kuroの覚え書き

96の個人的覚え書き

KVM環境をホストの電源オンオフと連動

ホストの電源を入れたら自動で起動させるには

$ sudo virsh list --all
 Id    Name                           State
----------------------------------------------------
 1     centos7                        running
 -     centos8                        shut off

$ sudo virsh autostart centos7

ホストをシャットダウンするとき自動的にゲストもシャットダウンする。
Ubuntuの場合

$ sudo nano /etc/default/libvirt-guests 
# URIs to check for running guests
# example: URIS='default xen:/// vbox+tcp://host/system lxc:///'
#URIS=default

# action taken on host boot
# - start   all guests which were running on shutdown are started on boot
#           regardless on their autostart settings
# - ignore  libvirt-guests init script won't start any guest on boot, however,
#           guests marked as autostart will still be automatically started by
#           libvirtd
ON_BOOT=ignore

# Number of seconds to wait between each guest start. Set to 0 to allow
# parallel startup.
#START_DELAY=0

# action taken on host shutdown
# - suspend   all running guests are suspended using virsh managedsave
# - shutdown  all running guests are asked to shutdown. Please be careful with
#             this settings since there is no way to distinguish between a
#             guest which is stuck or ignores shutdown requests and a guest
#             which just needs a long time to shutdown. When setting
#             ON_SHUTDOWN=shutdown, you must also set SHUTDOWN_TIMEOUT to a
#             value suitable for your guests.
ON_SHUTDOWN=shutdown

# Number of guests will be shutdown concurrently, taking effect when
# "ON_SHUTDOWN" is set to "shutdown". If Set to 0, guests will be shutdown one
# after another. Number of guests on shutdown at any time will not exceed number
# set in this variable.
PARALLEL_SHUTDOWN=10

# Number of seconds we're willing to wait for a guest to shut down. If parallel
# shutdown is enabled, this timeout applies as a timeout for shutting down all
# guests on a single URI defined in the variable URIS. If this is 0, then there
# is no time out (use with caution, as guests might not respond to a shutdown
# request). The default value is 300 seconds (5 minutes).
SHUTDOWN_TIMEOUT=120

# If non-zero, try to bypass the file system cache when saving and
# restoring guests, even though this may give slower operation for
# some file systems.
#BYPASS_CACHE=0

# If non-zero, try to sync guest time on domain resume. Be aware, that
# this requires guest agent with support for time synchronization
# running in the guest. For instance, qemu-ga doesn't support guest time
# synchronization on Windows guests, but Linux ones. By default, this
# functionality is turned off.
#SYNC_TIME=1

CentOS7の場合

$ sudo nano /etc/sysconfig/libvirt-guests