Re: How to move/replace management server?

[Ron Wheeler]

Would this be a nice short note for the Wiki?

Ron

On 26/03/2018 11:18 AM, Martin Emrich wrote:

Hi!

Took some time to get some hardware to test, but it basically worked 
so far (Migrating DB to new host, and setting up an additional MS on 
the new host):


* Stop old MS

* cloudstack-configure-databases on the new host

* dump databases "cloud" and "cloud_usage" on old host

* stop database on old host

* import databases on new host

* edit db.properties on old host (db.*.host, db.*.slaves)

* start MS on old host, works fine with the DB on the other host

* configure-cloudstack-management on the new host

* new MS works, too.

Awesome :)

Cheers,

Martin


Am 02.03.18 um 18:37 schrieb Paul Angus:
You can force the issue by stopping the all mgmt. servers, setting 
the management_server_id of the hosts in the host table to NULL when 
setting the old host to removed then restarting the new mgmt. server.


It's generally best practice to keep your mysql and mgmt. servers on 
separate hosts to make life easier when moving stuff around (like now).


paul.an...@shapeblue.com
www.shapeblue.com
53 Chandos Place, Covent Garden, London  WC2N 4HSUK
@shapeblue


-Original Message-
From: Martin Emrich <martin.emr...@empolis.com>
Sent: 02 March 2018 14:15
To: users@cloudstack.apache.org
Subject: Re: How to move/replace management server?

Hi!


Am 02.03.18 um 10:49 schrieb Paul Angus:

Hi Martin,

At a high level, what I would recommend doing, is building a new 
management host on CentOS7, add it as an additional management 
server.  Update the 'host' entry in the global settings to point to 
the new host.  And then mark the original management server as 
removed (by setting a date in the removed field in the database).
Thanks, so I basically upgrade from a single-node-setup to a cluster, 
wait a day or so for all components to "learn" that there is a new 
guy in town, and then remove the old node? Sounds reasonable...

This assumes your database is on a separate VM/host.
The DB is running on the same host, but migrating it should be easy 
beforehand.


Thanks

Martin






--
Ron Wheeler
President
Artifact Software Inc
email: rwhee...@artifact-software.com
skype: ronaldmwheeler
phone: 866-970-2435, ext 102

Re: How to move/replace management server?

[Martin Emrich]

Hi!

Took some time to get some hardware to test, but it basically worked so 
far (Migrating DB to new host, and setting up an additional MS on the 
new host):


* Stop old MS

* cloudstack-configure-databases on the new host

* dump databases "cloud" and "cloud_usage" on old host

* stop database on old host

* import databases on new host

* edit db.properties on old host (db.*.host, db.*.slaves)

* start MS on old host, works fine with the DB on the other host

* configure-cloudstack-management on the new host

* new MS works, too.

Awesome :)

Cheers,

Martin


Am 02.03.18 um 18:37 schrieb Paul Angus:

You can force the issue by stopping the all mgmt. servers, setting the 
management_server_id of the hosts in the host table to NULL when setting the 
old host to removed then restarting the new mgmt. server.

It's generally best practice to keep your mysql and mgmt. servers on separate 
hosts to make life easier when moving stuff around (like now).

paul.an...@shapeblue.com
www.shapeblue.com
53 Chandos Place, Covent Garden, London  WC2N 4HSUK
@shapeblue
   
  



-Original Message-
From: Martin Emrich <martin.emr...@empolis.com>
Sent: 02 March 2018 14:15
To: users@cloudstack.apache.org
Subject: Re: How to move/replace management server?

Hi!


Am 02.03.18 um 10:49 schrieb Paul Angus:

Hi Martin,

At a high level, what I would recommend doing, is building a new management 
host on CentOS7, add it as an additional management server.  Update the 'host' 
entry in the global settings to point to the new host.  And then mark the 
original management server as removed (by setting a date in the removed field 
in the database).

Thanks, so I basically upgrade from a single-node-setup to a cluster, wait a day or so 
for all components to "learn" that there is a new guy in town, and then remove 
the old node? Sounds reasonable...

This assumes your database is on a separate VM/host.

The DB is running on the same host, but migrating it should be easy beforehand.

Thanks

Martin

RE: How to move/replace management server?

[Paul Angus]

You can force the issue by stopping the all mgmt. servers, setting the 
management_server_id of the hosts in the host table to NULL when setting the 
old host to removed then restarting the new mgmt. server.

It's generally best practice to keep your mysql and mgmt. servers on separate 
hosts to make life easier when moving stuff around (like now). 

paul.an...@shapeblue.com 
www.shapeblue.com
53 Chandos Place, Covent Garden, London  WC2N 4HSUK
@shapeblue
  
 


-Original Message-
From: Martin Emrich <martin.emr...@empolis.com> 
Sent: 02 March 2018 14:15
To: users@cloudstack.apache.org
Subject: Re: How to move/replace management server?

Hi!


Am 02.03.18 um 10:49 schrieb Paul Angus:
> Hi Martin,
>
> At a high level, what I would recommend doing, is building a new management 
> host on CentOS7, add it as an additional management server.  Update the 
> 'host' entry in the global settings to point to the new host.  And then mark 
> the original management server as removed (by setting a date in the removed 
> field in the database).
Thanks, so I basically upgrade from a single-node-setup to a cluster, wait a 
day or so for all components to "learn" that there is a new guy in town, and 
then remove the old node? Sounds reasonable...
> This assumes your database is on a separate VM/host.
The DB is running on the same host, but migrating it should be easy beforehand.

Thanks

Martin

Re: How to move/replace management server?

[Martin Emrich]

Hi!


Am 02.03.18 um 10:49 schrieb Paul Angus:

Hi Martin,

At a high level, what I would recommend doing, is building a new management 
host on CentOS7, add it as an additional management server.  Update the 'host' 
entry in the global settings to point to the new host.  And then mark the 
original management server as removed (by setting a date in the removed field 
in the database).
Thanks, so I basically upgrade from a single-node-setup to a cluster, 
wait a day or so for all components to "learn" that there is a new guy 
in town, and then remove the old node? Sounds reasonable...

This assumes your database is on a separate VM/host.
The DB is running on the same host, but migrating it should be easy 
beforehand.


Thanks

Martin

RE: How to move/replace management server?

[Paul Angus]

Hi Martin,

At a high level, what I would recommend doing, is building a new management 
host on CentOS7, add it as an additional management server.  Update the 'host' 
entry in the global settings to point to the new host.  And then mark the 
original management server as removed (by setting a date in the removed field 
in the database).

This assumes your database is on a separate VM/host.  


Kind regards,

Paul Angus

paul.an...@shapeblue.com 
www.shapeblue.com
53 Chandos Place, Covent Garden, London  WC2N 4HSUK
@shapeblue
  
 


-Original Message-
From: Martin Emrich [mailto:martin.emr...@empolis.com] 
Sent: 02 March 2018 09:41
To: CloudStack-Users 
Subject: How to move/replace management server?

Hello!

My management server (running CentOS 6) is getting old... What is the correct 
procedure to move the management server to a new host, with new CentOS 7?

I expect that I have to change the IP address of the management server in many 
places (Agents/Config on the XenServers, SystemVMs, Virtual Routers, etc.)? Or 
is there some automation in place?

Thanks

Martin