Understanding zone failure
In this section, zone failure is considered as a failure where all OpenShift® Container Platform, master and worker nodes in a zone are no
longer communicating with the resources in the second data zone (for example, powered down nodes).
If communication between the data zones is still partially working (intermittently up or down), the
cluster, storage, and network admins should disconnect the communication path between the data zones
for recovery to succeed.
Important: Before installing the sample application, power off
the OpenShift Container Platform nodes (at least the nodes with
Fusion Data Foundation devices) to test the failure of a
data zone to validate that your file-uploader application is available, and you can upload new
files.
Note: To prevent volume corruption during non-graceful node shutdowns, follow the steps
in Fencing and tainting nodes to prevent volume corruption during non-graceful node shutdowns.