Chapter 46. ZookeeperClusterSpec schema reference Used in: KafkaSpec Full list of ZookeeperClusterSpec schema properties Configures a ZooKeeper cluster. 46.1. config Use the config properties to configure ZooKeeper options as keys. The values can be one of the following JSON types: String Number Boolean Exceptions You can specify and configure the options listed in the ZooKeeper documentation . However, Streams for Apache Kafka takes care of configuring and managing options related to the following, which cannot be changed: Security (encryption, authentication, and authorization) Listener configuration Configuration of data directories ZooKeeper cluster composition Properties with the following prefixes cannot be set: 4lw.commands.whitelist authProvider clientPort dataDir dataLogDir quorum.auth reconfigEnabled requireClientAuthScheme secureClientPort server. snapshot.trust.empty standaloneEnabled serverCnxnFactory ssl. sslQuorum If the config property contains an option that cannot be changed, it is disregarded, and a warning message is logged to the Cluster Operator log file. All other supported options are forwarded to ZooKeeper, including the following exceptions to the options configured by Streams for Apache Kafka: Any ssl configuration for supported TLS versions and cipher suites Example ZooKeeper configuration apiVersion: kafka.strimzi.io/v1beta2 kind: Kafka spec: kafka: # ... zookeeper: # ... config: autopurge.snapRetainCount: 3 autopurge.purgeInterval: 2 # ... 46.2. logging ZooKeeper has a configurable logger: zookeeper.root.logger ZooKeeper uses the Apache log4j logger implementation. Use the logging property to configure loggers and logger levels. You can set the log levels by specifying the logger and level directly (inline) or use a custom (external) ConfigMap. If a ConfigMap is used, you set logging.valueFrom.configMapKeyRef.name property to the name of the ConfigMap containing the external logging configuration. Inside the ConfigMap, the logging configuration is described using log4j.properties . Both logging.valueFrom.configMapKeyRef.name and logging.valueFrom.configMapKeyRef.key properties are mandatory. A ConfigMap using the exact logging configuration specified is created with the custom resource when the Cluster Operator is running, then recreated after each reconciliation. If you do not specify a custom ConfigMap, default logging settings are used. If a specific logger value is not set, upper-level logger settings are inherited for that logger. For more information about log levels, see Apache logging services . Here we see examples of inline and external logging. The inline logging specifies the root logger level. You can also set log levels for specific classes or loggers by adding them to the loggers property. Inline logging apiVersion: kafka.strimzi.io/v1beta2 kind: Kafka spec: # ... zookeeper: # ... logging: type: inline loggers: zookeeper.root.logger: INFO log4j.logger.org.apache.zookeeper.server.FinalRequestProcessor: TRACE log4j.logger.org.apache.zookeeper.server.ZooKeeperServer: DEBUG # ... Note Setting a log level to DEBUG may result in a large amount of log output and may have performance implications. External logging apiVersion: kafka.strimzi.io/v1beta2 kind: Kafka spec: # ... zookeeper: # ... logging: type: external valueFrom: configMapKeyRef: name: customConfigMap key: zookeeper-log4j.properties # ... Garbage collector (GC) Garbage collector logging can also be enabled (or disabled) using the jvmOptions property . 46.3. ZookeeperClusterSpec schema properties Property Property type Description replicas integer The number of pods in the cluster. image string The container image used for ZooKeeper pods. If no image name is explicitly specified, it is determined based on the Kafka version set in spec.kafka.version . The image names are specifically mapped to corresponding versions in the Cluster Operator configuration. storage EphemeralStorage , PersistentClaimStorage Storage configuration (disk). Cannot be updated. config map The ZooKeeper broker config. Properties with the following prefixes cannot be set: server., dataDir, dataLogDir, clientPort, authProvider, quorum.auth, requireClientAuthScheme, snapshot.trust.empty, standaloneEnabled, reconfigEnabled, 4lw.commands.whitelist, secureClientPort, ssl., serverCnxnFactory, sslQuorum (with the exception of: ssl.protocol, ssl.quorum.protocol, ssl.enabledProtocols, ssl.quorum.enabledProtocols, ssl.ciphersuites, ssl.quorum.ciphersuites, ssl.hostnameVerification, ssl.quorum.hostnameVerification). livenessProbe Probe Pod liveness checking. readinessProbe Probe Pod readiness checking. jvmOptions JvmOptions JVM Options for pods. jmxOptions KafkaJmxOptions JMX Options for Zookeeper nodes. resources ResourceRequirements CPU and memory resources to reserve. metricsConfig JmxPrometheusExporterMetrics Metrics configuration. logging InlineLogging , ExternalLogging Logging configuration for ZooKeeper. template ZookeeperClusterTemplate Template for ZooKeeper cluster resources. The template allows users to specify how the OpenShift resources are generated.

Commands:
apiVersion: kafka.strimzi.io/v1beta2 kind: Kafka spec: kafka: # zookeeper: # config: autopurge.snapRetainCount: 3 autopurge.purgeInterval: 2 #
apiVersion: kafka.strimzi.io/v1beta2 kind: Kafka spec: # zookeeper: # logging: type: inline loggers: zookeeper.root.logger: INFO log4j.logger.org.apache.zookeeper.server.FinalRequestProcessor: TRACE log4j.logger.org.apache.zookeeper.server.ZooKeeperServer: DEBUG #
apiVersion: kafka.strimzi.io/v1beta2 kind: Kafka spec: # zookeeper: # logging: type: external valueFrom: configMapKeyRef: name: customConfigMap key: zookeeper-log4j.properties #