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
[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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