Once you have installed the Centos 7 ARM version onto your Raspberry Pi 2, you just follow the normal steps of installing getstream:
yum install wget libevent-devel libglib2 git make gcc glib2-devel gcc-c++ which yum-utils rpm-build
mkdir ~/git
cd ~/git
git clone git://pax.zz.de/getstream.git # this downloads the source into your git directory
# Home page: https://silicon-verl.de/home/flo/projects/streaming/
# Alternative location: (fork): https://github.com/jannic/getstream or https://github.com/sbluhm/getstream
cd getstream
make -j2 # Use the j2 flag to use both processor cores for compiling.
cp getstream /usr/bin
cat <<EOF > /etc/systemd/system/tv.service
[Unit]
Description=TV Service
After=syslog.target network.target
[Service]
Type=simple
ExecStart=/usr/bin/getstream -c /etc/getstream.conf
[Install]
WantedBy=multi-user.target
EOF
systemctl daemon-reload
systemctl enable tv.service
Now you just need to create your config file and open the firewall ports