etherpad-lite/bin/safeRun.sh
2020-06-03 23:11:44 -04:00

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#!/bin/sh
# This script ensures that ep-lite is automatically restarting after
# an error happens
# Handling Errors
# 0 silent
# 1 email
ERROR_HANDLING=0
# Your email address which should receive the error messages
EMAIL_ADDRESS="no-reply@example.com"
# Sets the minimum amount of time between the sending of error emails.
# This ensures you do not get spammed during an endless reboot loop
# It's the time in seconds
TIME_BETWEEN_EMAILS=600 # 10 minutes
# DON'T EDIT AFTER THIS LINE
pecho() { printf %s\\n "$*"; }
log() { pecho "$@"; }
error() { log "ERROR: $@" >&2; }
fatal() { error "$@"; exit 1; }
LAST_EMAIL_SEND=0
# Move to the folder where ep-lite is installed
cd "$(dirname "$0")"/..
# Check if a logfile parameter is set
LOG="$1"
[ -n "${LOG}" ] || fatal "Set a logfile as the first parameter"
shift
while true; do
# Try to touch the file if it doesn't exist
[ -f "${LOG}" ] || touch "${LOG}" || fatal "Logfile '${LOG}' is not writeable"
# Check if the file is writeable
[ -w "${LOG}" ] || fatal "Logfile '${LOG}' is not writeable"
# Start the application
bin/run.sh "$@" >>${LOG} 2>>${LOG}
TIME_FMT=$(date +%Y-%m-%dT%H:%M:%S%z)
# Send email
if [ "$ERROR_HANDLING" = 1 ]; then
TIME_NOW=$(date +%s)
TIME_SINCE_LAST_SEND=$(($TIME_NOW - $LAST_EMAIL_SEND))
if [ "$TIME_SINCE_LAST_SEND" -gt "$TIME_BETWEEN_EMAILS" ]; then
{
cat <<EOF
Server was restarted at: ${TIME_FMT}
The last 50 lines of the log before the server exited:
EOF
tail -n 50 "${LOG}"
} | mail -s "Etherpad restarted" "$EMAIL_ADDRESS"
LAST_EMAIL_SEND=$TIME_NOW
fi
fi
pecho "RESTART! ${TIME_FMT}" >>${LOG}
# Sleep 10 seconds before restart
sleep 10
done