Installing redis server in AWS servers for sockets io connections in nodejs

install-redis-in-linux-server.sh

https://redis.io/topics/quickstart

wget http://download.redis.io/redis-stable.tar.gz
tar xvzf redis-stable.tar.gz
cd redis-stable
make distclean
make # If this throws an error
# Do
cd deps 
make hiredis lua jemalloc linenoise
cd ..
make
make test # If test fails with You need tcl 8.5 or newer in order to run the Redis test
sudo yum install -y tcl
make test

# Set Overcommit to TRUE

# Redis is going to complain unless you have some level of overcommit memory enabled. 
# This is easy to do (again, you must be root or sudoer to do this). 
# Add ‘vm.overcommit_memory = 1’ to /etc/sysctl.conf and then reboot, 
# IF you can safely do so on your machine 
# (best to check and make sure there are no live service interruptions or other personnel using the system).
vi /etc/sysctl.conf

## Add this to the end of the file:
# Required by Redis to enable overcommit setting:
vm.overcommit_memory = 1

# OR RUN
sudo sysctl vm.overcommit_memory=1

# To start redis server RUN
redis-server # If throws 'redis-server: command not found' Error

sudo cp src/redis-server /usr/local/bin/
sudo cp src/redis-cli /usr/local/bin/
# Run 
redis-server

# Config changes required to start redis server in Proper mode

sudo mkdir /etc/redis
sudo mkdir /var/redis
sudo cp utils/redis_init_script /etc/init.d/redis_6379
sudo vi /etc/init.d/redis_6379 # REDISPORT to 6379
sudo cp redis.conf /etc/redis/6379.conf
sudo mkdir /var/redis/6379
# Edit the configuration file, making sure to perform the following changes:
# Set daemonize to no (by default it is set to no).
# Set the pidfile to /var/run/redis_6379.pid (modify the port if needed).
# Change the port accordingly. In our example it is not needed as the default port is already 6379.
# Set your preferred loglevel.
# Set the logfile to /var/log/redis_6379.log
# Set the dir to /var/redis/6379 (very important step!)


sudo chkconfig redis_6379 defaults # Add the new Redis init script to all the default runlevels
sudo /etc/init.d/redis_6379 start # To start server

# TO daemonize redis server
sudo vi /etc/systemd/system/redis.service
# Add following lines to it
# Start of Copy
[Unit]
Description=Redis
After=syslog.target

[Service]
ExecStart=/usr/local/bin/redis-server /etc/redis/6379.conf
RestartSec=5s
Restart=on-success

[Install]
WantedBy=multi-user.target

# END of Copy

sudo systemctl enable /etc/systemd/system/redis.service
sudo systemctl start redis # To start service
sudo systemctl status redis # To check redis status