Docker containers in Windows "look" like VMs...

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class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" > <div class="message-userDetails"> <span class="message-name"><span class="username " dir="auto" data-user-id="503639">fog37</span></span>   <span class="threadstarter" data-xf-init="tooltip" title="Thread Starter"><i class="fal fa-user-edit"></i></span>   </div> <div class="message-userExtras"> <dl class="pairs pairs--justified"> <dt><i class="fa--xf fal fa-comments fa-fw" aria-hidden="true" data-xf-init="tooltip" title="Messages"></i></dt> <dd>1,569</dd> </dl> <dl class="pairs pairs--justified"> <dt><i class="fa--xf fal fa-thumbs-up fa-fw" aria-hidden="true" data-xf-init="tooltip" title="Reaction score"></i></dt> <dd>108</dd> </dl> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-7057968" data-lb-caption-desc="fog37 · Feb 10, 2024 at 2:34 PM"> <article class="message-body js-selectToQuote"> <div > <div class="bbWrapper">Hello,<br /> <br /> I am trying to better understand how Docker works under the hood in Windows...I get the difference between virtual machines (guest OS on top of a host OS) and containers (which work with the host OS)...The Docker desktop installation process seems to automatically install both Hyper V and WSL 2 (which is different from WSL1...Hyper V a type of lightweight hypervisor to run and manage virtual machines and WSL2 is really a Linux OS virtual machine... If so, then running Docker in Windows seems to be like running a virtual machine and not a container..<br /> <br /> IF the Dockerfile first line is <b><i>FROM python :3, </i></b>it means that we are instructing the docker engine to go on Docker hub and downloaed a Docker parent image containing the interpreter python as well as the Linux distribution Alpine....I get Docker is truly a linux application. Now we have both the Alpine Linux distribution and WSL2 which seem to be two Linux operating systems...Again, that looks more like a virtual machine than a container: we have Windows (our host OS), Alpine, and WSL2...<br /> <br /> Thank you!</div> </div> <div class="js-selectToQuoteEnd"> </div> <div class="googleads_fixed"> <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-6580726045122001" crossorigin="anonymous"></script>  <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-6580726045122001" data-ad-slot="3049969336" data-ad-format="auto" data-full-width-responsive="true"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script> </div> </article> </div> </div> <footer class="message-footer"> <div class="reactionsBar js-reactionsList "> </div> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article>  <div class="message-cell message-cell--main" id="post-physorg"> <a href="https://phys.org/technology-news/" target="_blank">Technology news</a> on Phys.org <ul class="phys_items"> <li><a href="https://techxplore.com/news/2024-02-team-fuel-cell-durability-fatigue.html" target="_blank">Research team improves fuel cell durability with fatigue-resistant membranes</a></li> <li><a href="https://techxplore.com/news/2024-02-extinguishing-batteries-deadly-battery.html" target="_blank">Self-extinguishing batteries could reduce the risk of deadly and costly battery fires</a></li> <li><a href="https://techxplore.com/news/2024-02-chemists-decipher-reaction-lithium-sulfur.html" target="_blank">Chemists decipher reaction process that could improve lithium-sulfur batteries</a></li> </ul> </div> <article class="message message--post js-post js-inlineModContainer " data-author="jedishrfu" data-content="post-7059560" id="js-post-7059560" itemscope itemtype="https://schema.org/Comment" itemid="https://www.physicsforums.com/posts/7059560/"> <meta itemprop="parentItem" itemscope itemid="https://www.physicsforums.com/threads/docker-containers-in-windows-look-like-vms.1059885/" /> <span class="u-anchorTarget" id="post-7059560"></span> <div class="message-header"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <time class="u-dt" dir="auto" datetime="2024-02-15T12:21:50-0600" data-time="1708021310" data-date-string="Feb 15, 2024" data-time-string="12:21 PM" title="Feb 15, 2024 at 12:21 PM" itemprop="datePublished">Feb 15, 2024</time> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <span style="cursor:pointer;" data-xf-init="share-tooltip" data-href="/posts/7059560/share" aria-label="Share" role="button" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </span> </li> <li> #2 </li> </ul> </header> </div> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.physicsforums.com/members/jedishrfu.376845/"> <meta itemprop="url" content="https://www.physicsforums.com/members/jedishrfu.376845/" /> <div class="message-userDetails"> <span class="message-name"><a href="/members/jedishrfu.376845/" class="username " dir="auto" data-user-id="376845" data-xf-init="member-tooltip"><span class="username--staff username--moderator" itemprop="name">jedishrfu</span></a></span>    <div class="post-badges"> <div class="post-badge badge-mentor" data-xf-init="tooltip" title="PF Community Staff"> <i class="fa--xf fal fa-user-graduate" aria-hidden="true"></i><span> Mentor</span> </div> <div class="post-badge badge-file" data-xf-init="tooltip" title="Click to View My Articles"> <a href="https://www.physicsforums.com/insights/author/jedishrfu/"><i class="fa--xf fal fa-file-alt" aria-hidden="true"></i><span> Insights Author</span></a> </div> </div>  </div> <div class="message-userExtras"> <dl class="pairs pairs--justified"> <dt><i class="fa--xf fal fa-comments fa-fw" aria-hidden="true" data-xf-init="tooltip" title="Messages"></i></dt> <dd>15,152</dd> </dl> <dl class="pairs pairs--justified"> <dt><i class="fa--xf fal fa-thumbs-up fa-fw" aria-hidden="true" data-xf-init="tooltip" title="Reaction score"></i></dt> <dd>9,728</dd> </dl> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-7059560" data-lb-caption-desc="jedishrfu · Feb 15, 2024 at 12:21 PM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper">Docker is a linux technology that runs on windows and macos. On Linux, it takes advantage of some Linux security protections to run code in a sort of sandbox using the same OS. This makes Docker containers very light-weight and reduces system resource usage on a Linux host.<br /> <br /> When running on Windows there has to be a VM to run Docker inside. Windows provides the WSL subsystem for that and it is a VM that looks like a linux environment to Docker. It was quite "inspired" by MS to offer this but I guess they saw the writing on the wall with developers bouncing between the two environments. I know they resisted this approach for a long time forcing people to have two machines, or log into a linux machine or use dual boot...<br /> <br /> <a href="https://en.wikipedia.org/wiki/Windows_Subsystem_for_Linux" target="_blank" class="link link--external" rel="noopener">https://en.wikipedia.org/wiki/Windows_Subsystem_for_Linux</a><br /> <br /> One thing that I found cool was that the MS VS code editor works in both environments via a web service that runs inside the WSL environment and does the CRLF conversion seamlessly between them. It allows developers to span the environments much more easily.</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList "> </div> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> </div> </div> </div> </article>  <article class="message message--post js-post js-inlineModContainer " data-author="Vanadium 50" data-content="post-7059563" id="js-post-7059563" itemscope itemtype="https://schema.org/Comment" itemid="https://www.physicsforums.com/posts/7059563/"> <meta itemprop="parentItem" itemscope itemid="https://www.physicsforums.com/threads/docker-containers-in-windows-look-like-vms.1059885/" /> <span class="u-anchorTarget" id="post-7059563"></span> <div class="message-header"> <header class="message-attribution message-attribution--split"> <ul class="message-attribution-main listInline "> <li class="u-concealed"> <time class="u-dt" dir="auto" datetime="2024-02-15T12:46:50-0600" data-time="1708022810" data-date-string="Feb 15, 2024" data-time-string="12:46 PM" title="Feb 15, 2024 at 12:46 PM" itemprop="datePublished">Feb 15, 2024</time> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <span style="cursor:pointer;" data-xf-init="share-tooltip" data-href="/posts/7059563/share" aria-label="Share" role="button" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </span> </li> <li> #3 </li> </ul> </header> </div> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.physicsforums.com/members/vanadium-50.110252/"> <meta itemprop="url" content="https://www.physicsforums.com/members/vanadium-50.110252/" /> <div class="message-userDetails"> <span class="message-name"><a href="/members/vanadium-50.110252/" class="username " dir="auto" data-user-id="110252" data-xf-init="member-tooltip"><span itemprop="name">Vanadium 50</span></a></span>    <div class="post-badges"> <div class="post-badge badge-shield" data-xf-init="tooltip" title="Retired Mentor"> <i class="fa--xf fal fa-shield" aria-hidden="true" style="font-size:12px;color:#990033;"></i><span> Staff Emeritus</span> </div> <div class="post-badge badge-university" data-xf-init="tooltip" title="Verified Expert in Science and Math"> <i class="fa--xf fal fa-university" aria-hidden="true"></i><span> Science Advisor</span> </div> <div class="post-badge badge-book" data-xf-init="tooltip" title="Verified Expert in Academia"> <i class="fa--xf fal fa-book" aria-hidden="true"></i><span> Education Advisor</span> </div> </div>  </div> <div class="message-userExtras"> <dl class="pairs pairs--justified"> <dt><i class="fa--xf fal fa-comments fa-fw" aria-hidden="true" data-xf-init="tooltip" title="Messages"></i></dt> <dd>35,001</dd> </dl> <dl class="pairs pairs--justified"> <dt><i class="fa--xf fal fa-thumbs-up fa-fw" aria-hidden="true" data-xf-init="tooltip" title="Reaction score"></i></dt> <dd>21,674</dd> </dl> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-7059563" data-lb-caption-desc="Vanadium 50 · Feb 15, 2024 at 12:46 PM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper">It is probably worth pointing out that the distinction between "sandbox' and "full virtual machine" is also a matter of degree. The CPU is still executing the instructions like it always did.</div> </div> <div class="js-selectToQuoteEnd"> </div> <div class="googleads_fixed"> <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-6580726045122001" crossorigin="anonymous"></script>  <ins class="adsbygoogle" style="display:block" data-ad-client="ca-pub-6580726045122001" data-ad-slot="5961342082" data-ad-format="auto" data-full-width-responsive="true"></ins> <script> (adsbygoogle = window.adsbygoogle || []).push({}); </script> </div> </article> </div> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList "> </div> <div class="js-historyTarget message-historyTarget toggleTarget" 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<li> <span style="cursor:pointer;" data-xf-init="share-tooltip" data-href="/posts/7059567/share" aria-label="Share" role="button" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </span> </li> <li> #4 </li> </ul> </header> </div> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.physicsforums.com/members/nsaspook.351035/"> <meta itemprop="url" content="https://www.physicsforums.com/members/nsaspook.351035/" /> <div class="message-userDetails"> <span class="message-name"><a href="/members/nsaspook.351035/" class="username " dir="auto" data-user-id="351035" data-xf-init="member-tooltip"><span itemprop="name">nsaspook</span></a></span>    <div class="post-badges"> <div class="post-badge badge-university" data-xf-init="tooltip" title="Verified Expert in Science and Math"> <i class="fa--xf fal fa-university" aria-hidden="true"></i><span> Science Advisor</span> </div> </div>  </div> <div class="message-userExtras"> <dl class="pairs pairs--justified"> <dt><i class="fa--xf fal fa-comments fa-fw" aria-hidden="true" data-xf-init="tooltip" title="Messages"></i></dt> <dd>1,395</dd> </dl> <dl class="pairs pairs--justified"> <dt><i class="fa--xf fal fa-thumbs-up fa-fw" aria-hidden="true" data-xf-init="tooltip" title="Reaction score"></i></dt> <dd>4,143</dd> </dl> </div> <span class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-7059567" data-lb-caption-desc="nsaspook · Feb 15, 2024 at 12:54 PM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper"><span data-s9e-mediaembed="youtube"><span><span data-s9e-mediaembed-c2l="youtube" data-s9e-mediaembed-c2l-background="linear-gradient(0deg,rgba(0,0,0,0) 0,rgba(0,0,0,0) 72%,rgba(0,0,0,.04) 79%,rgba(0,0,0,.1) 83%,rgba(0,0,0,.25) 88%,rgba(0,0,0,.67) 100%),url(https://i.ytimg.com/vi/a1M_thDTqmU/hqdefault.jpg) 50% 50% / cover" data-s9e-mediaembed-c2l-oembed-id="a1M_thDTqmU" data-s9e-mediaembed-c2l-oembed-title="Virtual Machine (VM) vs Docker" data-s9e-mediaembed-iframe='["allowfullscreen","","scrolling","no","allow","autoplay","src","https:\/\/www.youtube.com\/embed\/a1M_thDTqmU?autoplay=1"]'></span></span></span><br /> <br /> I use Docker to run a specific Home Assistant Linux 'environment' on a general Linux server that handles other networking and processing capabilities for the programs running inside the Docker 'environment'.</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta 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data-time="1708025298" data-date-string="Feb 15, 2024" data-time-string="1:28 PM" title="Feb 15, 2024 at 1:28 PM" itemprop="datePublished">Feb 15, 2024</time> </li> </ul> <ul class="message-attribution-opposite message-attribution-opposite--list "> <li> <span style="cursor:pointer;" data-xf-init="share-tooltip" data-href="/posts/7059573/share" aria-label="Share" role="button" rel="nofollow"> <i class="fa--xf fal fa-share-alt" aria-hidden="true"></i> </span> </li> <li> #5 </li> </ul> </header> </div> <div class="message-inner"> <div class="message-cell message-cell--user"> <section class="message-user" itemprop="author" itemscope itemtype="https://schema.org/Person" itemid="https://www.physicsforums.com/members/jedishrfu.376845/"> <meta itemprop="url" content="https://www.physicsforums.com/members/jedishrfu.376845/" /> <div class="message-userDetails"> <span class="message-name"><a href="/members/jedishrfu.376845/" class="username " dir="auto" data-user-id="376845" 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class="message-userArrow"></span> </section> </div> <div class="message-cell message-cell--main"> <div class="message-main js-quickEditTarget"> <div class="message-content js-messageContent"> <div class="message-userContent lbContainer js-lbContainer " data-lb-id="post-7059573" data-lb-caption-desc="jedishrfu · Feb 15, 2024 at 1:28 PM"> <article class="message-body js-selectToQuote"> <div itemprop="text"> <div class="bbWrapper"><blockquote data-attributes="member: 110252" data-quote="Vanadium 50" data-source="post: 7059563" class="bbCodeBlock bbCodeBlock--expandable bbCodeBlock--quote js-expandWatch"> <div class="bbCodeBlock-title"> Vanadium 50 said: </div> <div class="bbCodeBlock-content"> <div class="bbCodeBlock-expandContent js-expandContent "> It is probably worth pointing out that the distinction between "sandbox' and "full virtual machine" is also a matter of degree. The CPU is still executing the instructions like it always did. </div> </div> </blockquote>Yes, this brings up an interesting scenario. Commodore 64 family of machines are emulated in the VICE application. Its like a VM that executes 6502 code on any machine hosting VICE. That means that the 6502 code is "translated" in equivalent machine code of the host machine to run. They even simulate the Commodore address space for peeks and pokes.<br /> <br /> I would consider VICE a full blown VM vs something like WSL that runs linux on Windows where the opcodes of the image are the same as the host ie you wouldn't install an Apple M2 linux image on WSL if it is running on an Intel processor since the opcodes are different.</div> </div> <div class="js-selectToQuoteEnd"> </div> </article> </div> </div> <footer class="message-footer"> <div class="message-microdata" itemprop="interactionStatistic" itemtype="https://schema.org/InteractionCounter" itemscope> <meta itemprop="userInteractionCount" content="0" /> <meta itemprop="interactionType" content="https://schema.org/LikeAction" /> </div> <div class="reactionsBar js-reactionsList "> </div> <div class="js-historyTarget message-historyTarget toggleTarget" data-href="trigger-href"></div> </footer> <script> if (typeof parseNewPost == 'function') { $(document).ajaxStop(parseNewPost(7059573)); } </script> </div> </div> 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If so, then running Docker in Windows seems to be like running a virtual machine and not a container..\n\nIF the Dockerfile first line is FROM python :3, it means that we are instructing the docker engine to go on Docker hub and downloaed a Docker parent image containing the interpreter python as well as the Linux distribution Alpine....I get Docker is truly a linux application. Now we have both the Alpine Linux distribution and WSL2 which seem to be two Linux operating systems...Again, that looks more like a virtual machine than a container: we have Windows (our host OS), Alpine, and WSL2...\n\nThank you!" }, "publisher": { "@type": "Organization", "name": "Physics Forums: Science Discussion, Homework Help, Articles", "alternateName": "Physics Forums", "description": "Join Physics Forums, where students, scientists, and enthusiasts come together to explore and discuss the current understanding and practice of various scientific fields.", "url": "https://www.physicsforums.com", "logo": "https://www.physicsforums.com/styles/physicsforums/images/physics-forums-logo-og.png" } } </script> <script type="text/javascript" src="https://www.physicsforums.com/copyright.js" defer></script> <script> function parseNewPost(postid) { var newpost = document.getElementById("js-post-" + postid), npa = [newpost]; MathJax.typeset(npa); } function parsePreview() { var preview = document.getElementsByClassName("xfPreview"); MathJax.typeset(preview); } function parseNewConversationPost(postid) { var newpost = document.getElementsByClassName("convMessage-" + postid); MathJax.typeset(newpost); } function parseNewProfilePost(postid) { var newpost = document.getElementById("js-profilePost-" + postid), npa = [newpost]; MathJax.typeset(npa); } function parseTooltip() { MathJax.typeset(); } </script> </body> </html>

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Docker containers in Windows "look" like VMs...