Fail to run "viocli prepare datastore" with an error "TypeError: has_snapshot() takes exactly 2 arguments (1 given))

Products

• VMware
• VMware Integrated OpenStack

Issue/Introduction

Symptoms:
In trying to run "viocli prepare datastore", you can see similar outputs to:

# viocli prepare datastore dc-name ds-name -v
2020/08/04 09:39:38 failed executing the command with error command terminated with exit code 1: Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/usr/lib/python2.7/site-packages/viocli/bundle/dsmigrateprep.py", line 181, in ds_migrate_prep
if has_snapshot(uuid):
TypeError: has_snapshot() takes exactly 2 arguments (1 given)

Environment

VMware Integrated OpenStack 6.x

Cause

This issue is caused because an argument of "has_snapshot()" function in dsmigrateprep.py is one.

Resolution

This is a known issue in VMware Integrated OpenStack 6.x. It is resolved in VMware Integrated OpenStack 7.0 and newer.

Workaround:
1. login to vioshim pod by running: "osctl exec -it <vioshim-pod-name>  bash
2. change /usr/lib/python2.7/site-packages/viocli/bundle/dsmigrateprep.py", line 181 to:
        if has_snapshot(uuid, os_config.cs):
3. add these 2 lines after line#141:
    os_config = OSConfiguration()
    os_config.authenticate(DEFAULT_OS_VOLUME_API_VERSION)
4. try ds prepare cmd again.