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Provision KVM VM without DHCP » History » Version 5

Leos Stejskal, 10/15/2021 11:38 AM

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h1. Provision KVM VM without DHCP
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This method is similar to the [[gPXE]] provisioning method, but the parameters are passed as kernel boot options.
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h2. Prerequisites
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In order to use direct kernel booting, the *vmlinuz* and *initrd.img* files need to exist in a storage pool.
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I downloaded the two available for CentOS 6.0.
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<pre>
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cd /var/lib/libvirt/images
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wget http://mirror.centos.org/centos/6/os/x86_64/isolinux/vmlinuz
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wget http://mirror.centos.org/centos/6/os/x86_64/isolinux/initrd.img
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</pre>
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h2. Using virt-manager
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From within the virtual machine's details, select the *Boot Options*.  Expand *Direct kernel boot* and enter the following information.  Replace the IP addresses with those specific to your setup
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*Kernel path*: /var/lib/libvirt/images/vmlinuz
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*Initrd path*: /var/lib/libvirt/images/initrd.img
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*Kernel arguments*: ks=http://foremanserver.tld/unattended/provision?static=yes ksdevice=bootif network kssendmac ip=192.168.1.2 netmask=255.255.255.0 gateway=192.168.1.1 dns=192.168.1.1
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h2. command line using virsh
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To make these changes edit the virtual machine's XML file through virsh
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<pre>
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virsh edit domain
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</pre>
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Below are the relevant lines, replace the IPs with those of your setup
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<pre><code>
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  <os>
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    <type arch='x86_64' machine='rhel6.0.0'>hvm</type>
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    <kernel>/var/lib/libvirt/images/vmlinuz</kernel>
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    <initrd>/var/lib/libvirt/images/initrd.img</initrd>
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    <cmdline>ks=http://foremanserver.tld/unattended/provision?static=yes ksdevice=bootif network kssendmac ip=192.168.1.2 netmask=255.255.255.0 gateway=192.168.1.1 dns=192.168.1.1</cmdline>
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    <boot dev='hd'/>
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  </os></code>
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</pre>