glusterfs.git/doc, branch v3.9dev

common-ha: reliable grace using pacemaker notify actions

2016-03-15T04:34:27+00:00

Using *-dead_ip-1 resources to track on which nodes the ganesha.nfsd
had died was found to be unreliable.

Running `pcs status` in the ganesha_grace monitor action was seen to
time out during failover; the HA devs opined that it was, generally,
not a good idea to run `pcs status` in a monitor action in any event.
They suggested using the notify feature, where the resources on all
the nodes are notified when a clone resource agent dies.

This change adds a notify action to the ganesha_grace RA. The ganesha_mon
RA monitors its ganesha.nfsd daemon. While the daemon is running, it
creates two attributes: ganesha-active and grace-active. When the daemon
stops for any reason, the attributes are deleted. Deleting the
ganesha-active attribute triggers the failover of the virtual IP (the
IPaddr RA) to another node where ganesha.nfsd is still running. The
ganesha_grace RA monitors the grace-active attribute. When the
grace-active attibute is deleted, the ganesha_grace RA stops, and will
not restart. This triggers pacemaker to trigger the notify action in
the ganesha_grace RAs on the other nodes in the cluster; which send a
DBUS message to their ganesha.nfsd.

(N.B. grace-active is a bit of a misnomer. while the grace-active
attribute exists, everything is normal and healthy. Deleting the
attribute triggers putting the surviving ganesha.nfsds into GRACE.)

To ensure that the remaining/surviving ganesha.nfsds are put into
NFS-GRACE before the IPaddr (virtual IP) fails over there is a short
delay (sleep) between deleting the grace-active attribute and the
ganesha-active attribute. To summarize:
  1. on node 2 ganesha_mon:monitor notices that ganesha.nfsd has died
  2. on node 2 ganesha_mon:monitor deletes its grace-active attribute
  3. on node 2 ganesha_grace:monitor notices that grace-active is gone
     and returns OCF_ERR_GENERIC, a.k.a. new error. When pacemaker
     tries to (re)start ganesha_grace, its start action will return
     OCF_NOT_RUNNING, a.k.a. known error, don't attempt further
     restarts.
  4. on nodes 1, 3, etc., ganesha_grace:notify receives a post-stop
     notification indicating that node 2 is gone, and sends a DBUS
     message to its ganesha.nfsd putting it into NFS-GRACE.
  5. on node 2 ganesha_mon:monitor waits a short period, then deletes
     its ganesha-active attribute. This triggers the IPaddr (virt IP)
     failover according to constraint location rules.

ganesha_nfsd modified to run for the duration, start action is invoked
to setup the /var/lib/nfs symlink, stop action is invoked to restore it.
ganesha-ha.sh modified accordingly to create it as a clone resource.

BUG: 1290865
Change-Id: I1ba24f38fa4338b3aeb17c65645e9f439387ff57
Signed-off-by: Kaleb S KEITHLEY 
Reviewed-on: http://review.gluster.org/12964
Smoke: Gluster Build System 
NetBSD-regression: NetBSD Build System 
CentOS-regression: Gluster Build System 
Reviewed-on: http://review.gluster.org/13725

fuse: Address the review comments in the backport

2016-03-10T03:15:33+00:00

Backport @ http://review.gluster.org/#/c/13626/3

Fix a typo error, consolidate the selinux and capability
check in getxattr and setxattr.

Change-Id: I4303de3d4dd00853169b07577311e03cbb912ed7
BUG: 1316327
Signed-off-by: Poornima G 
Reviewed-on: http://review.gluster.org/13653
NetBSD-regression: NetBSD Build System 
Tested-by: Vijay Bellur 
Smoke: Gluster Build System 
CentOS-regression: Gluster Build System 
Reviewed-by: Vijay Bellur

gluster man page: adding geo-replication chapter

2016-03-01T07:58:48+00:00

geo-replication options are currently missing from gluster(8) man page.

Change-Id: I5d24de856be264e63d3ff49f9b82346476f20473
BUG: 1293950
Signed-off-by: Cedric Buissart 
Reviewed-on: http://review.gluster.org/13073
Reviewed-by: Saravanakumar Arumugam 
Smoke: Gluster Build System 
Tested-by: Aravinda VK 
NetBSD-regression: NetBSD Build System 
CentOS-regression: Gluster Build System 
Reviewed-by: Jeff Darcy

bitrot: Update 'scrub status' cmd in man page

2015-12-14T11:36:52+00:00

Update following bitrot status command in man page.
gluster vol bitrot  scrub status

Change-Id: I86aa123d568711c6b3d655b60cfd901a8d4c3408
BUG: 1286988
Signed-off-by: Kotresh HR 
Reviewed-on: http://review.gluster.org/12834
Reviewed-by: Gaurav Kumar Garg 
Reviewed-by: Venky Shankar 
Tested-by: Gluster Build System 
Tested-by: NetBSD Build System

docs: move contributor docs to the glusterdocs repository

2015-11-15T13:19:37+00:00

 *  Moved few files to glusterdocs repo
 *  Files were moved in pull requests given below:
    https://github.com/gluster/glusterdocs/pull/60
    https://github.com/gluster/glusterdocs/pull/62
 * This patch removes file from this repo which were
   moved to glusterdocs repo

Change-Id: I6e529911e0be66b261961c44bcdbe361aafa2886
BUG: 1206539
Signed-off-by: Bipin Kunal 
Reviewed-on: http://review.gluster.org/12576
Reviewed-by: Niels de Vos 
Tested-by: NetBSD Build System 
Tested-by: Gluster Build System

Remove selinux mount option from "man mount.glusterfs"

2015-11-10T15:11:30+00:00

Gluster doesn't SELinux mount option, so it is removed.

Change-Id: I471ad98a24b5f5d64279c805b3243cb1168dd3d1
BUG: 1274626
Signed-off-by: hari gowtham 
Reviewed-on: http://review.gluster.org/12422
Tested-by: Gluster Build System 
Tested-by: NetBSD Build System 
Reviewed-by: Vijay Bellur

build: Remove systemtap references from source

2015-11-10T14:09:04+00:00

We don't actually support systemtap. And so it is confusing
to have --enable-systemtap configure option in configure.ac.
This patch removes the systemtap option and corresponding
references from other files which include INSTALL, spec.in,
docs etc.

Change-Id: I719c22ca36f41a2faca156f8e41daea44e64b65e
BUG: 1198849
Signed-off-by: Anoop C S 
Reviewed-on: http://review.gluster.org/12565
Reviewed-by: Niels de Vos 
Tested-by: NetBSD Build System 
Tested-by: Gluster Build System

cluster/tier update man pages for tier feature

2015-10-19T16:29:46+00:00

Add to gluster man pages instructions for tier commands.

Change-Id: I0918460eeaba22bb6a11238d4f5501fa8e61da88
BUG: 1272557
Signed-off-by: Dan Lambright 
Reviewed-on: http://review.gluster.org/12380
Tested-by: NetBSD Build System 
Reviewed-by: N Balachandran

Porting developer guide to source code repo from glusterdocs project

2015-10-10T12:49:01+00:00

Change-Id: Ib8d9c668ebb05863918e6ec2b89908f206626f38
BUG: 1206539
Signed-off-by: Humble Devassy Chirammal 
Reviewed-on: http://review.gluster.org/12227
Tested-by: NetBSD Build System 
Reviewed-by: Prashanth Pai 
Reviewed-by: Humble Devassy Chirammal 
Tested-by: Humble Devassy Chirammal 
Tested-by: Raghavendra Talur

man or info page of gluster needs to be updated with self-heal commands

2015-09-07T09:13:34+00:00

Change-Id: I6f50f88e56d9d9a8f875c7edac28e2a023b65881
BUG: 1122395
Signed-off-by: Hari Gowtham 
Reviewed-on: http://review.gluster.org/12030
Reviewed-by: Ravishankar N 
Reviewed-by: Jeff Darcy 
Tested-by: NetBSD Build System 
Tested-by: Gluster Build System