Service Discovery for Marathon. This project is based on the haproxy-marathon-bridge script deployed with Marathon. The goal of this project is to provide a GUI to customize the configuration of haproxy. Spiderweb is designed to run inside a docker container but can also be run as just a normal node application.
Assuming that you already have marathon install all you need to do is add a new application using the configuration file shown below and then install the haproxy script.
All you need to do is replace the MARATHON_HOST and ZOOKEEPER_CONNECT environmental variables to the correct host name and configuration for your installation of marathon and then add the application. If there any any conflicts you may also need to replace the hostPort configured in the portMappings. You can leave the hostPort set to 0 if you choose to do so but then you will need to find the correct port that spiderweb is running on in order to install the script.
{
"id": "/spiderweb",
"env": {
"MARATHON_HOST": "127.0.0.1",
"MARATHON_PORT": "8080",
"ZOOKEEPER_CONNECT": "127.0.0.1:2181",
"BINDING_PORT": "8081"
},
"instances": 1,
"cpus": 0.2,
"mem": 256,
"uris": [],
"container": {
"type": "DOCKER",
"docker": {
"image": "sbrnetmarketing/spiderweb",
"network": "BRIDGE",
"portMappings": [{
"containerPort": 8081,
"hostPort": 32000,
"servicePort": 8081
}]
}
},
"constraints": [["hostname", "UNIQUE"]],
"healthChecks": [{
"protocol": "HTTP",
"portIndex": 0,
"path": "/",
"gracePeriodSeconds": 5,
"intervalSeconds": 20,
"maxConsecutiveFailures": 3
}]
}If you don't want to run it in marathon you can also optionally run it manually in docker by running the command below. Again be sure to change the env variables MARATHON_HOST and ZOOKEEPER_CONNECT.
docker run -d -e MARATHON_HOST=127.0.0.1 -e ZOOKEEPER_CONNECT=127.0.0.1:2181 -p 32000:8081 sbrnetmarketing/spiderweb
Once you add the application then install the cronjob to update haproxy. Assuming that 32000 is the port that was selected for the hostPort in the previous step.
curl -s http://localhost:32000/install-crontab.sh | bash /dev/stdin install_cronjob http://localhost:32000Now you can either restart haproxy or wait 1 minute and it will restart with the new configuration.
service haproxy restartTo test that spiderweb is properly installed please visit the following URL http://localhost:8081.