yahoo-eng-team team mailing list archive

[Thiago Martins <thiagocmartinsc@xxxxxxxxx>]

Public bug reported:

Hello!

 In my OpenStack environment, everything works great! Including Cloud-
Init.

 However, I can not use virtio-blk anymore (i.e., /dev/vdX devices),
because it is too slow.

 I changed to virtio-scsi (i.e., /dev/sdX devices) and the IOPS is more
than double!

 But, after this change in Glance images, Cloud-Init is failing to make
the SWAP and to mount the Ephemeral volumes.


 * Here is a normal log (with virtio-blk):

 http://paste.ubuntu.com/25127354/


 So, after changing my Ubuntu image properties on Glance, like this:

 glance image-update --property hw_scsi_model=virtio-scsi --property
hw_disk_bus=scsi $UBUNTU_IMAGE_ID


 Cloud Init is now failing to make the SWAP, also Ephemeral is not mounted!


 * Here is the error log (with virtio-scsi):

 http://paste.ubuntu.com/25127989/


 Image used in Glance:

 http://uec-images.ubuntu.com/releases/16.04/release/ubuntu-16.04
-server-cloudimg-amd64-disk1.img


 If I bring back virtio-blk, cloud-init works again (same Image, same Flavor).

 But, I can't use virtio-blk because it is very slow in my system! The
virtio-scsi rocks!


Cheers!
Thiago

** Affects: cloud-init
     Importance: Undecided
         Status: New

-- 
You received this bug notification because you are a member of Yahoo!
Engineering Team, which is subscribed to cloud-init.
https://bugs.launchpad.net/bugs/1705346

Title:
  Cloud-Init fails to deal with SWAP and Ephemeral if virtio-scsi is
  enabled

Status in cloud-init:
  New

Bug description:
  Hello!

   In my OpenStack environment, everything works great! Including Cloud-
  Init.

   However, I can not use virtio-blk anymore (i.e., /dev/vdX devices),
  because it is too slow.

   I changed to virtio-scsi (i.e., /dev/sdX devices) and the IOPS is
  more than double!

   But, after this change in Glance images, Cloud-Init is failing to
  make the SWAP and to mount the Ephemeral volumes.

  
   * Here is a normal log (with virtio-blk):

   http://paste.ubuntu.com/25127354/

  
   So, after changing my Ubuntu image properties on Glance, like this:

   glance image-update --property hw_scsi_model=virtio-scsi --property
  hw_disk_bus=scsi $UBUNTU_IMAGE_ID

  
   Cloud Init is now failing to make the SWAP, also Ephemeral is not mounted!

  
   * Here is the error log (with virtio-scsi):

   http://paste.ubuntu.com/25127989/

  
   Image used in Glance:

   http://uec-images.ubuntu.com/releases/16.04/release/ubuntu-16.04
  -server-cloudimg-amd64-disk1.img

  
   If I bring back virtio-blk, cloud-init works again (same Image, same Flavor).

   But, I can't use virtio-blk because it is very slow in my system! The
  virtio-scsi rocks!

  
  Cheers!
  Thiago

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