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authorQiaowei Ren <qiaowei.ren@intel.com>2018-01-04 13:43:33 +0800
committerQiaowei Ren <qiaowei.ren@intel.com>2018-01-05 11:59:39 +0800
commit812ff6ca9fcd3e629e49d4328905f33eee8ca3f5 (patch)
tree04ece7b4da00d9d2f98093774594f4057ae561d4 /src/ceph/doc/mgr/administrator.rst
parent15280273faafb77777eab341909a3f495cf248d9 (diff)
initial code repo
This patch creates initial code repo. For ceph, luminous stable release will be used for base code, and next changes and optimization for ceph will be added to it. For opensds, currently any changes can be upstreamed into original opensds repo (https://github.com/opensds/opensds), and so stor4nfv will directly clone opensds code to deploy stor4nfv environment. And the scripts for deployment based on ceph and opensds will be put into 'ci' directory. Change-Id: I46a32218884c75dda2936337604ff03c554648e4 Signed-off-by: Qiaowei Ren <qiaowei.ren@intel.com>
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+.. _mgr-administrator-guide:
+
+ceph-mgr administrator's guide
+==============================
+
+Manual setup
+------------
+
+Usually, you would set up a ceph-mgr daemon using a tool such
+as ceph-ansible. These instructions describe how to set up
+a ceph-mgr daemon manually.
+
+First, create an authentication key for your daemon::
+
+ ceph auth get-or-create mgr.$name mon 'allow profile mgr' osd 'allow *' mds 'allow *'
+
+Place that key into ``mgr data`` path, which for a cluster "ceph"
+and mgr $name "foo" would be ``/var/lib/ceph/mgr/ceph-foo``.
+
+Start the ceph-mgr daemon::
+
+ ceph-mgr -i $name
+
+Check that the mgr has come up by looking at the output
+of ``ceph status``, which should now include a mgr status line::
+
+ mgr active: $name
+
+Client authentication
+---------------------
+
+The manager is a new daemon which requires new CephX capabilities. If you upgrade
+a cluster from an old version of Ceph, or use the default install/deploy tools,
+your admin client should get this capability automatically. If you use tooling from
+elsewhere, you may get EACCES errors when invoking certain ceph cluster commands.
+To fix that, add a "mgr allow \*" stanza to your client's cephx capabilities by
+`Modifying User Capabilities`_.
+
+High availability
+-----------------
+
+In general, you should set up a ceph-mgr on each of the hosts
+running a ceph-mon daemon to achieve the same level of availability.
+
+By default, whichever ceph-mgr instance comes up first will be made
+active by the monitors, and the others will be standbys. There is
+no requirement for quorum among the ceph-mgr daemons.
+
+If the active daemon fails to send a beacon to the monitors for
+more than ``mon mgr beacon grace`` (default 30s), then it will be replaced
+by a standby.
+
+If you want to pre-empt failover, you can explicitly mark a ceph-mgr
+daemon as failed using ``ceph mgr fail <mgr name>``.
+
+Using modules
+-------------
+
+Use the command ``ceph mgr module ls`` to see which modules are
+available, and which are currently enabled. Enable or disable modules
+using the commands ``ceph mgr module enable <module>`` and
+``ceph mgr module disable <module>`` respectively.
+
+If a module is *enabled* then the active ceph-mgr daemon will load
+and execute it. In the case of modules that provide a service,
+such as an HTTP server, the module may publish its address when it
+is loaded. To see the addresses of such modules, use the command
+``ceph mgr services``.
+
+Some modules may also implement a special standby mode which runs on
+standby ceph-mgr daemons as well as the active daemon. This enables
+modules that provide services to redirect their clients to the active
+daemon, if the client tries to connect to a standby.
+
+Consult the documentation pages for individual manager modules for more
+information about what functionality each module provides.
+
+Here is an example of enabling the ``dashboard`` module:
+
+::
+
+ $ ceph mgr module ls
+ {
+ "enabled_modules": [
+ "restful",
+ "status"
+ ],
+ "disabled_modules": [
+ "dashboard"
+ ]
+ }
+
+ $ ceph mgr module enable dashboard
+ $ ceph mgr module ls
+ {
+ "enabled_modules": [
+ "restful",
+ "status",
+ "dashboard"
+ ],
+ "disabled_modules": [
+ ]
+ }
+
+ $ ceph mgr services
+ {
+ "dashboard": "http://myserver.com:7789/",
+ "restful": "https://myserver.com:8789/"
+ }
+
+
+Calling module commands
+-----------------------
+
+Where a module implements command line hooks, the commands will
+be accessible as ordinary Ceph commands::
+
+ ceph <command | help>
+
+If you would like to see the list of commands handled by the
+manager (where normal ``ceph help`` would show all mon and mgr commands),
+you can send a command directly to the manager daemon::
+
+ ceph tell mgr help
+
+Note that it is not necessary to address a particular mgr instance,
+simply ``mgr`` will pick the current active daemon.
+
+Configuration
+-------------
+
+OPTION(mgr_module_path, OPT_STR, CEPH_PKGLIBDIR "/mgr") // where to load python modules from
+
+``mgr module path``
+
+:Description: Path to load modules from
+:Type: String
+:Default: ``"<library dir>/mgr"``
+
+``mgr data``
+
+:Description: Path to load daemon data (such as keyring)
+:Type: String
+:Default: ``"/var/lib/ceph/mgr/$cluster-$id"``
+
+``mgr tick period``
+
+:Description: How many seconds between mgr beacons to monitors, and other
+ periodic checks.
+:Type: Integer
+:Default: ``5``
+
+``mon mgr beacon grace``
+
+:Description: How long after last beacon should a mgr be considered failed
+:Type: Integer
+:Default: ``30``
+
+.. _Modifying User Capabilities: ../../rados/operations/user-management/#modify-user-capabilities