CL260 - ch03s02

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Guided Exercise: Managing Cluster Configuration Settings

In this exercise, you query and modify Red Hat Ceph Storage configuration settings.

Outcomes

You should be able to view stored configuration settings, and view and set the value of a specific stored setting and a specific runtime setting.

Important

Do you need to reset your environment before performing this exercise?

If you performed the practice cluster deployments in the Deploying Red Hat Ceph Storage chapter exercises, but have not reset your environment back to the default classroom cluster since that chapter, then you must reset your environment before executing the lab start command.

As the student user on the workstation machine, use the lab command to prepare your system for this exercise.

[student@workstation ~]$ lab start configure-settings

This command confirms that the required hosts for this exercise are accessible.

Procedure 3.1. Instructions

[student@workstation ~]$ ssh admin@clienta
[admin@clienta ~]$ sudo cephadm shell
[ceph: root@clienta /]#

View the cluster configuration database.

[ceph: root@clienta /]# ceph config dump
WHO                                       MASK  LEVEL     OPTION                                 VALUE                           RO
global                                          advanced  cluster_network                        172.25.249.0/24                 *
...output omitted...
  mon                                           advanced  auth_allow_insecure_global_id_reclaim  false
  mon                                           advanced  public_network                         172.25.250.0/24                 *
  mgr                                           advanced  mgr/cephadm/container_init             True                            *
  mgr                                           advanced  mgr/cephadm/migration_current          2                               *
  mgr                                           advanced  mgr/cephadm/registry_password          redhat                          *
  mgr                                           advanced  mgr/cephadm/registry_url               registry.redhat.io              *
  mgr                                           advanced  mgr/cephadm/registry_username          registry                        *
  mgr                                           advanced  mgr/dashboard/ALERTMANAGER_API_HOST    http://172.25.250.12:9093       *
  mgr                                           advanced  mgr/dashboard/GRAFANA_API_SSL_VERIFY   false                           *
  mgr                                           advanced  mgr/dashboard/GRAFANA_API_URL          https://172.25.250.12:3000      *
  mgr                                           advanced  mgr/dashboard/PROMETHEUS_API_HOST      http://172.25.250.12:9095       *
  mgr                                           advanced  mgr/dashboard/ssl_server_port          8443                            *
  mgr                                           advanced  mgr/orchestrator/orchestrator          cephadm
    client.rgw.realm.zone.serverc.xhyhfk        basic     rgw_frontends                          beast port=80                   *
    client.rgw.realm.zone.serverd.fonetu        basic     rgw_frontends                          beast port=80                   *

View the runtime configuration settings for the osd.1 daemon.

[ceph: root@clienta /]# ceph config show osd.1
NAME                  VALUE                                                                 SOURCE    OVERRIDES  IGNORES
cluster_network       172.25.249.0/24                                                       mon
container_image       registry.redhat.io/rhceph/rhceph-5-rhel8@sha256:6306...47ff           mon
daemonize             false                                                                 override
keyring               $osd_data/keyring                                                     default
leveldb_log                                                                                 default
log_stderr_prefix     debug                                                                 default
log_to_file           false                                                                 default
log_to_stderr         true                                                                  default
mon_host              [v2:172.25.250.12:3300/0,v1:172.25.250.12:6789/0]                     file
no_config_file        false                                                                 override
rbd_default_features  61                                                                    default
setgroup              ceph                                                                  cmdline
setuser               ceph                                                                  cmdline

View the runtime and cluster configuration database value of the debug_ms setting for the osd.1 daemon. Edit the setting value to 10. Verify that the runtime and cluster configuration database value is applied. Restart the osd.1 daemon. Verify that the values for the debug_ms setting persist after the restart.
1. View the debug_ms runtime configuration setting for osd.1.
```
[ceph: root@clienta /]# ceph config show osd.1 debug_ms
0/0
```
2. View the debug_ms setting value that is stored in the cluster configuration database for the osd.1 daemon.
```
[ceph: root@clienta /]# ceph config get osd.1 debug_ms
0/0
```
3. Modify the debug_ms setting value for osd.1.
```
[ceph: root@clienta /]# ceph config set osd.1 debug_ms 10
```
4. Verify that the runtime and cluster configuration database value is applied.
```
[ceph: root@clienta /]# ceph config show osd.1 debug_ms
10/10
[ceph: root@clienta /]# ceph config get osd.1 debug_ms
10/10
```
5. Restart the osd.1 daemon.
```
[ceph: root@clienta /]# ceph orch daemon restart osd.1
Scheduled to restart osd.1 on host 'serverd.lab.example.com'
```
6. Run the cephadm shell and verify that the values persist after the restart.
```
[ceph: root@clienta /]# ceph config show osd.1 debug_ms
10/10
[ceph: root@clienta /]# ceph config get osd.1 debug_ms
10/10
```

Use ceph tell to temporarily override the debug_ms setting value for the osd.1 daemon to 5. Restart the osd.1 daemon in serverc and verify that the value is reverted.

View the runtime value of the debug_ms setting for osd.1.

[ceph: root@clienta /]# ceph tell osd.1 config get debug_ms
{
    "debug_ms": "10/10"
}

Temporarily change the runtime value of the debug_ms setting for osd.1 to 5. This setting reverts when you restart the osd.1 daemon.
```
[ceph: root@clienta /]# ceph tell osd.1 config set debug_ms 5
{
    "success": ""
}
```

Verify the runtime value of the debug_ms setting for osd.1.

[ceph: root@clienta /]# ceph tell osd.1 config get debug_ms
{
    "debug_ms": "5/5"
}

Restart the osd.1 daemon.

[ceph: root@clienta /]# ceph orch daemon restart osd.1
Scheduled to restart osd.1 on host 'serverd.lab.example.com'

Verify that the runtime value is reverted.

[ceph: root@clienta /]# ceph tell osd.1 config get debug_ms
{
    "debug_ms": "10/10"
}

Return to workstation as the student user.

[ceph: root@clienta /]# exit
[admin@clienta ~]$ exit
[student@workstation ~]$

Use a web browser to access the Ceph Dashboard GUI and edit the mon_allow_pool_delete advanced configuration setting to true in the global section.
1. Open a web browser and navigate to https://serverc:8443. If necessary, accept the certificate warning. The URL might redirect to serverd or servere, depending on the active MGR. Log in with user name admin and password redhat.
2. In the Ceph Dashboard web UI, click Cluster → Configuration to display the Configuration Settings page.
  Figure 3.1: Configuration settings in the Ceph Dashboard
3. Select the advanced option from the Level menu to view advanced configuration settings. Type mon_allow_pool_delete in the search bar to find the setting.
  Figure 3.2: Configuration setting search in the Ceph Dashboard
4. Click mon_allow_pool_delete and then click Edit.
  Figure 3.3: Editing configuration settings in the Ceph Dashboard
5. Edit the mon_allow_pool_delete setting, set the global value to true, and then click Save.
  Figure 3.4: Modifying a configuration setting in the Ceph Dashboard
  The dashboard displays a message to confirm the new setting.
  Figure 3.5: Modifying a configuration setting in the Ceph Dashboard

Finish

On the workstation machine, use the lab command to complete this exercise. This is important to ensure that resources from previous exercises do not impact upcoming exercises.

[student@workstation ~]$ lab finish configure-settings

This concludes the guided exercise.

Discuss Cloud Storage with Red Hat Ceph Storage

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Red Hat Ceph Storage for OpenStack (CL260)

Haley_Ruccio

3 sie 2023

Build, expand and maintain cloud-scale, clustered storage for your applications with Red Hat Ceph StorageCloud Storage with Red Hat Ceph Storage (CL260) is designed for storage administrators and cloud operators who deploy Red Hat Ceph Storage in a production data center environment or as a component of a Red Hat OpenStack Platform or OpenShift Container Platform infrastructure. Learn how to deploy, manage, and scale a Ceph storage cluster to provide hybrid storage resources, including Amazon S3 and OpenStack Swift-compatible object storage, Ceph-native and iSCSI-based block storage, and shared file storage. This course is based on Red Hat Ceph Storage 5.0.Course summaryDeploy and manage a Red Hat Ceph Storage cluster on commodity servers.Perform common management operations using the web-based management interface.Create, expand, and control access to storage pools provided by the Ceph cluster.Access Red Hat Ceph Storage from clients using object, block, and file-based methods.Analyze and tune Red Hat Ceph Storage performance.Integrate Red Hat OpenStack Platform image, object, block, and file storage with a Red Hat Ceph Storage cluster.Integrate OpenShift Container Platform with a Red Hat Ceph Storage cluster.Target AudienceThis course is intended for storage administrators and cloud operators who want to learn how to deploy and manage Red Hat Ceph Storage on servers in an enterprise data center or within a Red Hat OpenStack Platform or OpenShift Container Platform environment.Developers writing applications that use cloud-based storage will learn the distinctions of various storage types and client access methods.Recommended trainingTake our free assessment to gauge whether this offering is the best fit for your skills.Red Hat Certified System Administrator (RHCSA) certification, or equivalent experience.For candidates that have not earned an RHCSA or equivalent, confirmation of the correct skill set knowledge can be obtained by taking the online skills assessment.Some experience with storage administration is recommended but not required.Technology considerationsThis course does not have any special technical requirements.This course is not intended for BYOD.Internet access is recommended.

Welcome to the Red Hat Ceph Storage for OpenStack (CL260) group in the Red Hat Learning Community!

cschunke

31 lip 2023

We are excited to launch a space dedicated to the Red Hat Training course CL260! To gain the most value from this group - click the "Join Group" button in the upper right hand corner of the group home page.We encourage group members to collaborate in this group to discuss topics, ask questions, share best practices and tips, provide course feedback, and share their accomplishments as it relates to CL260.Read more about Red Hat Ceph Storage for OpenStack here.

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Revision: cl260-5.0-29d2128