66 lines
1.7 KiB
Plaintext
66 lines
1.7 KiB
Plaintext
QEMU Monitor Protocol
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=====================
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Introduction
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-------------
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The QEMU Monitor Protocol (QMP) allows applications to communicate with
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QEMU's Monitor.
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QMP is JSON[1] based and has the following features:
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- Lightweight, text-based, easy to parse data format
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- Asynchronous events support
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- Stability
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For more information, please, refer to the following files:
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o qmp-spec.txt QEMU Monitor Protocol current specification
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o qmp-events.txt List of available asynchronous events
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There are also two simple Python scripts available:
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o qmp-shell A shell
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o vm-info Show some information about the Virtual Machine
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[1] http://www.json.org
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Usage
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-----
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To enable QMP, QEMU has to be started in "control mode". There are
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two ways of doing this, the simplest one is using the the '-qmp'
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command-line option.
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For example:
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$ qemu [...] -qmp tcp:localhost:4444,server
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Will start QEMU in control mode, waiting for a client TCP connection
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on localhost port 4444.
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It is also possible to use the '-mon' command-line option to have
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more complex combinations. Please, refer to the QEMU's manpage for
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more information.
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Simple Testing
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--------------
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To manually test QMP one can connect with telnet and issue commands:
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$ telnet localhost 4444
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Trying 127.0.0.1...
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Connected to localhost.
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Escape character is '^]'.
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{"QMP": {"version": {"qemu": "0.12.50", "package": ""}, "capabilities": []}}
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{ "execute": "qmp_capabilities" }
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{"return": {}}
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{ "execute": "query-version" }
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{"return": {"qemu": "0.12.50", "package": ""}}
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Contact
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-------
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http://www.linux-kvm.org/page/MonitorProtocol
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Luiz Fernando N. Capitulino <lcapitulino@redhat.com>
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