[openstack-dev] [Octavia] Octavia VM image design
johnsomor at gmail.com
Wed Aug 27 22:21:03 UTC 2014
I am investigating building scripts that use diskimage-builder
(https://github.com/openstack/diskimage-builder) to create a "purpose
built" image. This should allow some flexibility in the base image
and the output image format (including a path to docker).
The definition of "purpose built" is open at this point. I will
likely try to have a minimal Ubuntu based VM image as a starting
point/test case and we can add/change as necessary.
On Wed, Aug 27, 2014 at 2:12 PM, Dustin Lundquist <dustin at null-ptr.net> wrote:
> It seems to me there are two major approaches to the Octavia VM design:
> Start with a standard Linux distribution (e.g. Ubuntu 14.04 LTS) and install
> HAProxy 1.5 and Octavia control layer
> Develop a minimal purpose driven distribution (similar to m0n0wall) with
> just HAProxy, iproute2 and a Python runtime for the control layer.
> The primary difference here is additional development effort for option 2,
> verses the increased image size of option 1. Using Ubuntu and CirrOS images
> a representative of the two options it looks like the image size difference
> is on the about 20 times larger for a full featured distribution. If one of
> the HA models is to spin up a replacement instance on failure the image size
> could be significantly affect fail-over time.
> For initial work I think starting with a standard distribution would be
> sensible, but we should target systemd (Debian adopted systemd as new
> default, and Ubuntu is following suit). I wanted to find out if there is
> interest in a minimal Octavia image, and if so this may affect design
> decisions on the instance control plane component.
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