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Ganeti remote API |
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================= |
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|
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Documents Ganeti version |version| |
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|
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.. contents:: |
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|
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Introduction |
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------------ |
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|
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Ganeti supports a remote API for enable external tools to easily |
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retrieve information about a cluster's state. The remote API daemon, |
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*ganeti-rapi*, is automatically started on the master node. By default |
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it runs on TCP port 5080, but this can be changed either in |
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``.../constants.py`` or via the command line parameter *-p*. SSL mode, |
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which is used by default, can also be disabled by passing command line |
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parameters. |
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|
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|
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Users and passwords |
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------------------- |
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|
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``ganeti-rapi`` reads users and passwords from a file (usually |
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``/var/lib/ganeti/rapi_users``) on startup. Changes to the file will be |
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read automatically. |
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|
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Each line consists of two or three fields separated by whitespace. The |
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first two fields are for username and password. The third field is |
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optional and can be used to specify per-user options. Currently, |
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``write`` is the only option supported and enables the user to execute |
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operations modifying the cluster. Lines starting with the hash sign |
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(``#``) are treated as comments. |
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|
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Passwords can either be written in clear text or as a hash. Clear text |
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passwords may not start with an opening brace (``{``) or they must be |
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prefixed with ``{cleartext}``. To use the hashed form, get the MD5 hash |
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of the string ``$username:Ganeti Remote API:$password`` (e.g. ``echo -n |
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'jack:Ganeti Remote API:abc123' | openssl md5``) [#pwhash]_ and prefix |
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it with ``{ha1}``. Using the scheme prefix for all passwords is |
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recommended. Scheme prefixes are not case sensitive. |
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|
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Example:: |
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|
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# Give Jack and Fred read-only access |
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jack abc123 |
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fred {cleartext}foo555 |
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|
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# Give write access to an imaginary instance creation script |
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autocreator xyz789 write |
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|
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# Hashed password for Jessica |
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jessica {HA1}7046452df2cbb530877058712cf17bd4 write |
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|
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|
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.. [#pwhash] Using the MD5 hash of username, realm and password is |
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described in :rfc:`2617` ("HTTP Authentication"), sections 3.2.2.2 and |
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3.3. The reason for using it over another algorithm is forward |
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compatibility. If ``ganeti-rapi`` were to implement HTTP Digest |
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authentication in the future, the same hash could be used. |
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In the current version ``ganeti-rapi``'s realm, ``Ganeti Remote |
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API``, can only be changed by modifying the source code. |
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|
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|
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Protocol |
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-------- |
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|
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The protocol used is JSON_ over HTTP designed after the REST_ principle. |
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HTTP Basic authentication as per :rfc:`2617` is supported. |
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|
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.. _JSON: http://www.json.org/ |
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.. _REST: http://en.wikipedia.org/wiki/Representational_State_Transfer |
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|
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|
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A note on JSON as used by RAPI |
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++++++++++++++++++++++++++++++ |
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|
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JSON_ as used by Ganeti RAPI does not conform to the specification in |
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:rfc:`4627`. Section 2 defines a JSON text to be either an object |
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(``{"key": "value", …}``) or an array (``[1, 2, 3, …]``). In violation |
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of this RAPI uses plain strings (``"master-candidate"``, ``"1234"``) for |
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some requests or responses. Changing this now would likely break |
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existing clients and cause a lot of trouble. |
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|
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.. highlight:: ruby |
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|
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Unlike Python's `JSON encoder and decoder |
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<http://docs.python.org/library/json.html>`_, other programming |
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languages or libraries may only provide a strict implementation, not |
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allowing plain values. For those, responses can usually be wrapped in an |
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array whose first element is then used, e.g. the response ``"1234"`` |
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becomes ``["1234"]``. This works equally well for more complex values. |
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Example in Ruby:: |
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|
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require "json" |
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|
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# Insert code to get response here |
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response = "\"1234\"" |
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|
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decoded = JSON.parse("[#{response}]").first |
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|
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Short of modifying the encoder to allow encoding to a less strict |
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format, requests will have to be formatted by hand. Newer RAPI requests |
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already use a dictionary as their input data and shouldn't cause any |
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problems. |
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|
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|
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PUT or POST? |
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------------ |
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|
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According to :rfc:`2616` the main difference between PUT and POST is |
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that POST can create new resources but PUT can only create the resource |
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the URI was pointing to on the PUT request. |
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|
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Unfortunately, due to historic reasons, the Ganeti RAPI library is not |
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consistent with this usage, so just use the methods as documented below |
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for each resource. |
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|
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For more details have a look in the source code at |
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``lib/rapi/rlib2.py``. |
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|
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|
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Generic parameter types |
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----------------------- |
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|
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A few generic refered parameter types and the values they allow. |
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|
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``bool`` |
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++++++++ |
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|
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A boolean option will accept ``1`` or ``0`` as numbers but not |
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i.e. ``True`` or ``False``. |
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|
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Generic parameters |
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------------------ |
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|
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A few parameter mean the same thing across all resources which implement |
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it. |
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|
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``bulk`` |
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++++++++ |
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|
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Bulk-mode means that for the resources which usually return just a list |
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of child resources (e.g. ``/2/instances`` which returns just instance |
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names), the output will instead contain detailed data for all these |
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subresources. This is more efficient than query-ing the sub-resources |
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themselves. |
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|
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``dry-run`` |
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+++++++++++ |
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|
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The boolean *dry-run* argument, if provided and set, signals to Ganeti |
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that the job should not be executed, only the pre-execution checks will |
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be done. |
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|
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This is useful in trying to determine (without guarantees though, as in |
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the meantime the cluster state could have changed) if the operation is |
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likely to succeed or at least start executing. |
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|
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``force`` |
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+++++++++++ |
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|
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Force operation to continue even if it will cause the cluster to become |
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inconsistent (e.g. because there are not enough master candidates). |
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|
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Usage examples |
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-------------- |
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|
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You can access the API using your favorite programming language as long |
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as it supports network connections. |
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|
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Ganeti RAPI client |
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++++++++++++++++++ |
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|
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Ganeti includes a standalone RAPI client, ``lib/rapi/client.py``. |
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|
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Shell |
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+++++ |
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|
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.. highlight:: sh |
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|
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Using wget:: |
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|
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wget -q -O - https://CLUSTERNAME:5080/2/info |
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|
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or curl:: |
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|
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curl https://CLUSTERNAME:5080/2/info |
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|
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|
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Python |
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++++++ |
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|
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.. highlight:: python |
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|
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:: |
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|
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import urllib2 |
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f = urllib2.urlopen('https://CLUSTERNAME:5080/2/info') |
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print f.read() |
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|
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|
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JavaScript |
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++++++++++ |
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|
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.. warning:: While it's possible to use JavaScript, it poses several |
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potential problems, including browser blocking request due to |
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non-standard ports or different domain names. Fetching the data on |
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the webserver is easier. |
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|
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.. highlight:: javascript |
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|
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:: |
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|
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var url = 'https://CLUSTERNAME:5080/2/info'; |
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var info; |
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var xmlreq = new XMLHttpRequest(); |
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xmlreq.onreadystatechange = function () { |
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if (xmlreq.readyState != 4) return; |
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if (xmlreq.status == 200) { |
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info = eval("(" + xmlreq.responseText + ")"); |
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alert(info); |
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} else { |
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alert('Error fetching cluster info'); |
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} |
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xmlreq = null; |
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}; |
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xmlreq.open('GET', url, true); |
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xmlreq.send(null); |
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|
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Resources |
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--------- |
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|
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.. highlight:: javascript |
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|
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``/`` |
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+++++ |
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|
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The root resource. |
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|
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It supports the following commands: ``GET``. |
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|
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``GET`` |
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~~~~~~~ |
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|
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Shows the list of mapped resources. |
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|
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Returns: a dictionary with 'name' and 'uri' keys for each of them. |
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|
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``/2`` |
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++++++ |
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|
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The ``/2`` resource, the root of the version 2 API. |
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|
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It supports the following commands: ``GET``. |
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|
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``GET`` |
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~~~~~~~ |
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|
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Show the list of mapped resources. |
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|
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Returns: a dictionary with ``name`` and ``uri`` keys for each of them. |
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|
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``/2/info`` |
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+++++++++++ |
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|
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Cluster information resource. |
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|
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It supports the following commands: ``GET``. |
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|
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``GET`` |
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~~~~~~~ |
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|
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Returns cluster information. |
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|
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Example:: |
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|
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{ |
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"config_version": 2000000, |
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"name": "cluster", |
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"software_version": "2.0.0~beta2", |
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"os_api_version": 10, |
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"export_version": 0, |
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"candidate_pool_size": 10, |
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"enabled_hypervisors": [ |
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"fake" |
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], |
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"hvparams": { |
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"fake": {} |
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}, |
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"default_hypervisor": "fake", |
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"master": "node1.example.com", |
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"architecture": [ |
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"64bit", |
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"x86_64" |
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], |
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"protocol_version": 20, |
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"beparams": { |
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"default": { |
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"auto_balance": true, |
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"vcpus": 1, |
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"memory": 128 |
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} |
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} |
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} |
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|
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|
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``/2/redistribute-config`` |
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++++++++++++++++++++++++++ |
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|
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Redistribute configuration to all nodes. |
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|
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It supports the following commands: ``PUT``. |
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|
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``PUT`` |
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~~~~~~~ |
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|
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Redistribute configuration to all nodes. The result will be a job id. |
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|
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|
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``/2/features`` |
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+++++++++++++++ |
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|
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``GET`` |
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~~~~~~~ |
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|
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Returns a list of features supported by the RAPI server. Available |
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features: |
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|
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``instance-create-reqv1`` |
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Instance creation request data version 1 supported. |
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|
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|
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``/2/instances`` |
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++++++++++++++++ |
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|
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The instances resource. |
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|
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It supports the following commands: ``GET``, ``POST``. |
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|
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``GET`` |
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~~~~~~~ |
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|
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Returns a list of all available instances. |
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|
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Example:: |
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|
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[ |
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{ |
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"name": "web.example.com", |
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"uri": "\/instances\/web.example.com" |
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}, |
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{ |
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"name": "mail.example.com", |
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"uri": "\/instances\/mail.example.com" |
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} |
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] |
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|
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If the optional bool *bulk* argument is provided and set to a true value |
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(i.e ``?bulk=1``), the output contains detailed information about |
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instances as a list. |
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|
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Example:: |
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|
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[ |
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{ |
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"status": "running", |
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"disk_usage": 20480, |
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"nic.bridges": [ |
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"xen-br0" |
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], |
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"name": "web.example.com", |
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"tags": ["tag1", "tag2"], |
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"beparams": { |
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"vcpus": 2, |
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"memory": 512 |
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}, |
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"disk.sizes": [ |
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20480 |
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], |
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"pnode": "node1.example.com", |
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"nic.macs": ["01:23:45:67:89:01"], |
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"snodes": ["node2.example.com"], |
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"disk_template": "drbd", |
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"admin_state": true, |
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"os": "debian-etch", |
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"oper_state": true |
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}, |
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... |
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] |
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|
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|
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``POST`` |
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~~~~~~~~ |
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|
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Creates an instance. |
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|
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If the optional bool *dry-run* argument is provided, the job will not be |
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actually executed, only the pre-execution checks will be done. Query-ing |
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the job result will return, in both dry-run and normal case, the list of |
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nodes selected for the instance. |
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|
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Returns: a job ID that can be used later for polling. |
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|
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Body parameters: |
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|
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``__version__`` (int, required) |
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Must be ``1`` (older Ganeti versions used a different format for |
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instance creation requests, version ``0``, but that format is not |
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documented). |
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``mode`` (string, required) |
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Instance creation mode. |
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``name`` (string, required) |
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Instance name. |
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``disk_template`` (string, required) |
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Disk template for instance. |
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``disks`` (list, required) |
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List of disk definitions. Example: ``[{"size": 100}, {"size": 5}]``. |
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Each disk definition must contain a ``size`` value and can contain an |
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optional ``mode`` value denoting the disk access mode (``ro`` or |
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``rw``). |
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``nics`` (list, required) |
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List of NIC (network interface) definitions. Example: ``[{}, {}, |
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{"ip": "198.51.100.4"}]``. Each NIC definition can contain the |
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optional values ``ip``, ``mode``, ``link`` and ``bridge``. |
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``os`` (string, required) |
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Instance operating system. |
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``osparams`` (dictionary) |
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Dictionary with OS parameters. If not valid for the given OS, the job |
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will fail. |
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``force_variant`` (bool) |
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Whether to force an unknown variant. |
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``pnode`` (string) |
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Primary node. |
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``snode`` (string) |
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Secondary node. |
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``src_node`` (string) |
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Source node for import. |
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``src_path`` (string) |
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Source directory for import. |
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``start`` (bool) |
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Whether to start instance after creation. |
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``ip_check`` (bool) |
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Whether to ensure instance's IP address is inactive. |
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``name_check`` (bool) |
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Whether to ensure instance's name is resolvable. |
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``file_storage_dir`` (string) |
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File storage directory. |
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``file_driver`` (string) |
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File storage driver. |
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``iallocator`` (string) |
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Instance allocator name. |
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``source_handshake`` (list) |
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Signed handshake from source (remote import only). |
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``source_x509_ca`` (string) |
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Source X509 CA in PEM format (remote import only). |
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``source_instance_name`` (string) |
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Source instance name (remote import only). |
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``hypervisor`` (string) |
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Hypervisor name. |
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``hvparams`` (dict) |
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Hypervisor parameters, hypervisor-dependent. |
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``beparams`` (dict) |
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Backend parameters. |
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|
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|
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``/2/instances/[instance_name]`` |
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++++++++++++++++++++++++++++++++ |
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|
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Instance-specific resource. |
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|
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It supports the following commands: ``GET``, ``DELETE``. |
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|
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``GET`` |
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~~~~~~~ |
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|
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Returns information about an instance, similar to the bulk output from |
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the instance list. |
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|
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``DELETE`` |
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~~~~~~~~~~ |
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|
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Deletes an instance. |
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|
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It supports the ``dry-run`` argument. |
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|
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|
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``/2/instances/[instance_name]/info`` |
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+++++++++++++++++++++++++++++++++++++++ |
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|
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It supports the following commands: ``GET``. |
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|
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``GET`` |
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~~~~~~~ |
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|
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Requests detailed information about the instance. An optional parameter, |
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``static`` (bool), can be set to return only static information from the |
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configuration without querying the instance's nodes. The result will be |
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a job id. |
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|
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|
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``/2/instances/[instance_name]/reboot`` |
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+++++++++++++++++++++++++++++++++++++++ |
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|
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Reboots URI for an instance. |
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|
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It supports the following commands: ``POST``. |
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|
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``POST`` |
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~~~~~~~~ |
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|
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Reboots the instance. |
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|
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The URI takes optional ``type=soft|hard|full`` and |
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``ignore_secondaries=0|1`` parameters. |
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|
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``type`` defines the reboot type. ``soft`` is just a normal reboot, |
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without terminating the hypervisor. ``hard`` means full shutdown |
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(including terminating the hypervisor process) and startup again. |
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``full`` is like ``hard`` but also recreates the configuration from |
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ground up as if you would have done a ``gnt-instance shutdown`` and |
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``gnt-instance start`` on it. |
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|
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``ignore_secondaries`` is a bool argument indicating if we start the |
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instance even if secondary disks are failing. |
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|
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It supports the ``dry-run`` argument. |
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|
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|
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``/2/instances/[instance_name]/shutdown`` |
530 |
+++++++++++++++++++++++++++++++++++++++++ |
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|
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Instance shutdown URI. |
533 |
|
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It supports the following commands: ``PUT``. |
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|
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``PUT`` |
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~~~~~~~ |
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|
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Shutdowns an instance. |
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|
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It supports the ``dry-run`` argument. |
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|
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|
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``/2/instances/[instance_name]/startup`` |
545 |
++++++++++++++++++++++++++++++++++++++++ |
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|
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Instance startup URI. |
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|
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It supports the following commands: ``PUT``. |
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|
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``PUT`` |
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~~~~~~~ |
553 |
|
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Startup an instance. |
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|
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The URI takes an optional ``force=1|0`` parameter to start the |
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instance even if secondary disks are failing. |
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|
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It supports the ``dry-run`` argument. |
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|
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``/2/instances/[instance_name]/reinstall`` |
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++++++++++++++++++++++++++++++++++++++++++++++ |
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|
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Installs the operating system again. |
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|
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It supports the following commands: ``POST``. |
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|
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``POST`` |
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~~~~~~~~ |
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|
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Takes the parameters ``os`` (OS template name) and ``nostartup`` (bool). |
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|
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|
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``/2/instances/[instance_name]/replace-disks`` |
575 |
++++++++++++++++++++++++++++++++++++++++++++++ |
576 |
|
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Replaces disks on an instance. |
578 |
|
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It supports the following commands: ``POST``. |
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|
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``POST`` |
582 |
~~~~~~~~ |
583 |
|
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Takes the parameters ``mode`` (one of ``replace_on_primary``, |
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``replace_on_secondary``, ``replace_new_secondary`` or |
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``replace_auto``), ``disks`` (comma separated list of disk indexes), |
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``remote_node`` and ``iallocator``. |
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|
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Either ``remote_node`` or ``iallocator`` needs to be defined when using |
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``mode=replace_new_secondary``. |
591 |
|
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``mode`` is a mandatory parameter. ``replace_auto`` tries to determine |
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the broken disk(s) on its own and replacing it. |
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|
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|
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``/2/instances/[instance_name]/activate-disks`` |
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+++++++++++++++++++++++++++++++++++++++++++++++ |
598 |
|
599 |
Activate disks on an instance. |
600 |
|
601 |
It supports the following commands: ``PUT``. |
602 |
|
603 |
``PUT`` |
604 |
~~~~~~~ |
605 |
|
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Takes the bool parameter ``ignore_size``. When set ignore the recorded |
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size (useful for forcing activation when recorded size is wrong). |
608 |
|
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|
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``/2/instances/[instance_name]/deactivate-disks`` |
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+++++++++++++++++++++++++++++++++++++++++++++++++ |
612 |
|
613 |
Deactivate disks on an instance. |
614 |
|
615 |
It supports the following commands: ``PUT``. |
616 |
|
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``PUT`` |
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~~~~~~~ |
619 |
|
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Takes no parameters. |
621 |
|
622 |
|
623 |
``/2/instances/[instance_name]/prepare-export`` |
624 |
+++++++++++++++++++++++++++++++++++++++++++++++++ |
625 |
|
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Prepares an export of an instance. |
627 |
|
628 |
It supports the following commands: ``PUT``. |
629 |
|
630 |
``PUT`` |
631 |
~~~~~~~ |
632 |
|
633 |
Takes one parameter, ``mode``, for the export mode. Returns a job ID. |
634 |
|
635 |
|
636 |
``/2/instances/[instance_name]/export`` |
637 |
+++++++++++++++++++++++++++++++++++++++++++++++++ |
638 |
|
639 |
Exports an instance. |
640 |
|
641 |
It supports the following commands: ``PUT``. |
642 |
|
643 |
``PUT`` |
644 |
~~~~~~~ |
645 |
|
646 |
Returns a job ID. |
647 |
|
648 |
Body parameters: |
649 |
|
650 |
``mode`` (string) |
651 |
Export mode. |
652 |
``destination`` (required) |
653 |
Destination information, depends on export mode. |
654 |
``shutdown`` (bool, required) |
655 |
Whether to shutdown instance before export. |
656 |
``remove_instance`` (bool) |
657 |
Whether to remove instance after export. |
658 |
``x509_key_name`` |
659 |
Name of X509 key (remote export only). |
660 |
``destination_x509_ca`` |
661 |
Destination X509 CA (remote export only). |
662 |
|
663 |
|
664 |
``/2/instances/[instance_name]/migrate`` |
665 |
++++++++++++++++++++++++++++++++++++++++ |
666 |
|
667 |
Migrates an instance. |
668 |
|
669 |
Supports the following commands: ``PUT``. |
670 |
|
671 |
``PUT`` |
672 |
~~~~~~~ |
673 |
|
674 |
Returns a job ID. |
675 |
|
676 |
Body parameters: |
677 |
|
678 |
``mode`` (string) |
679 |
Migration mode. |
680 |
``cleanup`` (bool) |
681 |
Whether a previously failed migration should be cleaned up. |
682 |
|
683 |
|
684 |
``/2/instances/[instance_name]/rename`` |
685 |
++++++++++++++++++++++++++++++++++++++++ |
686 |
|
687 |
Renames an instance. |
688 |
|
689 |
Supports the following commands: ``PUT``. |
690 |
|
691 |
``PUT`` |
692 |
~~~~~~~ |
693 |
|
694 |
Returns a job ID. |
695 |
|
696 |
Body parameters: |
697 |
|
698 |
``new_name`` (string, required) |
699 |
New instance name. |
700 |
``ip_check`` (bool) |
701 |
Whether to ensure instance's IP address is inactive. |
702 |
``name_check`` (bool) |
703 |
Whether to ensure instance's name is resolvable. |
704 |
|
705 |
|
706 |
``/2/instances/[instance_name]/modify`` |
707 |
++++++++++++++++++++++++++++++++++++++++ |
708 |
|
709 |
Modifies an instance. |
710 |
|
711 |
Supports the following commands: ``PUT``. |
712 |
|
713 |
``PUT`` |
714 |
~~~~~~~ |
715 |
|
716 |
Returns a job ID. |
717 |
|
718 |
Body parameters: |
719 |
|
720 |
``osparams`` (dict) |
721 |
Dictionary with OS parameters. |
722 |
``hvparams`` (dict) |
723 |
Hypervisor parameters, hypervisor-dependent. |
724 |
``beparams`` (dict) |
725 |
Backend parameters. |
726 |
``force`` (bool) |
727 |
Whether to force the operation. |
728 |
``nics`` (list) |
729 |
List of NIC changes. Each item is of the form ``(op, settings)``. |
730 |
``op`` can be ``add`` to add a new NIC with the specified settings, |
731 |
``remove`` to remove the last NIC or a number to modify the settings |
732 |
of the NIC with that index. |
733 |
``disks`` (list) |
734 |
List of disk changes. See ``nics``. |
735 |
``disk_template`` (string) |
736 |
Disk template for instance. |
737 |
``remote_node`` (string) |
738 |
Secondary node (used when changing disk template). |
739 |
``os_name`` (string) |
740 |
Change instance's OS name. Does not reinstall the instance. |
741 |
``force_variant`` (bool) |
742 |
Whether to force an unknown variant. |
743 |
|
744 |
|
745 |
``/2/instances/[instance_name]/tags`` |
746 |
+++++++++++++++++++++++++++++++++++++ |
747 |
|
748 |
Manages per-instance tags. |
749 |
|
750 |
It supports the following commands: ``GET``, ``PUT``, ``DELETE``. |
751 |
|
752 |
``GET`` |
753 |
~~~~~~~ |
754 |
|
755 |
Returns a list of tags. |
756 |
|
757 |
Example:: |
758 |
|
759 |
["tag1", "tag2", "tag3"] |
760 |
|
761 |
``PUT`` |
762 |
~~~~~~~ |
763 |
|
764 |
Add a set of tags. |
765 |
|
766 |
The request as a list of strings should be ``PUT`` to this URI. The |
767 |
result will be a job id. |
768 |
|
769 |
It supports the ``dry-run`` argument. |
770 |
|
771 |
|
772 |
``DELETE`` |
773 |
~~~~~~~~~~ |
774 |
|
775 |
Delete a tag. |
776 |
|
777 |
In order to delete a set of tags, the DELETE request should be addressed |
778 |
to URI like:: |
779 |
|
780 |
/tags?tag=[tag]&tag=[tag] |
781 |
|
782 |
It supports the ``dry-run`` argument. |
783 |
|
784 |
|
785 |
``/2/jobs`` |
786 |
+++++++++++ |
787 |
|
788 |
The ``/2/jobs`` resource. |
789 |
|
790 |
It supports the following commands: ``GET``. |
791 |
|
792 |
``GET`` |
793 |
~~~~~~~ |
794 |
|
795 |
Returns a dictionary of jobs. |
796 |
|
797 |
Returns: a dictionary with jobs id and uri. |
798 |
|
799 |
``/2/jobs/[job_id]`` |
800 |
++++++++++++++++++++ |
801 |
|
802 |
|
803 |
Individual job URI. |
804 |
|
805 |
It supports the following commands: ``GET``, ``DELETE``. |
806 |
|
807 |
``GET`` |
808 |
~~~~~~~ |
809 |
|
810 |
Returns a job status. |
811 |
|
812 |
Returns: a dictionary with job parameters. |
813 |
|
814 |
The result includes: |
815 |
|
816 |
- id: job ID as a number |
817 |
- status: current job status as a string |
818 |
- ops: involved OpCodes as a list of dictionaries for each opcodes in |
819 |
the job |
820 |
- opstatus: OpCodes status as a list |
821 |
- opresult: OpCodes results as a list |
822 |
|
823 |
For a successful opcode, the ``opresult`` field corresponding to it will |
824 |
contain the raw result from its :term:`LogicalUnit`. In case an opcode |
825 |
has failed, its element in the opresult list will be a list of two |
826 |
elements: |
827 |
|
828 |
- first element the error type (the Ganeti internal error name) |
829 |
- second element a list of either one or two elements: |
830 |
|
831 |
- the first element is the textual error description |
832 |
- the second element, if any, will hold an error classification |
833 |
|
834 |
The error classification is most useful for the ``OpPrereqError`` |
835 |
error type - these errors happen before the OpCode has started |
836 |
executing, so it's possible to retry the OpCode without side |
837 |
effects. But whether it make sense to retry depends on the error |
838 |
classification: |
839 |
|
840 |
``resolver_error`` |
841 |
Resolver errors. This usually means that a name doesn't exist in DNS, |
842 |
so if it's a case of slow DNS propagation the operation can be retried |
843 |
later. |
844 |
|
845 |
``insufficient_resources`` |
846 |
Not enough resources (iallocator failure, disk space, memory, |
847 |
etc.). If the resources on the cluster increase, the operation might |
848 |
succeed. |
849 |
|
850 |
``wrong_input`` |
851 |
Wrong arguments (at syntax level). The operation will not ever be |
852 |
accepted unless the arguments change. |
853 |
|
854 |
``wrong_state`` |
855 |
Wrong entity state. For example, live migration has been requested for |
856 |
a down instance, or instance creation on an offline node. The |
857 |
operation can be retried once the resource has changed state. |
858 |
|
859 |
``unknown_entity`` |
860 |
Entity not found. For example, information has been requested for an |
861 |
unknown instance. |
862 |
|
863 |
``already_exists`` |
864 |
Entity already exists. For example, instance creation has been |
865 |
requested for an already-existing instance. |
866 |
|
867 |
``resource_not_unique`` |
868 |
Resource not unique (e.g. MAC or IP duplication). |
869 |
|
870 |
``internal_error`` |
871 |
Internal cluster error. For example, a node is unreachable but not set |
872 |
offline, or the ganeti node daemons are not working, etc. A |
873 |
``gnt-cluster verify`` should be run. |
874 |
|
875 |
``environment_error`` |
876 |
Environment error (e.g. node disk error). A ``gnt-cluster verify`` |
877 |
should be run. |
878 |
|
879 |
Note that in the above list, by entity we refer to a node or instance, |
880 |
while by a resource we refer to an instance's disk, or NIC, etc. |
881 |
|
882 |
|
883 |
``DELETE`` |
884 |
~~~~~~~~~~ |
885 |
|
886 |
Cancel a not-yet-started job. |
887 |
|
888 |
|
889 |
``/2/jobs/[job_id]/wait`` |
890 |
+++++++++++++++++++++++++ |
891 |
|
892 |
``GET`` |
893 |
~~~~~~~ |
894 |
|
895 |
Waits for changes on a job. Takes the following body parameters in a |
896 |
dict: |
897 |
|
898 |
``fields`` |
899 |
The job fields on which to watch for changes. |
900 |
|
901 |
``previous_job_info`` |
902 |
Previously received field values or None if not yet available. |
903 |
|
904 |
``previous_log_serial`` |
905 |
Highest log serial number received so far or None if not yet |
906 |
available. |
907 |
|
908 |
Returns None if no changes have been detected and a dict with two keys, |
909 |
``job_info`` and ``log_entries`` otherwise. |
910 |
|
911 |
|
912 |
``/2/nodes`` |
913 |
++++++++++++ |
914 |
|
915 |
Nodes resource. |
916 |
|
917 |
It supports the following commands: ``GET``. |
918 |
|
919 |
``GET`` |
920 |
~~~~~~~ |
921 |
|
922 |
Returns a list of all nodes. |
923 |
|
924 |
Example:: |
925 |
|
926 |
[ |
927 |
{ |
928 |
"id": "node1.example.com", |
929 |
"uri": "\/nodes\/node1.example.com" |
930 |
}, |
931 |
{ |
932 |
"id": "node2.example.com", |
933 |
"uri": "\/nodes\/node2.example.com" |
934 |
} |
935 |
] |
936 |
|
937 |
If the optional 'bulk' argument is provided and set to 'true' value (i.e |
938 |
'?bulk=1'), the output contains detailed information about nodes as a |
939 |
list. |
940 |
|
941 |
Example:: |
942 |
|
943 |
[ |
944 |
{ |
945 |
"pinst_cnt": 1, |
946 |
"mfree": 31280, |
947 |
"mtotal": 32763, |
948 |
"name": "www.example.com", |
949 |
"tags": [], |
950 |
"mnode": 512, |
951 |
"dtotal": 5246208, |
952 |
"sinst_cnt": 2, |
953 |
"dfree": 5171712, |
954 |
"offline": false |
955 |
}, |
956 |
... |
957 |
] |
958 |
|
959 |
``/2/nodes/[node_name]`` |
960 |
+++++++++++++++++++++++++++++++++ |
961 |
|
962 |
Returns information about a node. |
963 |
|
964 |
It supports the following commands: ``GET``. |
965 |
|
966 |
``/2/nodes/[node_name]/evacuate`` |
967 |
+++++++++++++++++++++++++++++++++ |
968 |
|
969 |
Evacuates all secondary instances off a node. |
970 |
|
971 |
It supports the following commands: ``POST``. |
972 |
|
973 |
``POST`` |
974 |
~~~~~~~~ |
975 |
|
976 |
To evacuate a node, either one of the ``iallocator`` or ``remote_node`` |
977 |
parameters must be passed:: |
978 |
|
979 |
evacuate?iallocator=[iallocator] |
980 |
evacuate?remote_node=[nodeX.example.com] |
981 |
|
982 |
The result value will be a list, each element being a triple of the job |
983 |
id (for this specific evacuation), the instance which is being evacuated |
984 |
by this job, and the node to which it is being relocated. In case the |
985 |
node is already empty, the result will be an empty list (without any |
986 |
jobs being submitted). |
987 |
|
988 |
And additional parameter ``early_release`` signifies whether to try to |
989 |
parallelize the evacuations, at the risk of increasing I/O contention |
990 |
and increasing the chances of data loss, if the primary node of any of |
991 |
the instances being evacuated is not fully healthy. |
992 |
|
993 |
If the dry-run parameter was specified, then the evacuation jobs were |
994 |
not actually submitted, and the job IDs will be null. |
995 |
|
996 |
|
997 |
``/2/nodes/[node_name]/migrate`` |
998 |
+++++++++++++++++++++++++++++++++ |
999 |
|
1000 |
Migrates all primary instances from a node. |
1001 |
|
1002 |
It supports the following commands: ``POST``. |
1003 |
|
1004 |
``POST`` |
1005 |
~~~~~~~~ |
1006 |
|
1007 |
If no mode is explicitly specified, each instances' hypervisor default |
1008 |
migration mode will be used. Query parameters: |
1009 |
|
1010 |
``live`` (bool) |
1011 |
If set, use live migration if available. |
1012 |
``mode`` (string) |
1013 |
Sets migration mode, ``live`` for live migration and ``non-live`` for |
1014 |
non-live migration. Supported by Ganeti 2.2 and above. |
1015 |
|
1016 |
|
1017 |
``/2/nodes/[node_name]/role`` |
1018 |
+++++++++++++++++++++++++++++ |
1019 |
|
1020 |
Manages node role. |
1021 |
|
1022 |
It supports the following commands: ``GET``, ``PUT``. |
1023 |
|
1024 |
The role is always one of the following: |
1025 |
|
1026 |
- drained |
1027 |
- master |
1028 |
- master-candidate |
1029 |
- offline |
1030 |
- regular |
1031 |
|
1032 |
``GET`` |
1033 |
~~~~~~~ |
1034 |
|
1035 |
Returns the current node role. |
1036 |
|
1037 |
Example:: |
1038 |
|
1039 |
"master-candidate" |
1040 |
|
1041 |
``PUT`` |
1042 |
~~~~~~~ |
1043 |
|
1044 |
Change the node role. |
1045 |
|
1046 |
The request is a string which should be PUT to this URI. The result will |
1047 |
be a job id. |
1048 |
|
1049 |
It supports the bool ``force`` argument. |
1050 |
|
1051 |
``/2/nodes/[node_name]/storage`` |
1052 |
++++++++++++++++++++++++++++++++ |
1053 |
|
1054 |
Manages storage units on the node. |
1055 |
|
1056 |
``GET`` |
1057 |
~~~~~~~ |
1058 |
|
1059 |
Requests a list of storage units on a node. Requires the parameters |
1060 |
``storage_type`` (one of ``file``, ``lvm-pv`` or ``lvm-vg``) and |
1061 |
``output_fields``. The result will be a job id, using which the result |
1062 |
can be retrieved. |
1063 |
|
1064 |
``/2/nodes/[node_name]/storage/modify`` |
1065 |
+++++++++++++++++++++++++++++++++++++++ |
1066 |
|
1067 |
Modifies storage units on the node. |
1068 |
|
1069 |
``PUT`` |
1070 |
~~~~~~~ |
1071 |
|
1072 |
Modifies parameters of storage units on the node. Requires the |
1073 |
parameters ``storage_type`` (one of ``file``, ``lvm-pv`` or ``lvm-vg``) |
1074 |
and ``name`` (name of the storage unit). Parameters can be passed |
1075 |
additionally. Currently only ``allocatable`` (bool) is supported. The |
1076 |
result will be a job id. |
1077 |
|
1078 |
``/2/nodes/[node_name]/storage/repair`` |
1079 |
+++++++++++++++++++++++++++++++++++++++ |
1080 |
|
1081 |
Repairs a storage unit on the node. |
1082 |
|
1083 |
``PUT`` |
1084 |
~~~~~~~ |
1085 |
|
1086 |
Repairs a storage unit on the node. Requires the parameters |
1087 |
``storage_type`` (currently only ``lvm-vg`` can be repaired) and |
1088 |
``name`` (name of the storage unit). The result will be a job id. |
1089 |
|
1090 |
``/2/nodes/[node_name]/tags`` |
1091 |
+++++++++++++++++++++++++++++ |
1092 |
|
1093 |
Manages per-node tags. |
1094 |
|
1095 |
It supports the following commands: ``GET``, ``PUT``, ``DELETE``. |
1096 |
|
1097 |
``GET`` |
1098 |
~~~~~~~ |
1099 |
|
1100 |
Returns a list of tags. |
1101 |
|
1102 |
Example:: |
1103 |
|
1104 |
["tag1", "tag2", "tag3"] |
1105 |
|
1106 |
``PUT`` |
1107 |
~~~~~~~ |
1108 |
|
1109 |
Add a set of tags. |
1110 |
|
1111 |
The request as a list of strings should be PUT to this URI. The result |
1112 |
will be a job id. |
1113 |
|
1114 |
It supports the ``dry-run`` argument. |
1115 |
|
1116 |
``DELETE`` |
1117 |
~~~~~~~~~~ |
1118 |
|
1119 |
Deletes tags. |
1120 |
|
1121 |
In order to delete a set of tags, the DELETE request should be addressed |
1122 |
to URI like:: |
1123 |
|
1124 |
/tags?tag=[tag]&tag=[tag] |
1125 |
|
1126 |
It supports the ``dry-run`` argument. |
1127 |
|
1128 |
|
1129 |
``/2/os`` |
1130 |
+++++++++ |
1131 |
|
1132 |
OS resource. |
1133 |
|
1134 |
It supports the following commands: ``GET``. |
1135 |
|
1136 |
``GET`` |
1137 |
~~~~~~~ |
1138 |
|
1139 |
Return a list of all OSes. |
1140 |
|
1141 |
Can return error 500 in case of a problem. Since this is a costly |
1142 |
operation for Ganeti 2.0, it is not recommended to execute it too often. |
1143 |
|
1144 |
Example:: |
1145 |
|
1146 |
["debian-etch"] |
1147 |
|
1148 |
``/2/tags`` |
1149 |
+++++++++++ |
1150 |
|
1151 |
Manages cluster tags. |
1152 |
|
1153 |
It supports the following commands: ``GET``, ``PUT``, ``DELETE``. |
1154 |
|
1155 |
``GET`` |
1156 |
~~~~~~~ |
1157 |
|
1158 |
Returns the cluster tags. |
1159 |
|
1160 |
Example:: |
1161 |
|
1162 |
["tag1", "tag2", "tag3"] |
1163 |
|
1164 |
``PUT`` |
1165 |
~~~~~~~ |
1166 |
|
1167 |
Adds a set of tags. |
1168 |
|
1169 |
The request as a list of strings should be PUT to this URI. The result |
1170 |
will be a job id. |
1171 |
|
1172 |
It supports the ``dry-run`` argument. |
1173 |
|
1174 |
|
1175 |
``DELETE`` |
1176 |
~~~~~~~~~~ |
1177 |
|
1178 |
Deletes tags. |
1179 |
|
1180 |
In order to delete a set of tags, the DELETE request should be addressed |
1181 |
to URI like:: |
1182 |
|
1183 |
/tags?tag=[tag]&tag=[tag] |
1184 |
|
1185 |
It supports the ``dry-run`` argument. |
1186 |
|
1187 |
|
1188 |
``/version`` |
1189 |
++++++++++++ |
1190 |
|
1191 |
The version resource. |
1192 |
|
1193 |
This resource should be used to determine the remote API version and to |
1194 |
adapt clients accordingly. |
1195 |
|
1196 |
It supports the following commands: ``GET``. |
1197 |
|
1198 |
``GET`` |
1199 |
~~~~~~~ |
1200 |
|
1201 |
Returns the remote API version. Ganeti 1.2 returned ``1`` and Ganeti 2.0 |
1202 |
returns ``2``. |
1203 |
|
1204 |
.. vim: set textwidth=72 : |
1205 |
.. Local Variables: |
1206 |
.. mode: rst |
1207 |
.. fill-column: 72 |
1208 |
.. End: |