Notes from the book Docker deep dive by Nigel Poulton on Nerdsid.comhttps://nerdsid.com/notes/docker-deep-dive/Recent content in Notes from the book Docker deep dive by Nigel Poulton on Nerdsid.comHugoen-usMon, 06 Apr 2026 09:58:26 +0000Brief history of Dockerhttps://nerdsid.com/notes/docker-deep-dive/history/Fri, 03 Apr 2026 07:32:28 +0530https://nerdsid.com/notes/docker-deep-dive/history/<h2 id="the-pre-docker-era">The pre Docker era</h2> <h3 id="pre-vm-era">Pre VM era</h3> <p>Businesses bought overpowered servers which operated at 5-10% of their capacity. No one wanted unhappy customers &amp; lost revenue.</p> <p>Summary: high capex, low operational efficiency.</p> <h3 id="the-vm-era">The VM era</h3> <p>VMWare, Inc created Virtual machine (VM). This allowed to run multiple applications on a server thereby increasing operational efficiency of servers</p> <p>Issues with VMs:</p> <ul> <li>Slow to boot</li> <li>Not portable</li> <li>Every VM needs OS patching</li> <li>Needs monitoring</li> </ul> <p>What do we mean by not portable:</p>