{"id":4907,"date":"2026-10-14T02:05:37","date_gmt":"2026-10-13T20:35:37","guid":{"rendered":"https:\/\/itsupportwale.com\/blog\/docker-install-a-complete-step-by-step-setup-guide\/"},"modified":"2026-10-14T02:05:37","modified_gmt":"2026-10-13T20:35:37","slug":"docker-install-a-complete-step-by-step-setup-guide","status":"publish","type":"post","link":"https:\/\/itsupportwale.com\/blog\/docker-install-a-complete-step-by-step-setup-guide\/","title":{"rendered":"Docker Install: A Complete Step-by-Step Setup Guide"},"content":{"rendered":"<p>It is 3:14 AM. The PagerDuty alert didn\u2019t just wake me up; it vibrated my soul out of my body. The alert says <code>service-auth-gateway<\/code> is throwing 500s. I check the logs. It\u2019s a library mismatch. Again. Some junior developer\u2014let\u2019s call him Kyle\u2014pushed a &#8220;hotfix&#8221; that relied on a specific version of <code>libssl<\/code> that exists only on his Fedora Rawhide workstation. Production is running Debian Bullseye. The binary linked to a ghost. The process crashed. The orchestrator tried to restart it. It crashed again. A death loop. <\/p>\n<p>This is why we are here. This is why I am sitting in the dark, illuminated only by the cold blue light of three monitors, preparing to perform another <code>docker install<\/code> on a fresh node because the old one\u2019s filesystem turned into a read-only brick of sludge. We don&#8217;t use Docker because it\u2019s good. We use it because developers cannot be trusted to manage their own dependencies, and I am tired of being the janitor who mops up their spilled shared objects. Docker is the industrial-grade hazmat suit we force onto the code so it doesn&#8217;t infect the rest of the host. <\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_80 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-6aceac4a7d2ea\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6aceac4a7d2ea\"  aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/itsupportwale.com\/blog\/docker-install-a-complete-step-by-step-setup-guide\/#The_Lie_of_Portability\" >The Lie of Portability<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/itsupportwale.com\/blog\/docker-install-a-complete-step-by-step-setup-guide\/#The_GPG_Keyring_Purgatory\" >The GPG Keyring Purgatory<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/itsupportwale.com\/blog\/docker-install-a-complete-step-by-step-setup-guide\/#The_Repository_Swamp\" >The Repository Swamp<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/itsupportwale.com\/blog\/docker-install-a-complete-step-by-step-setup-guide\/#The_Daemon_A_Leaky_Valve_in_the_Engine_Room\" >The Daemon: A Leaky Valve in the Engine Room<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/itsupportwale.com\/blog\/docker-install-a-complete-step-by-step-setup-guide\/#Namespaces_Cardboard_Walls_in_a_Burning_Building\" >Namespaces: Cardboard Walls in a Burning Building<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/itsupportwale.com\/blog\/docker-install-a-complete-step-by-step-setup-guide\/#The_Non-Root_User_Illusion\" >The Non-Root User Illusion<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/itsupportwale.com\/blog\/docker-install-a-complete-step-by-step-setup-guide\/#The_Storage_Driver_Abyss\" >The Storage Driver Abyss<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/itsupportwale.com\/blog\/docker-install-a-complete-step-by-step-setup-guide\/#The_Inevitable_Decay\" >The Inevitable Decay<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/itsupportwale.com\/blog\/docker-install-a-complete-step-by-step-setup-guide\/#Related_Articles\" >Related Articles<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"The_Lie_of_Portability\"><\/span>The Lie of Portability<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The marketing tells you that containers are lightweight. They tell you it\u2019s &#8220;build once, run anywhere.&#8221; That is a lie. It\u2019s &#8220;build once, debug everywhere.&#8221; Before you even think about the <code>docker install<\/code> command, you have to realize you\u2019re just trading one set of problems for a more complex, obscured set of problems. You\u2019re not fixing the dependency hell; you\u2019re just burying it in a layer of YAML and virtualized networking.<\/p>\n<p>When I start a <code>docker install<\/code>, I\u2019m not &#8220;enabling innovation.&#8221; I\u2019m building a cage. I\u2019m setting up a system of cgroups and namespaces to ensure that when Kyle\u2019s code inevitably leaks memory like a rusted pipe in a basement, it only drowns his specific container and doesn&#8217;t take down the entire kernel. <\/p>\n<p>First, we have to purge the old sins. Every Linux distribution has its own broken, outdated version of the Docker engine sitting in its default repositories like stagnant water. If you run <code>apt-get install docker.io<\/code>, you\u2019re inviting a ghost from 2018 into your house. We have to clear the deck.<\/p>\n<pre class=\"codehilite\"><code class=\"language-bash\"># Removing the debris of previous failed attempts\nfor pkg in docker.io docker-doc docker-compose docker-compose-v2 podman-docker containerd runc; do \n    sudo apt-get remove -y $pkg; \ndone\n<\/code><\/pre>\n<p>This doesn&#8217;t actually clean anything. It just removes the binaries. The config files, the broken network interfaces, the orphaned volumes\u2014those stay. They\u2019re like asbestos in the walls. You just hope you don&#8217;t disturb them.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"The_GPG_Keyring_Purgatory\"><\/span>The GPG Keyring Purgatory<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Now we get to the security theater. We can\u2019t just download a package. We have to verify it. We have to dance the dance of the GPG keys. This is the part where the &#8220;magic&#8221; of the internet usually fails because of a corporate proxy or a transient DNS hiccup. <\/p>\n<p>We need to create a directory for the keyring. Not just any directory. It has to have the right permissions, or the system will complain with the stoic indifference of a bureaucrat. <\/p>\n<pre class=\"codehilite\"><code class=\"language-bash\">sudo install -m 0755 -d \/etc\/apt\/keyrings\ncurl -fsSL https:\/\/download.docker.com\/linux\/debian\/gpg | sudo gpg --dearmor -o \/etc\/apt\/keyrings\/docker.gpg\nsudo chmod a+r \/etc\/apt\/keyrings\/docker.gpg\n<\/code><\/pre>\n<p>Look at that <code>curl -fsSL<\/code> command. We are piping a script from the internet directly into a root-owned keyring. This is what passes for &#8220;best practice&#8221; in the modern era. It\u2019s like drinking water directly from a storm drain because the city told you it was filtered. If the Docker CDN gets compromised, my entire cluster is a playground for whatever state-sponsored actor wants to mine Monero on my dime. <\/p>\n<p>Once the key is in place, we have to tell <code>apt<\/code> where to find the actual sludge. We have to echo a string into a <code>.list<\/code> file. <\/p>\n<pre class=\"codehilite\"><code class=\"language-bash\">echo \\\n  &quot;deb [arch=$(dpkg --print-architecture) signed-by=\/etc\/apt\/keyrings\/docker.gpg] https:\/\/download.docker.com\/linux\/debian \\\n  $(. \/etc\/os-release &amp;&amp; echo &quot;$VERSION_CODENAME&quot;) stable&quot; | \\\n  sudo tee \/etc\/apt\/sources.list.d\/docker.list &gt; \/dev\/null\n<\/code><\/pre>\n<p>The <code>$(. \/etc\/os-release &amp;&amp; echo \"$VERSION_CODENAME\")<\/code> part is particularly galling. We are relying on the OS to identify itself correctly so we can fetch the right version of a tool that is supposed to make the OS irrelevant. The irony is thick enough to clog a drain.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"The_Repository_Swamp\"><\/span>The Repository Swamp<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>After the repository is added, we run <code>apt-get update<\/code>. This is the moment of truth. This is where you find out if your MTU settings are slightly off, causing the connection to hang indefinitely, or if the repository mirror is having a bad day. <\/p>\n<pre class=\"codehilite\"><code class=\"language-text\">Hit:1 http:\/\/deb.debian.org\/debian bullseye InRelease\nGet:2 http:\/\/deb.debian.org\/debian-security bullseye-security InRelease [48.4 kB]\nGet:3 https:\/\/download.docker.com\/linux\/debian bullseye InRelease [43.3 kB]\nGet:4 https:\/\/download.docker.com\/linux\/debian bullseye\/stable amd64 Packages [24.9 kB]\nFetched 116 kB in 1s (112 kB\/s)\nReading package lists... Done\n<\/code><\/pre>\n<p>It worked. This time. But don&#8217;t get comfortable. Now we actually perform the <code>docker install<\/code>. We aren&#8217;t just installing &#8220;Docker.&#8221; We are installing a suite of tools, each with its own potential for catastrophic failure. <code>docker-ce<\/code>, <code>docker-ce-cli<\/code>, <code>containerd.io<\/code>, <code>docker-buildx-plugin<\/code>, and <code>docker-compose-plugin<\/code>. <\/p>\n<pre class=\"codehilite\"><code class=\"language-bash\">sudo apt-get install -y docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin\n<\/code><\/pre>\n<p>Why are there five different packages? Because &#8220;Docker&#8221; isn&#8217;t a single tool anymore. It\u2019s a fragmented ecosystem of components that used to be one cohesive unit but were broken apart to satisfy the whims of architectural purists. It\u2019s like taking a perfectly functional car and deciding that the steering wheel, the tires, and the engine should all be sold by different vendors and bolted together at the last second.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"The_Daemon_A_Leaky_Valve_in_the_Engine_Room\"><\/span>The Daemon: A Leaky Valve in the Engine Room<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Once the binaries are on the disk, the <code>dockerd<\/code> daemon starts. This is the heart of the beast. It runs as root. It has total control over your network stack. It can create bridges, modify <code>iptables<\/code>, and mount filesystems. It is a monolithic god-process that we all just accept because the alternative is manual LXC configuration, which is a form of psychological torture I wouldn&#8217;t wish on my worst enemy.<\/p>\n<p>I need to check if it\u2019s actually alive.<\/p>\n<pre class=\"codehilite\"><code class=\"language-text\"># docker version\nClient: Docker Engine - Community\n Version:           24.0.7\n API version:       1.43\n Go version:        go1.20.10\n Git commit:        afdd53b\n Built:             Thu Oct 26 09:07:41 2023\n OS\/Arch:           linux\/amd64\n Context:           default\n\nServer: Docker Engine - Community\n Engine:\n  Version:          24.0.7\n  API version:      1.43 (minimum version 1.12)\n  Go version:       go1.20.10\n  Git commit:       311b9ff\n  Built:            Thu Oct 26 09:07:41 2023\n  OS\/Arch:          linux\/amd64\n  Experimental:     false\n containerd:\n  Version:          1.6.24\n  GitCommit:        61f9fd28f25cb100dd59cc37123989791427b9d7\n runc:\n  Version:          1.1.9\n  GitCommit:        v1.1.9-0-gccaecfc\n docker-init:\n  Version:          0.19.0\n  GitCommit:        de40ad0\n<\/code><\/pre>\n<p>Look at that API version: 1.43. Every time that number increments, something breaks. A flag is deprecated. A default behavior changes. A security patch introduces a regression in how volumes are mounted. <\/p>\n<p>Now, we have to configure the daemon. By default, Docker is chatty and dangerous. It logs everything to JSON files that grow until they consume the entire disk. I\u2019ve lost more production nodes to <code>json-file<\/code> log exhaustion than to actual traffic. You have to throttle it. You have to put a regulator on the valve.<\/p>\n<p>I open <code>\/etc\/docker\/daemon.json<\/code>. It\u2019s usually empty or doesn&#8217;t exist. I have to manifest it.<\/p>\n<pre class=\"codehilite\"><code class=\"language-json\">{\n  &quot;log-driver&quot;: &quot;json-file&quot;,\n  &quot;log-opts&quot;: {\n    &quot;max-size&quot;: &quot;10m&quot;,\n    &quot;max-file&quot;: &quot;3&quot;\n  },\n  &quot;storage-driver&quot;: &quot;overlay2&quot;,\n  &quot;live-restore&quot;: true,\n  &quot;ipv6&quot;: false\n}\n<\/code><\/pre>\n<p>The <code>live-restore<\/code> flag is a desperate plea. It tells Docker: &#8220;If the daemon crashes or needs an update, please, for the love of all that is holy, do not kill the containers.&#8221; It\u2019s like trying to change the oil in a car while it\u2019s doing 70 mph on the freeway. Sometimes it works. Sometimes you lose a finger.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Namespaces_Cardboard_Walls_in_a_Burning_Building\"><\/span>Namespaces: Cardboard Walls in a Burning Building<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>To understand why we do a <code>docker install<\/code>, you have to understand what\u2019s happening in the kernel. We are using <code>namespaces<\/code> and <code>cgroups<\/code>. <\/p>\n<p>Namespaces provide the illusion of isolation. The process thinks it\u2019s alone. It thinks it has its own network stack, its own process tree, its own mount points. But it\u2019s a lie. It\u2019s all sharing the same kernel. If a process triggers a kernel panic, the whole host goes down. The &#8220;container&#8221; is just a fancy wrapper around a <code>clone()<\/code> syscall with specific flags like <code>CLONE_NEWPID<\/code> or <code>CLONE_NEWNET<\/code>. It\u2019s like putting cardboard dividers in a hospital ward and pretending it prevents the spread of a virus.<\/p>\n<p>Then there are <code>cgroups<\/code> (control groups). This is the plumbing that limits how much &#8220;sludge&#8221; a container can pump out. If I don&#8217;t set these, Kyle\u2019s Python script will eat 100% of the CPU and 64GB of RAM in three seconds. <\/p>\n<pre class=\"codehilite\"><code class=\"language-bash\"># Example of the limits we have to manually enforce because the defaults are &quot;unlimited&quot;\ndocker run -d --name kyles-disaster --memory=&quot;512m&quot; --cpus=&quot;0.5&quot; my-broken-app:latest\n<\/code><\/pre>\n<p>But even with cgroups, there are leaks. The kernel\u2019s slab memory isn&#8217;t always properly accounted for. The <code>overlay2<\/code> storage driver\u2014the current industry standard\u2014is a complex layering system that merges a lower read-only layer with an upper writable layer. It\u2019s efficient until you have thousands of small files, at which point the inode usage skyrockets and the filesystem starts screaming. I\u2019ve spent nights cleaning up <code>\/var\/lib\/docker\/overlay2<\/code> like I\u2019m scrubbing grease off a factory floor.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"The_Non-Root_User_Illusion\"><\/span>The Non-Root User Illusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>After the <code>docker install<\/code>, the next thing every tutorial tells you to do is add your user to the <code>docker<\/code> group. <\/p>\n<pre class=\"codehilite\"><code class=\"language-bash\">sudo usermod -aG docker $USER\n<\/code><\/pre>\n<p>This is a security nightmare. Giving a user access to the Docker socket is equivalent to giving them root access. Anyone in the <code>docker<\/code> group can run <code>docker run -v \/:\/host -it alpine chroot \/host<\/code> and they are now root on the host machine. We do it anyway because typing <code>sudo<\/code> every time is &#8220;annoying.&#8221; We trade the entire security posture of the server for three fewer keystrokes. It\u2019s like leaving the vault door wide open because the key is heavy.<\/p>\n<p>And then there\u2019s the networking. Docker loves to mess with <code>iptables<\/code>. It inserts its own chains at the top of the list. It bypasses your carefully crafted firewall rules. You think your database port is closed to the world? Docker doesn&#8217;t care. If you map a port with <code>-p 5432:5432<\/code>, Docker will punch a hole straight through your firewall like a sledgehammer through drywall. <\/p>\n<p>To fix this, you have to set <code>{\"iptables\": false}<\/code> in <code>daemon.json<\/code>, but then you have to manually manage the NAT rules for the containers, which is a special kind of hell involving <code>MASQUERADE<\/code> targets and routing tables that look like a bowl of spaghetti. Most SREs just give up and let Docker have its way with the firewall. We just hope the VPC security groups catch what the host firewall misses.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"The_Storage_Driver_Abyss\"><\/span>The Storage Driver Abyss<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>We need to talk about <code>\/var\/lib\/docker<\/code>. This directory is the graveyard of a thousand failed deployments. Every time you run a <code>docker install<\/code>, you are creating a ticking time bomb in this directory. <\/p>\n<p>Docker uses a layered filesystem. When you pull an image, you\u2019re pulling layers. When you build an image, you\u2019re adding layers. Each layer is a diff. If you have a 1GB base image and you change one file, Docker doesn&#8217;t just store the change; it manages the metadata for the entire stack. <\/p>\n<p>Over time, the <code>overlay2<\/code> directory fills up with orphaned layers. The <code>docker system prune<\/code> command is supposed to be the janitor, but it\u2019s a timid one. It won&#8217;t touch anything it thinks might be in use. <\/p>\n<pre class=\"codehilite\"><code class=\"language-bash\"># The only command that keeps me from losing my mind\ndocker system prune -a --volumes --force\n<\/code><\/pre>\n<p>I\u2019ve seen this command reclaim 200GB of space on a &#8220;clean&#8221; system. Where did that space go? It was consumed by &#8220;dead&#8221; containers that the daemon forgot to reap. It was consumed by build caches for images that haven&#8217;t existed in six months. It\u2019s industrial waste, and we\u2019re just piling it up in the corner of the disk.<\/p>\n<p>And don&#8217;t get me started on the &#8220;User Namespaces&#8221; feature. It\u2019s supposed to map the root user inside the container to a non-privileged user on the host. It\u2019s a great idea on paper. In practice, it breaks every volume mount and permission setting you\u2019ve ever touched. You spend four hours trying to figure out why your app can\u2019t read its own config file, only to realize that UID 0 in the container is actually UID 100000 on the host, and the file is owned by UID 1000. It\u2019s a shell game where everyone loses.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"The_Inevitable_Decay\"><\/span>The Inevitable Decay<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>So, the <code>docker install<\/code> is finished. The daemon is running. The <code>daemon.json<\/code> is configured to prevent immediate disk death. The user is in the group, ready to bypass all security. The cgroups are ready to throttle the inevitable memory leaks. <\/p>\n<p>Is the system stable? No. <\/p>\n<p>Tomorrow, the <code>containerd<\/code> runtime will have a race condition during a high-load event. The week after, a kernel update will change how <code>iptables<\/code> handles the <code>DOCKER-USER<\/code> chain, and suddenly the staging environment will be reachable from the public internet. Or maybe the <code>overlay2<\/code> driver will hit an obscure bug where it fails to unmount a layer, preventing a container from stopping and leaving the system in a &#8220;zombie&#8221; state where you can&#8217;t kill the process even with <code>kill -9<\/code>.<\/p>\n<p>I\u2019ve seen it all. I\u2019ve seen the <code>veth<\/code> pairs multiply like rabbits until the kernel\u2019s networking table overflows. I\u2019ve seen the <code>docker-proxy<\/code> process consume 100% CPU because it\u2019s trying to handle 50,000 concurrent connections on a single port. <\/p>\n<p>We don&#8217;t install Docker because we want to. We install it because we have to contain the chaos. It\u2019s a heavy, clunky, leaky suit of armor, but it\u2019s all we have between us and the raw, unmanaged madness of &#8220;it works on my machine.&#8221;<\/p>\n<p>I\u2019m going back to sleep. Or I\u2019m going to try. But I know as soon as I close my eyes, the <code>docker-compose<\/code> plugin will decide that it doesn&#8217;t like the syntax of a file that hasn&#8217;t changed in three years, or the GPG key I just installed will be revoked because of some security breach at a company I\u2019ve never heard of. <\/p>\n<p>The containers are running. For now. But the pipes are already starting to creak. The next outage isn&#8217;t a matter of &#8220;if,&#8221; it&#8217;s a matter of &#8220;when.&#8221; And when it happens, it won&#8217;t be a simple fix. It will be a deep, structural failure in the very abstraction we built to save us. <\/p>\n<p>Watch the logs. If you see <code>level=error msg=\"Handler for POST \/v1.43\/containers\/create failed\"<\/code>, don&#8217;t bother debugging. Just wipe the node and start the <code>docker install<\/code> again. It\u2019s the only way to be sure the sludge is gone. For a few hours, anyway.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Related_Articles\"><\/span>Related Articles<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Explore more insights and best practices:<\/p>\n<ul>\n<li><a href=\"https:\/\/itsupportwale.com\/blog\/10-essential-javascript-best-practices-for-cleaner-code\/\">10 Essential Javascript Best Practices For Cleaner Code<\/a><\/li>\n<li><a href=\"https:\/\/itsupportwale.com\/blog\/10-react-best-practices-for-clean-and-scalable-code\/\">10 React Best Practices For Clean And Scalable Code<\/a><\/li>\n<li><a href=\"https:\/\/itsupportwale.com\/blog\/how-to-install-mysql-8-on-ubuntu-18-04\/\">How To Install Mysql 8 On Ubuntu 18 04<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>It is 3:14 AM. The PagerDuty alert didn\u2019t just wake me up; it vibrated my soul out of my body. The alert says service-auth-gateway is throwing 500s. I check the logs. It\u2019s a library mismatch. Again. Some junior developer\u2014let\u2019s call him Kyle\u2014pushed a &#8220;hotfix&#8221; that relied on a specific version of libssl that exists only &#8230; <a title=\"Docker Install: A Complete Step-by-Step Setup Guide\" class=\"read-more\" href=\"https:\/\/itsupportwale.com\/blog\/docker-install-a-complete-step-by-step-setup-guide\/\" aria-label=\"Read more  on Docker Install: A Complete Step-by-Step Setup Guide\">Read more<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4907","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Docker Install: A Complete Step-by-Step Setup Guide - ITSupportWale<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/itsupportwale.com\/blog\/docker-install-a-complete-step-by-step-setup-guide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Docker Install: A Complete Step-by-Step Setup Guide - ITSupportWale\" \/>\n<meta property=\"og:description\" content=\"It is 3:14 AM. 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