Valentin David
0dc39dffbd
Some configuration files that need updates are directly under in /etc. To update them atomically, we need write access to /etc. For Ubuntu Core this is an issue as /etc is not writable. Only a selection of subdirectories can be writable. The general solution is symlinks or bind mounts to writable places. But for atomic writes in /etc, that does not work. So Ubuntu has had a patch for that that did not age well. Instead we would like to introduce some environment variables for alternate paths. * SYSTEMD_ETC_HOSTNAME: /etc/hostname * SYSTEMD_ETC_MACHINE_INFO: /etc/machine-info * SYSTEMD_ETC_LOCALTIME: /etc/localtime * SYSTEMD_ETC_LOCALE_CONF: /etc/locale.conf * SYSTEMD_ETC_VCONSOLE_CONF: /etc/vconsole.conf * SYSTEMD_ETC_ADJTIME: /etc/adjtime While it is for now expected that there is a symlink from the standard, we still try to read them from that alternate path. This is important for `/etc/localtime`, which is a symlink, so we cannot have an indirect symlink or bind mount for it. Since machine-id is typically written only once and not updated. This commit does not cover it. An initrd can properly create it and bind mount it.
67 lines
1.9 KiB
Bash
Executable File
67 lines
1.9 KiB
Bash
Executable File
#!/usr/bin/env bash
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# SPDX-License-Identifier: LGPL-2.1-or-later
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set -eux
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set -o pipefail
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systemd-analyze log-level debug
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systemctl disable --now systemd-timesyncd.service
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timedatectl set-timezone Europe/Berlin
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# A future timestamp needs to be used, otherwise 'timedatectl set-time' fails
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# if a timestamp older than the TIME_EPOCH is specified.
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current_time=$(date)
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future_time=$(date -d "$current_time + 1 year" +"%Y-%m-%d %H:%M:%S")
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timedatectl set-time "$future_time"
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systemd-run --on-timezone-change touch /tmp/timezone-changed
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systemd-run --on-clock-change touch /tmp/clock-changed
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test ! -f /tmp/timezone-changed
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test ! -f /tmp/clock-changed
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timedatectl set-timezone Europe/Kyiv
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while test ! -f /tmp/timezone-changed ; do sleep .5 ; done
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future_time=$(date -d "$current_time + 1 year + 1 month" +"%Y-%m-%d %H:%M:%S")
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timedatectl set-time "$future_time"
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while test ! -f /tmp/clock-changed ; do sleep .5 ; done
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mkdir -p /etc/alternate-path
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rm -f /etc/alternate-path/localtime
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cat <<EOF >/run/systemd/system.conf
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[Manager]
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ManagerEnvironment=SYSTEMD_ETC_LOCALTIME=/etc/alternate-path/localtime
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EOF
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mkdir -p /run/systemd/system/systemd-timedated.service.d
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cat >/run/systemd/system/systemd-timedated.service.d/override.conf <<EOF
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[Service]
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Environment=SYSTEMD_ETC_LOCALTIME=/run/alternate-path/mylocaltime
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Environment=SYSTEMD_ETC_ADJTIME=/run/alternate-path/myadjtime
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EOF
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systemctl daemon-reload
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systemd-run --on-timezone-change touch /tmp/timezone-changed-alternate-path-1
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timedatectl set-timezone Europe/Berlin
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while test ! -f /tmp/timezone-changed-alternate-path-1 ; do sleep .5 ; done
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systemd-run --on-timezone-change touch /tmp/timezone-changed-alternate-path-2
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timedatectl set-timezone Europe/Kyiv
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while test ! -f /tmp/timezone-changed-alternate-path-2 ; do sleep .5 ; done
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rm /run/systemd/system.conf /run/systemd/system/systemd-timedated.service.d/override.conf
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systemctl daemon-reload
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systemd-analyze log-level info
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touch /testok
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