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.. _orchestrator-cli-module:
================
Orchestrator CLI
================
This module provides a command line interface (CLI) for orchestrator modules.
Orchestrator modules are ``ceph-mgr`` plugins that interface with external
orchestration services.
Definition of Terms
===================
The orchestrator CLI unifies multiple external orchestrators, so we need a
common nomenclature for the orchestrator module:
+--------------------------------------+---------------------------------------+
| *host* | hostname (not the DNS name) of the |
| | physical host. Not the podname, |
| | container name, or hostname inside |
| | the container. |
+--------------------------------------+---------------------------------------+
| *service type* | The type of the service. e.g., nfs, |
| | mds, osd, mon, rgw, mgr, iscsi |
+--------------------------------------+---------------------------------------+
| *service* | A logical service. Typically |
| | comprised of multiple service |
| | instances on multiple hosts for HA |
| | |
| | * ``fs_name`` for mds type |
| | * ``rgw_zone`` for rgw type |
| | * ``ganesha_cluster_id`` for nfs type |
+--------------------------------------+---------------------------------------+
| *daemon* | A single instance of a service. |
| | Usually a daemon, but maybe not |
| | (e.g., might be a kernel service |
| | like LIO or knfsd or whatever) |
| | |
| | This identifier should |
| | uniquely identify the instance. |
+--------------------------------------+---------------------------------------+
Here is how the names relate:
* A *service* has a specific *service type*.
* A *daemon* is a physical instance of a *service type*.
.. note::
Orchestrator modules might implement only a subset of the commands listed
below. The implementation of the commands may differ between modules.
Status
======
.. prompt:: bash $
ceph orch status [--detail]
This command shows the current orchestrator mode and its high-level status
(whether the orchestrator plugin is available and operational).
..
Turn On Device Lights
^^^^^^^^^^^^^^^^^^^^^
::
ceph orch device ident-on <dev_id>
ceph orch device ident-on <dev_name> <host>
ceph orch device fault-on <dev_id>
ceph orch device fault-on <dev_name> <host>
ceph orch device ident-off <dev_id> [--force=true]
ceph orch device ident-off <dev_id> <host> [--force=true]
ceph orch device fault-off <dev_id> [--force=true]
ceph orch device fault-off <dev_id> <host> [--force=true]
where ``dev_id`` is the device id as listed in ``osd metadata``,
``dev_name`` is the name of the device on the system and ``host`` is the host as
returned by ``orchestrator host ls``
ceph orch osd ident-on {primary,journal,db,wal,all} <osd-id>
ceph orch osd ident-off {primary,journal,db,wal,all} <osd-id>
ceph orch osd fault-on {primary,journal,db,wal,all} <osd-id>
ceph orch osd fault-off {primary,journal,db,wal,all} <osd-id>
where ``journal`` is the filestore journal device, ``wal`` is the bluestore
write ahead log device, and ``all`` stands for all devices associated with the OSD
.. _orchestrator-cli-stateless-services:
Stateless services (MDS/RGW/NFS/rbd-mirror/iSCSI)
=================================================
.. note::
The orchestrator will not configure the services. See the relevant
documentation for details about how to configure particular services.
The ``name`` parameter identifies the kind of the group of instances. The
following short list explains the meaning of the ``name`` parameter:
* A CephFS file system identifies a group of MDS daemons.
* A zone name identifies a group of RGWs.
Creating/growing/shrinking/removing services:
.. prompt:: bash $
ceph orch apply mds <fs_name> [--placement=<placement>] [--dry-run]
ceph orch apply rgw <name> [--realm=<realm>] [--zone=<zone>] [--port=<port>] [--ssl] [--placement=<placement>] [--dry-run]
ceph orch apply nfs <name> <pool> [--namespace=<namespace>] [--placement=<placement>] [--dry-run]
ceph orch rm <service_name> [--force]
where ``placement`` is a :ref:`orchestrator-cli-placement-spec`.
e.g., ``ceph orch apply mds myfs --placement="3 host1 host2 host3"``
Service Commands:
.. prompt:: bash $
ceph orch <start|stop|restart|redeploy|reconfig> <service_name>
.. note:: These commands apply only to cephadm containerized daemons.
Options
=======
.. option:: start
Start the daemon on the corresponding host.
.. option:: stop
Stop the daemon on the corresponding host.
.. option:: restart
Restart the daemon on the corresponding host.
.. option:: redeploy
Redeploy the Ceph daemon on the corresponding host. This will recreate the daemon directory
structure under ``/var/lib/ceph/<fsid>/<daemon-name>`` (if it doesn't exist), refresh its
configuration files, regenerate its unit-files and restarts the systemd daemon.
.. option:: reconfig
Reconfigure the daemon on the corresponding host. This will refresh configuration files then restart the daemon.
.. note:: this command assumes the daemon directory ``/var/lib/ceph/<fsid>/<daemon-name>`` already exists.
Configuring the Orchestrator CLI
================================
Enable the orchestrator by using the ``set backend`` command to select the orchestrator module that will be used:
.. prompt:: bash $
ceph orch set backend <module>
Example - Configuring the Orchestrator CLI
------------------------------------------
For example, to enable the Rook orchestrator module and use it with the CLI:
.. prompt:: bash $
ceph mgr module enable rook
ceph orch set backend rook
Confirm that the backend is properly configured:
.. prompt:: bash $
ceph orch status
Disable the Orchestrator
------------------------
To disable the orchestrator, use the empty string ``""``:
.. prompt:: bash $
ceph orch set backend ""
ceph mgr module disable rook
Current Implementation Status
=============================
This is an overview of the current implementation status of the orchestrators.
=================================== ====== =========
Command Rook Cephadm
=================================== ====== =========
apply iscsi ⚪ ✔
apply mds ✔ ✔
apply mgr ⚪ ✔
apply mon ✔ ✔
apply nfs ✔ ✔
apply osd ✔ ✔
apply rbd-mirror ✔ ✔
apply cephfs-mirror ⚪ ✔
apply grafana ⚪ ✔
apply prometheus ❌ ✔
apply alertmanager ❌ ✔
apply node-exporter ❌ ✔
apply rgw ✔ ✔
apply container ⚪ ✔
apply snmp-gateway ❌ ✔
host add ⚪ ✔
host ls ✔ ✔
host rm ⚪ ✔
host maintenance enter ❌ ✔
host maintenance exit ❌ ✔
daemon status ⚪ ✔
daemon {stop,start,...} ⚪ ✔
device {ident,fault}-(on,off} ⚪ ✔
device ls ✔ ✔
iscsi add ⚪ ✔
mds add ⚪ ✔
nfs add ⚪ ✔
rbd-mirror add ⚪ ✔
rgw add ⚪ ✔
ls ✔ ✔
ps ✔ ✔
status ✔ ✔
upgrade ❌ ✔
=================================== ====== =========
where
* ⚪ = not yet implemented
* ❌ = not applicable
* ✔ = implemented
|
