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Installing Apache Cassandra 3-Node Cluster

Setup

  • Server Setup
    • ServerIP AddressSeed Node
    cassandra-1192.168.50.37seed node
    cassandra-2192.168.50.38
    cassandra-3192.168.50.39

  • Packages
    • PackageVersionInstall Location
    Apache Cassandra4.0.0/opt/apache-cassandra-4.0.0/
    Javajdk1.8.0_241/opt/jdk1.8.0_241
    Pythonpython-2.7.5-76.el7.x86_64/usr/bin/python

    Prerequisites

  • Install Cassandra on three servers.

    • Follow the steps in below document to complete Cassandra install


    How to Install Cassandra Software

    Cluster Configuration

    • Update the cassandra configuration file for setting up 3-node cluster
      • # vi /opt/apache-cassandra-4.0.0/conf/cassandra.yaml
      Node-1 Configuration cluster_name: 'LTS Cluster' num_tokens: 256 seeds: "192.168.50.37" listen_address: 192.168.50.37 rpc_address: 192.168.50.37 endpoint_snitch: GossipingPropertyFileSnitch
      Node-2 Configuration cluster_name: 'LTS Cluster' num_tokens: 256 seeds: "192.168.50.37" listen_address: 192.168.50.38 rpc_address: 192.168.50.38 endpoint_snitch: GossipingPropertyFileSnitch
      Node-3 Configuration cluster_name: 'LTS Cluster' num_tokens: 256 seeds: "192.168.50.37" listen_address: 192.168.50.39 rpc_address: 192.168.50.39 endpoint_snitch: GossipingPropertyFileSnitch
    • Update the cassandra rack properties file to use custom datacenter name

      • Use the same parameters on all three nodes

      # vi /opt/apache-cassandra-4.0.0/conf/cassandra-rackdc.properties dc=LTS-DC1 rack=rack1

    Start Cassandra Service

  • Start cassandra service on all three nodes
    • # systemctl start cassandra
  • Check the status of service on all three nodes
    • # systemctl status cassandra
    Node-1 output cassandra.service - LSB: distributed storage system for structured data Loaded: loaded (/etc/rc.d/init.d/cassandra; bad; vendor preset: disabled) Active: active (running) since Sun 2021-08-22 21:26:26 EDT; 2min 28s ago Docs: man:systemd-sysv-generator(8) Process: 3955 ExecStart=/etc/rc.d/init.d/cassandra start (code=exited, status=0/SUCCESS) Main PID: 4040 (java) CGroup: /system.slice/cassandra.service 4040 /opt/jdk1.8.0_241/bin/java -ea -da:net.openhft... -XX:+UseThreadPriorities -XX:+HeapDumpOnOutOfMemoryError -Xss256k -XX:+AlwaysPreTouch -... Aug 22 21:26:17 cassandra-1.linuxtechspace.com systemd[1]: Starting LSB: distributed storage system for structured data... Aug 22 21:26:17 cassandra-1.linuxtechspace.com runuser[3963]: pam_unix(runuser:session): session opened for user cassandra by (uid=0) Aug 22 21:26:26 cassandra-1.linuxtechspace.com cassandra[3955]: Starting Cassandra: OK Aug 22 21:26:26 cassandra-1.linuxtechspace.com systemd[1]: Started LSB: distributed storage system for structured data.
    Node-2 output cassandra.service - LSB: distributed storage system for structured data Loaded: loaded (/etc/rc.d/init.d/cassandra; bad; vendor preset: disabled) Active: active (running) since Sun 2021-08-22 21:27:02 EDT; 1min 59s ago Docs: man:systemd-sysv-generator(8) Process: 4874 ExecStart=/etc/rc.d/init.d/cassandra start (code=exited, status=0/SUCCESS) Main PID: 4959 (java) CGroup: /system.slice/cassandra.service 4959 /opt/jdk1.8.0_241/bin/java -ea -da:net.openhft... -XX:+UseThreadPriorities -XX:+HeapDumpOnOutOfMemoryError -Xss256k -XX:+AlwaysPreTouch -... Aug 22 21:26:55 cassandra-2.linuxtechspace.com systemd[1]: Starting LSB: distributed storage system for structured data... Aug 22 21:26:55 cassandra-2.linuxtechspace.com runuser[4882]: pam_unix(runuser:session): session opened for user cassandra by (uid=0) Aug 22 21:27:02 cassandra-2.linuxtechspace.com cassandra[4874]: Starting Cassandra: OK Aug 22 21:27:02 cassandra-2.linuxtechspace.com systemd[1]: Started LSB: distributed storage system for structured data.
    Node-3 output cassandra.service - LSB: distributed storage system for structured data Loaded: loaded (/etc/rc.d/init.d/cassandra; bad; vendor preset: disabled) Active: active (running) since Sun 2021-08-22 21:35:42 EDT; 59s ago Docs: man:systemd-sysv-generator(8) Process: 5195 ExecStart=/etc/rc.d/init.d/cassandra start (code=exited, status=0/SUCCESS) Main PID: 5278 (java) CGroup: /system.slice/cassandra.service 5278 /opt/jdk1.8.0_241/bin/java -ea -da:net.openhft... -XX:+UseThreadPriorities -XX:+HeapDumpOnOutOfMemoryError -Xss256k -XX:+AlwaysPreTouch -... Aug 22 21:35:41 cassandra-3.linuxtechspace.com systemd[1]: Starting LSB: distributed storage system for structured data... Aug 22 21:35:41 cassandra-3.linuxtechspace.com runuser[5201]: pam_unix(runuser:session): session opened for user cassandra by (uid=0) Aug 22 21:35:42 cassandra-3.linuxtechspace.com cassandra[5195]: Starting Cassandra: OK Aug 22 21:35:42 cassandra-3.linuxtechspace.com systemd[1]: Started LSB: distributed storage system for structured data.
  • Check the status of cluster using "nodetool" command. All three nodes should list in the output.
    • # /opt/apache-cassandra-4.0.0/bin/nodetool status Datacenter: LTS-DC1 =================== Status=Up/Down |/ State=Normal/Leaving/Joining/Moving -- Address Load Tokens Owns (effective) Host ID Rack UN 192.168.50.37 78.51 KiB 256 66.0% d087f297-9a23-4971-bfa9-2226db8d8253 rack1 UN 192.168.50.38 73.53 KiB 256 60.0% 44791886-46c0-43f2-ba37-3d0a37e0dbd2 rack1 UN 192.168.50.39 191.46 KiB 256 74.0% fe151fce-868b-43f0-81f3-a32cc1f1f2d1 rack1
  • Cassandra's 3-Node cluster Install and Configuration is now complete.

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