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Difference between revisions of "Nova/UML"

 
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If you want to play around with Nova in the cloud<<[[FootNote]]("Yo dawg, I heard you like clouds, so I put a cloud in your cloud..")>>, you can use user-mode-linux instead of KVM or Xen. Here's how:
 
If you want to play around with Nova in the cloud<<[[FootNote]]("Yo dawg, I heard you like clouds, so I put a cloud in your cloud..")>>, you can use user-mode-linux instead of KVM or Xen. Here's how:
  
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wget http://nova.openstack.org/~soren/ubuntu-lucid-uml.img.gz
 
wget http://nova.openstack.org/~soren/ubuntu-lucid-uml.img.gz
 
gzip -d ubuntu-lucid-uml.img.gz
 
gzip -d ubuntu-lucid-uml.img.gz
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euca-bundle -i ubuntu-lucid-uml.img
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euca-bundle-image -i ubuntu-lucid-uml.img
 
euca-upload-bundle -b uml-image-bucket -m /tmp/ubuntu-lucid-uml.img.manifest.xml
 
euca-upload-bundle -b uml-image-bucket -m /tmp/ubuntu-lucid-uml.img.manifest.xml
 
euca-register uml-image-bucket/ubuntu-lucid-uml.img.manifest.xml
 
euca-register uml-image-bucket/ubuntu-lucid-uml.img.manifest.xml
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This gives you back an AMI id. Nova doesn't (yet) understand that this is a UML image and thus doesn't need a separate kernel, so when you want to run it, you need to pass a kernel and ramdisk to euca-run-instances.
 
This gives you back an AMI id. Nova doesn't (yet) understand that this is a UML image and thus doesn't need a separate kernel, so when you want to run it, you need to pass a kernel and ramdisk to euca-run-instances.
  
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= XML template =
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= Explaining to nova-compute that you want UML =
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The XML template for UML is different than the one for KVM. Grab it here: http://nova.openstack.org/~soren/uml-template.xml
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Set <code><nowiki> --libvirt_type=uml </nowiki></code> in /etc/nova/nova-compute.conf
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----
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...and tell nova-compute to use this new template instead of the default one using the --libvirt_xml_template option.
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[[Category:Nova]]
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= libvirt URI =
 
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(Note: This functionality has not been merged in yet)
 
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Finally, you need to tell nova-compute to use the UML URI. You do this by passing "--libvirt_uri uml:///system" to it.
 
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That should do the trick.
 

Latest revision as of 23:30, 17 February 2013

If you want to play around with Nova in the cloud<<FootNote("Yo dawg, I heard you like clouds, so I put a cloud in your cloud..")>>, you can use user-mode-linux instead of KVM or Xen. Here's how:

Image

First of all, you need an image that can be run by UML. Grab an Ubuntu Lucid one here: http://nova.openstack.org/~soren/ubuntu-lucid-uml.img.gz

Bundle it up like you usually would: 


wget http://nova.openstack.org/~soren/ubuntu-lucid-uml.img.gz
gzip -d ubuntu-lucid-uml.img.gz
euca-bundle-image -i ubuntu-lucid-uml.img
euca-upload-bundle -b uml-image-bucket -m /tmp/ubuntu-lucid-uml.img.manifest.xml
euca-register uml-image-bucket/ubuntu-lucid-uml.img.manifest.xml


This gives you back an AMI id. Nova doesn't (yet) understand that this is a UML image and thus doesn't need a separate kernel, so when you want to run it, you need to pass a kernel and ramdisk to euca-run-instances.

Explaining to nova-compute that you want UML

Set --libvirt_type=uml in /etc/nova/nova-compute.conf

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