mhausenblas/README.md

## README.md

      
    Raw
  

              README.md
            
          
    Demo


Create a DCOS CE cluster
dcos package install kubernetes takes 1-2 min until UI is available
Install kubectl as per the docs
Set up K8S: export KUBERNETES_MASTER=$FQHN_OF_DASHBOARD/service/kubernetes/api

    $ dcos package list
    $ dcos marathon app add marathon-gen.json
    $ kubectl create -f k8s-webserver-pod.json
    $ kubectl get pods
    $ kubectl create -f k8s-webserver-service.json
    $ kubectl get services
    $ curl $FQHN_OF_DASHBOARD/service/kubernetes/api/v1/proxy/namespaces/default/services/nginx-service/
    $ kubectl delete service nginx-service
    $ kubectl delete pod nginx


## gen.sh
#!/bin/sh

while true
do
  timestamp=$(date +%s)
  echo '<html><h1>Something important happened:' "$timestamp" '</h1>' > "$1"
  sleep 2
done

## k8s-webserver-pod.json
{
    "apiVersion": "v1",
    "kind": "Pod",
    "metadata": {
        "labels": {
            "name": "nginx"
        },
        "name": "nginx",
        "namespace": "default"
    },
    "spec": {
        "containers": [
            {
                "image": "nginx:latest",
                "name": "nginx",
                "ports": [
                    {
                        "containerPort": 80
                    }
                ],
                "resources": {
                    "limits": {
                        "cpu": "500m",
                        "memory": "128Mi"
                    }
                },
                "volumeMounts": [
                    {
                        "mountPath": "/usr/share/nginx/html",
                        "name": "genvol",
                        "readOnly": true
                    }
                ]
            }
        ],
        "volumes": [
            {
                "hostPath": {
                    "path": "/tmp/gen/"
                },
                "name": "genvol"
            }
        ]
    }
}

## k8s-webserver-service.json
{
    "apiVersion": "v1",
    "kind": "Service",
    "metadata": {
        "labels": {
            "name": "nginx"
        },
        "name": "nginx-service",
        "namespace": "default"
    },
    "spec": {
        "ports": [
            {
                "port": 80
            }
        ],
        "selector": {
            "name": "nginx"
        }
    }
}

## marathon-gen.json
{
    "id": "generator",
    "instances": 1,
    "mem": 32.0,
    "cmd": "chmod u+x gen.sh ; [ ! -d /tmp/gen ] && mkdir -p /tmp/gen ; ./gen.sh /tmp/gen/index.html",
    "cpus": 0.5,
    "uris": [
        "https://dl.dropboxusercontent.com/u/10436738/london-mug-09-2015/gen.sh"
    ],
    "constraints": [
        [
            "hostname",
            "LIKE",
            "ip-10-0-0-202.eu-west-1.compute.internal"
        ]
    ]
}
	#!/bin/sh

	while true
	do
	timestamp=$(date +%s)
	echo '<html><h1>Something important happened:' "$timestamp" '</h1>' > "$1"
	sleep 2
	done
	{
	"apiVersion": "v1",
	"kind": "Pod",
	"metadata": {
	"labels": {
	"name": "nginx"
	},
	"name": "nginx",
	"namespace": "default"
	},
	"spec": {
	"containers": [
	{
	"image": "nginx:latest",
	"name": "nginx",
	"ports": [
	{
	"containerPort": 80
	}
	],
	"resources": {
	"limits": {
	"cpu": "500m",
	"memory": "128Mi"
	}
	},
	"volumeMounts": [
	{
	"mountPath": "/usr/share/nginx/html",
	"name": "genvol",
	"readOnly": true
	}
	]
	}
	],
	"volumes": [
	{
	"hostPath": {
	"path": "/tmp/gen/"
	},
	"name": "genvol"
	}
	]
	}
	}
	{
	"apiVersion": "v1",
	"kind": "Service",
	"metadata": {
	"labels": {
	"name": "nginx"
	},
	"name": "nginx-service",
	"namespace": "default"
	},
	"spec": {
	"ports": [
	{
	"port": 80
	}
	],
	"selector": {
	"name": "nginx"
	}
	}
	}
	{
	"id": "generator",
	"instances": 1,
	"mem": 32.0,
	"cmd": "chmod u+x gen.sh ; [ ! -d /tmp/gen ] && mkdir -p /tmp/gen ; ./gen.sh /tmp/gen/index.html",
	"cpus": 0.5,
	"uris": [
	"https://dl.dropboxusercontent.com/u/10436738/london-mug-09-2015/gen.sh"
	],
	"constraints": [
	[
	"hostname",
	"LIKE",
	"ip-10-0-0-202.eu-west-1.compute.internal"
	]
	]
	}