Shell script for Container Solutions Software Circus Meetup

dcosDemo.sh

#!/bin/bash
################
# Introduction #
# This script is a demo of DCOS for the Container Solutions hosted Software Circus meetup.
# Don't run this as a script, it expects the DCOS CLI installed. Rather you should work 
# through the examples one by one.
# Prerequisites:
# - A working DCOS cluster on AWS. See https://mesosphere.com/amazon/setup/
# Please make sure you enter your master AWS IP below.

export DCOSMASTER=52.18.26.47

# View web UI's
## DCOS
echo "DOCS url: http://${DCOSMASTER}/"
## Marathon
echo "Marathon url: http://${DCOSMASTER}:8080/"
## Mesos
echo "Mesos url: http://${DCOSMASTER}:5050/"

# Install CLI from
# https://docs.mesosphere.com/install/cli/

## CD into dcos folder (where you have installed it)
cd /Volumes/source/dcos 

# Setup
## Source DCOS so we can run the command
source /Volumes/source/dcos/bin/env-setup && dcos help 
## Set DCOS URL
dcos config set core.dcos_url http://${DCOSMASTER}/

# If we were to use the ES project, then we would add that as a source
dcos config prepend package.sources "https://github.com/trifork-leeds/universe/archive/version-1.x.zip"
dcos package sources
# Remove package
dcos config unset package.sources --index=0 

# Update packages
dcos package update

#################
# SPARK EXAMPLE #
## Install spark
## Note, takes a few minutes to download, so don't do this live.
dcos package install spark

## View spark web
dcos spark webui

## Calculate pi!
dcos spark run --submit-args='-Dspark.mesos.coarse=true --driver-cores 1 --driver-memory 256M --class org.apache.spark.examples.SparkPi http://downloads.mesosphere.com.s3.amazonaws.com/assets/spark/spark-examples_2.10-1.4.0-SNAPSHOT.jar 1000'

##################
# WEBAPP EXAMPLE #
## Add JSON marathon command
echo '{
  "container": {
    "type": "DOCKER",
    "docker": {
      "image": "superguenter/demo-app"
    }
  },
  "cmd":  "python -m SimpleHTTPServer $PORT",
  "id": "demo",
  "cpus": 0.01,
  "mem": 256,
  "ports": [3000]
}' > example.json

dcos marathon app add example.json

## List
dcos marathon app list 

## Tunnel into slave to view web gui
/Volumes/source/tunnelIntoWeb.sh ${DCOSMASTER} 10.0.0.176 3000
http://localhost:3000/

## Scale up
dcos marathon app update demo instances=100

## Kill a load of random processes
/Volumes/source/tunnelInto.sh ${DCOSMASTER} 10.0.0.176
sudo kill -9 $(ps -ax | grep "docker wait" | awk -F ' ' '{print $1}')

## Scale down
dcos marathon app update demo instances=1

# Stop
dcos marathon app stop demo