install-cassandra-on-aws-redhat-instance.sh

sudo yum -y update

sudo yum install java

java -version
echo $JAVA_HOME 
#If you get a null or blank output, you will need to manually set the JAVA_HOME variable.
sudo vi ~/.bash_profile
# ADD following lines
export JAVA_HOME=/usr/java/jdk1.8.0_191/
export JRE_HOME=/usr/java/jdk1.8.0_191/jre
# :qw! save & quit
source ~/.bash_profile
echo $JAVA_HOME # Should print 1.8.0_191

## Installing Cassandra
sudo vi /etc/yum.repos.d/cassandra.repo

# Add the lines 
[cassandra]
name=Apache Cassandra
baseurl=https://www.apache.org/dist/cassandra/redhat/311x/
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://www.apache.org/dist/cassandra/KEYS

sudo yum -y install cassandra
sudo systemctl daemon-reload

sudo systemctl start cassandra
sudo systemctl enable cassandra # To enable Cassandra to automatically start at boot time
sudo systemctl status cassandra


# ENV file location
sudo vi /etc/cassandra/default.conf/cassandra-env.sh

## Yaml file location 
sudo vi /etc/cassandra/conf/cassandra.yaml

# Set these values
cluster_name: 'Test Cluster'
auto_bootstrap: false
listen_address: 10.0.0.197
broadcast_address: 10.0.0.197
rpc_address: 0.0.0.0
broadcast_rpc_address: 52.205.10.16
start_rpc: true
seed_provider:
    - class_name: org.apache.cassandra.locator.SimpleSeedProvider
      parameters:
          - seeds: "10.0.0.197"


# Check if Cassandra is running
nodetool status

# ==> Should output
```
Datacenter: datacenter1
=======================
Status=Up/Down
|/ State=Normal/Leaving/Joining/Moving
--  Address        Load       Tokens       Owns (effective)  Host ID                               Rack
UN  172.31.37.153  160.71 KiB  256          100.0%            8c2a48b8-cdad-401a-8b97-0c7473d1e67b  rack1
```

# Log files location
tail -f /var/log/cassandra/cassandra.log

## To rename the cluster
cqlsh> UPDATE system.local SET cluster_name = 'New Cluster' where key='local';
cqlsh> quit

nodetool flush

sudo vi /etc/cassandra/conf/cassandra.yaml
>> cluster_name: 'New Cluster'

## Check remote connection
cqlsh <public IP>

# If above connection fails
sudo vi /etc/cassandra/default.conf/cassandra-env.sh

# >> Uncomment following line & replace <public name> with public IP
JVM_OPTS="$JVM_OPTS -Djava.rmi.server.hostname=<public ip>"



## OPEN PORT 9042 in AWS Security group