(In reply to comment #0)
> rhev-hypervisor-NVR.iso

it will be rhevh-VR.iso
where VR includes compose timestamp e.g. rhevh-6.2-20110921.1
This is already used in compose and needs to be short to fit cdlabel limit.

installing with rhevh-VR.iso is easy as is a symlink called rhev-hypervisor.iso.  The tricky thing is the multiple installs.  AFAICT, this is done in the kernel using the installonlypkgs option.  This list is defaulted in the (yum) code to include various kernel packages.  

The setting can also be set in /etc/yum.conf, but this overrides the setting in the code, so it would require that we set the installonlypkgs entry to the full list of packages in the yum source code and then include rhev-h.  

There may be other ways to do this that I haven't found yet, but I'm not sure that it's possible at this point without either changing yum source code or the yum.conf file neither of which is desirable.

After discussions on IRC, we'll make rhev-hypervisor installable side-by-side, but won't do any yum configuration to allow multiple installs.  Instead, we'll add it to the documentation for how to configure yum to allow multiple side-by-side installs

    Technical note added. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    New Contents:
In order to allow side-by-side installs of rhev-hypervisor, you need to configure yum to make rhev-hypervisor an installonly package.  This is done by editing yum.conf and adding the installonlypkgs option.

[main]
...
installonlypkgs=rhev-hypervisor

This option needs to also include the default list of installonly packages which can be found by running man yum.conf and looking at the installonlypkgs option.

Created attachment 525236 [details]
Patch

Draft 1 of the patch:

Add rhev-hypervisor-tools package which contains rhevh-* scripts
rhev-hypervisor and rhev-hypervisor-tools both have requires >= the other (this allows old rhev-hypervisor to be installed while keeping latest -tools.  

Testing process:

touch a file that matches Source1 (in my case since i was building on Fedora: rhev-hypervisor-6.2-0.17.2.fc16.iso)

build the rpms:
rpmbuild --nodeps --define "_sourcedir $PWD" --define "extra_release .mike$(date +%s)" --define "_specdir $PWD" -ba --clean rhev-hypervisor.spec

Setup repo with the rpms

edited /usr/lib/python2.7/site-packages/yum/config.py to allow rhev-hypervisor to be installed multiple times (search installonly and add it to the list)


install rhev-hypervisor
pulled both rhev-hypervisor and rhev-hypervisor tools

$ ls -l /usr/share/rhev-hypervisor/ 
total 16
-rw-r--r--. 1 root root  0 Sep 27 19:35 rhevh-6.2-0.17.2.fc16.mike1317169841.iso
lrwxrwxrwx. 1 root root 67 Sep 27 20:31 rhevh-latest.iso -> /usr/share/rhev-hypervisor/rhevh-6.2-0.17.2.fc16.mike1317169841.iso
lrwxrwxrwx. 1 root root 67 Sep 27 20:31 rhev-hypervisor.iso -> /usr/share/rhev-hypervisor/rhevh-6.2-0.17.2.fc16.mike1317169841.iso
-rw-r--r--. 1 root root 31 Sep 27 20:30 version-6.2-0.17.2.fc16.mike1317169841.txt
lrwxrwxrwx. 1 root root 69 Sep 27 20:31 version.txt -> /usr/share/rhev-hypervisor/version-6.2-0.17.2.fc16.mike1317169841.txt


build new rpms

yum update rhev-hypervisor (need to clean yum cache first)


$ ls -l /usr/share/rhev-hypervisor/ 
total 20
-rw-r--r--. 1 root root  0 Sep 27 19:35 rhevh-6.2-0.17.2.fc16.mike1317169841.iso
-rw-r--r--. 1 root root  0 Sep 27 19:35 rhevh-6.2-0.17.2.fc16.mike1317169913.iso
lrwxrwxrwx. 1 root root 67 Sep 27 20:32 rhevh-latest.iso -> /usr/share/rhev-hypervisor/rhevh-6.2-0.17.2.fc16.mike1317169913.iso
lrwxrwxrwx. 1 root root 67 Sep 27 20:32 rhev-hypervisor.iso -> /usr/share/rhev-hypervisor/rhevh-6.2-0.17.2.fc16.mike1317169913.iso
-rw-r--r--. 1 root root 31 Sep 27 20:30 version-6.2-0.17.2.fc16.mike1317169841.txt
-rw-r--r--. 1 root root 31 Sep 27 20:31 version-6.2-0.17.2.fc16.mike1317169913.txt
lrwxrwxrwx. 1 root root 69 Sep 27 20:32 version.txt -> /usr/share/rhev-hypervisor/version-6.2-0.17.2.fc16.mike1317169913.txt


known issues:

if you install an old version, it will update links to point to the old version, thus mixing up -latest terminology.

uninstall doesn't cleanup symlinks

This will cleanup sym links when the last version is uninstalled.  Still no handling of installing an old version or uninstalling the most recent version.

--- a/rhev-hypervisor.spec
+++ b/rhev-hypervisor.spec
@@ -83,11 +83,19 @@ ln -snf %{app_root}/%{product_code}-%{version}-%{release}.iso %{app_root}/%{prod
 ln -snf %{app_root}/%{product_code}-%{version}-%{release}.iso %{app_root}/%{name}.iso
 ln -snf %{app_root}/version-%{version}-%{release}.txt %{app_root}/version.txt

+%preun
+if [ $1 = 0 ]; then
+    rm %{app_root}/%{product_code}-latest.iso
+    rm %{app_root}/%{name}.iso
+    rm %{app_root}/version.txt
+fi
+
 %clean
 %{__rm} -rf %{buildroot}

 %files
 %defattr(0644,root,root,0755)
+%{app_root}
 %{app_root}/%{product_code}-%{version}-%{release}.iso
 %{app_root}/version-%{version}-%{release}.txt

Actually, removing the newest version ends up recusively removing all rhev-hypervisor packages due to the rhev-hypervisor/rhev-hypervisor-tools interdependence

I'm thinking that we could change rhev-hypervisor-tools to require rhev-hypervisor being installed, but not a specific version

Ok, I think I've worked out all the various problems, so I'll summarize changes

split into 2 packages -- rhev-hypervisor and rhev-hypervisor-tools

rhev-hypervisor-tools contains the renamed livecd-scripts

Dependency relationship is:

rhev-hypervisor requires -tools >= itself
-tools requires any rhev-hypervisor
rhev-hypervisor conflicts with any rhev-h older than right now (so beta2 and pre-beta2 rpms)

layout of the rhev-hypervisor directory: 

$ ll /usr/share/rhev-hypervisor/
total 32K
drwxr-xr-x.   2 root root 4.0K Sep 28 10:36 ./
drwxr-xr-x. 353 root root  12K Sep 28 10:36 ../
-rw-r--r--.   1 root root    0 Sep 27 20:44 rhevh-6.2-0.17.2.el6.test1317220060.iso
lrwxrwxrwx.   1 root root   66 Sep 28 10:36 rhevh-latest.iso -> /usr/share/rhev-hypervisor/rhevh-6.2-0.17.2.el6.test1317220060.iso
lrwxrwxrwx.   1 root root   66 Sep 28 10:36 rhev-hypervisor.iso -> /usr/share/rhev-hypervisor/rhevh-6.2-0.17.2.el6.test1317220060.iso
-rw-r--r--.   1 root root   30 Sep 28 10:27 version-6.2-0.17.2.el6.test1317220060.txt
lrwxrwxrwx.   1 root root   68 Sep 28 10:36 version.txt -> /usr/share/rhev-hypervisor/version-6.2-0.17.2.el6.test1317220060.txt


I apologize for the ugly version info, but it was necessary for testing purposes.  A real build will have 

rhevh-6.2-20110928.0.el6.iso
version-6.2-20110928.0.el6.txt


-latest will *always* point to latest version, not latest installed.  This includes after installs of old versions and uninstalls of the latest version

uninstall will cleanup everything if it's the last version installed (including the /usr/share/rhev-hypervisor directory if nothing is was placed there manually).

The name should include the version 
eg. rhev-hypervisor-6-latest.iso otherwise we can't have 5 and 6 side by side in the same directory.

(In reply to comment #13)
> The name should include the version 
> eg. rhev-hypervisor-6-latest.iso otherwise we can't have 5 and 6 side by side
> in the same directory.

It definitely won't work with current rhevh 5.7, please clone to 5.8...

Created attachment 525374 [details]
Patch

Takes into account feedback -- currently it does rhevh-latest-6.2.iso, but that can be changed to latest-6.iso if desired.

Created attachment 525585 [details]
Updated patch

moves rhevh-latest-6.2.iso to rhevh-latest-6
changes Conflicts to be <=5.7

Verified on 6.2-20111010, multiple rhevh iso file can be existed:

# ll /usr/share/rhev-hypervisor/ 
total 382992
-rw-r--r-- 1 root root 131072000 Sep 30 07:12 rhevh-6.2-20110929.0.el6.iso
-rw-r--r-- 1 root root 130023424 Oct  6 23:09 rhevh-6.2-20111006.0.el6.iso
-rw-r--r-- 1 root root 131072000 Oct 10 22:06 rhevh-6.2-20111010.0.el6.iso
lrwxrwxrwx 1 root root        55 Oct 11 17:21 rhevh-latest-6.iso -> /usr/share/rhev-hypervisor/rhevh-6.2-20111010.0.el6.iso
lrwxrwxrwx 1 root root        55 Oct 11 17:21 rhev-hypervisor.iso -> /usr/share/rhev-hypervisor/rhevh-6.2-20111010.0.el6.iso
-rw-r--r-- 1 root root        19 Sep 30 07:21 version-6.2-20110929.0.el6.txt
-rw-r--r-- 1 root root        19 Oct  7 00:49 version-6.2-20111006.0.el6.txt
-rw-r--r-- 1 root root        19 Oct 10 22:21 version-6.2-20111010.0.el6.txt
lrwxrwxrwx 1 root root        57 Oct 11 17:21 version.txt -> /usr/share/rhev-hypervisor/version-6.2-20111010.0.el6.txt

    Technical note updated. If any revisions are required, please edit the "Technical Notes" field
    accordingly. All revisions will be proofread by the Engineering Content Services team.
    
    Diffed Contents:
@@ -1,7 +1,9 @@
-In order to allow side-by-side installs of rhev-hypervisor, you need to configure yum to make rhev-hypervisor an installonly package.  This is done by editing yum.conf and adding the installonlypkgs option.
+Previously, you could not run side-by-side installations of Red Hat Enterprise Virtualization Hypervisor. 
 
+Now, you can allow side-by-side installations of the hypervisor by configuring yum to make rhev-hypervisor an install-only package. Edit the yum.conf file and add the installonlypkgs option:
+
 [main]
 ...
 installonlypkgs=rhev-hypervisor
 
-This option needs to also include the default list of installonly packages which can be found by running man yum.conf and looking at the installonlypkgs option.+This option also needs to include the default list of install-only packages, which you can find by running the man yum.conf command and looking at the installonlypkgs option.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2011-1783.html