Cannot install cloudstack-marvin 4.15.0.0 on Ubuntu 20.04

[weizhouapache]

see output below

root@mgt2004:~# apt install cloudstack-marvin
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
 cloudstack-marvin : Depends: python-pip but it is not installable
E: Unable to correct problems, you have held broken packages.

it is because that there is no python2 pip on ubuntu 20.04 any more.
hence marvin cannot be installed, and integration test cannot be handled.

ISSUE TYPE

• Bug Report

COMPONENT NAME

Marvin

CLOUDSTACK VERSION

CONFIGURATION

OS / ENVIRONMENT

Ubuntu 20.04

SUMMARY

STEPS TO REPRODUCE

EXPECTED RESULTS

ACTUAL RESULTS

[DaanHoogland]

@weizhouapache marvin 4.14 can be installed?

[weizhouapache]

marvin 4.14 can be installed?

@DaanHoogland nee, but I think we do not support ubuntu 20.04 in 4.14 so it is not an issue

[DaanHoogland]

marvin 4.14 can be installed?

@DaanHoogland nee, but I think we do not support ubuntu 20.04 in 4.14 so it is not an issue

right, but marvin on a operator machine could have been on 20.04 , right independent of the ACS install.

probably irrelevant, I think python2.7 end of live is likely to be the root cause here?!?
I encountered some instructions to start using python -m pip instead of straight pip to smoothen transition.
I'll install a ubuntu 20 to do some tinkering.

[weizhouapache]

marvin 4.14 can be installed?

@DaanHoogland nee, but I think we do not support ubuntu 20.04 in 4.14 so it is not an issue

right, but marvin on a operator machine could have been on 20.04 , right independent of the ACS install.

probably irrelevant, I think python2.7 end of live is likely to be the root cause here?!?

@DaanHoogland yes exactly.

I encountered some instructions to start using python -m pip instead of straight pip to smoothen transition.
I'll install a ubuntu 20 to do some tinkering.
python/pip is replaced with python3/pip3 in ubuntu 20.04, issues in installation can be fixed by changes in debian/control and debian/cloudstack-marvin.postinst.

however, even if cloudstack-marvin is installed, there is still no way to use marvin to deploy zones or run nosetests, as our marvin python files support only python2 but there is no pip for python2 on ubuntu 20.04 .

in short, we need to change marvin to support python3.

[DaanHoogland]

right, I am doing that , but in combination with nose to nose2 upgrade in a poc. I'll give a seperation of the efforts a go. (#4479)

[DaanHoogland]

btw @weizhouapache I think we can call this a major but not a critical, do you agree?

[weizhouapache]

btw @weizhouapache I think we can call this a major but not a critical, do you agree?

@DaanHoogland yes, at least users should be able to install cloudstack-marvin on ubuntu 20.04

[rohityadavcloud]

I think most users don't install marvin, this is only for test env to make it easier for a CI such as Trilian to do branch-based tests+marvin. As this is not a critical/blocker issue, let's handle this in 4.15.1.0 or master+.