[Bugs] [Bug 1207227] New: Data Tiering:remove cold/hot brick seems to be behaving like or emulating detach-tier
bugzilla at redhat.com
bugzilla at redhat.com
Mon Mar 30 13:18:52 UTC 2015
https://bugzilla.redhat.com/show_bug.cgi?id=1207227
Bug ID: 1207227
Summary: Data Tiering:remove cold/hot brick seems to be
behaving like or emulating detach-tier
Product: GlusterFS
Version: mainline
Component: cli
Severity: high
Assignee: bugs at gluster.org
Reporter: nchilaka at redhat.com
CC: bugs at gluster.org, gluster-bugs at redhat.com
Description of problem:
=======================
In a tiered volume,removing a brick fails.
When i tried to remove a cold brick it failed but when i observed the gluster
volume status, it says that it tried removing the hot-tiered bricks
So, is the code such that a remove-brick is trying to do nothing but just
detach a tier? If so it is a serious problem.
[root at interstellar glusterfs]# gluster v status vol2
Status of volume: vol2
Gluster process TCP Port RDMA Port Online Pid
------------------------------------------------------------------------------
Brick transformers:/pavanbrick2/vol2/hb1 49155 0 Y 30169
Brick interstellar:/pavanbrick2/vol2/hb1 49155 0 Y 25245
Brick interstellar:/pavanbrick1/vol2/b1 49154 0 Y 25112
Brick transformers:/pavanbrick1/vol2/b1 49154 0 Y 30106
NFS Server on localhost N/A N/A N N/A
NFS Server on 10.70.34.44 N/A N/A N N/A
Task Status of Volume vol2
------------------------------------------------------------------------------
Task : Remove brick
ID : 2ef83cf9-4e2f-4bc0-8b8b-90ed3fb3fca7
Removed bricks:
interstellar:/pavanbrick2/vol2/hb1
transformers:/pavanbrick2/vol2/hb1
Status : failed
Version-Release number of selected component (if applicable):
============================================================
3.7 upstream nightlies build
http://download.gluster.org/pub/gluster/glusterfs/nightly/glusterfs/epel-6-x86_64/glusterfs-3.7dev-0.821.git0934432.autobuild//
root at interstellar glusterfs]# gluster --version
glusterfs 3.7dev built on Mar 28 2015 01:05:28
Repository revision: git://git.gluster.com/glusterfs.git
Copyright (c) 2006-2011 Gluster Inc. <http://www.gluster.com>
GlusterFS comes with ABSOLUTELY NO WARRANTY.
You may redistribute copies of GlusterFS under the terms of the GNU General
Public License.
How reproducible:
=================
Easy to reproduce
Steps to Reproduce:
==================
1.create a gluster volume(i created a distribute type) and start the volume and
attach a tier to the volume using attach-tier
Following is the vol i created
[root at interstellar glusterfs]# gluster v create vol2
interstellar:/pavanbrick1/vol2/b1 transformers:/pavanbrick1/vol2/b1
volume create: vol2: success: please start the volume to access data
[root at interstellar glusterfs]# gluster v start vol2
gluster v savolume start: vol2: success
[root at interstellar glusterfs]# gluster v status vol2
Status of volume: vol2
Gluster process TCP Port RDMA Port Online Pid
------------------------------------------------------------------------------
Brick interstellar:/pavanbrick1/vol2/b1 49154 0 Y 25112
Brick transformers:/pavanbrick1/vol2/b1 49154 0 Y 30106
NFS Server on localhost 2049 0 Y 25136
NFS Server on 10.70.34.44 2049 0 Y 30129
Task Status of Volume vol2
------------------------------------------------------------------------------
There are no active volume tasks
[root at interstellar glusterfs]# gluster v attach-tier vol2
interstellar:/pavanbrick2/vol2/hb1 transformers:/pavanbrick2/vol2/hb1
volume add-brick: success
[root at interstellar glusterfs]# gluster v info vol2
Volume Name: vol2
Type: Tier
Volume ID: 8f6cd80e-f058-4713-a598-2bb641fa64cf
Status: Started
Number of Bricks: 4 x 1 = 4
Transport-type: tcp
Bricks:
Brick1: transformers:/pavanbrick2/vol2/hb1
Brick2: interstellar:/pavanbrick2/vol2/hb1
Brick3: interstellar:/pavanbrick1/vol2/b1
Brick4: transformers:/pavanbrick1/vol2/b1
[root at interstellar glusterfs]# gluster v status vol2
Status of volume: vol2
Gluster process TCP Port RDMA Port Online Pid
------------------------------------------------------------------------------
Brick transformers:/pavanbrick2/vol2/hb1 49155 0 Y 30169
Brick interstellar:/pavanbrick2/vol2/hb1 49155 0 Y 25245
Brick interstellar:/pavanbrick1/vol2/b1 49154 0 Y 25112
Brick transformers:/pavanbrick1/vol2/b1 49154 0 Y 30106
NFS Server on localhost N/A N/A N N/A
NFS Server on 10.70.34.44 N/A N/A N N/A
Task Status of Volume vol2
------------------------------------------------------------------------------
There are no active volume tasks
2.Now i am trying to remove a coldbrick as below
[root at interstellar glusterfs]# gluster v remove-brick vol2
transformers:/pavanbrick1/vol2/b1 start
volume remove-brick start: success
ID: 2ef83cf9-4e2f-4bc0-8b8b-90ed3fb3fca7
[root at interstellar glusterfs]# gluster v remove-brick vol2
transformers:/pavanbrick1/vol2/b1 status
Node Rebalanced-files size
scanned failures skipped status run time in secs
--------- ----------- -----------
----------- ----------- ----------- ------------ --------------
localhost 0 0Bytes
0 0 0 failed 0.00
10.70.34.44 0 0Bytes
0 0 0 failed 0.00
3.If you see i tried to remove the brick transformers:/pavanbrick1/vol2/b1
start which is a cold brick.
But see the vol status it shows it tried to remove hot bricks as below:
[root at interstellar glusterfs]# gluster v status vol2
Status of volume: vol2
Gluster process TCP Port RDMA Port Online Pid
------------------------------------------------------------------------------
Brick transformers:/pavanbrick2/vol2/hb1 49155 0 Y 30169
Brick interstellar:/pavanbrick2/vol2/hb1 49155 0 Y 25245
Brick interstellar:/pavanbrick1/vol2/b1 49154 0 Y 25112
Brick transformers:/pavanbrick1/vol2/b1 49154 0 Y 30106
NFS Server on localhost N/A N/A N N/A
NFS Server on 10.70.34.44 N/A N/A N N/A
Task Status of Volume vol2
------------------------------------------------------------------------------
Task : Remove brick
ID : 2ef83cf9-4e2f-4bc0-8b8b-90ed3fb3fca7
Removed bricks:
interstellar:/pavanbrick2/vol2/hb1
transformers:/pavanbrick2/vol2/hb1
Status : failed
Expected results:
================
remove a cold brick should remove a cold brick and not touch hot tier
Additional info(CLI logs):
===============
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