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cassandra-setup.md

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Cassandra setup

  • Set up Pegasus
  • Create master node: peg up cassandra-master.yml
    • You can create this from cassandra-master-template.yml, but you will need to fill in:
      • Subnet ID
      • Name of .pem file you would use to SSH into the instances
        • Only the filename, without the extension (.pem part)!
      • Security group
        • Multiple security groups are not supported!
        • I suggest making a single security group with all the rules for each of your clusters.
        • You can also assign the security group after manually.
  • Create worker nodes: peg up cassandra-workers.yml
    • You can create this from cassandra-workers-template.yml, but you will need to fill in:
      • Subnet ID
      • Name of .pem file you would use to SSH into the instances
        • Only the filename, without the extension (.pem part)!
      • Security group
        • Multiple security groups are not supported!
        • I suggest making a single security group with all the rules for each of your clusters.
        • You can also assign the security group after manually.
  • Fetch with peg fetch cassandra-cluster
  • Install SSH: peg install cassandra-cluster ssh
  • Install AWS credentials: peg install cassandra-cluster aws
  • Finally Cassandra: peg install cassandra-cluster cassandra
  • Now start Cassandra: peg service cassandra-cluster cassandra start (if console gets stuck, Ctrl+C is safe)

This will create one node running Cassandra 3.11.2 as a master, and two worker nodes. You can get a description with peg describe cassandra-cluster.

Manual administration

You can use cqlsh on the node to administer.

Version

To check Cassandra version, cqlsh and then show version.

Stopping when not in use

When you're not using the cluster, you can stop it temporarily to avoid being billed.

  • Stop Cassandra: peg service cassandra-cluster cassandra stop
  • Stop cluster: peg stop cassandra-cluster (answer y)

Resuming

You have to start the services in the correct order:

  • Start cluster: peg start cassandra-cluster
  • Start Cassandra: peg service cassandra-cluster cassandra start