Backend Specific Settings

Configuration settings in the cassandra-reaper.yaml that are specific to a particular backend.

Cassandra Settings

The following settings are specific to a Reaper deployment that is backed by an Apache Cassandra database. Note that Cassandra backend configuration relies on the Dropwizard-Cassandra module.


activateQueryLogger

Type: Boolean

Default: false

Records the CQL calls made to the Cassandra backend in the log output.


cassandra

Settings to configure Reaper to use Cassandra for storage of its control data. Reaper uses the Cassandra Java driver version 3.1.4 to perform operations on the cluster. An example of the configuration settings for the driver are as follows.

cassandra:
  clusterName: "test"
  contactPoints: ["127.0.0.1"]
  keyspace: reaper_db
  loadBalancingPolicy:
    type: tokenAware
    shuffleReplicas: true
    subPolicy:
      type: dcAwareRoundRobin
      localDC:
      usedHostsPerRemoteDC: 0
      allowRemoteDCsForLocalConsistencyLevel: false
  authProvider:
    type: plainText
    username: cassandra
    password: cassandra

Definitions for some of the above sub-settings are as follows.

clusterName

Type: String

Name of the cluster to use to store the Reaper control data.

contactPoints

Type: Array (comma separated Strings)

Seed nodes in the Cassandra cluster to contact.

["127.0.0.1", "127.0.0.2", "127.0.0.3"]

keyspace

Type: String

Name of the keyspace to store the Reaper control data.

loadBalancingPolicy

Settings to configure the policies used to generate the query plan which determines the nodes to connect to when performing query operations. Further information can be found in the Cassandra Java driver Load balancing section.

subPolicy

Settings to configure a child policy which used if the initial policy fails to determine a node to connect to.

type

Type: String

The policy type used to contribute to the computation of the query plan.

localDC

Type: String

Specifies the name of the datacenter closest to Reaper when using the dcAwareRoundRobin policy.

authProvider

If native protocol authentication is enabled on Cassandra, settings configure Reaper to pass credentials to Cassandra when establishing a connection.

username

Type: String

Cassandra native protocol username.

password

Type: String

Cassandra native protocol password.

H2 or Postgres Database Settings

The following settings are specific to a Reaper deployment that is backed by either a H2 or Postgres database. An example of the configuration settings for a Postgres database are as follows.

postgres:
  url: jdbc:postgresql://127.0.0.1/reaper
  user: postgres
  password:

Definitions for the above sub-settings are as follows.


h2

Settings to configure Reaper to use H2 for storage of its control data.

postgres

Settings to configure Reaper to use Postgres for storage of its control data.

driverClass

Type: String

WARNING this setting is DEPRECATED and its usage should be avoided.

Specifies the driver to use to connect to the database.

url

Type: String

Specifies the URL to connect to the database (either H2 or Postgres) on.

user

Type: String

Database username.

password

Type: String

Database password.