Alpine Sinatra is sample project for running a Sinatra application in Docker on top minimal Alpine Linux image.
docker build --no-cache --force-rm --rm -t alpine-sinatra app/
Run in Docker
# Run container
$export SINARTA=$(docker run -d -p 5678:5678 alpine-sinatra)
# Check it's running
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
82d80f433583 alpine-sinatra "foreman start -d /ap" 4 seconds ago Up 3 seconds 0.0.0.0:5678->5678/tcp hungry_lumiere
… or run locally
gem install rerun
rerun bundle exec foreman start
You can access it from your browser, http://localhost:5678/.
Endpoints:
/env[?json=yes]look Ma! Environment./diskquick and dirty output ofdf -h/memoryoutput offree -m/exitsend TERM signal to app i.e. exit correctly/failsend KILL to app i.e. exit incorrectly/sleep[?seconds=3.5]wait like a pro.../formsimple form with POST method
Check out logs.
docker logs $SINATRA
Stop it.
docker stop $SINATRA
Delete it.
docker rm $SINATRA
Clean up after it
docker images | grep '<none>' | awk '{print $3}' | xargs docker rmi -f
Use Vagrant. In Vagrantfile, port forwarding setting included!
vagrant up
and
vagrant ssh
You can run this in Lattice
ltc create --run-as-root \
--env RACK_ENV=production \
--env FOO=fubar \
--memory-mb 32 \
--monitor-command 'ps auxww | grep "rackup.*puma" | grep -v grep' \
--monitor-timeout "1s" \
--instances 2 \
alpine-sinatra sashaegorov/alpine-sinatra && \
ltc list
Here http://localhost:5678/form is default development URL if application was started with rackup app/sinatra/config.ru.
curl --form 'message=Hello world!✔︎' --form 'log=yes' http://localhost:5678/form
Hello world!✔︎⏎