主机guest agent异常提示的处理

错误提示

Guest agent is not responding: QEMU guest agent is not connected

CODE_FILE
    ../src/qemu/qemu_domain.c
CODE_FUNC
    qemuDomainAgentAvailable
CODE_LINE
    8526
LIBVIRT_CODE
    86
LIBVIRT_DOMAIN
    10
LIBVIRT_SOURCE
    util.error
PRIORITY
    3
SYSLOG_FACILITY
    3
_BOOT_ID
    e8d41ada1ec94052900e15bd6cabd727
_CAP_EFFECTIVE
    1ffffffffff
_CMDLINE
    /usr/sbin/virtqemud --timeout 120
_COMM
    virtqemud
_EXE
    /usr/sbin/virtqemud
_GID
    0
_HOSTNAME
    localhost.localdomain
_MACHINE_ID
    760e98b720374a9087311a1aea584dc6
_PID
    4865
_RUNTIME_SCOPE
    system
_SELINUX_CONTEXT
    kernel
_SOURCE_REALTIME_TIMESTAMP
    1700126716143085
_SYSTEMD_CGROUP
    /system.slice/virtqemud.service
_SYSTEMD_INVOCATION_ID
    d8c1cb44eba54d2788eb6492ef418a46
_SYSTEMD_SLICE
    system.slice
_SYSTEMD_UNIT
    virtqemud.service
_TRANSPORT
    journal
_UID
    0
__CURSOR
    s=3e22457506824768ad4f57aee3165252;i=ed1;b=e8d41ada1ec94052900e15bd6cabd727;m=13f550484;t=60a4198fd2603;x=5ee0a5b5940edc90
__MONOTONIC_TIMESTAMP
    5357503620
__REALTIME_TIMESTAMP
    1700126716143107

虚拟机安装代理客户端

[ops@localhost ~]$ sudo dnf info qemu-guest-agent
Last metadata expiration check: 0:00:15 ago on Thu 16 Nov 2023 05:34:49 PM HKT.
Available Packages
Name         : qemu-guest-agent
Epoch        : 17
Version      : 7.2.0
Release      : 14.el9_2.5
Architecture : x86_64
Size         : 446 k
Source       : qemu-kvm-7.2.0-14.el9_2.5.src.rpm
Repository   : appstream
Summary      : QEMU guest agent
URL          : http://www.qemu.org/
License      : GPLv2 and GPLv2+ and CC-BY
Description  : qemu-kvm is an open source virtualizer that provides hardware emulation for
             : the KVM hypervisor.
             :
             : This package provides an agent to run inside guests, which communicates
             : with the host over a virtio-serial channel named "org.qemu.guest_agent.0"
             :
             : This package does not need to be installed on the host OS.

[ops@localhost ~]$

[ops@localhost ~]$ sudo dnf install qemu-guest-agent
Last metadata expiration check: 0:02:19 ago on Thu 16 Nov 2023 05:34:49 PM HKT.
Dependencies resolved.
================================================================================
 Package              Arch       Version                    Repository     Size
================================================================================
Installing:
 qemu-guest-agent     x86_64     17:7.2.0-14.el9_2.5        appstream     446 k

Transaction Summary
================================================================================
Install  1 Package

Total download size: 446 k
Installed size: 1.8 M
Is this ok [y/N]:

服务注册

[ops@localhost ~]$ sudo systemctl enable qemu-guest-agent
Unit /usr/lib/systemd/system/qemu-guest-agent.service is added as a dependency to a non-existent unit dev-virtio\x2dports-org.qemu.guest_agent.0.device.
[ops@localhost ~]$ sudo systemctl start qemu-guest-agent
[ops@localhost ~]$ sudo systemctl status qemu-guest-agent
● qemu-guest-agent.service - QEMU Guest Agent
     Loaded: loaded (/usr/lib/systemd/system/qemu-guest-agent.service; enabled;>
     Active: active (running) since Thu 2023-11-16 17:41:24 HKT; 10s ago
   Main PID: 14117 (qemu-ga)
      Tasks: 2 (limit: 7887)
     Memory: 2.4M
        CPU: 9ms
     CGroup: /system.slice/qemu-guest-agent.service
             └─14117 /usr/bin/qemu-ga --method=virtio-serial --path=/dev/virtio>

Nov 16 17:41:24 localhost.localdomain systemd[1]: Started QEMU Guest Agent.
[ops@localhost ~]$

在主机上验证可用性

[ops@localhost ~]$ sudo virsh qemu-agent-command 1stvm '{"execute":"guest-info"}'
[sudo] password for ops: 
{"return":{"version":"7.2.0","supported_commands":[{"enabled":true,"name":"guest-get-cpustats","success-response":true},{"enabled":true,"name":"guest-get-diskstats","success-response":true},{"enabled":true,"name":"guest-ssh-remove-authorized-keys","success-response":true},{"enabled":true,"name":"guest-ssh-add-authorized-keys","success-response":true},{"enabled":true,"name":"guest-ssh-get-authorized-keys","success-response":true},{"enabled":false,"name":"guest-get-devices","success-response":true},{"enabled":true,"name":"guest-get-osinfo","success-response":true},{"enabled":true,"name":"guest-get-timezone","success-response":true},{"enabled":true,"name":"guest-get-users","success-response":true},{"enabled":true,"name":"guest-get-host-name","success-response":true},{"enabled":false,"name":"guest-exec","success-response":true},{"enabled":false,"name":"guest-exec-status","success-response":true},{"enabled":true,"name":"guest-get-memory-block-info","success-response":true},{"enabled":true,"name":"guest-set-memory-blocks","success-response":true},{"enabled":true,"name":"guest-get-memory-blocks","success-response":true},{"enabled":true,"name":"guest-set-user-password","success-response":true},{"enabled":true,"name":"guest-get-fsinfo","success-response":true},{"enabled":true,"name":"guest-get-disks","success-response":true},{"enabled":true,"name":"guest-set-vcpus","success-response":true},{"enabled":true,"name":"guest-get-vcpus","success-response":true},{"enabled":true,"name":"guest-network-get-interfaces","success-response":true},{"enabled":true,"name":"guest-suspend-hybrid","success-response":false},{"enabled":true,"name":"guest-suspend-ram","success-response":false},{"enabled":true,"name":"guest-suspend-disk","success-response":false},{"enabled":true,"name":"guest-fstrim","success-response":true},{"enabled":true,"name":"guest-fsfreeze-thaw","success-response":true},{"enabled":true,"name":"guest-fsfreeze-freeze-list","success-response":true},{"enabled":true,"name":"guest-fsfreeze-freeze","success-response":true},{"enabled":true,"name":"guest-fsfreeze-status","success-response":true},{"enabled":false,"name":"guest-file-flush","success-response":true},{"enabled":false,"name":"guest-file-seek","success-response":true},{"enabled":false,"name":"guest-file-write","success-response":true},{"enabled":false,"name":"guest-file-read","success-response":true},{"enabled":false,"name":"guest-file-close","success-response":true},{"enabled":false,"name":"guest-file-open","success-response":true},{"enabled":true,"name":"guest-shutdown","success-response":false},{"enabled":true,"name":"guest-info","success-response":true},{"enabled":true,"name":"guest-set-time","success-response":true},{"enabled":true,"name":"guest-get-time","success-response":true},{"enabled":true,"name":"guest-ping","success-response":true},{"enabled":true,"name":"guest-sync","success-response":true},{"enabled":true,"name":"guest-sync-delimited","success-response":true}]}}

[ops@localhost ~]$