Kurz: EX125 - Red Hat Certified Specialist in Ceph Storage Administration exam

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®).
Study points for the exam To help you prepare, these 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

• Work with existing Red Hat Ceph Storage Server appliances

Be able to change a Ceph Storage Server configuration
Add monitor (MON) nodes and object storage device (OSD) nodes

• Configure Red Hat Ceph Storage Server

Configure a replicated storage pool
Store objects in storage pool
Store objects within a namespace within a storage pool
Create and configure erasure-coded pools
Create an erasure-coded pool profile with specified parameters
Upload a file to an erasure-coded pool
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

• Provide block storage with RBD

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

• Provide object storage with RADOSGW

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

• Provide file storage with CephFS

Create a Ceph file system
Mount a Ceph file system on a client node, persistently
Configure CephFS quotas
Create a CephFS snapshot

• Configure a CRUSH map

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 and update cluster maps

Manage MON and OSD maps
Be able to monitor and change OSD storage limits for monitoring available space on an OSD
Manage a Red Hat Ceph Storage cluster
Determine the general status of a Ceph cluster
Troubleshoot problems with OSDs and MONs

• Tune Red Hat Ceph Storage

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 Red Hat Ceph Storage server problems

Troubleshoot client issues
Enable debugging mode on RADOS gateway
Optimize RBD client access using key tuning parameters

• Integrate Red Hat Ceph Storage with Red Hat OpenStack

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
Prerequisites

• 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

Recommended course
CEPH125 - Red Hat Ceph 3 Storage Architecture and Administration

Study points for the exam To help you prepare, these 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

• Work with existing Red Hat Ceph Storage Server appliances

Be able to change a Ceph Storage Server configuration
Add monitor (MON) nodes and object storage device (OSD) nodes

• Configure Red Hat Ceph Storage Server

Configure a replicated storage pool
Store objects in storage pool
Store objects within a namespace within a storage pool
Create and configure erasure-coded pools
Create an erasure-coded pool profile with specified parameters
Upload a file to an erasure-coded pool
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

• Provide block storage with RBD

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

• Provide object storage with RADOSGW

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

• Provide file storage with CephFS

Create a Ceph file system
Mount a Ceph file system on a client node, persistently
Configure CephFS quotas
Create a CephFS snapshot

• Configure a CRUSH map

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 and update cluster maps

Manage MON and OSD