High availability for Container Registry

The IBM Cloud® Container Registry service is a highly available, regional, service.

High availabilityThe ability of IT services to withstand all outages and continue providing processing capability according to some predefined service level. Covered outages include both planned events, such as maintenance and backups, and unplanned events, such as software failures, hardware failures, power failures, and disasters. (HA) is a core discipline in an IT infrastructure to keep your apps up and running, even after a partial or full site failure. The main purpose of high availability is to eliminate potential points of failures in an IT infrastructure.

In each supported region, traffic is load balanced across registry infrastructure in multiple availability zonesA location within a region that IBM Cloud Kubernetes Service runs in., with no single point of failure.
Data that is stored in IBM Cloud Container Registry is replicated over the availability zones and it is also backed up in another region regularly.
If you're worried about the availability of your images if an entire region is unavailable, you can choose to push your images to multiple registry regions.

You might also choose to push your images to multiple registry regions in case you accidentally delete or overwrite your images.

For more information about regions, see Regions.

For more information about service availability, see Service Level Agreements.

Ownership of responsibilities

To find out more about responsibility ownership for using IBM Cloud products between IBM and the customer, see Shared responsibilities for IBM Cloud products.

For more information about your responsibilities when you are using IBM Cloud Container Registry, see Shared responsibilities for IBM Cloud Container Registry.

What level of availability do I need?

You can achieve high availability on different levels in your IT infrastructure and within different components of your cluster. The level of availability that is appropriate for you depends on several factors, such as your business requirements, the service level agreements (SLAs) that you have with your customers, and the resources that you want to expend.

What level of availability does IBM Cloud offer?

The level of availability that you set up for your cluster impacts your coverage under the IBM Cloud high availability service level agreement terms.

Service level objectives (SLO) describe the design points that the IBM Cloud services are engineered to meet. IBM Cloud Container Registry is designed to achieve the following availability target.

Table 1. SLO for Container Registry
Availability target	Target Value
Availability %	99.999

The SLO is not a warranty and IBM does not issue credits for failure to meet an objective. Refer to the SLAs for commitments and credits that are issued for failure to meet any committed SLAs. For a summary of all service level objectives, see IBM Cloud service level objectives.

Locations for service availability

For more information about service availability within regions and data centers, see Service and infrastructure availability by location.

Frequently asked questions about high availability

Review the following FAQs about high availability.

Does IBM Cloud replicate the service?

IBM doesn't make replicas of your data available in any region other than the region where you stored it. High availability is achieved by running the service in three data centers in each region.

Are users required to replicate the service?

You're not required to replicate your data into another region, but you can do it yourself by using tools such as skopeo copy.