Re: [ceph-users] How to really change public network in ceph

[David Turner]

Osds can change their IP every time they start. When they start and check
in with the mons, they tell the mons where they are.  Changing your public
network requires restarting every daemon. Likely you will want to schedule
downtime for this. Clients can be routed and on whatever subnet you want,
but osds and mons should be on the same subnet.

On Wed, Feb 21, 2018, 6:27 AM Mario Giammarco  wrote:

> I try to ask a simpler question: when I change monitors network and the
> network of osds, how can monitors know the new addresses of osds?
> Thanks,
> Mario
>
> 2018-02-19 10:22 GMT+01:00 Mario Giammarco :
>
>> Hello,
>> I have a test proxmox/ceph cluster with four servers.
>> I need to change the ceph public subnet from 10.1.0.0/24 to 10.1.5.0/24.
>> I have read documentation and tutorials.
>> The most critical part seems monitor map editing.
>> But it seems to me that osds need to bind to new subnet too.
>> I tried to put 10.1.0 and 10.1.5 subnets to public but it seems it
>> changes nothing.
>> Infact official documentation is unclear: it says you can put in public
>> network more than one subnet. It says they must be routed. But it does not
>> say what happens when you use multiple subnets or why you should do it.
>>
>> So I need help on these questions:
>> - exact sequence of operations to change public network in ceph (not only
>> monitors, also osds)
>> - details on multiple subnets in public networks in ceph
>>
>> Thanks in advance for any help,
>> Mario
>>
>
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Re: [ceph-users] How to really change public network in ceph

[Mario Giammarco]

I try to ask a simpler question: when I change monitors network and the
network of osds, how can monitors know the new addresses of osds?
Thanks,
Mario

2018-02-19 10:22 GMT+01:00 Mario Giammarco :

> Hello,
> I have a test proxmox/ceph cluster with four servers.
> I need to change the ceph public subnet from 10.1.0.0/24 to 10.1.5.0/24.
> I have read documentation and tutorials.
> The most critical part seems monitor map editing.
> But it seems to me that osds need to bind to new subnet too.
> I tried to put 10.1.0 and 10.1.5 subnets to public but it seems it changes
> nothing.
> Infact official documentation is unclear: it says you can put in public
> network more than one subnet. It says they must be routed. But it does not
> say what happens when you use multiple subnets or why you should do it.
>
> So I need help on these questions:
> - exact sequence of operations to change public network in ceph (not only
> monitors, also osds)
> - details on multiple subnets in public networks in ceph
>
> Thanks in advance for any help,
> Mario
>
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[ceph-users] How to really change public network in ceph

[Mario Giammarco]

Hello,
I have a test proxmox/ceph cluster with four servers.
I need to change the ceph public subnet from 10.1.0.0/24 to 10.1.5.0/24.
I have read documentation and tutorials.
The most critical part seems monitor map editing.
But it seems to me that osds need to bind to new subnet too.
I tried to put 10.1.0 and 10.1.5 subnets to public but it seems it changes
nothing.
Infact official documentation is unclear: it says you can put in public
network more than one subnet. It says they must be routed. But it does not
say what happens when you use multiple subnets or why you should do it.

So I need help on these questions:
- exact sequence of operations to change public network in ceph (not only
monitors, also osds)
- details on multiple subnets in public networks in ceph

Thanks in advance for any help,
Mario
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