Re: [ClusterLabs] a newbie --question
Hi , Sorry but I'm a little confused.I should create a cluster with 4 node, how each node will be configured? I should note this, that end users only work with App Z. App Y only is in communication with App Z.So I should define one floating IP on all nodes? or on 2 App Z nodes? I should configure all services that related to App Z and App Y on all nodes? For example App Z is Apache. I should add Apache to resources on all nodes? or only to nodes that run this service? Thanks for your reply. Regards. From: Michael Schwartzkopff Am Dienstag, 15. September 2015, 13:38:59 schrieb H Yavari: > Hi, > Thanks for reply. > The problem is Compute resource, the appY and appZ can't run on same Server. > It is possible ? > Regards, As far as I understood: You have the applications Y and Z and the servers A, B, C and D. The applications Y and Z cannot run on the same node. Solution 1: Make two clusters M (from node A and B) and Cluster N (from nodes C and D). Cluster M runs the application Y and Cluster N run the application Z. Solution 2: Make one big cluster from all four nodes and configure constraints that the applications will not run on the same node. Side note: Basically you only need three nodes in this scenario: - application Y running on node A - application Z running on node B - in case of a failure of A or B the cluster starts the failed application on node C Mit freundlichen Grüßen, Michael Schwartzkopff -- [*] sys4 AG http://sys4.de, +49 (89) 30 90 46 64, +49 (162) 165 0044 Franziskanerstraße 15, 81669 München Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 Vorstand: Patrick Ben Koetter, Marc Schiffbauer Aufsichtsratsvorsitzender: Florian Kirstein ___ Users mailing list: Users@clusterlabs.org http://clusterlabs.org/mailman/listinfo/users Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org
Re: [ClusterLabs] a newbie --question
On 15/09/15 14:22, H Yavari wrote: Hi, I'm newbie to pacemaker. So I don't know about all features. My question : I have 4 servers, 2 servers are appY(active and standby) and 2 servers are appZ (active and standby). I want implement HA with Pacemaker, So I can do this for AppY and AppZ now (with following the tutorials). But my issue is that my servers must be pair. I mean : Pair#1 :AppY (active) + AppZ(active) and Pair#2 :AppY(standby) + AppZ(standby) So when any servers in pair#1 is failed, other pair goes active. it is possible ? How can I achieve this with configurations? Thanks. Regards, H.Yavari You can use 'location constraints' within Pacemaker to define preferred nodes for resources' (applications in your case) to run, and also to define which nodes a resource cannot run on. So, yes you can do what you want. ___ Users mailing list: Users@clusterlabs.org http://clusterlabs.org/mailman/listinfo/users Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org
Re: [ClusterLabs] a newbie --question
I should note this: AppY on Node A works only with AppZ on Node B, and AppY on Node C works only with AppZ on Node D.(Some hardware restrictions) Regards, From: Michael Schwartzkopff Am Dienstag, 15. September 2015, 13:38:59 schrieb H Yavari: > Hi, > Thanks for reply. > The problem is Compute resource, the appY and appZ can't run on same Server. > It is possible ? > Regards, As far as I understood: You have the applications Y and Z and the servers A, B, C and D. The applications Y and Z cannot run on the same node. Solution 1: Make two clusters M (from node A and B) and Cluster N (from nodes C and D). Cluster M runs the application Y and Cluster N run the application Z. Solution 2: Make one big cluster from all four nodes and configure constraints that the applications will not run on the same node. Side note: Basically you only need three nodes in this scenario: - application Y running on node A - application Z running on node B - in case of a failure of A or B the cluster starts the failed application on node C Mit freundlichen Grüßen, Michael Schwartzkopff -- [*] sys4 AG http://sys4.de, +49 (89) 30 90 46 64, +49 (162) 165 0044 Franziskanerstraße 15, 81669 München Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 Vorstand: Patrick Ben Koetter, Marc Schiffbauer Aufsichtsratsvorsitzender: Florian Kirstein ___ Users mailing list: Users@clusterlabs.org http://clusterlabs.org/mailman/listinfo/users Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org
Re: [ClusterLabs] a newbie --question
Am Dienstag, 15. September 2015, 13:57:36 schrieb H Yavari: > Hi, > Thanks a lot. But can you give me some hints about configuration? http://clusterlabs.org/doc/en-US/Pacemaker/1.1/html/Clusters_from_Scratch/ Mit freundlichen Grüßen, Michael Schwartzkopff -- [*] sys4 AG http://sys4.de, +49 (89) 30 90 46 64, +49 (162) 165 0044 Franziskanerstraße 15, 81669 München Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 Vorstand: Patrick Ben Koetter, Marc Schiffbauer Aufsichtsratsvorsitzender: Florian Kirstein signature.asc Description: This is a digitally signed message part. ___ Users mailing list: Users@clusterlabs.org http://clusterlabs.org/mailman/listinfo/users Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org
Re: [ClusterLabs] a newbie --question
Am Dienstag, 15. September 2015, 13:38:59 schrieb H Yavari: > Hi, > Thanks for reply. > The problem is Compute resource, the appY and appZ can't run on same Server. > It is possible ? > Regards, As far as I understood: You have the applications Y and Z and the servers A, B, C and D. The applications Y and Z cannot run on the same node. Solution1: Make two clusters M (from node A and B) and Cluster N (from nodes C and D). Cluster M runs the application Y and Cluster N run the application Z. Solution 2: Make one big cluster from all four nodes and configure constraints that the applications will not run on the same node. Side note: Basically you only need three nodes in this scenario: - application Y running on node A - application Z running on node B - in case of a failure of A or B the cluster starts the failed application on node C Mit freundlichen Grüßen, Michael Schwartzkopff -- [*] sys4 AG http://sys4.de, +49 (89) 30 90 46 64, +49 (162) 165 0044 Franziskanerstraße 15, 81669 München Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 Vorstand: Patrick Ben Koetter, Marc Schiffbauer Aufsichtsratsvorsitzender: Florian Kirstein signature.asc Description: This is a digitally signed message part. ___ Users mailing list: Users@clusterlabs.org http://clusterlabs.org/mailman/listinfo/users Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org
Re: [ClusterLabs] a newbie --question
Hi, Thanks a lot. But can you give me some hints about configuration? Regards, From: Andrei Borzenkov To: hyav...@rocketmail.com; Cluster Labs - All topics related to open-source clustering welcomed On Tue, Sep 15, 2015 at 4:38 PM, wrote: > Hi, > > Thanks for reply. > The problem is Compute resource, the appY and appZ can't run on same Server. > > It is possible ? > Yes; set location constraint that appY cannot run on the same node as appZ (and vice versa). Alternatively you can set location constraints that restrict appY and appZ to specific set of servers. ___ Users mailing list: Users@clusterlabs.org http://clusterlabs.org/mailman/listinfo/users Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org
Re: [ClusterLabs] a newbie --question
On Tue, Sep 15, 2015 at 4:38 PM, wrote: > Hi, > > Thanks for reply. > The problem is Compute resource, the appY and appZ can't run on same Server. > > It is possible ? > Yes; set location constraint that appY cannot run on the same node as appZ (and vice versa). Alternatively you can set location constraints that restrict appY and appZ to specific set of servers. ___ Users mailing list: Users@clusterlabs.org http://clusterlabs.org/mailman/listinfo/users Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org
Re: [ClusterLabs] a newbie --question
Hi, Thanks for reply. The problem is Compute resource, the appY and appZ can't run on same Server. It is possible ? Regards, From: Kai Dupke On 09/15/2015 07:22 AM, H Yavari wrote: > But my issue is that my servers must be pair. May I kindly ask to explain what is the reason is to request pairs? Is it because the systems belong to dedicated projects? Is it because the the apps shall not run on one node because of compute resource constrains? Is it because the nodes are separated by distance? Usually you can get a much higher availability with 4 nodes available if you allow all apps to run on all nodes, but usually have the apps not on the same node. This rule allow that up to 3 of the 4 nodes get down, but the apps are still available (even with less performance, but available). greetings Kai Dupke Senior Product Manager Server Product Line -- Sell not virtue to purchase wealth, nor liberty to purchase power. Phone: +49-(0)5102-9310828 Mail: kdu...@suse.com Mobile: +49-(0)173-5876766 WWW: www.suse.com SUSE Linux GmbH - Maxfeldstr. 5 - 90409 Nuernberg (Germany) GF:Felix Imendörffer,Jane Smithard,Graham Norton,HRB 21284 (AG Nürnberg) ___ Users mailing list: Users@clusterlabs.org http://clusterlabs.org/mailman/listinfo/users Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org
Re: [ClusterLabs] a newbie --question
On 09/15/2015 07:22 AM, H Yavari wrote: > But my issue is that my servers must be pair. May I kindly ask to explain what is the reason is to request pairs? Is it because the systems belong to dedicated projects? Is it because the the apps shall not run on one node because of compute resource constrains? Is it because the nodes are separated by distance? Usually you can get a much higher availability with 4 nodes available if you allow all apps to run on all nodes, but usually have the apps not on the same node. This rule allow that up to 3 of the 4 nodes get down, but the apps are still available (even with less performance, but available). greetings Kai Dupke Senior Product Manager Server Product Line -- Sell not virtue to purchase wealth, nor liberty to purchase power. Phone: +49-(0)5102-9310828 Mail: kdu...@suse.com Mobile: +49-(0)173-5876766 WWW: www.suse.com SUSE Linux GmbH - Maxfeldstr. 5 - 90409 Nuernberg (Germany) GF:Felix Imendörffer,Jane Smithard,Graham Norton,HRB 21284 (AG Nürnberg) ___ Users mailing list: Users@clusterlabs.org http://clusterlabs.org/mailman/listinfo/users Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org
