AmazonLinux(CentOS)にMPIを入れる

yumでインストール

sudo yum install openmpi openmpi-devel
sudo yum install mpich2 mpich2-devel # これは不要かも？

パス追加

~/.bashrcに追加

export PATH=$PATH:/usr/lib64/openmpi/bin
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/lib64/openmpi/lib
export C_INCLUDE_PATH=$C_INCLUDE_PATH:/usr/include/openmpi-x86_64
export CPLUS_INCLUDE_PATH=$C_INCLUDE_PATH

python

ライブラリを追加

sudo yum install gcc gcc-c++ make git openssl-devel bzip2-devel zlib-devel readline-devel sqlite-devel bzip2 sqlite
sudo yum -y install  zlib-devel bzip2 bzip2-devel readline-devel sqlite sqlite-devel openssl-devel

pyenv

git clone https://github.com/yyuu/pyenv.git ~/.pyenv

.bashrcに追加　

export PYENV_ROOT=$HOME/.pyenv
export PATH=$PYENV_ROOT/bin:$PATH
eval "$(pyenv init -)"

python install

. ~/.bashrc
pyenv install 3.6.2
pyenv global 3.6.2

mpi4pyを導入

pip install mpi4py

chainermn

wget https://github.com/NVIDIA/nccl/archive/v1.2.3-1+cuda7.5.tar.gz
tar zxvfp v1.2.3-1+cuda7.5.tar.gz 
cd nccl-1.2.3-1-cuda7.5/
make 
sudo make install

pip install chainer python chainermn