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123 lines
4.6 KiB
ReStructuredText
123 lines
4.6 KiB
ReStructuredText
dashboard plugin
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================
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The dashboard plugin is a web application that visualizes information and
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statistics about the Ceph cluster using a web server hosted by ``ceph-mgr``.
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The dashboard currently provides insight into the following aspects of your
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cluster:
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* **Overall cluster health**: Displays the overall cluster status, storage
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utilization (e.g. number of objects, raw capacity, usage per pool), a list of
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pools and their status and usage statistics, access to the cluster log file.
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* **Hosts**: Provides a list of all hosts associated to the cluster, which
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services are running and which version of Ceph is installed.
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* **Performance counters**: Displays detailed service-specific statistics for
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each running service.
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* **Monitors**: Lists all MONs, their quorum status, open sessions.
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* **Configuration Reference**: Lists all available configuration options,
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their description and default values.
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* **OSDs**: Lists 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**: Lists all hosts that run the TCMU runner service, displaying all
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images and their performance characteristics (read/write ops, traffic).
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* **RBD**: Lists all RBD images and their properties (size, objects, features)
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in a given pool.
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* **RBD mirroring**: Lists all active sync daemons and their status, pools and
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RBD images including their synchronization state.
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* **CephFS**: Lists all active filesystem clients and associated pools,
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including their usage statistics.
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* **Object Gateway**: Lists 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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This can be automated (e.g. during deployment) by adding the following to ceph.conf::
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[mon]
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mgr initial modules = dashboard
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Note that ``mgr initial modules`` takes a space-separated list of modules, so
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if you wanted to include other modules in addition to dashboard, just make it
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a list like so::
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mgr initial modules = balancer dashboard
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Configuration
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-------------
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Host name and port
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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 $PORT
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If the port is not configured, the web app will bind to port ``7000``.
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If the address it not configured, the web app will bind to ``::``,
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which corresponds to all available IPv4 and IPv6 addresses.
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If in doubt which URL to use to access the dashboard, the ``ceph mgr services``
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command will show the endpoints currently configured (look for the "dashboard"
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key).
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Username and password
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^^^^^^^^^^^^^^^^^^^^^
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In order to be able to log in, you need to define a username and password, which
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will be stored in the MON's configuration database::
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ceph dashboard set-login-credentials <username> <password>
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The password will be stored in the configuration database in encrypted form
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using ``bcrypt``. This is a global setting that applies to all dashboard instances.
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Accessing the dashboard
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^^^^^^^^^^^^^^^^^^^^^^^
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You can now access the dashboard using your (JavaScript-enabled) web browser, by
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pointing it to any of the host names or IP addresses and the selected TCP port
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where a manager instance is running: e.g., ``http://<$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/``.
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