noreferrer" class="footer__link-item">Stack Overflow<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_I5OW"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li><li class="footer__item"><a href="https://s.apache.org/slack-invite" target="_blank" rel="noopener noreferrer" class="footer__link-item">Slack<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_I5OW"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li></ul></div><div class="col footer__col"><div class="footer__title">更多</div><ul class="footer__items"><li class="footer__item"><a href="https://medium.com/@apache.submarine" target="_blank" rel="noopener noreferrer" class="footer__link-item">博客</a></li><li class="footer__item"><a href="https://github.com/apache/submarine" target="_blank" rel="noopener noreferrer" class="footer__link-item">GitHub<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_I5OW"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li></ul></div></div><div class="footer__bottom text--center"><div class="margin-bottom--sm"><a href="https://www.apache.org/" target="_blank" rel="noopener noreferrer" class="footerLogoLink_gHmE"><img src="https://hadoop.apache.org/asf_logo_wide.png" alt="Apache Open Source Logo" class="themedImage_W2Cr themedImage--light_TfLj footer__logo"><img src="https://hadoop.apache.org/asf_logo_wide.png" alt="Apache Open Source Logo" class="themedImage_W2Cr themedImage--dark_oUvU footer__logo"></a></div><div class="footer__copyright">Apache Submarine, Submarine, Apache, the Apache feather logo, and the Apache Submarine project logo are
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