[Gluster-users] Removing subvolume from dist/rep volume

[Nithya Balachandran]

On Fri, 28 Jun 2019 at 14:34, Dave Sherohman <dave at sherohman.org> wrote:

> On Thu, Jun 27, 2019 at 12:17:10PM +0530, Nithya Balachandran wrote:
> > On Tue, 25 Jun 2019 at 15:26, Dave Sherohman <dave at sherohman.org> wrote:
> > > My objective is to remove nodes B and C entirely.
> > >
> > > First up is to pull their bricks from the volume:
> > >
> > > # gluster volume remove-brick myvol B:/data C:/data A:/arb1 start
> > > (wait for data to be migrated)
> > > # gluster volume remove-brick myvol B:/data C:/data A:/arb1 commit
> > >
> > >
> > There are some edge cases that may prevent a file from being migrated
> > during a remove-brick. Please do the following after this:
> >
> >    1. Check the remove-brick status for any failures.  If there are any,
> >    check the rebalance log file for errors.
> >    2. Even if there are no failures, check the removed bricks to see if
> any
> >    files have not been migrated. If there are any, please check that
> they are
> >    valid files on the brick and copy them to the volume from the brick
> to the
> >    mount point.
> >
> > The rest of the steps look good.
>
> Apparently, they weren't quite right.  I tried it and it just gives me
> the usage notes in return.  Transcript of the commands and output is below.
>
> Any insight on how I got the syntax wrong?
>
> --- cut here ---
> root at merlin:/# gluster volume status
> Status of volume: palantir
> Gluster process                             TCP Port  RDMA Port  Online
> Pid
>
> ------------------------------------------------------------------------------
> Brick saruman:/var/local/brick0/data        49153     0          Y
>  17995
> Brick gandalf:/var/local/brick0/data        49153     0          Y
>  9415
> Brick merlin:/var/local/arbiter1/data       49170     0          Y
>  35034
> Brick azathoth:/var/local/brick0/data       49153     0          Y
>  25312
> Brick yog-sothoth:/var/local/brick0/data    49152     0          Y
>  10671
> Brick merlin:/var/local/arbiter2/data       49171     0          Y
>  35043
> Brick cthulhu:/var/local/brick0/data        49153     0          Y
>  21925
> Brick mordiggian:/var/local/brick0/data     49152     0          Y
>  12368
> Brick merlin:/var/local/arbiter3/data       49172     0          Y
>  35050
> Self-heal Daemon on localhost               N/A       N/A        Y
>  1209
> Self-heal Daemon on saruman.lub.lu.se       N/A       N/A        Y
>  23253
> Self-heal Daemon on gandalf.lub.lu.se       N/A       N/A        Y
>  9542
> Self-heal Daemon on mordiggian.lub.lu.se    N/A       N/A        Y
>  11016
> Self-heal Daemon on yog-sothoth.lub.lu.se   N/A       N/A        Y
>  8126
> Self-heal Daemon on cthulhu.lub.lu.se       N/A       N/A        Y
>  30998
> Self-heal Daemon on azathoth.lub.lu.se      N/A       N/A        Y
>  34399
>
> Task Status of Volume palantir
>
> ------------------------------------------------------------------------------
> Task                 : Rebalance
> ID                   : e58bc091-5809-4364-af83-2b89bc5c7106
> Status               : completed
>
> root at merlin:/# gluster volume remove-brick palantir
> saruman:/var/local/brick0/data gandalf:/var/local/brick0/data
> merlin:/var/local/arbiter1/data
>
>

You had it  right in the first email.

 gluster volume remove-brick palantir replica 3 arbiter 1
saruman:/var/local/brick0/data gandalf:/var/local/brick0/data
merlin:/var/local/arbiter1/data *start*


Usage:
> volume remove-brick <VOLNAME> [replica <COUNT>] <BRICK> ...
> <start|stop|status|commit|force>
>
> root at merlin:/# gluster volume remove-brick palantir replica 3 arbiter 1
> saruman:/var/local/brick0/data gandalf:/var/local/brick0/data
> merlin:/var/local/arbiter1/data
>
> Usage:
> volume remove-brick <VOLNAME> [replica <COUNT>] <BRICK> ...
> <start|stop|status|commit|force>
>
> root at merlin:/# gluster volume remove-brick palantir replica 3
> saruman:/var/local/brick0/data gandalf:/var/local/brick0/data
> merlin:/var/local/arbiter1/data
>
> Usage:
> volume remove-brick <VOLNAME> [replica <COUNT>] <BRICK> ...
> <start|stop|status|commit|force>
> --- cut here ---
>
> --
> Dave Sherohman
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