[Bugs] [Bug 1211562] New: Data Tiering:UI:changes required to CLI responses for attach and detach tier

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1211562

            Bug ID: 1211562
           Summary: Data Tiering:UI:changes required to CLI responses for
                    attach and detach tier
           Product: GlusterFS
           Version: mainline
         Component: tiering
          Severity: medium
          Assignee: bugs at gluster.org
          Reporter: nchilaka at redhat.com
        QA Contact: bugs at gluster.org
                CC: bugs at gluster.org



Description of problem:
======================
The response user gets after executing a attach-tier or detach-tier right now
are quite ambigous. They talk about brick rather than the tier.
Eg: on a attach tier it says "add-brick is success"
[root at yarrow ~]# gluster v attach-tier ec_vol1 yarrow:/yarrow_ssd_75G_2/ec_vol1
rhs-client6:/brick15/ec_vol1 force
volume add-brick: success
[root at yarrow ~]# gluster v info ec_vol1


It should instead say, attaching of tier to <volname> is successful


same with detach tier, it say remove-brick is success

Need to take care even when the command fails, like it should be detach-tier
fails rather than remove-brick fails


Version-Release number of selected component (if applicable):
============================================================
[root at yarrow ~]# gluster --version
glusterfs 3.7dev built on Apr  8 2015 17:57:45
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.
[root at yarrow ~]# rpm -qa|grep gluster
glusterfs-cli-3.7dev-0.994.gitf522001.el6.x86_64
glusterfs-server-3.7dev-0.994.gitf522001.el6.x86_64
glusterfs-libs-3.7dev-0.994.gitf522001.el6.x86_64
glusterfs-fuse-3.7dev-0.994.gitf522001.el6.x86_64
glusterfs-3.7dev-0.994.gitf522001.el6.x86_64
glusterfs-api-3.7dev-0.994.gitf522001.el6.x86_64



How reproducible:
=================
always and easily


Steps to Reproduce:
==================
1.create a regular volume
2.attach a tier, the reponse user gets talks abt brick rather than tier
3.same with detaching the tier

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