Re: Setting up geo replication with GlusterFS 3.6.5

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Thanks for your detailed example. Based on that it looks like my issue is SSH based. Now I have the following two SSH related questions:

1) The setup of a SSH passwordless account on the slave, does it need to be using the same SSH public key as stored by GlusterFS in the 
/var/lib/glusterd/geo-replication directory? or can I simply generate my own with ssh-keygen?

2) is it possible to use another user than root for geo-replication with GlusterFS v3.6?

Regards
ML



On Tuesday, September 15, 2015 9:16 AM, Saravanakumar Arumugam <sarumuga@xxxxxxxxxx> wrote:
Hi,
You are right,   This tool may not be compatible with 3.6.5.

I have tried myself with 3.6.5, but faced this error.
==========================
georepsetup tv1 gfvm3 tv2
Geo-replication session will be established between tv1 and gfvm3::tv2
Root password of gfvm3 is required to complete the setup. NOTE: Password 
will not be stored.

root@gfvm3's password:
[    OK] gfvm3 is Reachable(Port 22)
[    OK] SSH Connection established root@gfvm3
[    OK] Master Volume and Slave Volume are compatible (Version: 3.6.5)
[    OK] Common secret pub file present at 
/var/lib/glusterd/geo-replication/common_secret.pem.pub
[    OK] common_secret.pem.pub file copied to gfvm3
[    OK] Master SSH Keys copied to all Up Slave nodes
[    OK] Updated Master SSH Keys to all Up Slave nodes authorized_keys file
[NOT OK] Failed to Establish Geo-replication Session
Command type not found while handling geo-replication options
[root@gfvm3 georepsetup]#
==========================
So, some more changes required in this tool.


Coming back to your question:

I have setup geo-replication using the commands in 3.6.5.
Please recheck all the commands (with necessary changes at your end).

====================================================================
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]# cat /etc/redhat-release
Fedora release 21 (Twenty One)
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]# rpm -qa | grep glusterfs
glusterfs-devel-3.6.5-1.fc21.x86_64
glusterfs-3.6.5-1.fc21.x86_64
glusterfs-rdma-3.6.5-1.fc21.x86_64
glusterfs-fuse-3.6.5-1.fc21.x86_64
glusterfs-server-3.6.5-1.fc21.x86_64
glusterfs-debuginfo-3.6.5-1.fc21.x86_64
glusterfs-libs-3.6.5-1.fc21.x86_64
glusterfs-extra-xlators-3.6.5-1.fc21.x86_64
glusterfs-geo-replication-3.6.5-1.fc21.x86_64
glusterfs-api-3.6.5-1.fc21.x86_64
glusterfs-api-devel-3.6.5-1.fc21.x86_64
glusterfs-cli-3.6.5-1.fc21.x86_64
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]# service glusterd start
Redirecting to /bin/systemctl start  glusterd.service
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]# service glusterd status
Redirecting to /bin/systemctl status  glusterd.service
● glusterd.service - GlusterFS, a clustered file-system server
    Loaded: loaded (/usr/lib/systemd/system/glusterd.service; disabled)
    Active: active (running) since Tue 2015-09-15 12:19:32 IST; 4s ago
   Process: 2778 ExecStart=/usr/sbin/glusterd -p /var/run/glusterd.pid 
(code=exited, status=0/SUCCESS)
  Main PID: 2779 (glusterd)
    CGroup: /system.slice/glusterd.service
            └─2779 /usr/sbin/glusterd -p /var/run/glusterd.pid
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]# ps aux | grep glus
root      2779  0.0  0.4 448208 17288 ?        Ssl  12:19   0:00 
/usr/sbin/glusterd -p /var/run/glusterd.pid
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]# gluster volume create tv1 
gfvm3:/opt/volume_test/tv_1/b1 gfvm3:/opt/volume_test/tv_1/b2 force
volume create: tv1: success: please start the volume to access data
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]# gluster volume create tv2 
gfvm3:/opt/volume_test/tv_2/b1 gfvm3:/opt/volume_test/tv_2/b2 force
volume create: tv2: success: please start the volume to access data
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]#  gluster volume start tv1
volume start: tv1: success
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]# gluster volume start tv2
volume start: tv2: success
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]# mount -t glusterfs gfvm3:/tv1 /mnt/master/
[root@gfvm3 georepsetup]# mount -t glusterfs gfvm3:/tv2 /mnt/slave/
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]# gluster system:: execute gsec_create
Common secret pub file present at 
/var/lib/glusterd/geo-replication/common_secret.pem.pub
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]# gluster volume geo-replication tv1 gfvm3::tv2 
create push-pem
Creating geo-replication session between tv1 & gfvm3::tv2 has been 
successful
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]# gluster volume geo-replication tv1 gfvm3::tv2 
start
Starting geo-replication session between tv1 & gfvm3::tv2 has been 
successful
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]# gluster volume geo-replication tv1 gfvm3::tv2 
status

MASTER NODE    MASTER VOL    MASTER BRICK SLAVE        
STATUS             CHECKPOINT STATUS    CRAWL STATUS
----------------------------------------------------------------------------------------------------------------------------
gfvm3          tv1           /opt/volume_test/tv_1/b1 gfvm3::tv2    
Initializing...    N/A N/A
gfvm3          tv1           /opt/volume_test/tv_1/b2 gfvm3::tv2    
Initializing...    N/A N/A
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]# gluster volume geo-replication tv1 gfvm3::tv2 
status

MASTER NODE    MASTER VOL    MASTER BRICK SLAVE         STATUS    
CHECKPOINT STATUS    CRAWL STATUS
----------------------------------------------------------------------------------------------------------------------
gfvm3          tv1           /opt/volume_test/tv_1/b1 gfvm3::tv2    
Active    N/A                  Changelog Crawl
gfvm3          tv1           /opt/volume_test/tv_1/b2 gfvm3::tv2    
Active    N/A                  Changelog Crawl
[root@gfvm3 georepsetup]#
[root@gfvm3 georepsetup]# cp /etc/hosts
hosts        hosts.allow  hosts.deny
[root@gfvm3 georepsetup]# cp /etc/hosts* /mnt/master; sleep 20; ls 
/mnt/slave/
hosts  hosts.allow  hosts.deny
[root@gfvm3 georepsetup]# ls /mnt/master
hosts  hosts.allow  hosts.deny
[root@gfvm3 georepsetup]# ls /mnt/slave/
hosts  hosts.allow  hosts.deny
[root@gfvm3 georepsetup]#
====================================================================
One important step which I have NOT mentioned is you need to setup 
passwordless ssh.

You need to use ssh-keygen and ssh-copy-id for having passwordless setup 
from one node in Master to one node in Slave.
This needs to be carried out before this step: " gluster system:: 
execute gsec_create"
This needs to be done at the same NODE(at Master) where you execute 
geo-rep create command.

You can find geo-replication related logs here 
:/var/log/glusterfs/geo-replication/
Please share the logs if you still face any issues.

Thanks,
Saravana


On 09/14/2015 11:23 PM, ML mail wrote:
> Yes I can ping the slave node with it's name and IP address, I've even entered manually its name in /etc/hosts.
>
> Does this nice python script also work for Gluster 3.6? The blog post only speaks about 3.7...
>
> Regards
> ML
>
>
>
>
> On Monday, September 14, 2015 9:38 AM, Saravanakumar Arumugam <sarumuga@xxxxxxxxxx> wrote:
> Hi,
>
> << Unable to fetch slave volume details. Please check the slave cluster
> and slave volume. geo-replication command failed
> Have you checked whether you are able to reach the Slave node from the
> master node?
>
> There is a super simple way of setting up geo-rep written by Aravinda.
> Refer:
> http://blog.gluster.org/2015/09/introducing-georepsetup-gluster-geo-replication-setup-tool-2/
>
> Refer the README for both usual (root user based) and
> mountbroker(non-root) setup details here:
> https://github.com/aravindavk/georepsetup/blob/master/README.md
>
> Thanks,
> Saravana
>
>
>
> On 09/13/2015 09:46 PM, ML mail wrote:
>> Hello,
>>
>> I am using the following documentation in order to setup geo replication between two sites
>> http://www.gluster.org/pipermail/gluster-users.old/2015-January/020080.html
>>
>> Unfortunately the step:
>>
>> gluster volume geo-replication myvolume gfsgeo@xxxxxxxxxxxxxxxxxx::myvolume create push-pem
>>
>> Fails with the following error:
>>
>> Unable to fetch slave volume details. Please check the slave cluster and slave volume.
>> geo-replication command failed
>>
>> Any ideas?
>>
>> btw: the documentation
>> http://gluster.readthedocs.org/en/latest/Administrator%20Guide/Geo%20Replication/index.html
>>    does not seem to work with GlusterFS 3.6.5 that's why I am using the other mentioned documentation. It fails at the mountbroker step (
>> gluster system:: execute mountbroker opt mountbroker-root /var/mountbroker-root)
>>
>> Regards
>> ML
>> _______________________________________________
>> Gluster-users mailing list
>> Gluster-users@xxxxxxxxxxx
>> http://www.gluster.org/mailman/listinfo/gluster-users

> _______________________________________________
> Gluster-users mailing list
> Gluster-users@xxxxxxxxxxx
> http://www.gluster.org/mailman/listinfo/gluster-users
_______________________________________________
Gluster-users mailing list
Gluster-users@xxxxxxxxxxx
http://www.gluster.org/mailman/listinfo/gluster-users




[Index of Archives]     [Gluster Development]     [Linux Filesytems Development]     [Linux ARM Kernel]     [Linux ARM]     [Linux Omap]     [Fedora ARM]     [IETF Annouce]     [Bugtraq]     [Linux OMAP]     [Linux MIPS]     [eCos]     [Asterisk Internet PBX]     [Linux API]

  Powered by Linux