docker-minecraft-server/files/autopause/autopause-daemon.sh
2021-01-06 22:14:46 -06:00

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#!/bin/bash
. /autopause/autopause-fcns.sh
. ${SCRIPTS:-/}start-utils
autopause_error_loop() {
logAutopause "Available interfaces within the docker container:"
INTERFACES=$(echo /sys/class/net/*)
INTERFACES=${INTERFACES//\/sys\/class\/net\//}
logAutopause " $INTERFACES"
logAutopause "Please set the environment variable AUTOPAUSE_KNOCK_INTERFACE to the interface that handles incoming connections."
logAutopause "If unsure which interface to choose, run the ifconfig command in the container."
logAutopause "Autopause failed to initialize. This log entry will be printed every 30 minutes."
while :
do
if [[ -n $(ps -ax -o comm | grep java) ]] ; then
break
fi
sleep 0.1
done
logAutopause "Failed to start knockd daemon."
logAutopause "Possible cause: docker's host network mode."
logAutopause "Recreate without host mode or disable autopause functionality."
logAutopause "Stopping server."
pkill -SIGTERM java
exit 1
fi
STATE=INIT
while :
do
case X$STATE in
XINIT)
# Server startup
if mc_server_listening ; then
TIME_THRESH=$(($(current_uptime)+$AUTOPAUSE_TIMEOUT_INIT))
logAutopause "MC Server listening for connections - stopping in $AUTOPAUSE_TIMEOUT_INIT seconds"
STATE=K
fi
;;
XK)
# Knocked
if java_clients_connected ; then
logAutopause "Client connected - waiting for disconnect"
STATE=E
else
if [[ $(current_uptime) -ge $TIME_THRESH ]] ; then
logAutopause "No client connected since startup / knocked - stopping"
/autopause/pause.sh
STATE=S
fi
fi
;;
XE)
# Established
if ! java_clients_connected ; then
TIME_THRESH=$(($(current_uptime)+$AUTOPAUSE_TIMEOUT_EST))
logAutopause "All clients disconnected - stopping in $AUTOPAUSE_TIMEOUT_EST seconds"
STATE=I
fi
;;
XI)
# Idle
if java_clients_connected ; then
logAutopause "Client reconnected - waiting for disconnect"
STATE=E
else
if [[ $(current_uptime) -ge $TIME_THRESH ]] ; then
logAutopause "No client reconnected - stopping"
/autopause/pause.sh
STATE=S
fi
fi
;;
XS)
# Stopped
if rcon_client_exists ; then
/autopause/resume.sh
fi
if java_running ; then
if java_clients_connected ; then
logAutopause "Client connected - waiting for disconnect"
STATE=E
else
TIME_THRESH=$(($(current_uptime)+$AUTOPAUSE_TIMEOUT_KN))
logAutopause "Server was knocked - waiting for clients or timeout"
STATE=K
fi
fi
;;
*)
logAutopause "Error: invalid state: $STATE"
;;
esac
if [[ "$STATE" == "S" ]] ; then
# before rcon times out
sleep 2
else
sleep $AUTOPAUSE_PERIOD
fi
done