On 07/16/2014 02:20 PM, Stefan Moravcik wrote:
Hello Vishwanath,
thanks for pointing me to right direction... This was helpful... I
thought the password less ssh connection was done from glusterfs using
the secret.pem in the initial run.. But wasn't.. I had to create the
id_rsa in the /root/.ssh/ directory to be able to ssh to slave without
any -i option...
Great, thanks for that... However i have additional question... Again
little bit different to the previous ones... This seems like a bug to
me.. But you for sure will know better.
After I created the geo-replication volume and i started it..
everything looked Ok and successful. Then i looked in the status
command and got this
MASTER NODE MASTER VOL MASTER BRICK
SLAVE STATUS CHECKPOINT STATUS CRAWL STATUS
---------------------------------------------------------------------------------------------------------------------------------------------
1.1.1.1 myvol1 /shared/myvol1 1.2.3.4::myvol1_slave faulty
N/A N/A
1.1.1.2 myvol1 /shared/myvol1 1.2.3.4::myvol1_slave faulty
N/A N/A
1.1.1.3 myvol1 /shared/myvol1 1.2.3.4::myvol1_slave faulty
N/A N/A
when i checked the config file there is
remote_gsyncd: /nonexistent/gsyncd
i even tried to create symlinks for this but faulty status has never
gone away... Found a bug report on bugzilla
https://bugzilla.redhat.com/show_bug.cgi?id=1105283
Update conf file manually as following and stop and start the
geo-replication.(Conf file location:
/var/lib/glusterd/geo-replication/<MASTER VOL>_<SLAVE IP_SLAVE
VOL>/gsyncd.conf)
remote_gsyncd = /usr/libexec/glusterfs/gsyncd
Let us know if this resolves the issue.
--
regards
Aravinda
http://aravindavk.in
[2014-07-16 07:14:34.718718] E
[glusterd-geo-rep.c:2685:glusterd_gsync_read_frm_status] 0-: Unable to
read gsyncd status file
[2014-07-16 07:14:34.718756] E
[glusterd-geo-rep.c:2999:glusterd_read_status_file] 0-: Unable to read
the statusfile for /shared/myvol1 brick for repository(master),
1.2.3.4::myvol1_slave(slave) session
However since the symlink is in place the error message above won't
show in the log.. Actually there are no more error logs just faulty
status...
Even more interesting. When i changed the configuration from rsync to
tar+ssh it synced the files there, but will not replicate any changes
or new files created....
MASTER NODE MASTER VOL MASTER BRICK
SLAVE STATUS CHECKPOINT STATUS CRAWL
STATUS FILES SYNCD FILES PENDING BYTES PENDING DELETES
PENDING FILES SKIPPED
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1.1.1.1 myvol1 /shared/myvol1 1.2.3.4::myvol1_slave faulty
N/A N/A 10001 0
0 0 0
1.1.1.2 myvol1 /shared/myvol1 1.2.3.4::myvol1_slave faulty
N/A N/A 0 0
0 0 0
1.1.1.3 myvol1 /shared/myvol1 1.2.3.4::myvol1_slave faulty
N/A N/A 0 0
0 0 0
as you can see, 10001 files replicated... but if i create a new one or
edit the existing ones, the faulty status will not replicate anymore..
This is true even if i change back from tar+ssh to rsync or restart
glusterd or anything...
Thank you for all your help, much appreciated
Regards,
Stefan
On 15/07/14 17:15, M S Vishwanath Bhat wrote:
On 15/07/14 18:13, Stefan Moravcik wrote:
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
Couple of things here.
I believe it was not clear enough in the docs and I apologise for
that. But this is the prerequisite for dist-geo-rep.
* /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./
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.
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.
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)
That should create a geo-rep session for you. That can be started
later on.
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).
HTH,
Vishwanath
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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