Hi David,
> On 25-Feb-2020, at 3:45 AM, David Cunningham <dcunningham at
voisonics.com> wrote:
>
> Hello,
>
> I've a couple of questions on geo-replication that hopefully someone
can help with:
>
> 1. If there are multiple nodes in a cluster on the master side (pushing
updates to the geo-replication slave), which node actually does the pushing?
Does GlusterFS decide itself automatically?
Once Geo-replication session is started, one worker will be started
corresponding to each Master bricks. Each worker identifies the changes happened
in respective brick and sync those changes via Mount. This way load is
distributed among Master nodes. In case of Replica sub volume, one worker among
the Replica group will become active and participate in the syncing. Other
bricks in that Replica group will remain Passive. Passive worker will become
Active if the previously Active brick goes down (This is because all Replica
bricks will have the same set of changes, syncing from each worker is
redundant).
>
> 2.With regard to copying SSH keys, presumably the SSH key of all master
nodes should be authorized on the geo-replication client side?
Geo-replication session is established between one master node and one remote
node. If Geo-rep create command is successful then,
- SSH keys generated in all master nodes
- Public keys from all master nodes are copied to initiator Master node
- Public keys copied to the Remote node specified in the create command
- Master public keys are distributed to all nodes of remote Cluster and added to
respective ~/.ssh/authorized_keys
After successful Geo-rep create command, any Master node can connect to any
remote node via ssh.
Security: Command prefix is added while adding public key to remote node?s
authorized_keys file, So that if anyone gain access using this key can access
only gsyncd command.
```
command=gsyncd ssh-key?.
```
>
> Thanks for your help.
>
> --
> David Cunningham, Voisonics Limited
> http://voisonics.com/ <http://voisonics.com/>
> USA: +1 213 221 1092
> New Zealand: +64 (0)28 2558 3782
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?
regards
Aravinda Vishwanathapura
https://kadalu <https://kadalu/>.io
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