Re: Change IP address (on 3.11.14)

[Lapo Luchini]

On 2022-12-06 14:21, Gábor Auth wrote:
No! Just start it and the other nodes in the cluster will acknowledge 
the new IP, they recognize the node by id, stored in the data folder of 
the node.


Thanks Gábor and Erick!

It worked flawlessly.

--
Lapo Luchini
l...@lapo.it

Re: Change IP address (on 3.11.14)

[Gábor Auth]

Hi,

On Tue, Dec 6, 2022 at 12:41 PM Lapo Luchini  wrote:

> I'm trying to change IP address of an existing live node (possibly
> without deleting data and streaming terabytes all over again) following
> these steps:

https://stackoverflow.com/a/57455035/166524
> 1. echo 'auto_bootstrap: false' >> cassandra.yaml
> 2. add "-Dcassandra.replace_address=oldAddress" in cassandra-env.sh
> 3. restart node
>

As I know, you need to change the IP address like this only, when the node
data vanished and need to tell the cluster the replaced IP of the vanished
node.

Or should I delete all the DB on disk and bootstrap from scratch?
>

No! Just start it and the other nodes in the cluster will acknowledge the
new IP, they recognize the node by id, stored in the data folder of the
node.

-- 
Bye,
Auth Gábor (https://iotguru.cloud)

Re: Change IP address (on 3.11.14)

[Erick Ramirez]

If (a) the node is part of the cluster, and (b) is running and operational,
then (c) the cluster will recognise that the node has a new IP when you
restart the node and there's nothing to do on the C* side.

A new IP will be handled by C* automatically. Think of situations where a
node experiences a hardware failure and you move the data disk to a new
server which has a new IP. When you start C* on that node, it will be
recognised as an existing node and that's normal. Cheers!

Change IP address (on 3.11.14)

[Lapo Luchini]

Hi all,
I'm trying to change IP address of an existing live node (possibly 
without deleting data and streaming terabytes all over again) following 
these steps:


https://stackoverflow.com/a/57455035/166524
1. echo 'auto_bootstrap: false' >> cassandra.yaml
2. add "-Dcassandra.replace_address=oldAddress" in cassandra-env.sh
3. restart node

But I get this error:

  Cannot replace address with a node that is already bootstrapped

So I guess that answer is outdated for 3.11.
(or was always wrong, given it is from 2019?)

Is there a way to do it?
Or should I delete all the DB on disk and bootstrap from scratch?

thanks,

--
Lapo Luchini
l...@lapo.it