Riak Bootstrap

01-packages.sh

# Make sure the log directory is writable
sudo chmod a+rw /var/log

# We need a few tools to make this tick
sudo yum install -y mdadm git boost{,-devel} automake libtool flex bison pkgconfig gcc-c++ {libevent,python,zlib,ruby,ncurses,openssl}{,-devel} make

# Make sure the log directory is writable
sudo chmod a+rw /var/log

02-raid.sh

# Unmount the default-mounted ephemeral drive
sudo umount /media/ephemeral0/

# Now create a software raid and write it to the configuration
yes | sudo mdadm --create --verbose /dev/md0 --level=stripe --raid-devices=4 /dev/xvd{b,c,d,e}
sudo mdadm --detail --scan | sudo tee -a /etc/mdadm.conf

# Edit /etc/fstab and replace the last line with:
sudo sed -i '$ d' /etc/fstab
echo '/dev/md0    /media/raid ext4    noatime,barrier=0,data=writeback 0   0' | sudo tee -a /etc/fstab

# Now make an ext4 on /dev/md0
sudo mkfs.ext4 /dev/md0

# And load it
sudo mkdir /media/raid
sudo mount /media/raid

03-erlang.sh

# We need erlang in order to build Riak
cd && mkdir erlang && cd erlang

curl -OL http://erlang.org/download/otp_src_R15B01.tar.gz
tar xf otp_src_R15B01.tar.gz
cd otp_src_R15B01

# Do the magics
./configure && make -j8 && sudo make install

04-sysctl.sh

# These are the settings recommended by Riak for using the leveldb backend
echo "net.core.wmem_default=8388608
net.core.rmem_default=8388608
net.core.wmem_max=8388608
net.core.rmem_max=8388608
net.core.netdev_max_backlog=10000
net.core.somaxconn=4000
net.ipv4.tcp_max_syn_backlog=40000
net.ipv4.tcp_fin_timeout=15
net.ipv4.tcp_tw_reuse=1
vm.swappiness=0" | sudo tee -a /etc/sysctl.conf

# And now make sure they're loaded correctly
sudo sysctl -p

05-riak.sh

# And now, we build Riak from source
cd && mkdir riak && cd riak

curl -O http://downloads.basho.com.s3-website-us-east-1.amazonaws.com/riak/CURRENT/riak-1.2.1.tar.gz
tar xf riak-1.2.1.tar.gz 
cd riak-1.2.1

# Now do the magics
make rel

# To make sure that riak is in the user path
echo "export PATH=$PATH:/home/ec2-user/riak/riak-1.2.1/rel/riak/bin" >> ~/.bash_profile
source ~/.bash_profile

# And now for the configuration
INTERNAL_IP_ADDRESS=`ifconfig eth0 | grep "inet addr" | awk -F: '{print $2}' | awk '{print $1}'`
RIAK_CONF_PATH=/home/ec2-user/riak/riak-1.2.1/rel/riak/etc/app.config
RIAK_VM_PATH=/home/ec2-user/riak/riak-1.2.1/rel/riak/etc/vm.args
RIAK_DIR=/media/raid/riak
RIAK_DATA_PATH=$RIAK_DIR/data

sudo mkdir -p $RIAK_DATA_PATH
sudo chown -R ec2-user:ec2-user $RIAK_DIR

sed -i "s#riak_kv_bitcask_backend#riak_kv_eleveldb_backend#" $RIAK_CONF_PATH
sed -i "s#127.0.0.1#$INTERNAL_IP_ADDRESS#" $RIAK_CONF_PATH
sed -i "s#./data#$RIAK_DATA_PATH#" $RIAK_CONF_PATH
sed -i "s#127.0.0.1#$INTERNAL_IP_ADDRESS#" $RIAK_VM_PATH