CentOS 8
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Ceph Octopus : Enable Dashboard
2020/07/06
 
Enable Ceph Dashboard to manage Ceph Cluster on Web Console.
This example is based on the environment like follows.
                                         |
        +--------------------+           |           +----------------------+
        |   [dlp.srv.world]  |10.0.0.30  |  10.0.0.31|    [www.srv.world]   |
        |     Ceph Client    +-----------+-----------+        RADOSGW       |
        |                    |           |           |                      |
        +--------------------+           |           +----------------------+
            +----------------------------+----------------------------+
            |                            |                            |
            |10.0.0.51                   |10.0.0.52                   |10.0.0.53 
+-----------+-----------+    +-----------+-----------+    +-----------+-----------+
|   [node01.srv.world]  |    |   [node02.srv.world]  |    |   [node03.srv.world]  |
|     Object Storage    +----+     Object Storage    +----+     Object Storage    |
|     Monitor Daemon    |    |                       |    |                       |
|     Manager Daemon    |    |                       |    |                       |
+-----------------------+    +-----------------------+    +-----------------------+

[1] Enable Dashboard module on [Manager Daemon] Node.
Furthermore, Dashboard requires SSL/TLS. Create a self-signed certificate on this example.
[root@node01 ~]#
dnf install ceph-mgr-dashboard
[root@node01 ~]#
ceph mgr module enable dashboard

[root@node01 ~]#
ceph mgr module ls | grep -A 5 enabled_modules

    "enabled_modules": [
        "dashboard",
        "iostat",
        "restful"
    ],
    "disabled_modules": [

# create self-signed certificate

[root@node01 ~]#
ceph dashboard create-self-signed-cert

Self-signed certificate created
# create a user for Dashboard

# [ceph dashboard ac-user-create (username) (password) administrator]

[root@node01 ~]#
ceph dashboard ac-user-create cent password administrator

{"username": "cent", "password": "$2b$12$oiqzfiNsHW8e2YYzqwpjNeZ3x1Gwjvw1SMHMu/pU94Nd06ZRZhTOa", "roles": ["administrator"], "name": null, "email": null, "lastUpdate": 1593677443, "enabled": true, "pwdExpirationDate": null, "pwdUpdateRequired": false}

# confirm Dashboard URL

[root@node01 ~]#
ceph mgr services

{
    "dashboard": "https://node01.srv.world:8443/"
}
[2] On Dashboard Host, If Firewalld is running, allow service ports.
[root@node01 ~]#
firewall-cmd --add-port=8443/tcp --permanent

[root@node01 ~]#
firewall-cmd --reload

[3] Access to the Dashboard URL from a Client Computer with Web Browser, then Ceph Dashboard Login form is shown. Login as a user you just added in [1] section. After login, it's possible to see various status of Ceph Cluster.
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