This exam is based on Red Hat Ceph Storage 3.0.
The Red Hat Certified Specialist in Ceph Storage Administration exam (EX125) tests the knowledge, skills, and ability to install, configure, and manage Red Hat® Ceph Storage clusters.
By passing this exam, you become a Red Hat Certified Specialist in Ceph Storage Administration, which also counts toward becoming a Red Hat Certified Architect (RHCA®).
This exam is based on Red Hat Ceph Storage 3.0.
Exam Preparation - Study points for the examTo help you prepare, the exam objectives highlight the task areas you can expect to see covered in the exam. Red Hat reserves the right to add, modify, and remove exam objectives. Such changes will be made public in advance.
You should be able to perform these tasks:
Install Red Hat Ceph Storage Server- Install Red Hat Ceph Storage Server on both physical and virtual systems
- Be familiar with the Ansible installation files for Ceph
- Be able to install a Ceph Storage Server using Ansible
- Be able to change a Ceph Storage Server configuration
- Add monitor (MON) nodes and object storage device (OSD) nodes
- Configure a replicated storage pool
- Store objects in storage pool
- Store objects within a namespace within a storage pool
- Create an erasure-coded pool profile with specified parameters
- Change default settings in the Ceph configuration files
- Manage Ceph authentication
- Create a Ceph client with restricted read or write access to MONs, OSDs, pools, and namespaces
- Create a RADOS block device image
- Obtain information about a RADOS block device image
- Map a RADOS block device image on a server
- Use a RADOS block device image
- Create an RBD snapshot
- Create an RBD clone
- Configure RBD mirrors
- Deploy a RBD mirror agent
- Configure one-way RBD mirroring in pool mode
- Configure one-way RBD mirroring in image mode
- Check the status of the mirroring process
- Import and export RBD images
- Export a RADOS block device to an image file
- Create an incremental RBD image file
- Import a full RBD image file
- Import a full RBD image file updated with an incremental RBD image file
- Deploy a RADOS gateway
- Deploy a multisite RADOS gateway
- Provide object storage using the Amazon S3 API
- Be able to create a RADOSGW user that will use the S3 clients commands
- Be able to upload and download objects to a RADOSGW using the S3 client commands
- Export S3 objects using NFS
- Provide object storage for Swift
- Be able to create a RADOSGW user that will use the Swift interface
- Be able to upload or download objects to a RADOSGW using Swift commands
- Create a Ceph file system
- Deploy virtual machines using templates
- Mount a Ceph file system on a client node, persistently
- Configure CephFS quotas
- Create a CephFS snapshot
- Be able to create a bucket hierarchy in a CRUSH map that can be used in an erasure profile or a replicant rule
- Be able to remap a PG
- Be able to remap all PGs in a pool for an optimal redistribution
- Manage MON and OSD maps
- Be able to monitor and change OSD storage limits for monitoring available space on an OSD
- Determine the general status of a Ceph cluster
- Troubleshoot problems with OSDs and MONs
- Specify and tune key network tuning parameters for a Ceph cluster
- Control and manage scrubbing and deep scrubbing
- Control and manage recovery and rebalancing processes
- Control and manage RAM utilization against I/O performance
- Troubleshoot client issues
- Enable debugging mode on RADOS gateway
- Optimize RBD client access using key tuning parameters
- Integrate Ceph using both Glance and Cinder
- Identify key Glance configuration files
- Configure Glance to use Ceph as a backend to store images in the Ceph cluster
- Identify key Cinder configuration files
- Configure Cinder to use Ceph RBDs for block storage backing volumes
As with all Red Hat performance-based exams, configurations must persist after reboot without intervention.
Preparation- Red Hat encourages all candidates for Red Hat Certified Specialist in Ceph Storage Administration exam (EX125) to consider taking Red Hat Ceph Storage Architecture and Administration (CEPH125) to help prepare. Attendance in these classes is not required; students can choose to take just the exam.
- While attending Red Hat classes can be an important part of your preparation, attending class does not guarantee success on the exam. Previous experience, practice, and native aptitude are also important determinants of success.
- Many books and other resources on system administration for Red Hat products are available. Red Hat does not endorse any of these materials as preparation guides for exams. Nevertheless, you may find additional reading helpful to deepen your understanding.
- This exam is a performance-based evaluation of skills and knowledge required to configure and manage Red Hat Ceph Storage clusters. You perform the configuration and administrative tasks necessary to deploy Red Hat Ceph Storage on multiple systems and are evaluated on whether they have met specific objective criteria. Performance-based testing means that you must perform tasks similar to what you perform on the job.
These audiences may be interested in becoming a Red Hat Certified Specialist in Ceph Storage Administration:
- Red Hat Certified Engineers who wish to become a Red Hat Certified Architect (RHCA)
- System administrators who want to demonstrate the ability to configure Ceph Storage clusters
- Be a Red Hat Certified System Administrator (RHCSA) or have comparable work experience and skills (Red Hat Certified Engineer (RHCE) would be even better)
- Have taken Red Hat Ceph Storage Architecture and Administration (CEPH125) or have comparable work experience
- Review the Red Hat Certified Specialist in Ceph Storage Administration exam objectives
- Red Hat Ceph Storage Architecture and Administration (CEPH125)