148 lines
3.9 KiB
Bash
148 lines
3.9 KiB
Bash
#!/bin/bash
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. /auto/autopause-fcns.sh
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# shellcheck source=../../scripts/start-utils
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. "${SCRIPTS:-/}start-utils"
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if isTrue "${DEBUG_AUTOPAUSE}"; then
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set -x
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fi
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autopause_error_loop() {
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logAutopause "Available interfaces within the docker container:"
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logAutopause " $(mc-image-helper network-interfaces)"
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logAutopause "Please set the environment variable AUTOPAUSE_KNOCK_INTERFACE to the interface that handles incoming connections."
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logAutopause "If unsure which interface to choose, run the ifconfig command in the container."
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logAutopause "Autopause failed to initialize. This log entry will be printed every 30 minutes."
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while :
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do
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sleep 1800
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logAutopause "Autopause failed to initialize."
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done
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}
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# wait for java process to be started
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while :
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do
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if java_process_exists ; then
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break
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fi
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sleep 0.1
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done
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# check for interface existence
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if [[ -z "$AUTOPAUSE_KNOCK_INTERFACE" ]] ; then
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logAutopause "AUTOPAUSE_KNOCK_INTERFACE variable must not be empty!"
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autopause_error_loop
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fi
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if ! mc-image-helper network-interfaces --check="$AUTOPAUSE_KNOCK_INTERFACE" ; then
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logAutopause "Selected interface \"$AUTOPAUSE_KNOCK_INTERFACE\" does not exist!"
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autopause_error_loop
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fi
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knockdArgs=(-c /tmp/knockd-config.cfg -d -i "$AUTOPAUSE_KNOCK_INTERFACE")
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if isTrue "${DEBUG_AUTOPAUSE}"; then
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knockdArgs+=(-D)
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fi
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if isTrue "${SKIP_SUDO}"; then
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/usr/local/sbin/knockd "${knockdArgs[@]}"
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else
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sudo /usr/local/sbin/knockd "${knockdArgs[@]}"
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fi
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if [ $? -ne 0 ] ; then
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logAutopause "Failed to start knockd daemon."
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logAutopause "Probable cause: Unable to attach to interface \"$AUTOPAUSE_KNOCK_INTERFACE\"."
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autopause_error_loop
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fi
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STATE=INIT
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while :
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do
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isTrue "${DEBUG_AUTOPAUSE}" && log "DEBUG: autopause state = $STATE"
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case X$STATE in
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XINIT)
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# Server startup
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if mc_server_listening ; then
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TIME_THRESH=$(($(current_uptime)+$AUTOPAUSE_TIMEOUT_INIT))
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if [ -e /data/.skip-pause ] ; then
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logAutopause "'/data/.skip-pause' file is present - skipping pausing"
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else
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logAutopause "MC Server listening for connections - pausing in $AUTOPAUSE_TIMEOUT_INIT seconds"
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fi
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STATE=K
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fi
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;;
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XK)
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# Knocked
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if java_clients_connected ; then
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logAutopause "Client connected - waiting for disconnect"
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STATE=E
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elif [ -e /data/.skip-pause ] ; then
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logAutopause "'/data/.skip-pause' file is present - skipping pausing"
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STATE=E
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else
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if [[ $(current_uptime) -ge $TIME_THRESH ]] ; then
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logAutopause "No client connected since startup / knocked - pausing"
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/auto/pause.sh
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STATE=S
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fi
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fi
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;;
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XE)
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# Established
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if ! java_clients_connected ; then
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TIME_THRESH=$(($(current_uptime)+$AUTOPAUSE_TIMEOUT_EST))
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logAutopause "All clients disconnected - pausing in $AUTOPAUSE_TIMEOUT_EST seconds"
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STATE=I
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fi
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;;
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XI)
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# Idle
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if java_clients_connected ; then
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logAutopause "Client reconnected - waiting for disconnect"
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STATE=E
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elif [ -e /data/.skip-pause ] ; then
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TIME_THRESH=$(($(current_uptime)+$AUTOPAUSE_TIMEOUT_EST))
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logAutopause "'/data/.skip-pause' file is present - skipping pausing"
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STATE=E
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else
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if [[ $(current_uptime) -ge $TIME_THRESH ]] ; then
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logAutopause "No client reconnected - pausing"
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/auto/pause.sh
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STATE=S
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fi
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fi
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;;
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XS)
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# Stopped
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if rcon_client_exists ; then
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/auto/resume.sh
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fi
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if java_running ; then
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if java_clients_connected ; then
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logAutopause "Client connected - waiting for disconnect"
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STATE=E
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else
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TIME_THRESH=$(($(current_uptime)+$AUTOPAUSE_TIMEOUT_KN))
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logAutopause "Server was knocked - waiting for clients or timeout"
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STATE=K
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fi
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fi
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;;
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*)
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logAutopause "Error: invalid state: $STATE"
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;;
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esac
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if [[ "$STATE" == "S" ]] ; then
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# before rcon times out
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sleep 5
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else
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sleep "$AUTOPAUSE_PERIOD"
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fi
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done
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