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Refactor pod template logic to make it easier to test (apache#17178)
* Refactoring of pod template logic * fix javadoc * Fix intellij * remove unneeded throw * PR comments * fix style * Fix unit tests
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123 changes: 123 additions & 0 deletions
123
...main/java/org/apache/druid/k8s/overlord/taskadapter/DynamicConfigPodTemplateSelector.java
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| /* | ||
| * 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. | ||
| */ | ||
|
|
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| package org.apache.druid.k8s.overlord.taskadapter; | ||
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| import com.google.common.base.Optional; | ||
| import com.google.common.base.Supplier; | ||
| import io.fabric8.kubernetes.api.model.PodTemplate; | ||
| import io.fabric8.kubernetes.client.utils.Serialization; | ||
| import org.apache.druid.guice.IndexingServiceModuleHelper; | ||
| import org.apache.druid.indexing.common.task.Task; | ||
| import org.apache.druid.java.util.common.IAE; | ||
| import org.apache.druid.k8s.overlord.execution.KubernetesTaskRunnerDynamicConfig; | ||
| import org.apache.druid.k8s.overlord.execution.PodTemplateSelectStrategy; | ||
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| import java.io.File; | ||
| import java.nio.file.Files; | ||
| import java.util.HashMap; | ||
| import java.util.HashSet; | ||
| import java.util.Properties; | ||
| import java.util.Set; | ||
|
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| public class DynamicConfigPodTemplateSelector implements PodTemplateSelector | ||
| { | ||
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| private static final String TASK_PROPERTY = IndexingServiceModuleHelper.INDEXER_RUNNER_PROPERTY_PREFIX | ||
| + ".k8s.podTemplate."; | ||
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| private final Properties properties; | ||
| private HashMap<String, PodTemplate> podTemplates; | ||
| private Supplier<KubernetesTaskRunnerDynamicConfig> dynamicConfigRef; | ||
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| public DynamicConfigPodTemplateSelector( | ||
| Properties properties, | ||
| Supplier<KubernetesTaskRunnerDynamicConfig> dynamicConfigRef | ||
| ) | ||
| { | ||
| this.properties = properties; | ||
| this.dynamicConfigRef = dynamicConfigRef; | ||
| initializeTemplatesFromFileSystem(); | ||
| } | ||
|
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| private void initializeTemplatesFromFileSystem() | ||
| { | ||
| Set<String> taskAdapterTemplateKeys = getTaskAdapterTemplates(properties); | ||
| if (!taskAdapterTemplateKeys.contains("base")) { | ||
| throw new IAE( | ||
| "Pod template task adapter requires a base pod template to be specified under druid.indexer.runner.k8s.podTemplate.base"); | ||
| } | ||
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| HashMap<String, PodTemplate> podTemplateMap = new HashMap<>(); | ||
| for (String taskAdapterTemplateKey : taskAdapterTemplateKeys) { | ||
| Optional<PodTemplate> template = loadPodTemplate(taskAdapterTemplateKey, properties); | ||
| if (template.isPresent()) { | ||
| podTemplateMap.put(taskAdapterTemplateKey, template.get()); | ||
| } | ||
| } | ||
| podTemplates = podTemplateMap; | ||
| } | ||
|
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| private Set<String> getTaskAdapterTemplates(Properties properties) | ||
| { | ||
| Set<String> taskAdapterTemplates = new HashSet<>(); | ||
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| for (String runtimeProperty : properties.stringPropertyNames()) { | ||
| if (runtimeProperty.startsWith(TASK_PROPERTY)) { | ||
| String[] taskAdapterPropertyPaths = runtimeProperty.split("\\."); | ||
| taskAdapterTemplates.add(taskAdapterPropertyPaths[taskAdapterPropertyPaths.length - 1]); | ||
| } | ||
| } | ||
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| return taskAdapterTemplates; | ||
| } | ||
|
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| private Optional<PodTemplate> loadPodTemplate(String key, Properties properties) | ||
| { | ||
| String property = TASK_PROPERTY + key; | ||
| String podTemplateFile = properties.getProperty(property); | ||
| if (podTemplateFile == null) { | ||
| throw new IAE("Pod template file not specified for [%s]", property); | ||
|
|
||
| } | ||
| try { | ||
| return Optional.of(Serialization.unmarshal( | ||
| Files.newInputStream(new File(podTemplateFile).toPath()), | ||
| PodTemplate.class | ||
| )); | ||
| } | ||
| catch (Exception e) { | ||
| throw new IAE(e, "Failed to load pod template file for [%s] at [%s]", property, podTemplateFile); | ||
| } | ||
| } | ||
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| @Override | ||
| public Optional<PodTemplateWithName> getPodTemplateForTask(Task task) | ||
| { | ||
| PodTemplateSelectStrategy podTemplateSelectStrategy; | ||
| KubernetesTaskRunnerDynamicConfig dynamicConfig = dynamicConfigRef.get(); | ||
| if (dynamicConfig == null || dynamicConfig.getPodTemplateSelectStrategy() == null) { | ||
| podTemplateSelectStrategy = KubernetesTaskRunnerDynamicConfig.DEFAULT_STRATEGY; | ||
| } else { | ||
| podTemplateSelectStrategy = dynamicConfig.getPodTemplateSelectStrategy(); | ||
| } | ||
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| return Optional.of(podTemplateSelectStrategy.getPodTemplateForTask(task, podTemplates)); | ||
| } | ||
| } |
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