vinayakakv/docker-openmpi-cluster

A scalable OpenMPI runtime container for Docker

Dockerfile

Openmpi containers

What

Openmpi containers for running distributed computing programs (for lab) in local pc

For who?

(Mostly) NITK students who want to work on distributing computed lab without access to the actual cluster.

Requirements:

Linux PC
Docker
User in the docker group

How

Build the image
```
docker build . -t openmpi
```

Start the cluster

docker-compose up --scale head=1 --scale node=<n>

View the running containers
```
docker container ls
```

Login to head

docker container exec -it bash <name of head node>

Current directory will be accesible in /mnt
```
ls /mnt
```
Compile the example program
```
mpicc test.c -o test
```
Execute it in current node
```
mpirun test
```
Prepare a hosts list. From the output of docker container ls
```
echo <host name> >> host_list.txt
```
Run your program on all hosts
```
mpirun --hostfile host_list.txt test
```
Cleanup
```
    docker-compose down
```

Credits

This repository is forked from https://github.com/oweidner/docker.openmpi