Installing Mesos on Docker for Windows

Mesos on Docker

# Installing Mesos on Docker for Windows

Trying to make Mesos run on a Docker instance on Windows (boot2docker) I've found quite a few issues that I think it can be useful to know about

## Issue #1: Default docker container max size is not enough

Growing a container beyond the 10GB limit is not pretty well documented (at least as this writing) So I've had to make a few steps:
> <b>BE VERY CAREFUL: This process will delete all your existing images/containers. I haven't tryed yet modifying this with existing containers </b>

Starting from the Windows Console you can run:  
```
c:\> boot2docker start  
c:\> boot2docker ssh  
$ sudo su  
```
Edit `/usr/lib/boot2docker/profile` and add:  
```
  #!/bin/sh  
  export EXTRA_ARGS="--storage-opt dm.basesize=20G"  
```
Then you should run:  
```
$ /etc/init.d/docker stop  
$ rm -rf /var/lib/docker  
$ /etc/init.d/docker start  
```

Then look in `/var/log/docker.log` to see if the new parameters have been applied. You'd find something like this:
```
$ /usr/local/bin/docker -d -D -g "/var/lib/docker" -H unix:// -H tcp://0.0.0.0:2376 <b> --storage-opt dm.basesize=20G </b> --tlsverify --tlscacert=/var/lib/boot2docker/tls/ca.pem --tlscert=/var/lib/boot2docker/tls/server.pem --tlskey=/var/lib/boot2docker/tls/serverkey.pem >> "/var/lib/boot2docker/docker.log"
```

### Issue 1.1: DeviceMapper is not the default storage driver for boot2docker
If this is the case the previous modification won't work so you'll have fix this also.

Check if the storage driver for docker is `devicemapper` by running:
```
$ docker info | grep "Storage Driver"
```
If this is not `devicemapper` you will have to change it by modifying the previous `EXTRA_ARGS` to the following 
```
export EXTRA_ARGS= "--storage-opt dm.basesize=20G --storage-driver=devicemapper"
```

For this changes to take effect you'll have to delete `/var/lib/docker` again and restart the docker daemon.

*Note:* You may have issue deleting the `/var/lib/docker` if aufs has been already initiated. You'll receive the following errors if this is the case:
```
rm: can't remove '/var/lib/docker/aufs': Device or resource busy`
rm: can't remove '/var/lib/docker': Directory not empty`
```
To fix this you can use:
```
$ umount -l $(grep 'aufs' /proc/mounts | awk '{print $2}' | sort -r)
$ rm -rf /var/lib/docker 
```

building-the-Image

touch /var/lib/boot2docker
echo #!/bin/sh >> /var/lib/boot2docker
echo export EXTRA_ARGS="--storage-opt dm.basesize=20G --storage-driver=devicemapper" >> /var/lib/boot2docker


umount -l $(grep 'aufs' /proc/mounts | awk '{print $2}' | sort -r)
rm -rf /var/lib/docker/

Dockerfile

FROM ubuntu
MAINTAINER @pcolazurdo

RUN apt-get update && apt-get -y install wget build-essential openjdk-6-jdk python-dev python-boto libcurl4-nss-dev libsasl2-dev maven libapr1-dev libsvn-dev
RUN cd tmp && wget http://www.apache.org/dist/mesos/0.20.1/mesos-0.20.1.tar.gz && tar -zxf mesos-0.20.1.tar.gz
cd mesos-0.20.1 && mkdir build && cd build && ../configure && make install