Dynamic Configuration Zookeeper Implementation

Zookeeper is also supported as a Dynamic Configuration Center (DCC). To use it, please configure it as follows:

configuration:
  selector: ${SW_CONFIGURATION:zookeeper}
  zookeeper:
    period: ${SW_CONFIG_ZK_PERIOD:60} # Unit seconds, sync period. Default fetch every 60 seconds.
    namespace: ${SW_CONFIG_ZK_NAMESPACE:/default}
    hostPort: ${SW_CONFIG_ZK_HOST_PORT:localhost:2181}
    # Retry Policy
    baseSleepTimeMs: ${SW_CONFIG_ZK_BASE_SLEEP_TIME_MS:1000} # initial amount of time to wait between retries
    maxRetries: ${SW_CONFIG_ZK_MAX_RETRIES:3} # max number of times to retry

The namespace is the ZooKeeper path. The config key and value are the properties of the namespace folder.

Config Storage

Single Config

znode.path = {namespace}/configKey
configValue = znode.data

e.g. The config is:

{agent-analyzer.default.slowDBAccessThreshold}:{default:200,mongodb:50}

If namespace = /default the config in zookeeper is:

znode.path = /default/agent-analyzer.default.slowDBAccessThreshold
znode.data = default:200,mongodb:50

Group Config

znode.path = {namespace}/configKey
znode.child1.path = {znode.path}/subItemkey1
znode.child2.path = {znode.path}/subItemkey2
...
subItemValue1 = znode.child1.data
subItemValue2 = znode.child2.data
...