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Unattended upgrades: Add hypervisor detection and use it for adjusting reboot time #6

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Unattended upgrades: Add hypervisor detection and use it for adjusting reboot time #6

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Unattended upgrades: Add hypervisor detection
amotl Mar 30, 2022
1cb4dad
Unattended upgrades: Use hypervisor detection for adjusting reboot time
amotl Mar 30, 2022
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15 changes: 14 additions & 1 deletion debian-enable-unattended-upgrades.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -12,7 +12,8 @@
# # Enable automatic reboots. Default is `false`.
# export UNATTENDED_REBOOT_ENABLE=true
#
# # Configure reboot time. Default is `04:00`.
# # Configure reboot time.
# # Default is `03:00` for hypervisor machines and `04:00` for guest machines.
# export UNATTENDED_REBOOT_TIME=22:00
#
# # Configure email notifications. Default is `no emails`.
Expand Down Expand Up @@ -53,7 +54,11 @@ COMMUNITY_REPOSITORIES_DISABLED="packages.grafana.com repo.mosquitto.org repos.i
# Set default values for optional configuration settings outlined above.
UNATTENDED_PACKAGE_TIME=${UNATTENDED_PACKAGE_TIME:-7,16:00}
UNATTENDED_REBOOT_ENABLE=${UNATTENDED_REBOOT_ENABLE:-false}
if is_hypervisor; then
UNATTENDED_REBOOT_TIME=${UNATTENDED_REBOOT_TIME:-03:00}
else
UNATTENDED_REBOOT_TIME=${UNATTENDED_REBOOT_TIME:-04:00}
fi


# ---------------
Expand Down Expand Up @@ -258,6 +263,14 @@ function activate_repository {
add_line "${line}"
}

function is_empty() {
# https://superuser.com/a/1284256
test -z $(find "$1" -mindepth 1 -printf X -quit)
}

function is_hypervisor() {
($(is_empty /proc/xen 2> /dev/null) && $(test ! -e /dev/kvm)) && return 1 || return 0
}


# ------------------
Expand Down