From the [0], it appears dnspython is NOT installed properly.

I installed python-dnspython (not sure if its the same as dnspython) and still don't see *dns* or "base" under /lib/python2.7/site-packages/dns/rdtypes/ANY as [0] mentioned.

sh-4.2# pwd

/lib/python2.7/site-packages/dns/rdtypes/ANY

sh-4.2# ls -ail *dns*

ls: cannot access *dns*: No such file or directory

sh-4.2# ls -ail *base*

ls: cannot access *base*: No such file or directory

sh-4.2# ls -ail __init*

540159 -rw-r--r--. 1 root root 1169 Jun 13  2015 __init__.py

540248 -rw-r--r--. 2 root root  602 Aug  3  2017 __init__.pyc

540248 -rw-r--r--. 2 root root  602 Aug  3  2017 __init__.pyo

sh-4.2# yum list | grep dnspython

python-dnspython.noarch               1:1.10.0-1                  @ORB-extras   

sfdc-python27-dnspython.noarch        1.15.0-2019.10.311854.7.el7 strata_sfdc-python

sfdc-python35-dnspython.noarch        1.15.0-2019.04.081624.7.el7 strata_sfdc-python

sfdc-python36-dnspython.noarch        1.15.0-2021.05.122008.34.el7

sh-4.2# yum list installed | grep dnspython

python-dnspython.noarch           1:1.10.0-1               @ORB-extras          

sh-4.2# 

On Thu, Jun 17, 2021 at 12:19 PM Clark Boylan <cboylan@sapwetik.org> wrote:

On Thu, Jun 17, 2021, at 11:58 AM, Pete Zhang wrote:
> Clark,
>
> I  adjusted the version of greenlet/eventlet as required by other
> modules. here is the output:
>
> ImportError: No module named dnskeybase
>
> sh-4.2# yum list installed | grep "greenlet\|eventlet\|gevent"
>
> python2-eventlet.noarch           0.25.1-1.el7             @local_openstack-tnrp
>
> python2-gevent.x86_64             1.1.2-2.el7              @local_openstack-tnrp
>
> python2-greenlet.x86_64           0.4.12-1.el7             @local_openstack-tnrp
>
> sh-4.2# python2
>
> Python 2.7.5 (default, Oct 30 2018, 23:45:53)
>
> [GCC 4.8.5 20150623 (Red Hat 4.8.5-36)] on linux2
>
> Type "help", "copyright", "credits" or "license" for more information.
>
> >>> from eventlet import greenpool
>
> Traceback (most recent call last):
>
>   File "<stdin>", line 1, in <module>
>
>   File "/usr/lib/python2.7/site-packages/eventlet/__init__.py", line
> 10, in <module>
>
>     from eventlet import convenience
>
>   File "/usr/lib/python2.7/site-packages/eventlet/convenience.py", line
> 7, in <module>
>
>     from eventlet.green import socket
>
>   File "/usr/lib/python2.7/site-packages/eventlet/green/socket.py",
> line 21, in <module>
>
>     from eventlet.support import greendns
>
>   File "/usr/lib/python2.7/site-packages/eventlet/support/greendns.py",
> line 67, in <module>
>
>     setattr(dns.rdtypes, pkg, import_patched('dns.rdtypes.' + pkg))
>
>   File "/usr/lib/python2.7/site-packages/eventlet/support/greendns.py",
> line 59, in import_patched
>
>     return patcher.import_patched(module_name, **modules)
>
>   File "/usr/lib/python2.7/site-packages/eventlet/patcher.py", line
> 126, in import_patched
>
>     *additional_modules + tuple(kw_additional_modules.items()))
>
>   File "/usr/lib/python2.7/site-packages/eventlet/patcher.py", line
> 100, in inject
>
>     module = __import__(module_name, {}, {}, module_name.split('.')[:-1])
>
> ImportError: No module named dnskeybase
>
> >>>

The internet indicates [0] this is a problem with your dnspython installation. That post uses pip, but you are using distro packages so you may need to map things a bit to do further debugging. Hopefully, that helps get things sorted though.

[0] https://stackoverflow.com/questions/55152733/eventlet-importerror-no-module-named-dnskeybase

>
>
> On Thu, Jun 17, 2021 at 10:44 AM Clark Boylan <cboylan@sapwetik.org> wrote:
> > On Thu, Jun 17, 2021, at 10:03 AM, Pete Zhang wrote:
> > > Not sure if my previous email went through or not. Just resend it.
> > >
> > > We hit this error during "glance-manage db_sync":
> > > *ImportError: cannot import name greenpool.*
> > > Any idea what the root cause is and how to fix it?
> > > We have the following rpms installed (thought related).
> > >
> > > `python2-greenlet-0.4.9-1.el7.x86_64.rpm`
> > > `python2-eventlet-0.18.4-2.el7.noarch.rpm`
> > > `python2-gevent-1.1.2-2.el7.x86_64.rpm`
> > >
> > >
> >
> > snip
> >
> > > Notice: /Stage[main]/Neutron::Db::Sync/Exec[neutron-db-sync]/returns:   
> > >   from eventlet import greenpool
> > >
> > > Notice: /Stage[main]/Neutron::Db::Sync/Exec[neutron-db-sync]/returns:
> > > ImportError: cannot import name greenpool
> >
> > I'm not familiar with the CentOS7 packaging, but as a sanity check I ran `pip install greenlet==0.4.9 eventlet==0.18.4` in a python2 virtualenv then in a python2 interpreter `from eventlet import greenpool` runs successfully. I would try running this import by hand on your system to see if you can get any more information. Could be a packaging issue or potentially some sort of name collision between script names?
> >
> > Clark

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