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add arch linux instructions to stupid_kvm_tricks

This commit is contained in:
Trent Palmer 2018-02-13 04:50:57 -08:00
parent 1721d26e54
commit 27a11c0656
5 changed files with 122 additions and 21 deletions
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49
docs/stupid_kvm_tricks.md
View File

@ -22,7 +22,55 @@ virt-install \
--location ./ubuntu-16.04.3-server-amd64.iso \
--extra-args 'console=ttyS0,115200n8 serial'
```
## virt-install Arch Linux
The `--extra-args` option lets you use a serial console. But the
`--extra-args` option only works if you also use an `--location`
option. But the `--location` option can only be used with certain isos.
So use `--cdrom` instead of `--location`, drop the `--extra-args`,
and instruct the kernel to boot with a serial console with a parameter
at the boot splash screen.
```bash
qemu-img create -f qcow2 /var/lib/libvirt/images/arch.qcow2 20G
virt-install --name arch --ram 4096 \
--disk path=/var/lib/libvirt/images/arch.qcow2,size=20 \
--vcpus 2 \
--os-type linux \
--os-variant ubuntu16.04 \
--network bridge=virbr0 \
--graphics none \
--console pty,target_type=serial \
--cdrom /var/lib/libvirt/images/archlinux-2018.02.01-x86_64.iso
```
the arch boot splash screen will appear in your terminal and you can
tap the "tab" key to edit boot parameters
add "console=ttyS0" to kernel command line parameters
before
```bash
> .linux boot/x86_64/vmlinuz archisobasedir=arch archisolabel=ARCH_201802 initrd=boot/intel_ucode.img,boot/x86_64/archiso.img
```
after
```bash
> .linux boot/x86_64/vmlinuz archisobasedir=arch archisolabel=ARCH_201802 initrd=boot/intel_ucode.img,boot/x86_64/archiso.img console=ttyS0
```
```bash
arch boots ...
...
...
...
root@archiso ~ # lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop0 7:0 0 432M 1 loop /run/archiso/sfs/airootfs
sr0 11:0 1 539M 0 rom /run/archiso/bootmnt
vda 254:0 0 20G 0 disk
root@archiso ~ #
```
## Change the Network Interface
br0 gets addresses from the network router, but what if you want
your vm to have be on the virbr0 192.168.122.0/24 subnet?
@ -177,3 +225,4 @@ Delete snapshot
```bash
virsh snapshot-delete --domain dcing --snapshotname dcing-snap0
```

2
site/index.html
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@ -261,5 +261,5 @@
<!--
MkDocs version : 0.17.2
Build Date UTC : 2018-02-11 16:32:53
Build Date UTC : 2018-02-13 12:50:47
-->

7
site/search/search_index.json
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38
site/sitemap.xml
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@ -4,7 +4,7 @@
<url>
<loc>/</loc>
<lastmod>2018-02-11</lastmod>
<lastmod>2018-02-13</lastmod>
<changefreq>daily</changefreq>
</url>
@ -12,7 +12,7 @@
<url>
<loc>/apt_pinning_artful_aardvark_packages_in_xenial_xerus/</loc>
<lastmod>2018-02-11</lastmod>
<lastmod>2018-02-13</lastmod>
<changefreq>daily</changefreq>
</url>
@ -20,7 +20,7 @@
<url>
<loc>/lxd_container_home_server_networking_for_dummies/</loc>
<lastmod>2018-02-11</lastmod>
<lastmod>2018-02-13</lastmod>
<changefreq>daily</changefreq>
</url>
@ -28,7 +28,7 @@
<url>
<loc>/lxd_container_foo/</loc>
<lastmod>2018-02-11</lastmod>
<lastmod>2018-02-13</lastmod>
<changefreq>daily</changefreq>
</url>
@ -36,7 +36,7 @@
<url>
<loc>/how_to_reassign_a_static_ip_address_with_dnsmasq/</loc>
<lastmod>2018-02-11</lastmod>
<lastmod>2018-02-13</lastmod>
<changefreq>daily</changefreq>
</url>
@ -44,7 +44,7 @@
<url>
<loc>/serve_and_share_apps_from_your_phone_with_fdroid/</loc>
<lastmod>2018-02-11</lastmod>
<lastmod>2018-02-13</lastmod>
<changefreq>daily</changefreq>
</url>
@ -52,7 +52,7 @@
<url>
<loc>/nspawn/</loc>
<lastmod>2018-02-11</lastmod>
<lastmod>2018-02-13</lastmod>
<changefreq>daily</changefreq>
</url>
@ -60,7 +60,7 @@
<url>
<loc>/gentoo_lxd_container/</loc>
<lastmod>2018-02-11</lastmod>
<lastmod>2018-02-13</lastmod>
<changefreq>daily</changefreq>
</url>
@ -68,7 +68,7 @@
<url>
<loc>/mastodon_on_arch/</loc>
<lastmod>2018-02-11</lastmod>
<lastmod>2018-02-13</lastmod>
<changefreq>daily</changefreq>
</url>
@ -76,7 +76,7 @@
<url>
<loc>/debian_nspawn_container_on_arch_for_testing_apache_configurations/</loc>
<lastmod>2018-02-11</lastmod>
<lastmod>2018-02-13</lastmod>
<changefreq>daily</changefreq>
</url>
@ -84,7 +84,7 @@
<url>
<loc>/dynamic_cacheing_nginx_reverse_proxy_for_pacman/</loc>
<lastmod>2018-02-11</lastmod>
<lastmod>2018-02-13</lastmod>
<changefreq>daily</changefreq>
</url>
@ -92,7 +92,7 @@
<url>
<loc>/freebsd_jails_on_freenas/</loc>
<lastmod>2018-02-11</lastmod>
<lastmod>2018-02-13</lastmod>
<changefreq>daily</changefreq>
</url>
@ -100,7 +100,7 @@
<url>
<loc>/arch_redis_nspawn/</loc>
<lastmod>2018-02-11</lastmod>
<lastmod>2018-02-13</lastmod>
<changefreq>daily</changefreq>
</url>
@ -108,7 +108,7 @@
<url>
<loc>/arch_postgresql_nspawn/</loc>
<lastmod>2018-02-11</lastmod>
<lastmod>2018-02-13</lastmod>
<changefreq>daily</changefreq>
</url>
@ -116,7 +116,7 @@
<url>
<loc>/misc_tips_troubleshooting/</loc>
<lastmod>2018-02-11</lastmod>
<lastmod>2018-02-13</lastmod>
<changefreq>daily</changefreq>
</url>
@ -124,7 +124,7 @@
<url>
<loc>/self_signed_certs/</loc>
<lastmod>2018-02-11</lastmod>
<lastmod>2018-02-13</lastmod>
<changefreq>daily</changefreq>
</url>
@ -132,7 +132,7 @@
<url>
<loc>/selfoss_on_centos7/</loc>
<lastmod>2018-02-11</lastmod>
<lastmod>2018-02-13</lastmod>
<changefreq>daily</changefreq>
</url>
@ -140,7 +140,7 @@
<url>
<loc>/stupid_package_manager_tricks/</loc>
<lastmod>2018-02-11</lastmod>
<lastmod>2018-02-13</lastmod>
<changefreq>daily</changefreq>
</url>
@ -148,7 +148,7 @@
<url>
<loc>/stupid_kvm_tricks/</loc>
<lastmod>2018-02-11</lastmod>
<lastmod>2018-02-13</lastmod>
<changefreq>daily</changefreq>
</url>

47
site/stupid_kvm_tricks/index.html
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@ -148,6 +148,8 @@
<li><a class="toctree-l3" href="#virt-install-ubuntu1604">virt-install ubuntu16.04</a></li>
<li><a class="toctree-l3" href="#virt-install-arch-linux">virt-install Arch Linux</a></li>
<li><a class="toctree-l3" href="#change-the-network-interface">Change the Network Interface</a></li>
<li><a class="toctree-l3" href="#clone-the-vm">Clone the VM</a></li>
@ -219,6 +221,51 @@
--extra-args 'console=ttyS0,115200n8 serial'
</code></pre>
<h2 id="virt-install-arch-linux">virt-install Arch Linux</h2>
<p>The <code>--extra-args</code> option lets you use a serial console. But the
<code>--extra-args</code> option only works if you also use an <code>--location</code>
option. But the <code>--location</code> option can only be used with certain isos.
So use <code>--cdrom</code> instead of <code>--location</code>, drop the <code>--extra-args</code>,
and instruct the kernel to boot with a serial console with a parameter
at the boot splash screen.</p>
<pre><code class="bash">qemu-img create -f qcow2 /var/lib/libvirt/images/arch.qcow2 20G
virt-install --name arch --ram 4096 \
--disk path=/var/lib/libvirt/images/arch.qcow2,size=20 \
--vcpus 2 \
--os-type linux \
--os-variant ubuntu16.04 \
--network bridge=virbr0 \
--graphics none \
--console pty,target_type=serial \
--cdrom /var/lib/libvirt/images/archlinux-2018.02.01-x86_64.iso
</code></pre>
<p>the arch boot splash screen will appear in your terminal and you can
tap the "tab" key to edit boot parameters</p>
<p>add "console=ttyS0" to kernel command line parameters</p>
<p>before</p>
<pre><code class="bash">&gt; .linux boot/x86_64/vmlinuz archisobasedir=arch archisolabel=ARCH_201802 initrd=boot/intel_ucode.img,boot/x86_64/archiso.img
</code></pre>
<p>after</p>
<pre><code class="bash">&gt; .linux boot/x86_64/vmlinuz archisobasedir=arch archisolabel=ARCH_201802 initrd=boot/intel_ucode.img,boot/x86_64/archiso.img console=ttyS0
</code></pre>
<pre><code class="bash">
arch boots ...
...
...
...
root@archiso ~ # lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
loop0 7:0 0 432M 1 loop /run/archiso/sfs/airootfs
sr0 11:0 1 539M 0 rom /run/archiso/bootmnt
vda 254:0 0 20G 0 disk
root@archiso ~ #
</code></pre>
<h2 id="change-the-network-interface">Change the Network Interface</h2>
<p>br0 gets addresses from the network router, but what if you want
your vm to have be on the virbr0 192.168.122.0/24 subnet?</p>