Chapter 2. Recovery for zone-aware HA applications with RWX storage

PDF

Applications that are deployed with topologyKey: topology.kubernetes.io/zone, have one or more replicas scheduled in each data zone, and are using shared storage, that is, ReadWriteMany (RWX) CephFS volume, recovers on the active zone within 30-60 seconds for new connections. The short pause is for HAProxy to refresh connections if a router pod is now offline in the failed data zone.

An example of this type of application is detailed in the Install Zone Aware Sample Application section.

Important

When you install the sample application, power off the OpenShift Container Platform nodes (at least the nodes with OpenShift Data Foundation devices) to test the failure of a data zone in order to validate that your file-uploader application is available, and you can upload new files.

Github

Youtube

Twitter

Learn

Try, buy, & sell

Communities

About Red Hat Documentation

We help Red Hat users innovate and achieve their goals with our products and services with content they can trust.

Making open source more inclusive

Red Hat is committed to replacing problematic language in our code, documentation, and web properties. For more details, see the Red Hat Blog.

About Red Hat

We deliver hardened solutions that make it easier for enterprises to work across platforms and environments, from the core datacenter to the network edge.