QEMU Guest Agent — QEMU 4.2.0 documentation

# QEMU Guest Agent

## Synopsis

qemu-ga [OPTIONS]

## Description

The QEMU Guest Agent is a daemon intended to be run within virtual machines. It allows the hypervisor host to perform various operations in the guest, such as:

- get information from the guest

- set the guest’s system time

- read/write a file

- sync and freeze the filesystems

- suspend the guest

- reconfigure guest local processors

- set user’s password

- …

qemu-ga will read a system configuration file on startup (located at `/etc/qemu``/qemu-ga.conf` by default), then parse remaining configuration options on the command line. For the same key, the last option wins, but the lists accumulate (see below for configuration file format).

## Options

`-m````,` `--method``=METHOD`

  Transport method: one of `unix-listen`, `virtio-serial`, or `isa-serial` (`virtio-serial` is the default).

`-p````,` `--path``=PATH`

  Device/socket path (the default for virtio-serial is `/dev/virtio-ports/org.qemu.guest_agent.0`, the default for isa-serial is `/dev/ttyS0`)

`-l````,` `--logfile``=PATH`

  Set log file path (default is stderr).

`-f````,` `--pidfile``=PATH`

  Specify pid file (default is `/var/run/qemu-ga.pid`).

`-F````,` `--fsfreeze-hook``=PATH`

  Enable fsfreeze hook. Accepts an optional argument that specifies script to run on freeze/thaw. Script will be called with ‘freeze’/’thaw’ arguments accordingly (default is `/etc/qemu``/fsfreeze-hook`). If using -F with an argument, do not follow -F with a space (for example: `-F/var/run/fsfreezehook.sh`).

`-t````,` `--statedir``=PATH`

  Specify the directory to store state information (absolute paths only, default is `/var/run`).

`-v````,` `--verbose```

  Log extra debugging information.

`-V````,` `--version```

  Print version information and exit.

`-d````,` `--daemon```

  Daemonize after startup (detach from terminal).

`-b````,` `--blacklist``=LIST`

  Comma-separated list of RPCs to disable (no spaces, `?` to list available RPCs).

`-D````,` `--dump-conf```

  Dump the configuration in a format compatible with `qemu-ga.conf` and exit.

`-h````,` `--help```

  Display this help and exit.

## Files

The syntax of the `qemu-ga.conf` configuration file follows the Desktop Entry Specification, here is a quick summary: it consists of groups of key-value pairs, interspersed with comments.

    # qemu-ga configuration sample
    [general]
    daemonize = 0
    pidfile = /var/run/qemu-ga.pid
    verbose = 0
    method = virtio-serial
    path = /dev/virtio-ports/org.qemu.guest_agent.0
    statedir = /var/run

The list of keys follows the command line options:

Key | Key type
--- | ---
daemon | boolean
method | string
path | string
logfile | string
pidfile | string
fsfreeze-hook | string
statedir | string
verbose | boolean
blacklist | string list

## See also

qemu(1)