[Gluster-users] geo replication, invalid slave name and gluster 3.5.1
Stefan Moravcik
smoravcik at newsweaver.com
Tue Jul 22 06:53:40 UTC 2014
Hello,
I have deleted all the /var/lib/glusterd files and directories on slave
and did all the steps once again and it worked... I was not able to
replicate the problem with faulty slave anymore...
I am not sure what was the problem but I think it was one of the old
steps from previous geo documentations. Maybe a value in the config that
broke the status and the replication... So after a clean up and doing
everything from scratch, the new documentation worked well... Thanks again
Best regards,
Stefan
On 17/07/14 13:18, Aravinda wrote:
> 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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