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Bug 2148249

Summary:	ipa-client-install does not maintain server affinity during installation [rhel-7.9.z]
Product:	Red Hat Enterprise Linux 7	Reporter:	Trivino <ftrivino>
Component:	ipa	Assignee:	Florence Blanc-Renaud <frenaud>
Status:	CLOSED ERRATA	QA Contact:	Ganna Kaihorodova <gkaihoro>
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	7.4	CC:	frenaud, gkaihoro, kpfleming, mjurasek, rakkumar, rcritten, tscherf, tsorense
Target Milestone:	rc	Keywords:	Triaged
Target Release:	---	Flags:	gkaihoro: needinfo+ pm-rhel: mirror+
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:	ipa-4.6.8-5.el7_9.13	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2023-04-25 13:26:44 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Trivino 2022-11-24 17:43:23 UTC

Cloned from upstream: https://pagure.io/freeipa/issue/9228

### Issue
ipa-client-install generates a temporary krb5.conf with a single KDC configured for ipa-join call. Once that is completed the temporary configuration is dropped and a full one is created, enabling DNS discovery by default.

A number of Kerberos operations occur after that, including connecting to the IPA API.

This can fail if a different server is picked via DNS and the ipa-client-install operations are faster than replication. This can lead to failures due to unknown hosts.

This was discovered by performance testing to determine how many simultaneous client installations can be performed. It was found that when additional IPA servers were added the capacity unexpectedly went down. It is this replication race that is the underlying problem.

The proposal is to retain the temporary configuration until nearer the end of installation and then write the final one.

#### Steps to Reproduce
1. Install IPA + 1 or more replicas
2. Run simultaneous client installations. It sometimes doesn't require many. It's race so unpredictable

#### Actual behavior
On the client side it will fail with a message that the TGT has been revoked.

gssapi.raw.misc.GSSError: Major (851968): Unspecified GSS failre. Minor code may provide more informatino, Minor (2529638932): TGT has been revoked

The server side logs "PAC issue: ipadb_get_principal_failed "
(what do you expect to happen)

#### Expected behavior

Scale enrollments with additional servers.

#### Version/Release/Distribution

Tested on Fedora 36 with 4.9.10-3.fc36

Comment 3 Florence Blanc-Renaud 2022-11-25 08:55:44 UTC

*** Bug 2148250 has been marked as a duplicate of this bug. ***

Comment 4 Florence Blanc-Renaud 2022-11-25 08:56:54 UTC

*** Bug 2148253 has been marked as a duplicate of this bug. ***

Comment 5 Florence Blanc-Renaud 2022-11-25 08:57:09 UTC

*** Bug 2148256 has been marked as a duplicate of this bug. ***

Comment 6 Florence Blanc-Renaud 2022-11-25 08:59:19 UTC

*** Bug 2148367 has been marked as a duplicate of this bug. ***

Comment 7 Florence Blanc-Renaud 2022-11-25 09:00:03 UTC

*** Bug 2148368 has been marked as a duplicate of this bug. ***

Comment 8 Florence Blanc-Renaud 2022-11-25 09:06:31 UTC

Upstream ticket https://pagure.io/freeipa/issue/9228

Fixed upstream
master:
    https://pagure.io/freeipa/c/9d9d925b14dbf627546c51c47f6d4e7827645610 Defer creating the final krb5.conf on clients

ipa-4-10:
    https://pagure.io/freeipa/c/3cbf2b25422100cc4105dfb09ee8c7bf87232198 Defer creating the final krb5.conf on clients

ipa-4-9:
    https://pagure.io/freeipa/c/69413325158a3ea06d1491acd77ee6e0955ee89a Defer creating the final krb5.conf on clients

Comment 18 Florence Blanc-Renaud 2023-03-17 09:32:11 UTC

Fixed upstream
ipa-4-6:
https://pagure.io/freeipa/c/0555c4821b72a3d094ab3fb15bb6637475fcfaa5
https://pagure.io/freeipa/c/d79cf3a8c99d13b91051728477cabecdc5948c36
https://pagure.io/freeipa/c/abc4df17087e9c0ef4f3d5ae5860fed84b67ebb8

Comment 31 errata-xmlrpc 2023-04-25 13:26:44 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (ipa bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2023:1990