io.hyscale.deployer.services.util.KubernetesResourceUtil Maven / Gradle / Ivy
/**
* Copyright 2019 Pramati Prism, Inc.
*
* 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 io.hyscale.deployer.services.util;
import java.io.FileReader;
import java.io.IOException;
import java.io.Reader;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Map;
import io.hyscale.commons.models.KubernetesResource;
import io.hyscale.commons.models.Manifest;
import io.hyscale.commons.models.YAMLManifest;
import io.hyscale.deployer.services.model.CustomObject;
import io.kubernetes.client.openapi.models.V1ObjectMeta;
import io.kubernetes.client.util.Yaml;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.yaml.snakeyaml.constructor.ConstructorException;
/**
* Utility for generic kubernetes resource
*
*/
public class KubernetesResourceUtil {
private static final String GET_KIND = "getKind";
private static final String GET_METADATA = "getMetadata";
private static final Logger logger = LoggerFactory.getLogger(KubernetesResourceUtil.class);
private KubernetesResourceUtil() {}
public static KubernetesResource getKubernetesResource(Manifest manifest, String namespace)
throws NoSuchMethodException, IllegalAccessException,
InvocationTargetException {
if (manifest == null) {
return null;
}
KubernetesResource resource = new KubernetesResource();
YAMLManifest yamlManifest = (YAMLManifest) manifest;
Object obj = null;
try{
obj = Yaml.load(yamlManifest.getManifest());
}catch (ConstructorException | IOException e){
logger.error("Failed to load manifest returning null");
return null;
}
Method kindMethod = obj.getClass().getMethod(GET_KIND);
String kind = (String) kindMethod.invoke(obj);
V1ObjectMeta v1ObjectMeta = getObjectMeta(obj);
if (v1ObjectMeta != null) {
v1ObjectMeta.setNamespace(namespace);
}
resource.setV1ObjectMeta(v1ObjectMeta);
resource.setKind(kind);
resource.setResource(obj);
return resource;
}
public static CustomObject getK8sCustomObjectResource(Manifest manifest, String namespace)
throws IOException {
if (manifest == null) {
return null;
}
YAMLManifest yamlManifest = (YAMLManifest) manifest;
Map data = (Map) Yaml.getSnakeYaml().load((Reader)(new FileReader(yamlManifest.getManifest())));
CustomObject customObject = new CustomObject();
customObject.putAll(data);
Map metaMap = (Map) customObject.get("metadata");
if(metaMap.get("namespace")==null && namespace!=null){
// Adding namespace in metadata if not provided
metaMap.put("namespace",namespace);
}
return customObject;
}
public static V1ObjectMeta getObjectMeta(Object object)
throws NoSuchMethodException, IllegalAccessException, InvocationTargetException {
if (object == null) {
return null;
}
Method metadataMethod = object.getClass().getMethod(GET_METADATA);
return (V1ObjectMeta) metadataMethod.invoke(object);
}
}