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/*
* Copyright © 2018-2019 AT&T Intellectual Property.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.onap.ccsdk.cds.blueprintsprocessor
import kotlinx.coroutines.GlobalScope
import kotlinx.coroutines.launch
import org.onap.ccsdk.cds.blueprintsprocessor.core.service.BluePrintClusterService
import org.onap.ccsdk.cds.blueprintsprocessor.core.service.ClusterInfo
import org.onap.ccsdk.cds.controllerblueprints.core.BluePrintConstants
import org.onap.ccsdk.cds.controllerblueprints.core.logger
import org.onap.ccsdk.cds.controllerblueprints.core.utils.ClusterUtils
import org.springframework.boot.context.event.ApplicationReadyEvent
import org.springframework.context.event.EventListener
import org.springframework.stereotype.Component
import java.util.Properties
/**
* To Start the cluster, minimum 2 Instances/ Replicas od CDS needed.
* All instance such as Blueprintprocessor, ResourceResolution, MessagePrioritization should be in
* same cluster and should have same cluster name.
*
* Data can be shared only between the clusters, outside the cluster data can't be shared.
* If cds-controller-x instance wants to share data with resource-resolution-x instance, then it should be in the
* same cluster.(cds-cluster) and same network (cds-network)
*
* Assumptions:
* 1. Container, Pod and Host names are same.
* 2. Container names should end with sequence number.
* Blueprintprocessor example be : cds-controller-1, cds-controller-2, cds-controller-3
* ResourceResolution example be : resource-resolution-1, resource-resolution-2, resource-resolution-3
* 3. Each contained, should have environment properties CLUSTER_ID, CLUSTER_NODE_ID, CLUSTER_JOIN_AS_CLIENT,
* CLUSTER_CONFIG_FILE
* Example values :
* CLUSTER_ID: cds-cluster
* CLUSTER_NODE_ID: cds-controller-2
* CLUSTER_JOIN_AS_CLIENT: "true" or "false"
* CLUSTER_CONFIG_FILE: <Config location>
* 4. Cluster will be enabled only all the above properties present in the environments.
* if CLUSTER_ENABLED is present, then it will try to create cluster.
*/
@Component
open class BluePrintProcessorCluster(private val bluePrintClusterService: BluePrintClusterService) {
private val log = logger(BluePrintProcessorCluster::class)
@EventListener(ApplicationReadyEvent::class)
fun startAndJoinCluster() = GlobalScope.launch {
if (BluePrintConstants.CLUSTER_ENABLED) {
val clusterId = ClusterUtils.clusterId()
val nodeId = ClusterUtils.clusterNodeId()
val joinAsClient =
(System.getenv(BluePrintConstants.PROPERTY_CLUSTER_JOIN_AS_CLIENT) ?: "false").toBoolean()
val clusterConfigFile = System.getenv(BluePrintConstants.PROPERTY_CLUSTER_CONFIG_FILE)
val properties = Properties()
properties["hazelcast.logging.type"] = "slf4j"
val clusterInfo = ClusterInfo(
id = clusterId, nodeId = nodeId,
joinAsClient = joinAsClient,
configFile = clusterConfigFile,
properties = properties
)
bluePrintClusterService.startCluster(clusterInfo)
} else {
log.info("Cluster is disabled, to enable cluster set the environment CLUSTER_* properties.")
}
}
}
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