Bug 165772

Summary:	read-only root filesystem reported as mounted with "rw" option
Product:	Red Hat Enterprise Linux 4	Reporter:	Jason Vas Dias <jvdias>
Component:	system-config-netboot	Assignee:	Jason Vas Dias <jvdias>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	4.0	CC:	tao
Target Milestone:	---
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	RHBA-2005-484	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2005-10-05 13:49:47 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:
Bug Depends On:
Bug Blocks:	149000, 156322

Description Jason Vas Dias 2005-08-11 22:39:17 UTC

Description of problem:

Modern versions of initscripts' rc.sysinit require the "READONLY=yes" setting
to not attempt to re-mount the root directory RW .

The "READONLY=yes" setting should be specified in /etc/sysconfig/init for
diskless clients.

Without this setting, the root "/" NFS mount will be reported as being mounted
with option "rw", even though the exporting NFS server exports it with option
"ro", and the original NFS mount specified option "ro" .  Also, attempts to
create files on the / filesystem fail with the "Permission Denied" error, not
with "Read-only file system" error as expected. (Could be an NFS buglet here!)

So system-config-netboot's mkdiskless script should write the "READONLY=yes"
setting to /etc/sysconfig/init if no READONLY setting is specified there.
 
Version-Release number of selected component (if applicable):
ALL

How reproducible:
100%

Steps to Reproduce:
Boot diskless client with from a RHEL-4 client NFS root
  
Actual results:
Root filesystem is reported as being mounted 'rw'

Expected results:
/proc/mounts should show the 'ro' option for the NFS / filesystem


Additional info:

Comment 1 Jason Vas Dias 2005-08-12 01:14:27 UTC

This is now fixed with system-config-netboot-0.1.26, available from:
  http://people.redhat.com/~jvdias/system-config-netboot
The mkdiskless script now puts the 'READONLY=yes' option in /etc/sysconfig/init
if it is not there.

Comment 3 Red Hat Bugzilla 2005-10-05 13:49:47 UTC

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHBA-2005-484.html