Re: geo replication, invalid slave name and gluster 3.5.1

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Hello Vishwanath

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...

So I followed the new documentation... let me show you what i have done and what is the final error message...


I have 3 servers node1, node2 and node3 with IPs 1.1.1.1, 1.1.1.2 and 1.1.1.3

I installed glusterfs-server and glusterfs-geo-replication on all 3 of them... I created replica volume called myvol1 and run the command

gluster system:: execute gsec_create

this created 4 files:
secret.pem
secret.pem.pub
tar_ssh.pem
tar_ssh.pem.pub

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.

So I connected to slave server installed glusterfs-server and glusterfs-geo-replication there too.

Started the glusterd and created a volume called myvol1_slave

Then I peer probed one of the masters with slave. This showed the volume in my master and peer appeared in peer status.

From here i run the command in your documentation

volume geo-replication myvol1 1.2.3.4::myvol1_slave create push-pem
Passwordless ssh login has not been setup with 1.2.3.4.
geo-replication command failed

In the secure log file i could see the connection though.

2014-07-15T13:26:56.083445+01:00 1testlab sshd[23905]: Set /proc/self/oom_score_adj to 0 2014-07-15T13:26:56.089423+01:00 1testlab sshd[23905]: Connection from 1.1.1.1 port 58351 2014-07-15T13:26:56.248687+01:00 1testlab sshd[23906]: Connection closed by 1.1.1.1

and in the logs of one of the masters

[2014-07-15 12:26:56.247667] E [glusterd-geo-rep.c:1889:glusterd_verify_slave] 0-: Not a valid slave [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. [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.

there is no log in the other masters in the cluster nor on slave..

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... http://irclog.perlgeek.de/gluster/2014-01-16 but again no answer or solution.

Thank you for your time and help.

Best regards,
Stefan

On 15/07/14 12:26, M S Vishwanath Bhat wrote:
On 15/07/14 15:08, Stefan Moravcik wrote:
Hello Guys,

I have been trying to set a geo replication in our glusterfs test environment and got a problem with a message "invalid slave name"

So first things first...

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...

Next step was to create a geo replication off site.. So i followed this documentation: http://www.gluster.org/community/documentation/index.php/HowTo:geo-replication
These are old docs. I have edited this to mention that it is old geo-rep docs.

Please refer to https://github.com/gluster/glusterfs/blob/master/doc/admin-guide/en-US/markdown/admin_distributed_geo_rep.md or https://medium.com/@msvbhat/distributed-geo-replication-in-glusterfs-ec95f4393c50 for latest distributed-geo-rep documentation.

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:

on master:
gluster volume geo-replication myvol1 1.2.3.4:/shared/myvol1_slave start

on master:
[2014-07-15 09:15:37.188701] E [glusterd-geo-rep.c:4083:glusterd_get_slave_info] 0-: Invalid slave name [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 [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. [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. [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

there are no logs on slave what so ever
I also tried different documentation with "create push-pem" got the very same problem as above...

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...

Tried to search for a solution and found this http://fpaste.org/114290/04117421/

It was different user with a very same problem... The issue was shown on IRC channel, but never answered..

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..
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.

Please follow new documentation and try once more.

HTH

Best Regards,
Vishwanath


Thank you and best regards,
Stefan





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