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uvahpux's avatar
uvahpux
Level 4
11 years ago

Virtual ip configuration in global clustering.

Dear Gents, One of my previous discussion i was discussing how to setup global clustering with storage replication and i have received many helps . as per my understand i need to have two clusters...
business continuity
Cluster Server
  • mikebounds's avatar
    mikebounds
    11 years ago

    Here's an example:

    Site1:

    Cluster VIP 1.1.1.1 (IP resource in ClusterService service group)

    App1 VIP 1.1.1.11 (IP resource in SG1 service group)

    App2 VIP 1.1.1.12 (IP resource in SG2 service group)

     

    Site 2:

    Cluster VIP 1.1.1.2 (IP resource in ClusterService service group)

    App1 VIP 1.1.1.11 (IP resource in SG1 service group)

    App2 VIP 1.1.1.12 (IP resource in SG2 service group)

     

    Clients for App1 connect to 1.1.1.11 and clients for App2 connect to 1.1.1.12.

    The 2 clusters communicate using 1.1.1.1 and 1.1.1.2, so the ClusterService group should always be online in bot clusters.

    SG1 and SG2 are configured as global service groups so GCO only allows SG1 to be online on one site and the same for SG2 and so SG1 and SG2 can fail locally within th cluster or across sites.

    Mike

     

Gaurav_S's avatar
Gaurav_S
Moderator
11 years ago

Hi,

Ideally you would be configuring different SGs for different components or purpose right ? for e.g you may have separate databases in separate sgs or you may have one sg containing database, other sg containing application or middleware components etc. So depending on what you are using you need to take decision on vip.

If its a multi database cluster, you will have different listeners which will need different vips. For cluster management purpose every cluster must have a vip, which is tied to the cluster. This IP address will be defined in the cluster's ClusterAddress attribute. This address is normally configured as part of the initial VCS installation.

vip inside a service group will be common across sites,this is required because as site failover happens, applications will still search for same IP as primary & try to connect to those vips. E.g which Mike gave above explains same.

 

G