Files
weave-scope/docker/entrypoint.sh
2015-08-14 16:58:01 +00:00

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#!/bin/sh
usage() {
echo "$0 --dns <IP> --hostname <NAME> --searchpath <SEARCHPATH> --app.foo bar --probe.foo bar"
exit 1
}
# This script exists to modify the network settings in the scope containers
# as docker doesn't allow it when started with --net=host
mkdir -p /etc/weave
APP_ARGS=""
PROBE_ARGS=""
while true; do
case "$1" in
--dns)
[ $# -gt 1 ] || usage
DNS_SERVER="$2"
shift
;;
--searchpath)
[ $# -gt 1 ] || usage
SEARCHPATH="$2"
shift
;;
--app.*)
if echo "$1" | grep "=" 1>/dev/null; then
ARG_NAME=$(echo "$1" | sed 's/\-\-app\.\([^=]*\)=\(.*\)/\1/')
ARG_VALUE=$(echo "$1" | sed 's/\-\-app\.\([^=]*\)=\(.*\)/\2/')
else
[ $# -gt 1 ] || usage
ARG_NAME=$(echo "$1" | sed 's/\-\-app\.//')
ARG_VALUE="$2"
shift
fi
APP_ARGS="$APP_ARGS -$ARG_NAME=$ARG_VALUE"
;;
--probe.*)
if echo "$1" | grep "=" 1>/dev/null; then
ARG_NAME=$(echo "$1" | sed 's/\-\-probe\.\([^=]*\)=\(.*\)/\1/')
ARG_VALUE=$(echo "$1" | sed 's/\-\-probe\.\([^=]*\)=\(.*\)/\2/')
else
[ $# -gt 1 ] || usage
ARG_NAME=$(echo "$1" | sed 's/\-\-probe\.//')
ARG_VALUE="$2"
shift
fi
PROBE_ARGS="$PROBE_ARGS -$ARG_NAME=$ARG_VALUE"
;;
--service-token*)
if echo "$1" | grep "=" 1>/dev/null; then
ARG_VALUE=$(echo "$1" | sed 's/\-\-service-token=\(.*\)/\1/')
else
[ $# -gt 1 ] || usage
ARG_VALUE="$2"
shift
fi
PROBE_ARGS="$PROBE_ARGS -token=$ARG_VALUE"
echo "scope.weave.works:80" >/etc/weave/apps
touch /etc/service/app/down
;;
--no-app)
touch /etc/service/app/down
;;
--no-probe)
touch /etc/service/probe/down
;;
*)
break
;;
esac
shift
done
echo "$APP_ARGS" >/etc/weave/scope-app.args
echo "$PROBE_ARGS" >/etc/weave/scope-probe.args
if [ -n "$DNS_SERVER" -a -n "$SEARCHPATH" ]; then
echo "domain $SEARCHPATH" >/etc/resolv.conf
echo "search $SEARCHPATH" >>/etc/resolv.conf
echo "nameserver $DNS_SERVER" >>/etc/resolv.conf
fi
# End of the command line can optionally be some
# addresses of apps to connect to, for people not
# using Weave DNS. We stick these in /etc/weave/apps
# for the run-probe script to pick up.
MANUAL_APPS=$@
echo "$MANUAL_APPS" >>/etc/weave/apps
exec /sbin/runsvdir /etc/service