qubes-doc/services/mgmt1.md

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doc-full	Management API	/doc/mgmt1/	/doc/mgmt/

Management API

(This page is the current draft of the proposal. It is not implemented yet.)

The API should be implemented as a set of qrexec calls. This is to make it easy to set the policy using current mechanism.

The calls

call	dest	argument	inside	return	note
mgmt.vmclass.List	dom0	-	-	<class>\n
mgmt.vm.List	`dom0	`	-	-	<name> class=<class> state=<state>\n
mgmt.vm.Create.<class>	dom0	template	name=<name> label=<label>	-
mgmt.vm.CreateInPool.<class>	dom0	template	name=<name> label=<label> pool=<pool> pool:<volume>=<pool>	-	either use pool= to put all volumes there, or pool:<volume>= for individual volumes - both forms are not allowed at the same time
mgmt.vm.CreateTemplate	dom0	name	root.img	-
mgmt.vm.Clone	vm	-	name=<name>	-
mgmt.vm.CloneInPool	vm	-	name=<name> pool=<pool> pool:<volume>=<pool>	-	same as for mgmt.vm.CreateInPool
mgmt.vm.Remove	vm	-	-	-
mgmt.label.List	dom0	-	-	<property>\n
mgmt.label.Create	dom0	label	0xRRGGBB	-
mgmt.label.Get	dom0	label	-	0xRRGGBB
mgmt.label.Index	dom0	label	-	<label-index>
mgmt.label.Remove	dom0	label	-	-
mgmt.property.List	dom0	-	-	<property>\n
mgmt.property.Get	dom0	property	-	`default={yes	no} <br/>type={str
mgmt.property.Help	dom0	property	-	help
mgmt.property.HelpRst	dom0	property	-	help.rst
mgmt.property.Reset	dom0	property	-	-
mgmt.property.Set	dom0	property	value	-
mgmt.vm.property.List	vm	-	-	<property>\n
mgmt.vm.property.Get	vm	property	-	`default={yes	no} `
mgmt.vm.property.Help	vm	property	-	help
mgmt.vm.property.HelpRst	vm	property	-	help.rst
mgmt.vm.property.Reset	vm	property	-	-
mgmt.vm.property.Set	vm	property	value	-
mgmt.vm.feature.List	vm	-	-	<feature>\n
mgmt.vm.feature.Get	vm	feature	-	value
mgmt.vm.feature.CheckWithTemplate	vm	feature	-	value
mgmt.vm.feature.Remove	vm	feature	-	-
mgmt.vm.feature.Set	vm	feature	value	-
mgmt.vm.tag.List	vm	-	-	<tag>\n
mgmt.vm.tag.Get	vm	tag	-	0 or 1	retcode?
mgmt.vm.tag.Remove	vm	tag	-	-
mgmt.vm.tag.Set	vm	tag	-	-
mgmt.vm.firewall.Get	vm	-	-	<rule>\n	rules syntax as in firewall interface with addition of expire= and comment= options; comment= (if present) must be the last option
mgmt.vm.firewall.Set	vm	-	<rule>\n	-	set firewall rules, see mgmt.vm.firewall.Get for syntax
mgmt.vm.firewall.Flush	vm	-	-	-
mgmt.vm.firewall.SetPolicy	vm	-	`accept	drop`	-
mgmt.vm.firewall.GetPolicy	vm	-	-	`accept	drop`
mgmt.vm.firewall.Reload	vm	-	-	-	force reload firewall without changing any rule
mgmt.vm.device.<class>.Attach	vm	device	options	-	device is in form <backend-name>+<device-ident> optional options given in key=value format, separated with spaces; options can include persistent=yes to "persistently" attach the device (default is temporary)
mgmt.vm.device.<class>.Detach	vm	device	-	-	device is in form <backend-name>+<device-ident>
mgmt.vm.device.<class>.List	vm	-	-	<device> <options>\n
mgmt.vm.device.<class>.Available	vm	device-ident	-	<device-ident> <properties> description=<desc>\n	optional service argument may be used to get info about a single device, optional (device class specific) properties are in key=value form, description must be the last one and is the only one allowed to contain spaces; options can include persistent=yes for "persistently" attached devices (default is temporary)
mgmt.vm.microphone.Attach	vm	-	-	-
mgmt.vm.microphone.Detach	vm	-	-	-
mgmt.pool.List	dom0	-	-	<pool>\n
mgmt.pool.ListDrivers	dom0	-	-	<pool-driver> <property> ...\n	Properties allowed in mgmt.pool.Add
mgmt.pool.Info	dom0	pool	-	<property>=<value>\n
mgmt.pool.Add	dom0	driver	<property>=<value>\n	-
mgmt.pool.Remove	dom0	pool	-	-
mgmt.pool.volume.List	dom0	pool	-	volume id
mgmt.pool.volume.Info	dom0	pool	vid	<property>=<value>\n
mgmt.pool.volume.ListSnapshots	dom0	pool	vid	<snapshot>\n
mgmt.pool.volume.Snapshot	dom0	pool	vid	snapshot
mgmt.pool.volume.Revert	dom0	pool	<vid> <snapshot>	-
mgmt.pool.volume.Resize	dom0	pool	<vid> <size_in_bytes>	-
mgmt.pool.volume.Import	dom0	pool	<vid>\n<raw volume data>	-
mgmt.vm.volume.List	vm	-	-	<volume>\n	<volume> is per-VM volume name, <vid> is pool-unique volume id
mgmt.vm.volume.Info	vm	volume	-	<property>=<value>\n
mgmt.vm.volume.ListSnapshots	vm	volume	-	snapshot	duplicate of mgmt.pool.volume., but with other call params
mgmt.vm.volume.Snapshot	vm	volume	-	snapshot	id.
mgmt.vm.volume.Revert	vm	volume	snapshot	-	id.
mgmt.vm.volume.Resize	vm	volume	size_in_bytes	-	id.
mgmt.vm.volume.Import	vm	volume	raw volume data	-	id.
mgmt.vm.Start	vm	-	-	-
mgmt.vm.Shutdown	vm	-	-	-
mgmt.vm.Pause	vm	-	-	-
mgmt.vm.Unpause	vm	-	-	-
mgmt.vm.Kill	vm	-	-	-
mgmt.backup.Execute	dom0	config i	-	-	config in /etc/qubes/backup/<id>.conf
mgmt.backup.Info	dom0	?	content?	?
mgmt.backup.Restore	dom0	?	content	?
mgmt.Events	`dom0	vm`	-	-	events

Volume properties:

• pool
• vid
• size
• usage
• rw
• internal
• source
• save_on_stop
• snap_on_start

Returned messages

First byte of a message is a message type. This is 8 bit non-zero integer. Values start at 0x30 (48, '0', zero digit in ASCII) for readability in hexdump. Next byte must be 0x00 (a separator).

This alternatively can be thought of as zero-terminated string containing single ASCII digit.

OK (0)

30 00 <content>

Server will close the connection after delivering single message.

EVENT (1)

31 00 <subject> 00 <event> 00 ( <key> 00 <value> 00 )* 00

Events are returned as stream of messages in selected API calls. Normally server will not close the connection.

A method yielding events will not ever return a OK or EXCEPTION message.

When calling such method, it will produce an artificial event connection-established just after connection, to help avoiding race conditions during event handler registration.

EXCEPTION (2)

32 00 <type> 00 ( <traceback> )? 00 <format string> 00 ( <field> 00 )*

Server will close the connection.

Traceback may be empty, can be enabled server-side as part of debug mode. Delimiting zero-byte is always present.

Fields are should substituted into %-style format string, possibly after client-side translation, to form final message to be displayed unto user. Server does not by itself support translation.

Tags

• created-by-<vm>
• managed-by-<vm>
• backup-<id>

General notes

• there is no provision for qvm-run, but there already exists qubes.VMShell call
• generally actions *.List return a list of objects and have "object identifier" as first word in a row. Such action can be also called with "object identifier" in argument to get only a single entry (in the same format).
• closing qrexec connection normally does not interrupt running operation; this is important to avoid leaving the system in inconsistent state
• actual operation starts only after caller send all the parameters (including a payload), signaled by sending EOF mark; there is no support for interactive protocols, to keep the protocol reasonable simple

TODO

• something to configure/update policy
• notifications
  • how to constrain the events?
  • how to pass the parameters? maybe XML, since this is trusted anyway and parser may be complicated
• how to constrain the possible values for mgmt.vm.property.Set etc, like "you can change netvm, but you have to pick from this set"; this currently can be done by writing an extension
• a call for executing *.desktop file from /usr/share/applications, for use with appmenus without giving access to qubes.VMShell; currently this can be done by writing custom qrexec calls
• maybe some generator for .desktop for appmenus, which would wrap calls in qrexec-client-vm