[Freeipa-devel] [PATCHSET] Replica promotion patches

Tue Sep 22 14:57:27 UTC 2015

On Tue, 2015-09-22 at 10:45 +0200, Jan Cholasta wrote:
> Hi,
> 
> On 9.9.2015 20:25, Simo Sorce wrote:
> > On Wed, 2015-08-26 at 17:27 -0400, Simo Sorce wrote:
> >> This patchset implements https://fedorahosted.org/freeipa/ticket/2888
> >> and introduces a number of required  changes and dependencies to achieve
> >> this goal.
> >> This work requires the custodia project to securely transfer keys
> >> between ipa servers.
> >>
> >> This work is not 100% complete, it still misses the ability to install
> >> kra instances and the ability to install a CA (via ipa-ca-install) with
> >> externally signed certs.
> >>
> >> However it is massive enough that warrants review and pushing, the resat
> >> of the changes can be applied later as this work should not disrupt the
> >> classic install methods.
> >>
> >> In order to build my previous patches (530-533) are needed as well as a
> >> number of updated components.
> >>
> >> I used the following coprs for testing:
> >> simo/jwcrypto
> >> simo/custodia
> >> abbra/sssd-kkdcproxy (for sssd 1.13.1)
> >> lkrispen/389-ds-current (for 389 > 1.3.4.4)
> >> vakwetu/dogtag_10.2.7_test_builds (for dogtag 10.2.7)
> >> mkosek/freeipa-4.2-fedora-22 (misc)
> >> fedora/updates-testing (python-gssapi 1.1.2)
> >>
> >> Ludwig's copr is necessary to have a functional DNA plugin in replicas,
> >> eventually his patches should be committed in 389-ds-base 1.3.4.4 when
> >> it will be released.
> >>
> >> We are aware of a dogtag bug https://fedorahosted.org/pki/ticket/1580
> >> that may cause installation issues in some case (re-install of a
> >> replica).
> >>
> >> The domain must be raised to level 1 in order to use replica promotion.
> >>
> >> In order to promote a replica the server must be first joined as a
> >> regular client to the domain.
> >>
> >> This is the flow I usually use for testing:
> >>
> >> # ipa-client-install
> >> # kinit admin
> >> # ipa-replica-install --promote --setup-ca
> >> <perform operations like add user, get keytabs, get certificates,
> >> etc...>
> >>
> >> These patches are also available in this git tree rebnase on current
> >> master:
> >> https://fedorapeople.org/cgit/simo/public_git/freeipa.git/log/?h=custodia-review
> >
> > FYI: I rebased this branch on top of master and applied minor changes to
> > one of the DNS patches. I also added the missing support to install KRA.
> >
> > DS 1.3.4.4 is also in Fedora updates testing, so ludwig's copr is not
> > needed anymore.
> >
> > Dogtag's ticket is not fixed yet so running both --setup-ca and
> > --setup-kra at the same time will still yield an error and install will
> > fail.
> >
> > Please let me know if there are any major issues with this patchset, I'd
> > like to push it to master and attack the remaining issues as add ons
> > (install with external certs not supported yet for example)
> 
> So far I have only read through the code without running it (mostly).
> 
> 
> "Remove unused arguments": ACK
> 
> 
> "Simplify the install_replica_ca function": ACK

Thanks for pushing these.

> 
> "IPA Custodia Daemon":
> 
> 1) Instead of putting the code in "ipakeys" package, could you put it in 
> "ipapython.keys"? This way it would be consistent with DNSSEC, which has 
> binaries in daemons/dnssec/ and modules in ipapython/dnssec/.

I think I can do this, it was originally all in daemon becuse that's
where I had the custodia submodules, but we do not carry a copy anymore.

> 2) Is it safe to create cn=custodia in update file only? Updates are 
> executed late in ipa-server-install. Is is guaranteed that nothing will 
> try to access cn=custodia before the updates are run?
> 
> (Nevermind, it is added to bootstrap-template.ldif 2 commits below.)
> 
> 3) Shouldn't cn=custodia be created only when domain level >= 1?

It is used only at >= 1 level, but we have to create it when we update
the code, otherwise you cannot switch to level 1.
Switching a level ion LDAP cannot cause an update script to be run so
you would have incomplete servers publicizing level 1 but not offering a
critical service for level 1.

> 4) pylint fails with:
> 
> daemons/ipa-custodia/ipakeys/kem.py:156: [E1002(super-on-old-class), 
> IPAKEMKeys.__init__] Use of super on an old style class)
> daemons/ipa-custodia/ipakeys/kem.py:178: [E1101(no-member), 
> IPAKEMKeys.generate_server_keys] Instance of 'IPAKEMKeys' has no 
> 'config' member)
> daemons/ipa-custodia/ipakeys/kem.py:187: [E1101(no-member), 
> IPAKEMKeys.server_keys] Instance of 'IPAKEMKeys' has no 'config' member)

On what pylint version ?
I had to disable pylint for a while but it currently runs and doesn't
complain to me ...

> 5) There are some PEP8 transgressions:
> 
> ./daemons/ipa-custodia/ipakeys/kem.py:202:80: E501 line too long (82 > 
> 79 characters)
> ./daemons/ipa-custodia/ipakeys/kem.py:203:80: E501 line too long (82 > 
> 79 characters)
> ./daemons/ipa-custodia/ipakeys/store.py:33:1: E302 expected 2 blank 
> lines, found 1
> ./daemons/ipa-custodia/setup.py:8:9: E251 unexpected spaces around 
> keyword / parameter equals
> ./daemons/ipa-custodia/setup.py:8:11: E251 unexpected spaces around 
> keyword / parameter equals
> ./daemons/ipa-custodia/setup.py:9:12: E251 unexpected spaces around 
> keyword / parameter equals
> ./daemons/ipa-custodia/setup.py:9:14: E251 unexpected spaces around 
> keyword / parameter equals
> ./daemons/ipa-custodia/setup.py:10:12: E251 unexpected spaces around 
> keyword / parameter equals
> ./daemons/ipa-custodia/setup.py:10:14: E251 unexpected spaces around 
> keyword / parameter equals
> ./daemons/ipa-custodia/setup.py:11:15: E251 unexpected spaces around 
> keyword / parameter equals
> ./daemons/ipa-custodia/setup.py:11:17: E251 unexpected spaces around 
> keyword / parameter equals
> ./daemons/ipa-custodia/setup.py:12:21: E251 unexpected spaces around 
> keyword / parameter equals
> ./daemons/ipa-custodia/setup.py:12:23: E251 unexpected spaces around 
> keyword / parameter equals
> ./daemons/ipa-custodia/setup.py:14:13: E251 unexpected spaces around 
> keyword / parameter equals
> ./daemons/ipa-custodia/setup.py:14:15: E251 unexpected spaces around 
> keyword / parameter equals
> ./daemons/ipa-custodia/setup.py:16:1: W391 blank line at end of file

I'll take care of these.

> "Add Custodia Client code":
> 
> 1) Is there any significance in having this in a separate commit? I 
> would think it can be safely squashed in the previous commit.

Easier review (and rebasing), I want to keep chunks smaller.

> 2) There is one PEP8 transgression:
> 
> ./daemons/ipa-custodia/ipakeys/client.py:45:5: E303 too many blank lines (2)
> 
> 
> "Install ipa-custodia with the rest of ipa":
> 
> 1) python-jwcrypto dependency is missing in the spec file.

It shouldn't be necessary as custodia already depends on it.

> 2) I believe the daemons/ipa-custodia/* and 
> install/share/bootstrap-template.ldif should be in the "IPA Custodia 
> Daemon" commit. At the very least it would make reviews easier.

ok

> 3) There is one PEP8 transgressions:
> 
> ./ipaserver/install/custodiainstance.py:10:1: E302 expected 2 blank 
> lines, found 1
> 
> 
> "Require a DS version that has working DNA plugin": ACK
> 
> 
> "Implement replica promotion functionality":
> 
> 1) I think a RuntimeError or sys.exit with an error message would be 
> better than NotImplementedError for the unimplemented options.
> 
> (Nevermind, these are removed in further commits.)

They were for my use indeed :)

> 2) There is no domain level check when installing the replica from a 
> replica file.

And why would we need it ?
We discussed about preventing generation of a replica file at level 1,
but that is not part of this patchset.

> 3) Instead of returning INSTALL_ERROR from promote_check() (which has no 
> effect), raise an exception or call sys.exit().

ok

> 4) The --promote option is redundant. You can safely decide whether to 
> promote or not based on whether replica file was provided or not and the 
> domain level of the remote server.

Except there is a chick/egg issue in getting there, I am ok removing
--promote in a followup patch, but not changing it in this patchset, it
would require too much churn.

> 5) There are some PEP8 transgressions:
> 
> ./ipaserver/install/cainstance.py:264:35: E231 missing whitespace after ','
> ./ipaserver/install/cainstance.py:264:49: E231 missing whitespace after ','
> ./ipaserver/install/cainstance.py:264:63: E231 missing whitespace after ','
> ./ipaserver/install/cainstance.py:267:49: E203 whitespace before ','
> ./ipaserver/install/dsinstance.py:258:80: E501 line too long (88 > 79 
> characters)
> ./ipaserver/install/dsinstance.py:317:80: E501 line too long (90 > 79 
> characters)
> ./ipaserver/install/dsinstance.py:457:5: E303 too many blank lines (2)
> ./ipaserver/install/installutils.py:1115:1: E302 expected 2 blank lines, 
> found 1
> ./ipaserver/install/krbinstance.py:185:80: E501 line too long (85 > 79 
> characters)
> ./ipaserver/install/krbinstance.py:186:80: E501 line too long (85 > 79 
> characters)
> ./ipaserver/install/krbinstance.py:191:80: E501 line too long (92 > 79 
> characters)
> ./ipaserver/install/server/replicainstall.py:412:1: E302 expected 2 
> blank lines, found 1
> ./ipaserver/install/server/replicainstall.py:862:25: E128 continuation 
> line under-indented for visual indent
> ./ipaserver/install/server/replicainstall.py:864:25: E128 continuation 
> line under-indented for visual indent
> ./ipaserver/install/server/replicainstall.py:865:25: E128 continuation 
> line under-indented for visual indent
> ./ipaserver/install/server/replicainstall.py:1014:13: E128 continuation 
> line under-indented for visual indent
> ./ipaserver/install/server/replicainstall.py:1044:42: E231 missing 
> whitespace after ','
> ./ipaserver/install/server/replicainstall.py:1125:5: E303 too many blank 
> lines (2)
> 
> 
> "Change DNS installer code to use passed in api": LGTM
> 
> 
> "Allow ipa-replica-conncheck to use default creds": LGTM
> 
> 
> "Add function to extract CA certs for install": LGTM
> 
> 
> "Allow to setup the CA when promoting a replica":
> 
> 1) There are some PEP8 transgressions:
> 
> ./ipaserver/install/ca.py:35:13: E125 continuation line with same indent 
> as next logical line
> ./ipaserver/install/cainstance.py:1488:5: E303 too many blank lines (2)
> ./ipaserver/install/replication.py:421:24: E231 missing whitespace after ','
> ./ipaserver/install/replication.py:421:35: E231 missing whitespace after ','
> ./ipaserver/install/replication.py:421:41: E231 missing whitespace after ','
> ./ipaserver/install/replication.py:422:24: E231 missing whitespace after ','
> ./ipaserver/install/replication.py:422:40: E231 missing whitespace after ','
> ./ipaserver/install/replication.py:422:46: E231 missing whitespace after ','
> ./ipaserver/install/replication.py:524:37: E128 continuation line 
> under-indented for visual indent
> ./ipaserver/install/replication.py:524:38: E201 whitespace after '['
> ./ipaserver/install/replication.py:524:80: E501 line too long (187 > 79 
> characters)
> ./ipaserver/install/replication.py:526:80: E501 line too long (106 > 79 
> characters)
> ./ipaserver/install/replication.py:560:80: E501 line too long (86 > 79 
> characters)
> ./ipaserver/install/replication.py:847:80: E501 line too long (81 > 79 
> characters)
> ./ipaserver/install/replication.py:850:80: E501 line too long (89 > 79 
> characters)
> ./ipaserver/install/replication.py:1761:80: E501 line too long (81 > 79 
> characters)
> ./ipaserver/install/replication.py:1766:17: E128 continuation line 
> under-indented for visual indent
> ./ipaserver/install/replication.py:1807:80: E501 line too long (89 > 79 
> characters)
> 
> 
> "Make checks for existing credentials reusable":
> 
> 1) There are some PEP8 transgressions:
> 
> ./ipaserver/install/installutils.py:1140:1: E302 expected 2 blank lines, 
> found 1
> ./ipaserver/install/installutils.py:1192:25: E128 continuation line 
> under-indented for visual indent
> ./ipaserver/install/installutils.py:1194:25: E128 continuation line 
> under-indented for visual indent
> ./ipaserver/install/installutils.py:1195:25: E128 continuation line 
> under-indented for visual indent
> 
> 
> "Allow ipa-ca-install to use the new promotion code":
> 
> 1) The --replica option is redundant. You can safely decide whether this 
> is the first CA master or not based on information in cn=masters.
> 
> 2) There are some PEP8 transgressions:
> 
> ./ipaserver/install/dsinstance.py:173:26: E231 missing whitespace after ','
> ./ipaserver/install/dsinstance.py:173:40: E231 missing whitespace after ','
> 
> 
> "Remove unused kra option": ACK
> 
> 
> "Allow to install the KRA on a promoted server":
> 
> 1) There are some PEP8 transgressions:
> 
> ./ipaserver/install/ipa_kra_install.py:198:33: E127 continuation line 
> over-indented for visual indent
> ./ipaserver/install/krainstance.py:55:1: E302 expected 2 blank lines, 
> found 1
> ./ipaserver/install/krainstance.py:382:13: E128 continuation line 
> under-indented for visual indent
> ./ipaserver/install/server/replicainstall.py:1073:18: E225 missing 
> whitespace around operator
> ./ipaserver/install/server/replicainstall.py:1081:5: E303 too many blank 
> lines (2)
> ./ipaserver/install/service.py:103:1: E302 expected 2 blank lines, found 1
> ./ipaserver/install/service.py:115:52: E203 whitespace before ','
> 
> 
> Pushed first 2 commits to master: d8b1f42f171d666068583548315b4684e5f3c3a4

Ok, I'll rework the patches as possible, do you want a new patchset sent
to the list ? Or is it ok to rebnase the custodia-review branch in my
freeipa.git tree ?

Simo.

-- 
Simo Sorce * Red Hat, Inc * New York