🍽 Fork YunoHost — snapshot mangé par la machine à tsoins
Upstream: https://github.com/YunoHost/yunohost @ 3a5f8bac8301c450897b96cbd43a4c7d3ba750fb But (José) : transformer tout le code en bions + ploxions du xerboxion. La carte de digestion vit au labo : /yunohost-digest.json
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machine-a-tsoins
224
helpers/helpers.v2.1.d/systemd
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224
helpers/helpers.v2.1.d/systemd
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#!/usr/bin/env bash
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#
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# Copyright (c) 2024 YunoHost Contributors
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#
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# This file is part of YunoHost (see https://yunohost.org)
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# Create a dedicated systemd config
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#
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# usage: ynh_config_add_systemd [--mount=mount] [--service=service] [--template=templatename]
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# | arg: --mount= - Mount name (optional)
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# | arg: --service= - Service name (optional, `$app` by default)
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# | arg: --template= - Name of template file (optional, 'systemd.service' by default, meaning `../conf/systemd.service` will be used as template)
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#
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# This will use the template `../conf/<templatename>`.
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#
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# See the documentation of `ynh_config_add` for a description of the template
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# format and how placeholders are replaced with actual variables.
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ynh_config_add_systemd() {
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# ============ Argument parsing =============
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local -A args_array=([m]=mount= [s]=service= [t]=template=)
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local mount
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local service
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local template
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ynh_handle_getopts_args "$@"
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mount="${mount:-}"
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service="${service:-$app}"
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template="${template:-systemd.service}"
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# ===========================================
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if [[ -n "$mount" ]]; then
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ynh_config_add --template="$template" --destination="/etc/systemd/system/$mount.mount"
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systemctl enable "$mount.mount" --quiet
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else
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ynh_config_add --template="$template" --destination="/etc/systemd/system/$service.service"
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systemctl enable "$service.service" --quiet
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fi
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systemctl daemon-reload
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}
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# Remove the dedicated systemd config
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#
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# usage: ynh_config_remove_systemd service
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# | arg: service - Service name (optional, $app by default)
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ynh_config_remove_systemd() {
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local service="${1:-$app}"
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if [ -e "/etc/systemd/system/$service.service" ]; then
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ynh_systemctl --service="$service" --action=stop
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systemctl disable "$service.service" --quiet
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ynh_safe_rm "/etc/systemd/system/$service.service"
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systemctl daemon-reload
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fi
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if [ -e "/etc/systemd/system/$service.mount" ]; then
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ynh_systemctl --service="$service" --action=stop
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systemctl disable "$service.mount" --quiet
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ynh_safe_rm "/etc/systemd/system/$service.mount"
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systemctl daemon-reload
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fi
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}
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# Start (or other actions) a service, print a log in case of failure and optionaly wait until the service is completely started
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#
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# usage: ynh_systemctl [--service=service] [--action=action] [ [--wait_until="line to match"] [--log_path=log_path] [--timeout=300] [--length=20] ]
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# | arg: --service= - Name of the service to start. Default : `$app`
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# | arg: --mount= - Name of the mount. If set, service="$mount.mount"
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# | arg: --action= - Action to perform with systemctl. Default: start
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# | arg: --wait_until= - The pattern to find in the log to attest the service is effectively fully started.
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# | arg: --log_path= - Log file - Path to the log file. Default : `/var/log/$app/$app.log`; `systemd` to listen on `journalctl --unit=$service`
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# | arg: --timeout= - Timeout - The maximum time to wait before ending the watching. Default : 60 seconds.
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# | arg: --length= - Length of the error log displayed for debugging : Default : 20
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ynh_systemctl() {
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# ============ Argument parsing =============
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local -A args_array=([n]=service= [m]=mount= [a]=action= [w]=wait_until= [p]=log_path= [t]=timeout= [e]=length=)
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local service
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local mount
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local action
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local wait_until
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local length
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local log_path
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local timeout
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ynh_handle_getopts_args "$@"
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service="${service:-$app}"
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mount="${mount:-}"
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action=${action:-start}
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wait_until=${wait_until:-}
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length=${length:-20}
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log_path="${log_path:-/var/log/$service/$service.log}"
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# ===========================================
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if [ -n "$mount" ]; then
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service="$mount.mount"
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fi
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if ynh_in_ci_tests && [ "$length" -le 20 ]; then
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# Use a shorter timeout than in production to save CI time (services should rarely take up more than 2 minutes to start with the CI hardware)
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timeout=${timeout:-120}
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# On CI, use length=100 because it's sometime hell to debug otherwise for super-long output
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length=100
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else
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# 300 is a conservative value, especially because it may take quite
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# long for service to start on low-end hardware, and CI should already
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# have validate that the service is expected to be working
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timeout=${timeout:-300}
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fi
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# Manage case of service already stopped
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if [ "$action" == "stop" ] && ! systemctl is-active --quiet "$service"; then
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return 0
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fi
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# Start to read the log
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if [[ -n "$wait_until" ]]; then
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local templog="$(mktemp)"
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# Following the starting of the app in its log
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if [ "$log_path" == "systemd" ]; then
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# Read the systemd journal
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journalctl --unit="$service" --follow --since=-0 --quiet > "$templog" &
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# Get the PID of the journalctl command
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local pid_tail=$!
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else
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# Read the specified log file
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tail --follow=name --retry --lines=0 "$log_path" > "$templog" 2>&1 &
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# Get the PID of the tail command
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local pid_tail=$!
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fi
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fi
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# Use reload-or-restart instead of reload. So it wouldn't fail if the service isn't running.
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if [ "$action" == "reload" ]; then
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action="reload-or-restart"
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fi
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local time_start="$(date --utc --rfc-3339=seconds | cut -d+ -f1) UTC"
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# If the service fails to perform the action
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if ! systemctl "$action" "$service"; then
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# Show syslog for this service
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journalctl --quiet --no-hostname --no-pager --lines="$length" --unit="$service" >&2
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# If a log is specified for this service, show also the content of this log
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if [ -e "$log_path" ]; then
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tail --lines="$length" "$log_path" >&2
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fi
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_ynh_clean_check_starting
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return 1
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fi
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# Start the timeout and try to find wait_until
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if [[ -n "${wait_until:-}" ]]; then
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set +o xtrace # set +x
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local i=0
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local starttime=$(date +%s)
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for i in $(seq 1 "$timeout"); do
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# Read the log until the sentence is found, that means the app finished to start. Or run until the timeout
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if [ "$log_path" == "systemd" ]; then
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# For systemd services, we in fact dont rely on the templog, which for some reason is not reliable, but instead re-read journalctl every iteration, starting at the timestamp where we triggered the action
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if journalctl --unit="$service" --since="$time_start" --quiet --no-pager --no-hostname | grep --extended-regexp --quiet "$wait_until"; then
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ynh_print_info "The service $service has correctly executed the action ${action}."
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break
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fi
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else
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if grep --extended-regexp --quiet "$wait_until" "$templog"; then
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ynh_print_info "The service $service has correctly executed the action ${action}."
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break
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fi
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fi
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if [ "$i" -eq 30 ]; then
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echo "(this may take some time)" >&2
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fi
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# Also check the timeout using actual timestamp, because sometimes for some reason,
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# journalctl may take a huge time to run, and we end up waiting literally an entire hour
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# instead of 5 min ...
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if [[ "$(($(date +%s) - starttime))" -gt "$timeout" ]]; then
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i=$timeout
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break
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fi
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sleep 1
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done
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set -o xtrace # set -x
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if [ "$i" -ge 3 ]; then
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echo "" >&2
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fi
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if [ "$i" -eq "$timeout" ]; then
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ynh_print_warn "The service $service didn't fully execute the action ${action} before the timeout."
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ynh_print_warn "Please find here an extract of the end of the log of the service $service:"
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journalctl --quiet --no-hostname --no-pager --lines="$length" --unit="$service" >&2
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if [ -e "$log_path" ]; then
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ynh_print_warn "==="
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tail --lines="$length" "$log_path" >&2
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fi
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# If we tried to reload/start/restart but reached timeout, then handle it as a failure
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if [ "$action" == "reload" ] || [ "$action" == "start" ] || [ "$action" == "restart" ]; then
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# NB: we don't check the actual 'active' status of the service,
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# because if the service is on Restart=always, it may be in a starting loop where it's temporarily active...
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_ynh_clean_check_starting
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return 1
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fi
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fi
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_ynh_clean_check_starting
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fi
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}
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_ynh_clean_check_starting() {
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if [ -n "${pid_tail:-}" ]; then
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# Stop the execution of tail.
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kill -SIGTERM "$pid_tail" 2>&1
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fi
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if [ -n "${templog:-}" ]; then
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ynh_safe_rm "$templog" 2>&1
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fi
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}
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