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<div class="moz-cite-prefix">On 15/07/14 18:13, Stefan Moravcik
wrote:<br>
</div>
<blockquote cite="mid:53C521F4.1050103@newsweaver.com" type="cite">Hello
Vishwanath
<br>
<br>
thank you for your quick reply but i have a follow up question if
it is ok... Maybe a different issue and i should open a new
thread, but i will try to continue to use this one...
<br>
<br>
So I followed the new documentation... let me show you what i have
done and what is the final error message...
<br>
<br>
<br>
I have 3 servers node1, node2 and node3 with IPs 1.1.1.1, 1.1.1.2
and 1.1.1.3
<br>
<br>
I installed glusterfs-server and glusterfs-geo-replication on all
3 of them... I created replica volume called myvol1 and run the
command
<br>
<br>
gluster system:: execute gsec_create
<br>
<br>
this created 4 files:
<br>
secret.pem
<br>
secret.pem.pub
<br>
tar_ssh.pem
<br>
tar_ssh.pem.pub
<br>
<br>
The pub file is different on all 3 nodes so I copied all 3
secret.pem.pub to slave authorized_keys. I tried to ssh directly
to slave server from all 3 nodes and got through with no problem.
<br>
<br>
So I connected to slave server installed glusterfs-server and
glusterfs-geo-replication there too.
<br>
<br>
Started the glusterd and created a volume called myvol1_slave
<br>
<br>
Then I peer probed one of the masters with slave. This showed the
volume in my master and peer appeared in peer status.
<br>
<br>
From here i run the command in your documentation
<br>
<br>
volume geo-replication myvol1 1.2.3.4::myvol1_slave create
push-pem
<br>
Passwordless ssh login has not been setup with 1.2.3.4.
<br>
geo-replication command failed
<br>
</blockquote>
Couple of things here.<br>
<br>
I believe it was not clear enough in the docs and I apologise for
that. But this is the prerequisite for dist-geo-rep.<br>
<br>
* <i>There should be a password-less ssh setup between at least one
node in master volume to one node in slave volume. The geo-rep
create command should be executed from this node which has
password-less ssh setup to slave.</i><br>
<br>
So in your case, you can setup a password less ssh between 1.1.1.1
(one master volume node) to 1.2.3.4 (one slave volume node). You can
use "ssh-keygen" and "ssh-copy-id" to do the same.<br>
After the above step is done, execute the "gluster system:: execute
gsec_create". You don't need to copy it to the slave autorized_keys.
geo-rep create push-pem takes care of it for you.<br>
<br>
Now, you should execute "gluster volume geo-rep myvol1
1.2.3.4::myvol1_slave cerate push-pem" from 1.1.1.1 (because this
node has passwordless ssh to 1.2.3.4 mentioned in the command)<br>
<br>
That should create a geo-rep session for you. That can be started
later on.<br>
<br>
And you don't need to peer probe slave from master or vice versa.
Logically both master and slave volumes are in different clusters
(in two different geographic locations).<br>
<br>
HTH,<br>
Vishwanath<br>
<br>
<blockquote cite="mid:53C521F4.1050103@newsweaver.com" type="cite">
<br>
In the secure log file i could see the connection though.
<br>
<br>
2014-07-15T13:26:56.083445+01:00 1testlab sshd[23905]: Set
/proc/self/oom_score_adj to 0
<br>
2014-07-15T13:26:56.089423+01:00 1testlab sshd[23905]: Connection
from 1.1.1.1 port 58351
<br>
2014-07-15T13:26:56.248687+01:00 1testlab sshd[23906]: Connection
closed by 1.1.1.1
<br>
<br>
and in the logs of one of the masters
<br>
<br>
[2014-07-15 12:26:56.247667] E
[glusterd-geo-rep.c:1889:glusterd_verify_slave] 0-: Not a valid
slave
<br>
[2014-07-15 12:26:56.247752] E
[glusterd-geo-rep.c:2106:glusterd_op_stage_gsync_create] 0-:
1.2.3.4::myvol1_slave is not a valid slave volume. Error:
Passwordless ssh login has not been setup with 1.2.3.4.
<br>
[2014-07-15 12:26:56.247772] E
[glusterd-syncop.c:912:gd_stage_op_phase] 0-management: Staging of
operation 'Volume Geo-replication Create' failed on localhost :
Passwordless ssh login has not been setup with 1.2.3.4.
<br>
<br>
there is no log in the other masters in the cluster nor on slave..
<br>
<br>
I even tried with force option, but same result... I disabled
firewall and selinux just to make sure those parts of the system
do not interfere. Searched a google for same problem and found
one... <a class="moz-txt-link-freetext" href="http://irclog.perlgeek.de/gluster/2014-01-16">http://irclog.perlgeek.de/gluster/2014-01-16</a> but again no
answer or solution.
<br>
<br>
Thank you for your time and help.
<br>
<br>
Best regards,
<br>
Stefan
<br>
<br>
On 15/07/14 12:26, M S Vishwanath Bhat wrote:
<br>
<blockquote type="cite">On 15/07/14 15:08, Stefan Moravcik wrote:
<br>
<blockquote type="cite">Hello Guys,
<br>
<br>
I have been trying to set a geo replication in our glusterfs
test environment and got a problem with a message "invalid
slave name"
<br>
<br>
So first things first...
<br>
<br>
I have 3 nodes configured in a cluster. Those nodes are
configured as replica. On this cluster I have a volume created
with let say name myvol1. So far everything works and looks
good...
<br>
<br>
Next step was to create a geo replication off site.. So i
followed this documentation:
<br>
<a class="moz-txt-link-freetext" href="http://www.gluster.org/community/documentation/index.php/HowTo:geo-replication">http://www.gluster.org/community/documentation/index.php/HowTo:geo-replication</a>
<br>
</blockquote>
These are old docs. I have edited this to mention that it is old
geo-rep docs.
<br>
<br>
Please refer to
<a class="moz-txt-link-freetext" href="https://github.com/gluster/glusterfs/blob/master/doc/admin-guide/en-US/markdown/admin_distributed_geo_rep.md">https://github.com/gluster/glusterfs/blob/master/doc/admin-guide/en-US/markdown/admin_distributed_geo_rep.md</a>
or
<a class="moz-txt-link-freetext" href="https://medium.com/@msvbhat/distributed-geo-replication-in-glusterfs-ec95f4393c50">https://medium.com/@msvbhat/distributed-geo-replication-in-glusterfs-ec95f4393c50</a>
for latest distributed-geo-rep documentation.
<br>
<blockquote type="cite">
<br>
I had peered the slave server, created secret.pem was able to
ssh without the password and tried to create the geo
replication volume with the code from the documentation and
got the following error:
<br>
<br>
on master:
<br>
gluster volume geo-replication myvol1
1.2.3.4:/shared/myvol1_slave start
<br>
<br>
on master:
<br>
[2014-07-15 09:15:37.188701] E
[glusterd-geo-rep.c:4083:glusterd_get_slave_info] 0-: Invalid
slave name
<br>
[2014-07-15 09:15:37.188827] W [dict.c:778:str_to_data]
(-->/usr/lib64/glusterfs/3.5.1/xlator/mgmt/glusterd.so(glusterd_op_stage_gsync_create+0x1e2)
[0x7f979e20f1f2]
(-->/usr/lib64/glusterfs/3.5.1/xlator/mgmt/glusterd.so(glusterd_get_slave_details_confpath+0x116)
[0x7f979e20a306]
(-->/usr/lib64/libglusterfs.so.0(dict_set_str+0x1c)
[0x7f97a322045c]))) 0-dict: value is NULL
<br>
[2014-07-15 09:15:37.188837] E
[glusterd-geo-rep.c:3995:glusterd_get_slave_details_confpath]
0-: Unable to store slave volume name.
<br>
[2014-07-15 09:15:37.188849] E
[glusterd-geo-rep.c:2056:glusterd_op_stage_gsync_create] 0-:
Unable to fetch slave or confpath details.
<br>
[2014-07-15 09:15:37.188861] E
[glusterd-syncop.c:912:gd_stage_op_phase] 0-management:
Staging of operation 'Volume Geo-replication Create' failed on
localhost
<br>
<br>
there are no logs on slave what so ever
<br>
I also tried different documentation with "create push-pem"
got the very same problem as above...
<br>
<br>
I tried to start the volume as node:/path/to/dir and also
created a volume on slave and started as
node:/slave_volume_name always a same result...
<br>
<br>
Tried to search for a solution and found this
<a class="moz-txt-link-freetext" href="http://fpaste.org/114290/04117421/">http://fpaste.org/114290/04117421/</a>
<br>
<br>
It was different user with a very same problem... The issue
was shown on IRC channel, but never answered..
<br>
<br>
This is a fresh install of 3.5.1, so no upgrade should be
needed i guess... Any help solving this problem would be
appreciated..
<br>
</blockquote>
From what you have described, it looks like your slave is not a
gluster volume. In latest geo-rep, slave has to be a gluster
volume. Now glusterfs does not support a simple directory as a
slave.
<br>
<br>
Please follow new documentation and try once more.
<br>
<br>
HTH
<br>
<br>
Best Regards,
<br>
Vishwanath
<br>
<br>
<blockquote type="cite">
<br>
Thank you and best regards,
<br>
Stefan
<br>
<br>
<br>
</blockquote>
<br>
</blockquote>
<br>
<br>
</blockquote>
<br>
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