http://blog.romheat.net/tags/kvm/Recent content in Kvm on cseguraHugoen-usTue, 07 Nov 2023 04:12:07 +0100http://blog.romheat.net/posts/2023/23_11_07_kvm/Tue, 07 Nov 2023 04:12:07 +0100http://blog.romheat.net/posts/2023/23_11_07_kvm/<h1 id="kvm-notes">KVM notes</h1> <p>Check if the CPU supports virtualization:</p> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>egrep -c <span style="color:#e6db74">&#39;(vmx|svm)&#39;</span> /proc/cpuinfo </span></span><span style="display:flex;"><span>lscpu | grep Virtualization </span></span></code></pre></div><ul> <li>Install KVM</li> </ul> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>sudo apt install qemu-kvm qemu-utils libvirt-daemon-system libvirt-clients virtinst virt-manager </span></span></code></pre></div><ul> <li>Check Virtualization</li> </ul> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>systemctl status libvirtd </span></span><span style="display:flex;"><span>systemctl --now enable libvirtd </span></span></code></pre></div><ul> <li>Check qemu and virsh:</li> </ul> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>kvm --version </span></span><span style="display:flex;"><span>virsh --version </span></span></code></pre></div><ul> <li>Components that can be used</li> </ul> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>sudo virt-host-validate </span></span></code></pre></div><ul> <li>Check IOMMU</li> </ul> <div class="highlight"><pre tabindex="0" style="color:#f8f8f2;background-color:#272822;-moz-tab-size:4;-o-tab-size:4;tab-size:4;"><code class="language-bash" data-lang="bash"><span style="display:flex;"><span>dmesg | grep -e DMAR -e IOMMU </span></span></code></pre></div><ul> <li>Edit /etc/default/grub if WARN (IOMMU not enabled)</li> </ul> <p><code>GRUB_CMDLINE_LINUX=&quot;intel_iommu=on&quot;</code> add this line to /etc/default/grub and <code>sudo update-grub</code></p>