133 lines
8.6 KiB
ReStructuredText
133 lines
8.6 KiB
ReStructuredText
==============================
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Koji Kerberos/GSSAPI debugging
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==============================
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Run basic command Koji with debug option isn't help to debug Kerberos/GSSAPI issue.
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In successful call you'll see what authentication method was used and was is the
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koji server connected to:
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::
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$ kinit my_account@FEDORAPROJECT.ORG
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Password for my_account@FEDORAPROJECT.ORG:
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$ koji hello
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successfully connected to hub
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dobrý den, my_account!
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You are using the hub at https://koji.fedoraproject.org/kojihub
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Authenticated via GSSAPI
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...or you can get some error:
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::
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$ koji hello
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2021-04-23 09:45:22,732 [ERROR] koji: (gssapi auth failed: requests.exceptions.HTTPError: 401 Client Error: Unauthorized for url: https://koji.fedoraproject.org/kojihub/ssllogin)
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Use following documentation to debug kerberos/gssapi auth issues. https://docs.pagure.org/koji/kerberos_gssapi_debug/
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2021-04-23 09:45:22,734 [ERROR] koji: GSSAPIAuthError: unable to obtain a session (gssapi auth failed: requests.exceptions.HTTPError: 401 Client Error: Unauthorized for url: https://koji.fedoraproject.org/kojihub/ssllogin)
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Use following documentation to debug kerberos/gssapi auth issues. https://docs.pagure.org/koji/kerberos_gssapi_debug/
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In this case we see not one but two errors while trying to authenticate. Let's
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see what more info we can get:
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::
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$ KRB5_TRACE=/dev/stdout python koji -d hello
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2021-04-23 09:47:58,730 [DEBUG] koji: Opening new requests session
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2021-04-23 09:47:58,731 [DEBUG] koji: Opening new requests session
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2021-04-23 09:47:59,446 [DEBUG] koji: Opening new requests session
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2021-04-23 09:47:59,446 [ERROR] koji: (gssapi auth failed: requests.exceptions.HTTPError: 401 Client Error: Unauthorized for url: https://koji.fedoraproject.org/kojihub/ssllogin)
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Use following documentation to debug kerberos/gssapi auth issues. https://docs.pagure.org/koji/kerberos_gssapi_debug/
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Traceback (most recent call last):
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File "/usr/bin/koji", line 335, in <module>
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rv = locals()[command].__call__(options, session, args)
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File "/home/tkopecek/cvs/koji/cli/koji_cli/commands.py", line 7496, in handle_moshimoshi
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activate_session(session, options)
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File "/home/tkopecek/cvs/koji/cli/koji_cli/lib.py", line 749, in activate_session
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session.gssapi_login(proxyuser=runas)
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File "/home/tkopecek/cvs/koji/koji/__init__.py", line 2513, in gssapi_login
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raise GSSAPIAuthError(err)
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koji.GSSAPIAuthError: unable to obtain a session (gssapi auth failed: requests.exceptions.HTTPError: 401 Client Error: Unauthorized for url: https://koji.fedoraproject.org/kojihub/ssllogin)
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Use following documentation to debug kerberos/gssapi auth issues. https://docs.pagure.org/koji/kerberos_gssapi_debug/
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We see no output from krbV library. It indicates that there was no significant
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interaction with the library. Main reason would be missing ``kinit``. Fixing
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this problem is pretty easy. What about other problems?
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You can see wrong URL for the hub. Check if it is coming from system-wide config
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``/etc/koji.conf`` or anything in ``/etc/koji.conf.d`` or ``~/.koji/config``.
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Maybe URL for your instance has changed or some old config was forgotten in
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place.
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Compare with successful output when krbV library does its work:
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::
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$ KRB5_TRACE=/dev/stdout koji -d hello
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2021-04-23 09:50:34,442 [DEBUG] koji: Opening new requests session
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2021-04-23 09:50:34,442 [DEBUG] koji: Opening new requests session
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[36315] 1619164236.523876: TXT record _kerberos.koji.fedoraproject.org. not found
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[36315] 1619164236.523877: TXT record _kerberos.fedoraproject.org. found: FEDORAPROJECT.ORG
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[36315] 1619164236.523878: ccselect module realm chose cache FILE:/tmp/krb5cc_1000 with client principal my_account@FEDORAPROJECT.ORG for server principal HTTP/koji.fedoraproject.org@FEDORAPROJECT.ORG
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[36315] 1619164236.523879: Getting credentials my_account@FEDORAPROJECT.ORG -> HTTP/koji.fedoraproject.org@ using ccache FILE:/tmp/krb5cc_1000
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[36315] 1619164236.523880: Retrieving my_account@FEDORAPROJECT.ORG -> HTTP/koji.fedoraproject.org@ from FILE:/tmp/krb5cc_1000 with result: -1765328243/Matching credential not found (filename: /tmp/krb5cc_1000)
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[36315] 1619164236.523881: Retrying my_account@FEDORAPROJECT.ORG -> HTTP/koji.fedoraproject.org@FEDORAPROJECT.ORG with result: -1765328243/Matching credential not found (filename: /tmp/krb5cc_1000)
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[36315] 1619164236.523882: Server has referral realm; starting with HTTP/koji.fedoraproject.org@FEDORAPROJECT.ORG
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[36315] 1619164236.523883: Retrieving my_account@FEDORAPROJECT.ORG -> krbtgt/FEDORAPROJECT.ORG@FEDORAPROJECT.ORG from FILE:/tmp/krb5cc_1000 with result: 0/Success
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[36315] 1619164236.523884: Starting with TGT for client realm: my_account@FEDORAPROJECT.ORG -> krbtgt/FEDORAPROJECT.ORG@FEDORAPROJECT.ORG
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[36315] 1619164236.523885: Requesting tickets for HTTP/koji.fedoraproject.org@FEDORAPROJECT.ORG, referrals on
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[36315] 1619164236.523886: Generated subkey for TGS request: aes256-cts/A108
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[36315] 1619164236.523887: etypes requested in TGS request: aes256-cts, aes128-cts, aes256-sha2, aes128-sha2, rc4-hmac, camellia128-cts, camellia256-cts
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[36315] 1619164236.523889: Encoding request body and padata into FAST request
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[36315] 1619164236.523890: Sending request (977 bytes) to FEDORAPROJECT.ORG
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[36315] 1619164236.523891: Sending DNS URI query for _kerberos.FEDORAPROJECT.ORG.
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[36315] 1619164236.523892: URI answer: 10 1 "krb5srv:m:kkdcp:https://id.fedoraproject.org/KdcProxy/"
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[36315] 1619164236.523893: Resolving hostname id.fedoraproject.org
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[36315] 1619164236.523894: TLS certificate name matched "id.fedoraproject.org"
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[36315] 1619164236.523895: Sending HTTPS request to https 152.19.134.142:443
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[36315] 1619164237.522076: Received answer (929 bytes) from https 152.19.134.142:443
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[36315] 1619164237.522077: Terminating TCP connection to https 152.19.134.142:443
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[36315] 1619164237.522078: Response was from master KDC
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[36315] 1619164237.522079: Decoding FAST response
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[36315] 1619164237.522080: FAST reply key: aes256-cts/F6DC
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[36315] 1619164237.522081: TGS reply is for my_account@FEDORAPROJECT.ORG -> HTTP/koji.fedoraproject.org@FEDORAPROJECT.ORG with session key aes256-cts/A3FF
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[36315] 1619164237.522082: TGS request result: 0/Success
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[36315] 1619164237.522083: Received creds for desired service HTTP/koji.fedoraproject.org@FEDORAPROJECT.ORG
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[36315] 1619164237.522084: Storing my_account@FEDORAPROJECT.ORG -> HTTP/koji.fedoraproject.org@ in FILE:/tmp/krb5cc_1000
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[36315] 1619164237.522086: Creating authenticator for my_account@FEDORAPROJECT.ORG -> HTTP/koji.fedoraproject.org@, seqnum 742219461, subkey aes256-cts/1CC1, session key aes256-cts/A3FF
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successfully connected to hub
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dobrý den, my_account!
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You are using the hub at https://koji.fedoraproject.org/kojihub
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Authenticated via GSSAPI
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Most problems could be tracked down by this command plus kinit/klist tools. for
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list of these consult next section.
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General problems
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================
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* *No KRB5_TRACE output* - You've not run ``kinit`` in first place, run ``kinit``.
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* If yes, maybe ticket is no longer valid - check ``klist`` + run ``kinit``
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* *Hub URL is wrong* - check configs, find out right URL for your environment,
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update related packages (e.g. ``fedora-packager``)
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* *Wrong service ticket* - e.g. because your instance is hidden behind a proxy.
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In such a case, you'll see a wrong principal in the output, such as e.g.
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``HTTP/proxy10.fedoraproject.org@FEDORAPROJECT.ORG``. Kerberos
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authentication will fail because ``krbV`` will try to fetch a service ticket for
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PTR instead of a DNS record, effectively asking for a wrong service.
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The correct form is ``HTTP/koji.fedoraproject.org@FEDORAPROJECT.ORG``
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(also listed as "Ticket Server" in klist output). This problem is usually
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caused by a wrong value of ``dns_canonicalize_hostname`` in ``/etc/krb5.conf``.
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Please try setting it to ``true``, ``fallback`` and ``false`` in turn,
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as different values may be required depending on your situation.
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* *You can't get service ticket at all*. You've not set up the ``/etc/krb5.conf``
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for relevant KDC/REALM. It shouldn't happen if you were able to ``kinit`` with
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the correct credentials (It means that you've already set up something).
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Anyway, you'll see following in the debug output
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* *Your user account was disabled* This error is not krbV specific. But you can
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hit it. In such case you will see simple message ``koji: AuthError: unable to
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obtain a session``. From security reasons we don't display it differently from
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non-existent account. If you've suspicion that it could be the reason you need
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to check with your koji instance admin.
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