mirror of https://gitee.com/openkylin/qemu.git
135 lines
3.1 KiB
ReStructuredText
135 lines
3.1 KiB
ReStructuredText
QEMU Guest Agent
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================
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Synopsis
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--------
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**qemu-ga** [*OPTIONS*]
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Description
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-----------
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The QEMU Guest Agent is a daemon intended to be run within virtual
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machines. It allows the hypervisor host to perform various operations
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in the guest, such as:
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- get information from the guest
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- set the guest's system time
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- read/write a file
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- sync and freeze the filesystems
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- suspend the guest
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- reconfigure guest local processors
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- set user's password
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- ...
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qemu-ga will read a system configuration file on startup (located at
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|CONFDIR|\ ``/qemu-ga.conf`` by default), then parse remaining
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configuration options on the command line. For the same key, the last
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option wins, but the lists accumulate (see below for configuration
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file format).
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Options
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-------
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.. program:: qemu-ga
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.. option:: -m, --method=METHOD
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Transport method: one of ``unix-listen``, ``virtio-serial``, or
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``isa-serial``, or ``vsock-listen`` (``virtio-serial`` is the default).
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.. option:: -p, --path=PATH
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Device/socket path (the default for virtio-serial is
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``/dev/virtio-ports/org.qemu.guest_agent.0``,
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the default for isa-serial is ``/dev/ttyS0``). Socket addresses for
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vsock-listen are written as ``<cid>:<port>``.
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.. option:: -l, --logfile=PATH
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Set log file path (default is stderr).
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.. option:: -f, --pidfile=PATH
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Specify pid file (default is ``/var/run/qemu-ga.pid``).
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.. option:: -F, --fsfreeze-hook=PATH
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Enable fsfreeze hook. Accepts an optional argument that specifies
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script to run on freeze/thaw. Script will be called with
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'freeze'/'thaw' arguments accordingly (default is
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|CONFDIR|\ ``/fsfreeze-hook``). If using -F with an argument, do
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not follow -F with a space (for example:
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``-F/var/run/fsfreezehook.sh``).
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.. option:: -t, --statedir=PATH
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Specify the directory to store state information (absolute paths only,
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default is ``/var/run``).
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.. option:: -v, --verbose
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Log extra debugging information.
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.. option:: -V, --version
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Print version information and exit.
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.. option:: -d, --daemon
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Daemonize after startup (detach from terminal).
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.. option:: -b, --blacklist=LIST
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Comma-separated list of RPCs to disable (no spaces, ``?`` to list
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available RPCs).
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.. option:: -D, --dump-conf
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Dump the configuration in a format compatible with ``qemu-ga.conf``
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and exit.
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.. option:: -h, --help
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Display this help and exit.
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Files
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-----
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The syntax of the ``qemu-ga.conf`` configuration file follows the
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Desktop Entry Specification, here is a quick summary: it consists of
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groups of key-value pairs, interspersed with comments.
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::
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# qemu-ga configuration sample
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[general]
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daemonize = 0
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pidfile = /var/run/qemu-ga.pid
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verbose = 0
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method = virtio-serial
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path = /dev/virtio-ports/org.qemu.guest_agent.0
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statedir = /var/run
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The list of keys follows the command line options:
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============= ===========
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Key Key type
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============= ===========
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daemon boolean
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method string
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path string
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logfile string
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pidfile string
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fsfreeze-hook string
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statedir string
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verbose boolean
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blacklist string list
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============= ===========
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See also
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--------
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:manpage:`qemu(1)`
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