Bug 1264814

Summary:	Users have write access when the nfs volume accessmode is only ROX
Product:	OKD	Reporter:	Chao Yang <chaoyang>
Component:	Storage	Assignee:	Mark Turansky <mturansk>
Status:	CLOSED NOTABUG	QA Contact:	Liang Xia <lxia>
Severity:	medium	Docs Contact:
Priority:	medium
Version:	3.x	CC:	aos-bugs, xtian
Target Milestone:	---	Keywords:	NeedsTestCase
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2015-10-27 15:37:32 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Chao Yang 2015-09-21 09:35:07 UTC

Description of problem:
Users have write access when the nfs volume accessmode is only ROX

Version-Release number of selected component (if applicable):
oc v1.0.6-86-gfc46484
kubernetes v1.1.0-alpha.0-1605-g44c91b1

How reproducible:

always
Steps to Reproduce:
1. create pv with accessmode is ROX
oc get pv
NAME      LABELS    CAPACITY   ACCESSMODES   STATUS    CLAIM               REASON    AGE
nfs1      <none>    10Gi       ROX           Bound     default/myclaim-1             3d

2. create pvc with accessmode is ROX
oc get pvc
NAME        LABELS    STATUS    VOLUME    CAPACITY   ACCESSMODES   AGE
myclaim-1   <none>    Bound     nfs1      10Gi       ROX           3d

3.write some data on the mounted dir
oc exec nfs -ti -- bash
[root@nfs /]# cd /mnt
[root@nfs mnt]# ls
nfs
[root@nfs mnt]# cd nfs/

[root@nfs nfs]# ls
hi  next  test    world
[root@nfs nfs]# touch yes
[root@nfs nfs]# ls
hi  next  test    world  yes

Actual results:
users can wirte to the mounted dir even if the volume access mode is only ROX

Expected results:
users should not write to the mounted dir when the volume access mode is ROX

Additional info:

Comment 1 Mark Turansky 2015-09-23 15:09:21 UTC

this is not a bug.

A volume has all the capabilities of the underlying storage provider.  NFS allows many clients to read/write.

Comment 2 Chao Yang 2015-09-24 07:15:59 UTC

If pvc only request ROX, also can write to the volume? no restriction for the PVC?

Comment 3 Mark Turansky 2015-09-24 14:35:14 UTC

That is correct.

The volume *supports* ROX but does not *enforce* ROX if that's what the PVC requests.