EX370 Red Hat Certified Specialist In OpenShift Data Foundation Practice Questions
Prepare for EX370 with more than an answer.
- 1
Which Prometheus alert would most likely trigger if the available storage capacity in the ODF cluster drops below 15%?
Show answer details
Correct answer: B
The
CephClusterNearFullalert typically triggers when storage utilization reaches a warning threshold (often 75% or 85% full), indicating that the cluster is approaching capacity limits. - 2
Case Study: GlobalFinance Corp
GlobalFinance Corp is implementing a Metro Disaster Recovery solution using OpenShift Data Foundation across two data centers located 5ms apart. They use Advanced Cluster Management (ACM) to manage the clusters.
The primary site (Site A) hosts the active workload. The secondary site (Site B) is standby. They require zero data loss (RPO=0) in case of a site failure.
Which replication strategy and configuration is essential to achieve this RPO?
Show answer details
Correct answer: C
For RPO=0 (Zero Data Loss) in a Metro setup (low latency), synchronous replication is required. A stretched Ceph cluster writes data to both sites simultaneously before acknowledging the write. An arbiter node in a third location is crucial to prevent split-brain scenarios.
- 3
You need to create a new storage class in ODF that uses Erasure Coding (4+2) to optimize for storage efficiency rather than performance. The default replication is 3-way. Which Ceph resource must be configured first to support this storage class?
Show answer details
Correct answer: C
StorageClasses in ODF for Block storage map to a
CephBlockPool. To use erasure coding, you must create a specificCephBlockPoolresource with theerasureCodedsection specifying the data and coding chunks (e.g., 4+2). - 4
A cloud architect is designing a storage solution for a high-performance database workload on OpenShift using OpenShift Data Foundation. The requirement specifies that the storage must support ReadWriteOnce (RWO) access mode and provide the lowest possible latency for transaction logs. Which storage class should be selected for the PersistentVolumeClaim (PVC)?
Show answer details
Correct answer: D
The
ocs-storagecluster-ceph-rbdstorage class utilizes the Ceph RADOS Block Device (RBD) protocol. RBD operates at the block level, providing lower latency and higher performance compared to file-based protocols, making it the optimal choice for database transaction logs requiring RWO access. - 5
An administrator needs to deploy OpenShift Data Foundation on an existing OpenShift cluster running on bare metal nodes. The nodes have raw, unformatted disks available for storage. Which custom resource must be configured to discover and provision these disks for use by ODF?
Show answer details
Correct answer: D
The
LocalVolumeSetcustom resource is used by the Local Storage Operator to automatically discover available disks matching specific criteria (like device type or size) and provision PersistentVolumes for them, which ODF then consumes. - 6
A developer requests a storage solution for a web application that requires shared access to media files across multiple pods running on different nodes. The application expects a standard POSIX filesystem interface. Which configuration meets these requirements?
Show answer details
Correct answer: D
CephFS supports ReadWriteMany (RWX), allowing multiple pods on different nodes to mount the same volume simultaneously with a POSIX-compliant filesystem interface, ideal for shared media files.
