[node-devel] Versioning of oVirt Node

[Fabian Deutsch]

Hey,

currently [0] - or since the split into base image and layered image -
the versioning of Node hasn't been really resolved.

I'd like to change the versioning of Node with the goal to make it
directly obvious what oVirt version a Node is targeting.

Before I continue let me clarify that this is primarily about the
versioning of the Node ISO.
The versioning of the wrapper-rpm can possibly follow the naming of the
ISO, as long as we make yum happy.
Also this is not about the ovirt-node (pkg) versioning, only about the
iso image.

Currently the ISO naming is as follows:

  ovirt-node-iso-<node-version>-<number>.<number>.<build-date>.\
  vdsm<ovirt-target-version>.<dist>.iso

(i.e. ovirt-node-iso-3.0.4-1.0.201401291204.vdsm34.el6.iso)

The main pain point of this is IMO the vdsm34 snippet - because it
breaks the whol envr and is currently just added after the edit-node
pass.

I'm proposing the following scheme:

  ovirt-node-iso-<ovirt-target-version>-<build-date>.<number>.<dist>.iso

(i.e. ovirt-node-iso-3.4.0-20140328.1.el6.iso)

This should make it obvious to the user what ISO to use.


Now about the rpm scheme. We can not change this as long as the Engine
logic has not been updated to use the proposed metadata file:
https://bugzilla.redhat.com/show_bug.cgi?id=1081969 (Node)
https://bugzilla.redhat.com/show_bug.cgi?id=1081970

Once these two bugs have been addressed we can also change the rpm
naming.
In general I'd like to follow the iso naming, thus:

ovirt-node-iso-<ovirt-target-version>-<build-date>.<number>.<dist>.rpm

(i.e. ovirt-node-iso-3.4.0-20140328.1.el6.rpm)

A couple of examples:
# Newer build, same day
$ rpmdev-vercmp 0:3.4.0-20140328.1 0:3.4.0-20140328.2
0:3.4.0-20140328.1 < 0:3.4.0-20140328.2

# Same build
$ rpmdev-vercmp 0:3.4.0-20140328.1 0:3.4.0-20140328.1
0:3.4.0-20140328.1 == 0:3.4.0-20140328.1

# Older and newer build, same day
$ rpmdev-vercmp 0:3.4.0-20140328.1 0:3.4.0-20140328.0
0:3.4.0-20140328.1 > 0:3.4.0-20140328.0

# Same ver, one year later
$ rpmdev-vercmp 0:3.4.0-20140328.1 0:3.4.0-20150328.1
0:3.4.0-20140328.1 < 0:3.4.0-20150328.1

# New ver
$ rpmdev-vercmp 0:3.4.0-20140328.1 0:3.5.0-20140328.1
0:3.4.0-20140328.1 < 0:3.5.0-20140328.1

# Older ver, newer build date
$ rpmdev-vercmp 0:3.4.0-20140328.1 0:3.3.0-20150328.1
0:3.4.0-20140328.1 > 0:3.3.0-20150328.1
(Would not get installed by yum automatically)

In general the names of the iso and rpm should not be relevant for
Engine to decide about updates. The metadata file of the rpm will be
used for that.

Finally, are there objections to of changing the ISO versioning scheme
now? Or does someone see problems with it?

Greetings
fabian

---
[0] http://plain.resources.ovirt.org/releases/3.4/iso/
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