API Gateway Cluster Upgrade Guidelines
In API Gateway, a cluster is defined as multiple nodes where each node is an Integration Server instance that hosts API Gateway. Each Integration Server installation can contain multiple instances of API Gateway.
This section is intended for use with the rest of this chapter. You must perform all documented tasks for your products in the order they are written in this chapter, with these additional tasks or exceptions:
When you install the new
API Gateways, create a cluster of nodes that matches your old cluster. You can install the new
API Gateways in parallel.
If an old node includes multiple instances, create multiple instances in the new node. The new instance names do not have to be the same as the old instances names.
When you install the fixes on the new
API Gateways, you can install the fixes in parallel.
When you start the data stores, start all the old data stores and then start all the new data stores.
When you shut down the old products, shut down all cluster nodes.
Migrate the data store for only one node. The data stores for the new nodes will be synchronized with the migrated data store when you start the new
API Gateways after migration.
Migrate old
API Gateway configurations, data, and assets for every node.
Configure the cluster as instructed in the webMethods API Gateway Administration guide.