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|
#!/bin/bash
#
# A Script for use in Pods... Check for status files, and validate before moving on.
#
DIR="/opt/app/aaf/status"
APP=$1
shift
OTHER=$1
shift
function status {
if [ -d "$DIR" ]; then
echo "$@" > $DIR/$APP
fi
}
function check {
if [ -d "$DIR" ]; then
if [ -e "$DIR/$OTHER" ]; then
echo "$(cat $DIR/$OTHER)"
else
echo "$DIR/$OTHER does not exist"
fi
else
echo "$DIR does not exist"
fi
}
function wait {
n=0
while [ $n -lt 40 ]; do
rv="$(check)"
echo "$rv"
if [ "$rv" = "ready" ]; then
echo "$OTHER is $rv"
n=10000
else
(( ++n ))
echo "Sleep 10 (iteration $n)"
sleep 10
fi
done
}
function start {
n=0
while [ $n -lt 40 ]; do
rv="$(check)"
echo "$OTHER is $rv"
if [ "$rv" = "ready" ]; then
# This is critical. Until status is literally "ready" in the status directory, no processes will start
status ready
echo "Starting $@"
n=10000
else
(( ++n ))
echo "Sleep 10 (iteration $n)"
sleep 10
fi
done
}
case "$OTHER" in
sleep)
echo "Sleeping $1"
status "Sleeping $1"
sleep $1
shift
status "ready"
echo "Done"
;;
wait)
OTHER="$1"
shift
wait
;;
*)
echo "App $APP is waiting to start until $OTHER is ready"
status "waiting for $OTHER"
start
;;
esac
eval "$@"
|
