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482074c2a3
Updated the dashboard chapter in the manual to reflect the changes introduced by Dashboard v2 (e.g. username/password). Updated description to include a high-level overview of the features available. Signed-off-by: Lenz Grimmer <lgrimmer@suse.com>
93 lines
3.8 KiB
ReStructuredText
93 lines
3.8 KiB
ReStructuredText
dashboard plugin
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================
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Dashboard plugin visualizes the statistics of the cluster using a web server
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hosted by ``ceph-mgr``. The dashboard currently provides insight into the
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following aspects of your Ceph cluster:
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* **Overall cluster health**: The overall cluster status, storage utilization
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(e.g. number of objects, raw capacity, usage per pool), a list of pools and
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their status and usage statistics, access to the cluster log file.
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* **Hosts**: A list of all hosts associated to the cluster, which services
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are running and which version of Ceph is installed.
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* **Performance counters**: Display detailed statistics for each running service.
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* **Monitors**: List of all MONs, their quorum status, open sessions.
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* **Configuration Reference**: List all available configuration options, their
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description and default values.
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* **OSDs**: A list of all OSDs, their status and usage statistics as well as
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detailed information like attributes (OSD map), metadata, performance counters
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and usage histograms for read/write operations.
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* **iSCSI**: List all hosts that run the TCMU runner service, list of all images
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and their performance characteristics (read/write ops, traffic).
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* **RBD**: List of all RBD images and their properties (size, objects, features)
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in a given pool.
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* **CephFS**: List all active filesystem clients and associated pools, including
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their usage statistics.
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* **Object Gateway**: List of all active object gateways and their performance
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counters.
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Enabling
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--------
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The *dashboard* module is enabled with::
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ceph mgr module enable dashboard
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Configuration
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-------------
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Like most web applications, dashboard binds to a host name and port.
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By default, the ``ceph-mgr`` daemon hosting the dashboard (i.e., the
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currently active manager) will bind to port 7000 and any available
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IPv4 or IPv6 address on the host.
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Since each ``ceph-mgr`` hosts its own instance of dashboard, it may
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also be necessary to configure them separately. The hostname and port
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can be changed via the configuration key facility::
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ceph config-key set mgr/dashboard/$name/server_addr $IP
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ceph config-key set mgr/dashboard/$name/server_port $PORT
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where ``$name`` is the ID of the ceph-mgr who is hosting this
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dashboard web app.
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These settings can also be configured cluster-wide and not manager
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specific. For example,::
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ceph config-key set mgr/dashboard/server_addr $IP
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ceph config-key set mgr/dashboard/server_port $PORT
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If the port is not configured, the web app will bind to port ``7000``.
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If the address it not configured, the web app will bind to ``::``,
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which corresponds to all available IPv4 and IPv6 addresses.
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In order to be able to log in, you need to define a username and password, which
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will be stored in the MON's configuration database::
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ceph dashboard set-login-credentials <username> <password>
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The password will be stored in the configuration database in encrypted form
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using ``bcrypt``. This is a global setting that applies to all dashboard instances.
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You can now access the dashboard using your (JavaScript-enabled) web browser, by
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pointing it to the selected TCP port and any of the host names or IP addresses
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where a manager instance runs on, e.g. ``http://<$IP>:<$PORT>/``.
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You should then be greeted by the dashboard login page, requesting your
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previously defined username and password. Select the **Keep me logged in**
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checkbox if you want to skip the username/password request when accessing the
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dashboard in the future.
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Reverse proxies
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---------------
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If you are accessing the dashboard via a reverse proxy configuration,
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you may wish to service it under a URL prefix. To get the dashboard
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to use hyperlinks that include your prefix, you can set the
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``url_prefix`` setting:
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::
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ceph config-key set mgr/dashboard/url_prefix $PREFIX
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so you can access the dashboard at ``http://$IP:$PORT/$PREFIX/``. |