| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with this |
| * work for additional information regarding copyright ownership. The ASF |
| * licenses this file to you 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.apache.knox.gateway.topology.discovery.ambari; |
| |
| import org.apache.knox.gateway.i18n.messages.MessagesFactory; |
| import org.apache.knox.gateway.topology.discovery.ServiceDiscovery; |
| |
| import java.io.File; |
| import java.io.InputStream; |
| import java.nio.file.Files; |
| import java.nio.file.Paths; |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Properties; |
| |
| class AmbariCluster implements ServiceDiscovery.Cluster { |
| |
| private static final AmbariServiceDiscoveryMessages log = MessagesFactory.get(AmbariServiceDiscoveryMessages.class); |
| |
| private static final String ZK_CONFIG_MAPPING_FILE = "ambari-service-discovery-zk-config-mapping.properties"; |
| |
| private static final String ZK_CONFIG_MAPPING_OVERRIDE_FILE = "ambari-discovery-zk-config.properties"; |
| |
| static final String ZK_CONFIG_MAPPING_SYSTEM_PROPERTY = |
| "org.apache.knox.gateway.topology.discovery.ambari.zk.mapping"; |
| |
| // Mapping of service roles to Hadoop service configurations and ZooKeeper property names |
| private static final Properties zooKeeperHAConfigMappings = new Properties(); |
| static { |
| try { |
| // Load all the default mappings |
| Properties defaults = new Properties(); |
| defaults.load(AmbariServiceDiscovery.class.getClassLoader().getResourceAsStream(ZK_CONFIG_MAPPING_FILE)); |
| for (String name : defaults.stringPropertyNames()) { |
| zooKeeperHAConfigMappings.setProperty(name, defaults.getProperty(name)); |
| } |
| |
| // Attempt to apply overriding or additional mappings from external source |
| String overridesPath = null; |
| |
| // First, check for the well-known overrides config file |
| String gatewayConfDir = System.getProperty(ServiceDiscovery.CONFIG_DIR_PROPERTY); |
| if (gatewayConfDir != null) { |
| File overridesFile = new File(gatewayConfDir, ZK_CONFIG_MAPPING_OVERRIDE_FILE); |
| if (overridesFile.exists()) { |
| overridesPath = overridesFile.getAbsolutePath(); |
| } |
| } |
| |
| // If no file in the config dir, check for the system property reference |
| if (overridesPath == null) { |
| overridesPath = System.getProperty(ZK_CONFIG_MAPPING_SYSTEM_PROPERTY); |
| } |
| |
| if (overridesPath != null) { |
| Properties overrides = new Properties(); |
| try (InputStream in = Files.newInputStream(Paths.get(overridesPath))) { |
| overrides.load(in); |
| for (String name : overrides.stringPropertyNames()) { |
| zooKeeperHAConfigMappings.setProperty(name, overrides.getProperty(name)); |
| } |
| } |
| } |
| } catch (Exception e) { |
| log.failedToLoadZooKeeperConfigurationMapping(e); |
| } |
| } |
| |
| private String name; |
| |
| private ServiceURLFactory urlFactory; |
| |
| private Map<String, Map<String, ServiceConfiguration>> serviceConfigurations = new HashMap<>(); |
| |
| private Map<String, AmbariComponent> components; |
| |
| |
| AmbariCluster(String name) { |
| this.name = name; |
| components = new HashMap<>(); |
| urlFactory = ServiceURLFactory.newInstance(this); |
| } |
| |
| void addServiceConfiguration(String serviceName, String configurationType, ServiceConfiguration serviceConfig) { |
| if (!serviceConfigurations.keySet().contains(serviceName)) { |
| serviceConfigurations.put(serviceName, new HashMap<>()); |
| } |
| serviceConfigurations.get(serviceName).put(configurationType, serviceConfig); |
| } |
| |
| |
| void addComponent(AmbariComponent component) { |
| components.put(component.getName(), component); |
| } |
| |
| |
| ServiceConfiguration getServiceConfiguration(String serviceName, String configurationType) { |
| ServiceConfiguration sc = null; |
| Map<String, ServiceConfiguration> configs = serviceConfigurations.get(serviceName); |
| if (configs != null) { |
| sc = configs.get(configurationType); |
| } |
| return sc; |
| } |
| |
| |
| Map<String, Map<String, ServiceConfiguration>> getServiceConfigurations() { |
| return serviceConfigurations; |
| } |
| |
| |
| Map<String, AmbariComponent> getComponents() { |
| return components; |
| } |
| |
| |
| AmbariComponent getComponent(String name) { |
| return components.get(name); |
| } |
| |
| |
| @Override |
| public String getName() { |
| return name; |
| } |
| |
| |
| @Override |
| public List<String> getServiceURLs(String serviceName) { |
| return getServiceURLs(serviceName, null); |
| } |
| |
| @Override |
| public List<String> getServiceURLs(String serviceName, Map<String, String> serviceParams) { |
| return new ArrayList<>(urlFactory.create(serviceName, serviceParams)); |
| } |
| |
| @Override |
| public ZooKeeperConfig getZooKeeperConfiguration(String serviceName) { |
| ZooKeeperConfig result = null; |
| |
| String config = zooKeeperHAConfigMappings.getProperty(serviceName + ".config"); |
| if (config != null) { |
| String[] parts = config.split(":"); |
| if (parts.length == 2) { |
| ServiceConfiguration sc = getServiceConfiguration(parts[0], parts[1]); |
| if (sc != null) { |
| String enabledProp = zooKeeperHAConfigMappings.getProperty(serviceName + ".enabled"); |
| String ensembleProp = zooKeeperHAConfigMappings.getProperty(serviceName + ".ensemble"); |
| String portProp = zooKeeperHAConfigMappings.getProperty(serviceName + ".port"); |
| String namespaceProp = zooKeeperHAConfigMappings.getProperty(serviceName + ".namespace"); |
| Map<String, String> scProps = sc.getProperties(); |
| if (scProps != null) { |
| |
| if (ensembleProp != null) { |
| // If there are multiple ensemble properties specified, then iteratively check for the first |
| // valid value, and use that one. |
| String[] ensembleProps = ensembleProp.split(","); |
| if (ensembleProps.length > 1) { |
| for (String prop : ensembleProps) { |
| if (!prop.isEmpty()) { |
| String value = scProps.get(prop); |
| if (value != null) { |
| ensembleProp = prop; |
| break; |
| } |
| } |
| } |
| } |
| } |
| |
| result = |
| new ZooKeeperConfiguration(enabledProp != null ? scProps.get(enabledProp) : null, |
| ensembleProp != null ? scProps.get(ensembleProp) : null, |
| portProp != null ? scProps.get(portProp) : null, |
| namespaceProp != null ? scProps.get(namespaceProp) : null); |
| } |
| } |
| } |
| } |
| |
| return result; |
| } |
| |
| |
| static class ServiceConfiguration { |
| |
| private String type; |
| private String version; |
| private Map<String, String> props; |
| |
| ServiceConfiguration(String type, String version, Map<String, String> properties) { |
| this.type = type; |
| this.version = version; |
| this.props = properties; |
| } |
| |
| public String getVersion() { |
| return version; |
| } |
| |
| public String getType() { |
| return type; |
| } |
| |
| public Map<String, String> getProperties() { |
| return props; |
| } |
| } |
| |
| |
| static class ZooKeeperConfiguration implements ServiceDiscovery.Cluster.ZooKeeperConfig { |
| boolean isEnabled; |
| String ensemble; |
| String namespace; |
| |
| ZooKeeperConfiguration(String enabled, String ensemble, String port, String namespace) { |
| this.namespace = namespace; |
| this.ensemble = (port == null) ? ensemble : applyPortToEnsemble(ensemble, port); |
| this.isEnabled = (enabled != null ? Boolean.valueOf(enabled) : true); |
| } |
| |
| @Override |
| public boolean isEnabled() { |
| return isEnabled; |
| } |
| |
| @Override |
| public String getEnsemble() { |
| return ensemble; |
| } |
| |
| @Override |
| public String getNamespace() { |
| return namespace; |
| } |
| |
| private String applyPortToEnsemble(String ensemble, String port) { |
| StringBuilder updatedEnsemble = new StringBuilder(); |
| |
| String[] hosts = ensemble.split(","); |
| int index = 0; |
| for (String host : hosts) { |
| int portIndex = host.indexOf(':'); |
| String qualifiedHost = (portIndex > 0) ? host.substring(0, portIndex) : host; |
| updatedEnsemble.append(qualifiedHost).append(':').append(port); |
| index += 1; |
| if (index < hosts.length) { |
| updatedEnsemble.append(','); |
| } |
| } |
| |
| return updatedEnsemble.toString(); |
| } |
| } |
| } |