Public bug reported:

I was failed by autopkgtests of freeipa, but not the old "ip route output 
changed" case.

It essentially does this and fails:
$ apt install freeipa-server freeipa-server-dns freeipa-server-trust-ad 
freeipa-common freeipa-client freeipa-admintools freeipa-tests python-ipaclient 
python-ipalib python-ipaserver python-ipatests

Bionic-as-is: installs ok
Bionic-Proposed: installs ok

In LP Infra:
dpkg: error processing package freeipa-client (--configure):
 installed freeipa-client package post-installation script subprocess returned 
error exit status 1

Use Pinning to get the autopkgtest style:
# cat /etc/apt/preferences.d/nssonlyproposed
Package: *
Pin: release a=bionic
Pin-Priority: 1001
Package: libnss3 libnss3-tools libnss3-dev libnss3-dbg
Pin: release a=bionic-proposed
Pin-Priority: 1002
Bionic-nss-only-from-Proposed: TRIGGERS the issue

freeipa-client is in the postinst calling this:
python2 -c 'from ipapython.certdb import update_ipa_nssdb; update_ipa_nssdb()'
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/lib/python2.7/dist-packages/ipapython/", line 64, in 
  File "/usr/lib/python2.7/dist-packages/ipapython/", line 53, in 
  File "/usr/lib/python2.7/dist-packages/ipapython/", line 149, in 
    self.run_certutil(["-N", "-f", password_filename])
  File "/usr/lib/python2.7/dist-packages/ipapython/", line 142, in 
    return, stdin, **kwargs)
  File "/usr/lib/python2.7/dist-packages/ipapython/", line 515, in run
    raise CalledProcessError(p.returncode, arg_string, str(output))
subprocess.CalledProcessError: Command '/usr/bin/certutil -d /etc/ipa/nssdb -N 
-f /etc/ipa/nssdb/pwdfile.txt' returned non-zero exit status 255

That is - if called alone complaining about the passwd:
# /usr/bin/certutil -d /etc/ipa/nssdb -N -f /etc/ipa/nssdb/pwdfile.txt
Invalid password.
certutil: Could not set password for the slot: SEC_ERROR_BAD_PASSWORD: The 
security password entered is incorrect.

Note that there is a related freeipa fix in later versions:
   freeipa (4.6.2-4) unstable; urgency=medium                                   
     * client.postinst: Migrate from old nssdb only if it exists.

And since that change freeipa has:
if [ -f /etc/ipa/nssdb/cert8.db ]; then
around the call.

It also changed the import slightly - now the python being:

python2 -c 'from ipaclient.install.client import update_ipa_nssdb;

That in the "all-proposed" case with the cert8.db file copied over is still 
failing but differently:
/usr/bin/certutil -d /etc/ipa/nssdb -L -f /etc/ipa/nssdb/pwdfile.txt
certutil: function failed: SEC_ERROR_BAD_DATABASE: security library: bad 

The merge of nss was a minor bump 3.34->3.35
Also this is the nss version from Debian with the freeipa version from Debian. 
They seem to work together there.

I don't fully understand it yet - so filing this bug for a discussion.
I need the help of tjaalton who did the freeipa changes - maybe he knows what 
is going on.

Do we have to:
- rebuild freeipa against newer nss?
- just mark something as bad test
- something completely else?

** Affects: freeipa (Ubuntu)
     Importance: Undecided
         Status: New

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  failing autopkgtest due to password issue by nss

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