process.on('SIGTERM', function() {
console.log('shutting down...');
});
'use strict';
var http = require('http');
var server = http.createServer(function (req, res) {
res.writeHead(200, {'Content-Type': 'text/plain'});
res.end('Hello Worldn');
}).listen(3000, '0.0.0.0');
console.log('server started');
var signals = {
'SIGINT': 2,
'SIGTERM': 15
};
function shutdown(signal, value) {
server.close(function () {
console.log('server stopped by ' + signal);
process.exit(128 + value);
});
}
Object.keys(signals).forEach(function (signal) {
process.on(signal, function () {
shutdown(signal, signals[signal]);
});
});
FROM iojs:onbuild COPY ./app.js ./app.js COPY ./package.json ./package.json EXPOSE 3000 ENTRYPOINT ["node", "app"]
$ docker build --no-cache -t signal-app -f Dockerfile .
$ docker run -it --rm -p 3000:3000 --name="my-app" signal-app
$ docker container kill --signal="SIGTERM" my-app
#!/usr/bin/env bash node app
FROM iojs:onbuild COPY ./app.js ./app.js COPY ./app1.sh ./app1.sh COPY ./package.json ./package.json RUN chmod +x ./app1.sh EXPOSE 3000 ENTRYPOINT ["./app1.sh"]
$ docker build --no-cache -t signal-app1 -f Dockerfile1 .
$ docker run -it --rm -p 3000:3000 --name="my-app1" signal-app1
$ docker container stop my-app1 # or $ docker container kill --signal="SIGKILL" my-app1
#!/usr/bin/env bash
set -x
pid=0
# SIGUSR1-handler
my_handler() {
echo "my_handler"
}
# SIGTERM-handler
term_handler() {
if [ $pid -ne 0 ]; then
kill -SIGTERM "$pid"
wait "$pid"
fi
exit 143; # 128 + 15 -- SIGTERM
}
# setup handlers
# on callback, kill the last background process, which is `tail -f /dev/null` and execute the specified handler
trap 'kill ${!}; my_handler' SIGUSR1
trap 'kill ${!}; term_handler' SIGTERM
# run application
node app &
pid="$!"
# wait forever
while true
do
tail -f /dev/null & wait ${!}
done
FROM iojs:onbuild COPY ./app.js ./app.js COPY ./app2.sh ./app2.sh COPY ./package.json ./package.json RUN chmod +x ./app2.sh EXPOSE 3000 ENTRYPOINT ["./app2.sh"]
$ docker build --no-cache -t signal-app2 -f Dockerfile2 .
$ docker run -it --rm -p 3000:3000 --name="my-app2" signal-app2
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