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Dynamic Configuration

SkyWalking Configurations mostly are set through application.yml and OS system environment variables. But some of them are supporting dynamic settings from upstream management system.

Right now, SkyWalking supports following dynamic configurations.

Config Key	Value Description	Value Format Example
receiver-trace.default.slowDBAccessThreshold	Thresholds of slow Database statement, override `receiver-trace/default/slowDBAccessThreshold` of `applciation.yml`.	default:200,mongodb:50
receiver-trace.default.uninstrumentedGateways	The uninstrumented gateways, override `gateways.yml`.	same as `gateways.yml`
alarm.default.alarm-settings	The alarm settings, will override `alarm-settings.yml`.	same as `alarm-settings.yml`
core.default.apdexThreshold	The apdex threshold settings, will override `service-apdex-threshold.yml`.	same as `service-apdex-threshold.yml`

This feature depends on upstream service, so it is OFF as default.

configuration:
  none:

Dynamic Configuration Service, DCS

Dynamic Configuration Service is a gRPC service, which requires the upstream system implemented. The SkyWalking OAP fetches the configuration from the implementation(any system), after you open this implementation like this.

configuration:
  grpc:
    # Upstream system hostname
    host: 127.0.0.1
    # Upstream system port
    port: 9555
    #period : 60 # Unit seconds, sync period. Default fetch every 60 seconds.
    #clusterName: "default" # the name of current cluster, set the name if you want to upstream system known.

Dynamic Configuration Apollo Implementation

Apollo is also supported as DCC(Dynamic Configuration Center), to use it, just configured as follows:

configuration:
  apollo:
    apolloMeta: <your apollo meta address>
    apolloCluster: default
    # apolloEnv: # defaults to null
    appId: skywalking
    period: 5

Dynamic Configuration Nacos Implementation

Nacos is also supported as DCC(Dynamic Configuration Center), to use it, please configure as follows:

configuration:
  nacos:
    # Nacos Server Host
    serverAddr: 127.0.0.1
    # Nacos Server Port
    port: 8848
    # Nacos Configuration Group
    group: 'skywalking'
    # Nacos Configuration namespace
    namespace: ''
    # Unit seconds, sync period. Default fetch every 60 seconds.
    period : 60
    # the name of current cluster, set the name if you want to upstream system known.
    clusterName: "default"

Dynamic Configuration Zookeeper Implementation

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

configuration:
  zookeeper:
    period : 60 # Unit seconds, sync period. Default fetch every 60 seconds.
    nameSpace: /default
    hostPort: localhost:2181
    #Retry Policy
    baseSleepTimeMs: 1000 # initial amount of time to wait between retries
    maxRetries: 3 # max number of times to retry

Dynamic Configuration Etcd Implementation

Etcd is also supported as DCC(Dynamic Configuration Center), to use it, please configure as follows:

configuration:
  etcd:
    period : 60 # Unit seconds, sync period. Default fetch every 60 seconds.
    group :  'skywalking'
    serverAddr: localhost:2379
    clusterName: "default"

Dynamic Configuration Consul Implementation

Consul is also supported as DCC(Dynamic Configuration Center), to use it, please configure as follows:

configuration:
  consul:
    # Consul host and ports, separated by comma, e.g. 1.2.3.4:8500,2.3.4.5:8500
    hostAndPorts: 127.0.0.1:8500
    # Sync period in seconds. Defaults to 60 seconds.
    period: 60

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