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https://github.com/YunoHost-Apps/mastodon_ynh.git
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89 lines
3.3 KiB
Bash
89 lines
3.3 KiB
Bash
#!/bin/bash
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# Start (or other actions) a service, print a log in case of failure and optionnaly wait until the service is completely started
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#
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# usage: ynh_systemd_action [-n service_name] [-a action] [ [-l "line to match"] [-p log_path] [-t timeout] [-e length] ]
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# | arg: -n, --service_name= - Name of the service to reload. Default : $app
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# | arg: -a, --action= - Action to perform with systemctl. Default: start
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# | arg: -l, --line_match= - Line to match - The line to find in the log to attest the service have finished to boot.
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# If not defined it don't wait until the service is completely started.
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# | arg: -p, --log_path= - Log file - Path to the log file. Default : /var/log/$app/$app.log
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# | arg: -t, --timeout= - Timeout - The maximum time to wait before ending the watching. Default : 300 seconds.
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# | arg: -e, --length= - Length of the error log : Default : 20
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ynh_systemd_action() {
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# Declare an array to define the options of this helper.
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declare -Ar args_array=( [n]=service_name= [a]=action= [l]=line_match= [p]=log_path= [t]=timeout= [e]=length= )
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local service_name
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local action
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local line_match
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local length
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local log_path
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local timeout
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# Manage arguments with getopts
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ynh_handle_getopts_args "$@"
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local service_name="${service_name:-$app}"
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local action=${action:-start}
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local log_path="${log_path:-/var/log/$service_name/$service_name.log}"
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local length=${length:-20}
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local timeout=${timeout:-300}
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# Start to read the log
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if [[ -n "${line_match:-}" ]]
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then
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local templog="$(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 -u $service_name -f --since=-45 > "$templog" &
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else
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# Read the specified log file
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tail -F -n0 "$log_path" > "$templog" &
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fi
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# Get the PID of the tail command
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local pid_tail=$!
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fi
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echo "${action^} the service $service_name" >&2
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systemctl $action $service_name \
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|| ( journalctl --lines=$length -u $service_name >&2 \
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; test -n "$log_path" && echo "--" && tail --lines=$length "$log_path" >&2 \
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; false )
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# Start the timeout and try to find line_match
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if [[ -n "${line_match:-}" ]]
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then
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local i=0
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for i in $(seq 1 $timeout)
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do
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# Read the log until the sentence is found, that means the app finished to start. Or run until the timeout
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if grep --quiet "$line_match" "$templog"
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then
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echo "The service $service_name has correctly started." >&2
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break
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fi
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echo -n "." >&2
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sleep 1
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done
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if [ $i -eq $timeout ]
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then
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echo "The service $service_name didn't fully started before the timeout." >&2
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journalctl --lines=$length -u $service_name >&2
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test -n "$log_path" && echo "--" && tail --lines=$length "$log_path" >&2
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fi
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echo ""
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ynh_clean_check_starting
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fi
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}
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# Clean temporary process and file used by ynh_check_starting
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# (usually used in ynh_clean_setup scripts)
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#
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# usage: ynh_clean_check_starting
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ynh_clean_check_starting () {
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# Stop the execution of tail.
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kill -s 15 $pid_tail 2>&1
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ynh_secure_remove "$templog" 2>&1
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}
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