Stefano Bagnara
2018-Feb-07 10:51 UTC
[Gluster-users] add geo-replication "passive" node after node replacement
Hi all,
i had a replica 2 gluster 3.12 between S1 and S2 (1 brick per node)
geo-replicated to S5 where both S1 and S2 were visible in the
geo-replication status and S2 "active" while S1 "passive".
I had to replace S1 with S3, so I did an
"add-brick replica 3 S3"
and then
"remove-brick replica 2 S1".
Now I have again a replica 2 gluster between S3 and S2 but the
geo-replica only show S2 as active and no other peer involved. So it
seems S3 does not know about the geo-replica and it is not ready to
geo-replicate in case S2 goes down.
Here was the original geo-rep status
# gluster volume geo-replication status
MASTER NODE MASTER VOL MASTER BRICK SLAVE USER SLAVE
SLAVE NODE STATUS CRAWL STATUS
LAST_SYNCED
----------------------------------------------------------------------------------------------------------------------------------------------------------------
S2 sharedvol /home/sharedvol root
ssh://S5::sharedvolslave S5 Passive N/A N/A
S1 sharedvol /home/sharedvol root
ssh://S5::sharedvolslave S5 Active Changelog Crawl
2018-02-07 10:18:57
Here is the new geo-replication stauts
# gluster volume geo-replication status
MASTER NODE MASTER VOL MASTER BRICK SLAVE USER SLAVE
SLAVE NODE STATUS CRAWL STATUS
LAST_SYNCED
---------------------------------------------------------------------------------------------------------------------------------------------------------------
S2 sharedvol /home/sharedvol root
ssh://S5::sharedvolslave S5 Active Changelog Crawl
2018-02-07 11:48:31
How can I add S3 as a passive node in the geo-replica to S5 ??
Thank you,
Stefano
Kotresh Hiremath Ravishankar
2018-Feb-07 13:42 UTC
[Gluster-users] add geo-replication "passive" node after node replacement
Hi,
When S3 is added to master volume from new node, the following cmd should
be run to generate and distribute ssh keys
1. Generate ssh keys from new node
#gluster system:: execute gsec_create
2. Push those ssh keys of new node to slave
#gluster vol geo-rep <mastervol> <slavehost>::<slavevol>
create
push-pem force
3. Stop and start geo-rep
But note that while removing brick and adding a brick, you should make sure
the data from the brick being removed is synced
to slave.
Thanks,
Kotresh HR
On Wed, Feb 7, 2018 at 4:21 PM, Stefano Bagnara <lists at bago.org> wrote:
> Hi all,
>
> i had a replica 2 gluster 3.12 between S1 and S2 (1 brick per node)
> geo-replicated to S5 where both S1 and S2 were visible in the
> geo-replication status and S2 "active" while S1
"passive".
>
> I had to replace S1 with S3, so I did an
> "add-brick replica 3 S3"
> and then
> "remove-brick replica 2 S1".
>
> Now I have again a replica 2 gluster between S3 and S2 but the
> geo-replica only show S2 as active and no other peer involved. So it
> seems S3 does not know about the geo-replica and it is not ready to
> geo-replicate in case S2 goes down.
>
> Here was the original geo-rep status
>
> # gluster volume geo-replication status
>
> MASTER NODE MASTER VOL MASTER BRICK SLAVE USER SLAVE
> SLAVE NODE STATUS CRAWL STATUS
> LAST_SYNCED
> ------------------------------------------------------------
> ------------------------------------------------------------
> ----------------------------------------
> S2 sharedvol /home/sharedvol root
> ssh://S5::sharedvolslave S5 Passive N/A N/A
> S1 sharedvol /home/sharedvol root
> ssh://S5::sharedvolslave S5 Active Changelog Crawl
> 2018-02-07 10:18:57
>
> Here is the new geo-replication stauts
>
> # gluster volume geo-replication status
>
> MASTER NODE MASTER VOL MASTER BRICK SLAVE USER SLAVE
> SLAVE NODE STATUS CRAWL STATUS
> LAST_SYNCED
> ------------------------------------------------------------
> ------------------------------------------------------------
> ---------------------------------------
> S2 sharedvol /home/sharedvol root
> ssh://S5::sharedvolslave S5 Active Changelog Crawl
> 2018-02-07 11:48:31
>
>
> How can I add S3 as a passive node in the geo-replica to S5 ??
>
> Thank you,
> Stefano
> _______________________________________________
> Gluster-users mailing list
> Gluster-users at gluster.org
> http://lists.gluster.org/mailman/listinfo/gluster-users
>
--
Thanks and Regards,
Kotresh H R
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Stefano Bagnara
2018-Feb-07 14:26 UTC
[Gluster-users] add geo-replication "passive" node after node replacement
OK step 1 and 2 worked fine. About step 3 I had to use "stop force" otherwise staging failed because S3 didn't know about the replica and refused to stop it. Thank you Kotresh, Stefano On 7 February 2018 at 14:42, Kotresh Hiremath Ravishankar <khiremat at redhat.com> wrote:> Hi, > > When S3 is added to master volume from new node, the following cmd should be > run to generate and distribute ssh keys > > 1. Generate ssh keys from new node > > #gluster system:: execute gsec_create > > 2. Push those ssh keys of new node to slave > > #gluster vol geo-rep <mastervol> <slavehost>::<slavevol> create > push-pem force > > 3. Stop and start geo-rep > > > But note that while removing brick and adding a brick, you should make sure > the data from the brick being removed is synced > to slave. > > Thanks, > Kotresh HR > > > > > > On Wed, Feb 7, 2018 at 4:21 PM, Stefano Bagnara <lists at bago.org> wrote: >> >> Hi all, >> >> i had a replica 2 gluster 3.12 between S1 and S2 (1 brick per node) >> geo-replicated to S5 where both S1 and S2 were visible in the >> geo-replication status and S2 "active" while S1 "passive". >> >> I had to replace S1 with S3, so I did an >> "add-brick replica 3 S3" >> and then >> "remove-brick replica 2 S1". >> >> Now I have again a replica 2 gluster between S3 and S2 but the >> geo-replica only show S2 as active and no other peer involved. So it >> seems S3 does not know about the geo-replica and it is not ready to >> geo-replicate in case S2 goes down. >> >> Here was the original geo-rep status >> >> # gluster volume geo-replication status >> >> MASTER NODE MASTER VOL MASTER BRICK SLAVE USER SLAVE >> SLAVE NODE STATUS CRAWL STATUS >> LAST_SYNCED >> >> ---------------------------------------------------------------------------------------------------------------------------------------------------------------- >> S2 sharedvol /home/sharedvol root >> ssh://S5::sharedvolslave S5 Passive N/A N/A >> S1 sharedvol /home/sharedvol root >> ssh://S5::sharedvolslave S5 Active Changelog Crawl >> 2018-02-07 10:18:57 >> >> Here is the new geo-replication stauts >> >> # gluster volume geo-replication status >> >> MASTER NODE MASTER VOL MASTER BRICK SLAVE USER SLAVE >> SLAVE NODE STATUS CRAWL STATUS >> LAST_SYNCED >> >> --------------------------------------------------------------------------------------------------------------------------------------------------------------- >> S2 sharedvol /home/sharedvol root >> ssh://S5::sharedvolslave S5 Active Changelog Crawl >> 2018-02-07 11:48:31 >> >> >> How can I add S3 as a passive node in the geo-replica to S5 ?? >> >> Thank you, >> Stefano >> _______________________________________________ >> Gluster-users mailing list >> Gluster-users at gluster.org >> http://lists.gluster.org/mailman/listinfo/gluster-users > > > > > -- > Thanks and Regards, > Kotresh H R