| copyright | lastupdated | keywords | subcollection | ||
|---|---|---|---|---|---|
|
2021-08-24 |
HA for Event Notifications, high availability for Event Notifications, Event Notifications |
_your-subcollection_ |
{:new_window: target="_blank"} {:shortdesc: .shortdesc} {:screen: .screen} {:pre: .pre} {:table: .aria-labeledby="caption"} {:codeblock: .codeblock} {:tip: .tip} {:download: .download} {:term: .term}
{: #en-ha}
{{site.data.keyword.en_short}} service is a highly available, regional service that runs in multiple zones.
In each supported multizone region, every zone has its own {{site.data.keyword.Bluemix_notm}} Kubernetes service cluster with several worker nodes. Each worker node runs several instances of {{site.data.keyword.en_short}} service components. Each region is fronted by a global load balancer and a web application firewall. {: shortdesc}
{{site.data.keyword.en_short}} service persists tenant data in highly available database. A single regional database is used to store data of all the {{site.data.keyword.en_short}} tenants in that particular region. The data is stored across multiple zones in each region. Data that is stored in {{site.data.keyword.en_short}} service is encrypted and persisted in a database cluster that is spread across availability zones. All databases connections use TLS/SSL encryption for data in transit.
{{site.data.keyword.en_short}} service is a regional service. It does not provide automated cross-regional failover or cross-regional disaster recovery. If a regional disaster occurs, all the data might not be recovered. However, a location recovery is possible and data can be restored.
For regional disaster recovery, it is recommended that you create and maintain backup instances in other regions. To synchronize a service instance in one region with an instance in a different region, use the APIs.
Review the API documentation and decide the data that you want backed up and restored, in an eventuality.
Examples to start with:
| Entity | Endpoint | Description |
|---|---|---|
| sources | /v1/instances/{instance_id}/sources | Your platform sources |
| topics | /v1/instances/{instance_id}/topics | All registered topics |
| rules | /v1/instances/{instance_id}/rules | All rules created on topics |
| destinations | /v1/instances/{instance_id}/destinations | All registered destinations |
| subscriptions | /v1/instances/{instance_id}/subscriptions | All the subscriptions |
For each of the data set that you need to back up and restore, use GET calls to get a copy of the data. And use the corresponding PUT / POST API to populate the new instance on a different region.
{: #en-ha-locations}
For more information about service availability within regions and data centers, see here.