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| -rw-r--r-- | README.restart | 55 | ||||
| -rwxr-xr-x | bin/restart-all | 21 | ||||
| -rw-r--r-- | bin/restart-config | 25 | ||||
| -rwxr-xr-x | bin/restart-login | 3 | ||||
| -rwxr-xr-x | bin/restart-pid | 44 | ||||
| -rwxr-xr-x | bin/restart-world | 28 |
6 files changed, 176 insertions, 0 deletions
diff --git a/README.restart b/README.restart new file mode 100644 index 0000000..0bd147e --- /dev/null +++ b/README.restart @@ -0,0 +1,55 @@ +There are 3 front-facing scripts for this new pidfile-based restart system. + +All of them belong in ~/bin/, although one of them is not actually a script. +(it is source'd, which follows $PATH) + +restart-all Call this on first boot + if REBUILD is not empty, it will first pull, build, and install + from the tmw-eathena repository. + In bash you can do this like: REBUILD=sure restart-all +restart-world Call this if you only want to restart one server. + The first argument is the directory, e.g. ~/tmwa-server-data/ + After that, you may pass --manual or --auto to not-pull or pull + script updates. If neither is specified, the value of PULL is + used. + This does NOT use AUTO_WORLDS or MANUAL_WORLDS. +restart-config Contains configuration settings. + SERVER_SOURCE is the location of the tmw-eathena clone. + LOGIN_WORLD is the location of the clone that contains the + account data. It does not necessarily have to correspond to + a world that actually starts, although it does in the + current configuration + AUTO_WORLDS is an array (space separated, surrounded by + parentheses) of world directories that will have updates + pulled when calling restart-all. + MANUAL_WORLDS is an array of world directories that will not + have updates pulled when calling restart-all + VERBOSE controls whether the servers will print their output + to the tty or have it redirected to /dev/null. Use if if + you have any problems. It is inspected by the low-level + command restart-pid. + REBUILD controls whether the server sources will be rebuilt + during restart-all. + PULL controls whether updates should be pulled by + restart-world. It is ignored if --auto or --manual + is specified, which is the case during restart-all. + All of these variables (except probably the arrays) can be + specified in the environment, but the values in restart-config + override them. However, since restart-config is a bash script, + you could conditionally set the variables by using if test ... + +There are also two commands you'll probably never have to call yourself: +restart-login is self-explanatory and is usually called only by restart-all +restart-pid is the low-level command that maintains the PID file and kills + the old servers. In order for the server to be killed, three + things must match: the PID, and name, and the user. + This will keep errors to a minimum in case PID files continue + to exist after the processes have died and new processes have + taken their IDs. + + There's a theoretical case in which the replacing process will + be a new instance of the same process by the same user in a + different world directory. The odds of this happening are + theoretically 1 in 32767-ish, but in practice might be a bit + more common than that. If you find your newly-spawned children + did not survive, try running restart-all again. diff --git a/bin/restart-all b/bin/restart-all new file mode 100755 index 0000000..5d7e242 --- /dev/null +++ b/bin/restart-all @@ -0,0 +1,21 @@ +#!/bin/bash -e +source restart-config +if test -n "$REBUILD" +then + cd $SERVER_SOURCE + git pull + make + make install prefix=${HOME} +fi + +restart-login $LOGIN_WORLD + +for world in ${AUTO_WORLDS[@]} +do + restart-world $world --auto +done + +for world in ${MANUAL_WORLDS[@]} +do + restart-world $world --manual +done diff --git a/bin/restart-config b/bin/restart-config new file mode 100644 index 0000000..e19ab31 --- /dev/null +++ b/bin/restart-config @@ -0,0 +1,25 @@ +## TMW restart script settings +## This file must be in ~/bin/ even though it's not executable + +## Mandatory filepath settings +SERVER_SOURCE=~/eathena +LOGIN_WORLD=~/tmwa-server-data +AUTO_WORLDS=( + ~/tmwa-server-data +) +MANUAL_WORLDS=( + ~/tmwa-server-test +) +## Boolean settings (nonempty for true) +## if not specified here, the value from the environment is used, +## which is probably empty (false). However, some scripts may +## provide command-line options to override the defaults. + +## Should the servers print their output to the terminal? +# VERBOSE=yep + +## Should server sources be rebuilt? +# REBUILD=sure + +## Should server data be pulled? +# PULL=certainly diff --git a/bin/restart-login b/bin/restart-login new file mode 100755 index 0000000..765fe24 --- /dev/null +++ b/bin/restart-login @@ -0,0 +1,3 @@ +#!/bin/bash -e +cd "$1" +restart-pid login-server diff --git a/bin/restart-pid b/bin/restart-pid new file mode 100755 index 0000000..498bdcc --- /dev/null +++ b/bin/restart-pid @@ -0,0 +1,44 @@ +#!/bin/bash -e +# do nasty work here +# The job of this script is twofold: +# 1. kill the existing server, if it exists +# 2. write the PID file and start the new server + +source restart-config + +PROCESS=$1 + +if test -f $PROCESS.pid +then + # if the process ID may change its name (e.g. via exec), + # then remove '$PROCESS' on the following line + PID=$(pgrep $PROCESS -u $UID -F $PROCESS.pid || true) + if test -n "$PID" + then + kill $PID + echo waiting for $PID to die so I can restart $PROCESS + while + ! kill -s 0 $PID + do + echo -n . + sleep 1 + done + # This shouldn't be necessary, but somehow is + sleep 2 + echo + else + echo $PROCESS.pid does not point to a valid process - nothing killed + fi +else + echo No PID file $PROCESS.pid found - nothing killed +fi + +if test -z "$VERBOSE" +then + exec >/dev/null 2>&1 +fi + +{ + # $$ is not reset in subshells + exec sh -c 'echo $$ > '$PROCESS'.pid; exec ./'$PROCESS +} & diff --git a/bin/restart-world b/bin/restart-world new file mode 100755 index 0000000..7fead17 --- /dev/null +++ b/bin/restart-world @@ -0,0 +1,28 @@ +#!/bin/bash -e +cd "$1" +shift + +source restart-config + +for ARG +do + if [ "$ARG" = --auto ] + then + PULL=y + elif [ "$ARG" = --manual ] + then + PULL= + else + echo unknown argument + exit 1 + fi +done + +if test -n "$PULL" +then + git pull + (cd world/map/conf; cat magic.conf.template | ./spells-build > magic.conf) +fi + +restart-pid char-server +restart-pid map-server |