mirror of https://github.com/ceph/ceph
157 lines
5.3 KiB
ReStructuredText
157 lines
5.3 KiB
ReStructuredText
restful plugin
|
|
==============
|
|
|
|
RESTful plugin offers the REST API access to the status of the cluster
|
|
over an SSL-secured connection.
|
|
|
|
Enabling
|
|
--------
|
|
|
|
The *restful* module is enabled with::
|
|
|
|
ceph mgr module enable restful
|
|
|
|
You will also need to configure an SSL certificate below before the
|
|
API endpoint is available. By default the module will accept HTTPS
|
|
requests on port ``8003`` on all IPv4 and IPv6 addresses on the host.
|
|
|
|
Securing
|
|
--------
|
|
|
|
All connections to *restful* are secured with SSL. You can generate a
|
|
self-signed certificate with the command::
|
|
|
|
ceph restful create-self-signed-cert
|
|
|
|
Note that with a self-signed certificate most clients will need a flag
|
|
to allow a connection and/or suppress warning messages. For example,
|
|
if the ``ceph-mgr`` daemon is on the same host,::
|
|
|
|
curl -k https://localhost:8003/
|
|
|
|
To properly secure a deployment, a certificate that is signed by the
|
|
organization's certificate authority should be used. For example, a key pair
|
|
can be generated with a command similar to::
|
|
|
|
openssl req -new -nodes -x509 \
|
|
-subj "/O=IT/CN=ceph-mgr-restful" \
|
|
-days 3650 -keyout restful.key -out restful.crt -extensions v3_ca
|
|
|
|
The ``restful.crt`` should then be signed by your organization's CA
|
|
(certificate authority). Once that is done, you can set it with::
|
|
|
|
ceph config-key set mgr/restful/$name/crt -i restful.crt
|
|
ceph config-key set mgr/restful/$name/key -i restful.key
|
|
|
|
where ``$name`` is the name of the ``ceph-mgr`` instance (usually the
|
|
hostname). If all manager instances are to share the same certificate,
|
|
you can leave off the ``$name`` portion::
|
|
|
|
ceph config-key set mgr/restful/crt -i restful.crt
|
|
ceph config-key set mgr/restful/key -i restful.key
|
|
|
|
|
|
Configuring IP and port
|
|
-----------------------
|
|
|
|
Like any other RESTful API endpoint, *restful* binds to an IP and
|
|
port. By default, the currently active ``ceph-mgr`` daemon will bind
|
|
to port 8003 and any available IPv4 or IPv6 address on the host.
|
|
|
|
Since each ``ceph-mgr`` hosts its own instance of *restful*, it may
|
|
also be necessary to configure them separately. The IP and port
|
|
can be changed via the configuration key facility::
|
|
|
|
ceph config-key set mgr/restful/$name/server_addr $IP
|
|
ceph config-key set mgr/restful/$name/server_port $PORT
|
|
|
|
where ``$name`` is the ID of the ceph-mgr daemon (usually the hostname).
|
|
|
|
These settings can also be configured cluster-wide and not manager
|
|
specific. For example,::
|
|
|
|
ceph config-key set mgr/restful/server_addr $IP
|
|
ceph config-key set mgr/restful/server_port $PORT
|
|
|
|
If the port is not configured, *restful* will bind to port ``8003``.
|
|
If the address it not configured, the *restful* will bind to ``::``,
|
|
which corresponds to all available IPv4 and IPv6 addresses.
|
|
|
|
Load balancer
|
|
-------------
|
|
|
|
Please note that *restful* will *only* start on the manager which
|
|
is active at that moment. Query the Ceph cluster status to see which
|
|
manager is active (e.g., ``ceph mgr dump``). In order to make the
|
|
API available via a consistent URL regardless of which manager
|
|
daemon is currently active, you may want to set up a load balancer
|
|
front-end to direct traffic to whichever manager endpoint is
|
|
available.
|
|
|
|
Available methods
|
|
-----------------
|
|
|
|
You can navigate to the ``/doc`` endpoint for full list of available
|
|
endpoints and HTTP methods implemented for each endpoint.
|
|
|
|
For example, if you want to use the PATCH method of the ``/osd/<id>``
|
|
endpoint to set the state ``up`` of the OSD id ``1``, you can use the
|
|
following curl command::
|
|
|
|
echo -En '{"up": true}' | curl --request PATCH --data @- --silent --insecure --user <user> 'https://<ceph-mgr>:<port>/osd/1'
|
|
|
|
or you can use python to do so::
|
|
|
|
$ python
|
|
>> import requests
|
|
>> result = requests.patch(
|
|
'https://<ceph-mgr>:<port>/osd/1',
|
|
json={"up": True},
|
|
auth=("<user>", "<password>")
|
|
)
|
|
>> print result.json()
|
|
|
|
Some of the other endpoints implemented in the *restful* module include
|
|
|
|
* ``/config/cluster``: **GET**
|
|
* ``/config/osd``: **GET**, **PATCH**
|
|
* ``/crush/rule``: **GET**
|
|
* ``/mon``: **GET**
|
|
* ``/osd``: **GET**
|
|
* ``/pool``: **GET**, **POST**
|
|
* ``/pool/<arg>``: **DELETE**, **GET**, **PATCH**
|
|
* ``/request``: **DELETE**, **GET**, **POST**
|
|
* ``/request/<arg>``: **DELETE**, **GET**
|
|
* ``/server``: **GET**
|
|
|
|
The ``/request`` endpoint
|
|
-------------------------
|
|
|
|
You can use the ``/request`` endpoint to poll the state of a request
|
|
you scheduled with any **DELETE**, **POST** or **PATCH** method. These
|
|
methods are by default asynchronous since it may take longer for them
|
|
to finish execution. You can modify this behaviour by appending
|
|
``?wait=1`` to the request url. The returned request will then always
|
|
be completed.
|
|
|
|
The **POST** method of the ``/request`` method provides a passthrough
|
|
for the ceph mon commands as defined in ``src/mon/MonCommands.h``.
|
|
Let's consider the following command::
|
|
|
|
COMMAND("osd ls " \
|
|
"name=epoch,type=CephInt,range=0,req=false", \
|
|
"show all OSD ids", "osd", "r", "cli,rest")
|
|
|
|
The **prefix** is **osd ls**. The optional argument's name is **epoch**
|
|
and it is of type ``CephInt``, i.e. ``integer``. This means that you
|
|
need to do the following **POST** request to schedule the command::
|
|
|
|
$ python
|
|
>> import requests
|
|
>> result = requests.post(
|
|
'https://<ceph-mgr>:<port>/request',
|
|
json={'prefix': 'osd ls', 'epoch': 0},
|
|
auth=("<user>", "<password>")
|
|
)
|
|
>> print result.json()
|