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· 6 min read
aiceflower

Foreword#

With the development of business and the update and iteration of community products, we found that Linkis1 There are too many .X services, and services can be merged appropriately to reduce the number of services and facilitate deployment and debugging. At present, Linkis services are mainly divided into three categories, including computing governance services (CG: entrance/ecp/ecm/linkismanager), public enhancement services (PS: publicservice/datasource/cs) and microservice governance services (MG: Gateway/Eureka) . There are too many sub-services extended by these three types of services, and services can be merged, so that all PS services can be merged, CG services can be merged, and ecm services can be separated out.

Service merge changes#

The main changes of this service merge are as follows:

  • Support Restful service forwarding: The modification point is mainly the forwarding logic of Gateway, similar to the current publicservice service merge parameter: wds.linkis.gateway.conf.publicservice.list
  • Support Change the remote call of the RPC service to a local call, similar to LocalMessageSender, and now it is possible to complete the return of the local call by changing the Sender
  • Configuration file changes
  • Service start and stop script changes

To be achieved#

  • Basic goal: merge PS services into one service
  • Basic goal: merge CG service into CG-Service and ECM
  • Advanced goal: merge CG services into one server
  • Final goal: remove eureka, gateway into single service

Specific changes#

Gateway changes (org.apache.linkis.gateway.ujes.route.HaContextGatewayRouter)#

//Override before changing def route(gatewayContext: GatewayContext): ServiceInstance = { 
    if (gatewayContext.getGatewayRoute.getRequestURI.contains(HaContextGatewayRouter.CONTEXT_SERVICE_STR) ||         gatewayContext.getGatewayRoute.getRequestURI.contains(HaContextGatewayRouter.OLD_CONTEXT_SERVICE_PREFIX)){       val params: util.HashMap[String, String] = gatewayContext.getGatewayRoute.getParams       if (!gatewayContext.getRequest.getQueryParams.isEmpty) {         for ((k, vArr) <- gatewayContext.getRequest.getQueryParams) {          if (vArr.nonEmpty) {            params.putIfAbsent(k, vArr.head)          }        }      }      if (gatewayContext.getRequest.getHeaders.containsKey(ContextHTTPConstant.CONTEXT_ID_STR)) {        params.putIfAbsent(ContextHTTPConstant.CONTEXT_ID_STR, gatewayContext.getRequest.getHeaders.get(ContextHTTPConstant.CONTEXT_ID_STR)(0))      }      if (null == params || params.isEmpty) {        dealContextCreate(gatewayContext)      } else {        var contextId : String = null        for ((key, value) <- params) {          if (key.equalsIgnoreCase(ContextHTTPConstant.CONTEXT_ID_STR)) {            contextId = value            }        }        if (StringUtils.isNotBlank(contextId)) {          dealContextAccess(contextId.toString, gatewayContext)        } else {          dealContextCreate(gatewayContext)        }      }    }else{      null    }  }  //after modification  override def route(gatewayContext: GatewayContext): ServiceInstance = {
    if (        gatewayContext.getGatewayRoute.getRequestURI.contains(          RPCConfiguration.CONTEXT_SERVICE_REQUEST_PREFIX        )    ) {      val params: util.HashMap[String, String] = gatewayContext.getGatewayRoute.getParams      if (!gatewayContext.getRequest.getQueryParams.isEmpty) {        for ((k, vArr) <- gatewayContext.getRequest.getQueryParams.asScala) {          if (vArr.nonEmpty) {            params.putIfAbsent(k, vArr.head)          }        }      }      if (gatewayContext.getRequest.getHeaders.containsKey(ContextHTTPConstant.CONTEXT_ID_STR)) {        params.putIfAbsent(          ContextHTTPConstant.CONTEXT_ID_STR,          gatewayContext.getRequest.getHeaders.get(ContextHTTPConstant.CONTEXT_ID_STR)(0)        )      }      if (null == params || params.isEmpty) {        dealContextCreate(gatewayContext)      } else {        var contextId: String = null        for ((key, value) <- params.asScala) {          if (key.equalsIgnoreCase(ContextHTTPConstant.CONTEXT_ID_STR)) {            contextId = value          }        }        if (StringUtils.isNotBlank(contextId)) {          dealContextAccess(contextId, gatewayContext)        } else {          dealContextCreate(gatewayContext)        }      }    } else {      null    }  }

  // before modification  def dealContextCreate(gatewayContext:GatewayContext):ServiceInstance = {    val serviceId =  findService(HaContextGatewayRouter.CONTEXT_SERVICE_STR, list => {      val services = list.filter(_.contains(HaContextGatewayRouter.CONTEXT_SERVICE_STR))      services.headOption    })    val serviceInstances = ServiceInstanceUtils.getRPCServerLoader.getServiceInstances(serviceId.orNull)    if (serviceInstances.size > 0) {      val index = new Random().nextInt(serviceInstances.size)      serviceInstances(index)    } else {      logger.error(s"No valid instance for service : " + serviceId.orNull)      null    }  }  //after modification  def dealContextCreate(gatewayContext: GatewayContext): ServiceInstance = {    val serviceId = findService(      RPCConfiguration.CONTEXT_SERVICE_NAME,      list => {        val services = list.filter(_.contains(RPCConfiguration.CONTEXT_SERVICE_NAME))        services.headOption      }    )    val serviceInstances =      ServiceInstanceUtils.getRPCServerLoader.getServiceInstances(serviceId.orNull)    if (serviceInstances.size > 0) {      val index = new Random().nextInt(serviceInstances.size)      serviceInstances(index)    } else {      logger.error(s"No valid instance for service : " + serviceId.orNull)      null    }  }
  // before modification  def dealContextAccess(contextIdStr:String, gatewayContext: GatewayContext):ServiceInstance = {    val contextId : String = {      var tmpId : String = null      if (serializationHelper.accepts(contextIdStr)) {        val contextID : ContextID = serializationHelper.deserialize(contextIdStr).asInstanceOf[ContextID]        if (null != contextID) {          tmpId = contextID.getContextId        } else {          logger.error(s"Deserializate contextID null. contextIDStr : " + contextIdStr)        }      } else {        logger.error(s"ContxtIDStr cannot be deserialized. contextIDStr : " + contextIdStr)      }      if (null == tmpId) {        contextIdStr      } else {        tmpId      }    }    val instances = contextIDParser.parse(contextId)    var serviceId:Option[String] = None    serviceId = findService(HaContextGatewayRouter.CONTEXT_SERVICE_STR, list => {      val services = list.filter(_.contains(HaContextGatewayRouter.CONTEXT_SERVICE_STR))        services.headOption      })    val serviceInstances = ServiceInstanceUtils.getRPCServerLoader.getServiceInstances(serviceId.orNull)    if (instances.size() > 0) {      serviceId.map(ServiceInstance(_, instances.get(0))).orNull    } else if (serviceInstances.size > 0) {      serviceInstances(0)    } else {      logger.error(s"No valid instance for service : " + serviceId.orNull)      null    }  }
}//after modificationdef dealContextAccess(contextIdStr: String, gatewayContext: GatewayContext): ServiceInstance = {    val contextId: String = {      var tmpId: String = null      if (serializationHelper.accepts(contextIdStr)) {        val contextID: ContextID =          serializationHelper.deserialize(contextIdStr).asInstanceOf[ContextID]        if (null != contextID) {          tmpId = contextID.getContextId        } else {          logger.error(s"Deserializate contextID null. contextIDStr : " + contextIdStr)        }      } else {        logger.error(s"ContxtIDStr cannot be deserialized. contextIDStr : " + contextIdStr)      }      if (null == tmpId) {        contextIdStr      } else {        tmpId      }    }    val instances = contextIDParser.parse(contextId)    var serviceId: Option[String] = None    serviceId = findService(      RPCConfiguration.CONTEXT_SERVICE_NAME,      list => {        val services = list.filter(_.contains(RPCConfiguration.CONTEXT_SERVICE_NAME))        services.headOption      }    )    val serviceInstances =      ServiceInstanceUtils.getRPCServerLoader.getServiceInstances(serviceId.orNull)    if (instances.size() > 0) {      serviceId.map(ServiceInstance(_, instances.get(0))).orNull    } else if (serviceInstances.size > 0) {      serviceInstances(0)    } else {      logger.error(s"No valid instance for service : " + serviceId.orNull)      null    }  }
// before modificationobject HaContextGatewayRouter{  val CONTEXT_ID_STR:String = "contextId"  val CONTEXT_SERVICE_STR:String = "ps-cs"  @Deprecated  val OLD_CONTEXT_SERVICE_PREFIX = "contextservice"  val CONTEXT_REGEX: Regex = (normalPath(API_URL_PREFIX) + "rest_[a-zA-Z][a-zA-Z_0-9]*/(v\\d+)/contextservice/" + ".+").r}//after modificationobject HaContextGatewayRouter {
  val CONTEXT_ID_STR: String = "contextId"
  @deprecated("please use RPCConfiguration.CONTEXT_SERVICE_REQUEST_PREFIX")  val CONTEXT_SERVICE_REQUEST_PREFIX = RPCConfiguration.CONTEXT_SERVICE_REQUEST_PREFIX
  @deprecated("please use RPCConfiguration.CONTEXT_SERVICE_NAME")  val CONTEXT_SERVICE_NAME: String =    if (        RPCConfiguration.ENABLE_PUBLIC_SERVICE.getValue && RPCConfiguration.PUBLIC_SERVICE_LIST          .exists(_.equalsIgnoreCase(RPCConfiguration.CONTEXT_SERVICE_REQUEST_PREFIX))    ) {      RPCConfiguration.PUBLIC_SERVICE_APPLICATION_NAME.getValue    } else {      RPCConfiguration.CONTEXT_SERVICE_APPLICATION_NAME.getValue    }
  val CONTEXT_REGEX: Regex =    (normalPath(API_URL_PREFIX) + "rest_[a-zA-Z][a-zA-Z_0-9]*/(v\\d+)/contextservice/" + ".+").r
}

RPC Service Change（org.apache.linkis.rpc.conf.RPCConfiguration）#

//before modificationval BDP_RPC_BROADCAST_THREAD_SIZE: CommonVars[Integer] = CommonVars("wds.linkis.rpc.broadcast.thread.num", new Integer(25))//after modificationval BDP_RPC_BROADCAST_THREAD_SIZE: CommonVars[Integer] = CommonVars("wds.linkis.rpc.broadcast.thread.num", 25)
//before modificationval PUBLIC_SERVICE_LIST: Array[String] = CommonVars("wds.linkis.gateway.conf.publicservice.list", "query,jobhistory,application,configuration,filesystem,udf,variable,microservice,errorcode,bml,datasource").getValue .split(",") //after change val PUBLIC_SERVICE_LIST: Array[String] = CommonVars("wds.linkis.gateway.conf.publicservice.list", "cs,contextservice,data-source-manager,metadataquery,metadatamanager, query,jobhistory,application,configuration,filesystem,udf,variable,microservice,errorcode,bml,datasource").getValue.split(",")

Configuration file changes#

##Remove part #Delete the 
following configuration files linkis-dist/package/conf/linkis-ps-cs.properties linkis-dist/package/conf/linkis-ps-data-source-manager.propertieslinkis-dist/package/conf/linkis-ps-metadataquery.properties
##modified part
#modify linkis-dist/package/conf/linkis-ps-publicservice.properties#restful before modificationwds.linkis.server.restful.scan.packages=org.apache.linkis.jobhistory.restful,org.apache.linkis.variable.restful,org.apache.linkis.configuration.restful,org.apache.linkis.udf.api,org.apache.linkis.filesystem.restful,org.apache.linkis.filesystem.restful,org.apache.linkis.instance.label.restful,org.apache.linkis.metadata.restful.api,org.apache.linkis.cs.server.restful,org.apache.linkis.bml.restful,org.apache.linkis.errorcode.server.restful
#restful after modificationwds.linkis.server.restful.scan.packages=org.apache.linkis.cs.server.restful,org.apache.linkis.datasourcemanager.core.restful,org.apache.linkis.metadata.query.server.restful,org.apache.linkis.jobhistory.restful,org.apache.linkis.variable.restful,org.apache.linkis.configuration.restful,org.apache.linkis.udf.api,org.apache.linkis.filesystem.restful,org.apache.linkis.filesystem.restful,org.apache.linkis.instance.label.restful,org.apache.linkis.metadata.restful.api,org.apache.linkis.cs.server.restful,org.apache.linkis.bml.restful,org.apache.linkis.errorcode.server.restful
#mybatis before modificationwds.linkis.server.mybatis.mapperLocations=classpath:org/apache/linkis/jobhistory/dao/impl/*.xml,classpath:org/apache/linkis/variable/dao/impl/*.xml,classpath:org/apache/linkis/configuration/dao/impl/*.xml,classpath:org/apache/linkis/udf/dao/impl/*.xml,classpath:org/apache/linkis/instance/label/dao/impl/*.xml,classpath:org/apache/linkis/metadata/hive/dao/impl/*.xml,org/apache/linkis/metadata/dao/impl/*.xml,classpath:org/apache/linkis/bml/dao/impl/*.xml
wds.linkis.server.mybatis.typeAliasesPackage=org.apache.linkis.configuration.entity,org.apache.linkis.jobhistory.entity,org.apache.linkis.udf.entity,org.apache.linkis.variable.entity,org.apache.linkis.instance.label.entity,org.apache.linkis.manager.entity,org.apache.linkis.metadata.domain,org.apache.linkis.bml.entity
wds.linkis.server.mybatis.BasePackage=org.apache.linkis.jobhistory.dao,org.apache.linkis.variable.dao,org.apache.linkis.configuration.dao,org.apache.linkis.udf.dao,org.apache.linkis.instance.label.dao,org.apache.linkis.metadata.hive.dao,org.apache.linkis.metadata.dao,org.apache.linkis.bml.dao,org.apache.linkis.errorcode.server.dao,org.apache.linkis.publicservice.common.lock.dao
#mybatis after modificationwds.linkis.server.mybatis.mapperLocations=classpath*:org/apache/linkis/cs/persistence/dao/impl/*.xml,classpath:org/apache/linkis/datasourcemanager/core/dao/mapper/*.xml,classpath:org/apache/linkis/jobhistory/dao/impl/*.xml,classpath:org/apache/linkis/variable/dao/impl/*.xml,classpath:org/apache/linkis/configuration/dao/impl/*.xml,classpath:org/apache/linkis/udf/dao/impl/*.xml,classpath:org/apache/linkis/instance/label/dao/impl/*.xml,classpath:org/apache/linkis/metadata/hive/dao/impl/*.xml,org/apache/linkis/metadata/dao/impl/*.xml,classpath:org/apache/linkis/bml/dao/impl/*.xml
wds.linkis.server.mybatis.typeAliasesPackage=org.apache.linkis.cs.persistence.entity,org.apache.linkis.datasourcemanager.common.domain,org.apache.linkis.datasourcemanager.core.vo,org.apache.linkis.configuration.entity,org.apache.linkis.jobhistory.entity,org.apache.linkis.udf.entity,org.apache.linkis.variable.entity,org.apache.linkis.instance.label.entity,org.apache.linkis.manager.entity,org.apache.linkis.metadata.domain,org.apache.linkis.bml.entity
wds.linkis.server.mybatis.BasePackage=org.apache.linkis.cs.persistence.dao,org.apache.linkis.datasourcemanager.core.dao,org.apache.linkis.jobhistory.dao,org.apache.linkis. variable.dao,org.apache.linkis.configuration.dao,org.apache.linkis.udf.dao,org.apache.linkis.instance.label.dao,org.apache.linkis.metadata.hive.dao,org. apache.linkis.metadata.dao,org.apache.linkis.bml.dao,org.apache.linkis.errorcode.server.dao,org.apache.linkis.publicservice.common.lock.dao

Deployment script changes (linkis-dist/package/sbin/linkis-start-all.sh)#

startup script remove the following part 
#linkis-ps-cs SERVER_NAME="ps-cs" SERVER_IP=$CS_INSTALL_IP startApp 
if [ "$ENABLE_METADATA_QUERY" == "true" ]; then   #linkis-ps-data-source-manager  SERVER_NAME="ps-data-source-manager"  SERVER_IP=$DATASOURCE_MANAGER_INSTALL_IP  startApp
  #linkis-ps-metadataquery  SERVER_NAME="ps-metadataquery"  SERVER_IP=$METADATA_QUERY_INSTALL_IP  startAppfi
#linkis-ps-csSERVER_NAME="ps-cs"SERVER_IP=$CS_INSTALL_IPcheckServer
if [ "$ENABLE_METADATA_QUERY" == "true" ]; then  #linkis-ps-data-source-manager  SERVER_NAME="ps-data-source-manager"  SERVER_IP=$DATASOURCE_MANAGER_INSTALL_IP  checkServer
  #linkis-ps-metadataquery  SERVER_NAME="ps-metadataquery"  SERVER_IP=$METADATA_QUERY_INSTALL_IP  checkServerfi

#Service stop script remove the following part #linkis-ps-cs SERVER_NAME="ps-cs" SERVER_IP=$CS_INSTALL_IP stopApp 
if [ "$ENABLE_METADATA_QUERY" == "true" ]; then   #linkis-ps-data-source-manager   SERVER_NAME ="ps-data-source-manager"   SERVER_IP=$DATASOURCE_MANAGER_INSTALL_IP   stopApp 
  #linkis-ps-metadataquery   SERVER_NAME="ps-metadataquery"   SERVER_IP=$METADATA_QUERY_INSTALL_IP   stopApp fi

For more details on service merge changes, see: https://github .com/apache/incubator-linkis/pull/2927/files