Mesos-marathon demo

Preparing the environnement

Just follow the instructions inside the vagrant-mesos directory. Once your vagrant machine is running with mesos and marathon installed you can continue with the following sections.

Building the image

To be able to execute the example using docker, the directory docker-image contains the steps needed to build and create docker instances. For this example, i have pushed my image in dockerhub ant then with

docker push dicaormu/app

Then, from the vagrant machine, i have pulled the image before run with marathon using

sudo docker pull dicaormu/piopiojar

Running the image

In order to deploy a new application in marathon it is just enough to make a Http POST

curl -XPOST -H "Content-Type:application/json" "http://192.168.33.10:8080/v2/apps" -d @/Users/johndoe/Documents/mesos-marathon/app.json

The contents of the json file obviously depends on the kind of applcation we want to deploy. The following sections contains several examples.

Installing a tomcat server and deploy a war inside

curl -i -H "Content-type: application/json" -X POST http://192.168.33.10:8080/v2/apps -d '
{
  "id": "tomcat",
  "cmd": "mv *.war apache-tomcat-*/webapps && cd apache-tomcat-* && sed \"s/8080/$PORT/g\" < ./conf/server.xml > ./conf/server-mesos.xml && ./bin/catalina.sh run -config ./conf/server-mesos.xml",
  "mem": 512,
  "cpus": 1.0,
  "instances": 1,
  "uris": [
    "http://wwwftp.ciril.fr/pub/apache/tomcat/tomcat-8/v8.0.20/bin/apache-tomcat-8.0.20.tar.gz",
    "https://gwt-examples.googlecode.com/files/Calendar.war"
  ]
}
'

Installing a docker image and start it

curl -i -H "Content-type: application/json" -X POST http://192.168.33.10:8080/v2/apps -d '
{
 "id": "exampleapp",
 "instances": 1,
 "cpus": 0.25,
 "mem": 128,
 "uris":[],
 "env": {  },
 "ports":[9000],
 "container": {
   "type": "DOCKER",
   "volumes": [],
   "docker": {
     "image": "dicaormu/piopiojar:latest",
     "network": "BRIDGE",
     "portMappings": [{ "containerPort": 8080, "servicePort": 9000 , "hostPort": 0, "protocol": "tcp" }]
    }
  }
}
'

It is also possible to create additional health checks to the installed applications by adding the following section to the json

"healthChecks": [
    {
      "protocol": "HTTP",
      "portIndex": 0,
      "path": "/",
      "gracePeriodSeconds": 5,
      "intervalSeconds": 20,
      "maxConsecutiveFailures": 3
    },
    {
      "protocol": "COMMAND",
      "command": { "value": "curl -f -X GET http://$HOST:$PORT" },
      "gracePeriodSeconds": 5,
      "intervalSeconds": 20,
      "maxConsecutiveFailures": 3
    }
]

dicaormu / mesos-marathon-demo Goto Github PK