io.fabric8.kubernetes.client.dsl.internal.ReplicationControllerOperationsImpl Maven / Gradle / Ivy

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/**
 * Copyright (C) 2015 Red Hat, 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.fabric8.kubernetes.client.dsl.internal;

import com.squareup.okhttp.OkHttpClient;
import io.fabric8.kubernetes.api.builder.Visitor;
import io.fabric8.kubernetes.api.model.Container;
import io.fabric8.kubernetes.api.model.ContainerBuilder;
import io.fabric8.kubernetes.api.model.DoneableReplicationController;
import io.fabric8.kubernetes.api.model.ReplicationController;
import io.fabric8.kubernetes.api.model.ReplicationControllerBuilder;
import io.fabric8.kubernetes.api.model.ReplicationControllerList;
import io.fabric8.kubernetes.client.Config;
import io.fabric8.kubernetes.client.KubernetesClientException;
import io.fabric8.kubernetes.client.Watch;
import io.fabric8.kubernetes.client.Watcher;
import io.fabric8.kubernetes.client.dsl.ClientNonNamespaceOperation;
import io.fabric8.kubernetes.client.dsl.ClientRollableScallableResource;
import io.fabric8.kubernetes.client.dsl.EditReplaceDeletable;
import io.fabric8.kubernetes.client.dsl.ImageEditReplaceable;
import io.fabric8.kubernetes.client.dsl.Reaper;
import io.fabric8.kubernetes.client.dsl.TimeoutImageEditReplaceable;
import io.fabric8.kubernetes.client.dsl.Watchable;
import io.fabric8.kubernetes.client.dsl.base.HasMetadataOperation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.InputStream;
import java.lang.reflect.InvocationTargetException;
import java.util.Collections;
import java.util.Map;
import java.util.Objects;
import java.util.TreeMap;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicReference;

public class ReplicationControllerOperationsImpl extends HasMetadataOperation>
  implements ClientRollableScallableResource,
  TimeoutImageEditReplaceable {

  static final transient Logger LOG = LoggerFactory.getLogger(ReplicationControllerOperationsImpl.class);

  private final Boolean rolling;
  private final long rollingTimeout;
  private final TimeUnit rollingTimeUnit;

  public ReplicationControllerOperationsImpl(OkHttpClient client, Config config, String namespace) {
    this(client, config, null, namespace, null, true, null, null, false, -1, new TreeMap(), new TreeMap(), new TreeMap(), new TreeMap(), new TreeMap(), false, config.getRollingTimeout(), TimeUnit.MILLISECONDS);
  }

  public ReplicationControllerOperationsImpl(OkHttpClient client, Config config, String apiVersion, String namespace, String name, Boolean cascading, ReplicationController item, String resourceVersion, Boolean reloadingFromServer, long gracePeriodSeconds, Map labels, Map labelsNot, Map labelsIn, Map labelsNotIn, Map fields) {
    this(client, config, apiVersion, namespace, name, cascading, item, resourceVersion, reloadingFromServer, gracePeriodSeconds, labels, labelsNot, labelsIn, labelsNotIn, fields, false, config.getRollingTimeout(), TimeUnit.MILLISECONDS);
  }

  public ReplicationControllerOperationsImpl(OkHttpClient client, Config config, String apiVersion, String namespace, String name, Boolean cascading, ReplicationController item, String resourceVersion, Boolean reloadingFromServer, long gracePeriodSeconds, Map labels, Map labelsNot, Map labelsIn, Map labelsNotIn, Map fields, Boolean rolling, long rollingTimeout, TimeUnit rollingTimeUnit) {
    super(client, config, null, apiVersion, "replicationcontrollers", namespace, name, cascading, item, resourceVersion, reloadingFromServer, gracePeriodSeconds, labels, labelsNot, labelsIn, labelsNotIn, fields);
    this.rolling = rolling;
    this.rollingTimeout = rollingTimeout;
    this.rollingTimeUnit = rollingTimeUnit;
    reaper = new ReplicationControllerReaper(this);
  }

  @Override
  public ClientRollableScallableResource load(InputStream is) {
    try {
      ReplicationController item = unmarshal(is, ReplicationController.class);
      return new ReplicationControllerOperationsImpl(client, getConfig(), getAPIVersion(), getNamespace(), getName(), isCascading(), item, getResourceVersion(), isReloadingFromServer(), getGracePeriodSeconds(), getLabels(), getLabelsNot(), getLabelsIn(), getLabelsNotIn(), getFields(), rolling, rollingTimeout, rollingTimeUnit);
    } catch (Throwable t) {
      throw KubernetesClientException.launderThrowable(t);
    }
  }

  @Override
  public ClientNonNamespaceOperation> inNamespace(String namespace) {
    return new ReplicationControllerOperationsImpl(client, getConfig(), getAPIVersion(), namespace, getName(), isCascading(), getItem(), getResourceVersion(), isReloadingFromServer(), getGracePeriodSeconds(), getLabels(), getLabelsNot(), getLabelsIn(), getLabelsNotIn(), getFields(), rolling, rollingTimeout, rollingTimeUnit);
  }


  @Override
  public ImageEditReplaceable withTimeout(long timeout, TimeUnit unit) {
    return new ReplicationControllerOperationsImpl(client, getConfig(), getAPIVersion(), namespace, getName(), isCascading(), getItem(), getResourceVersion(), isReloadingFromServer(), getGracePeriodSeconds(), getLabels(), getLabelsNot(), getLabelsIn(), getLabelsNotIn(), getFields(), rolling, timeout, unit);
  }

  @Override
  public ImageEditReplaceable withTimeoutInMillis(long timeoutInMillis) {
    return new ReplicationControllerOperationsImpl(client, getConfig(), getAPIVersion(), namespace, getName(), isCascading(), getItem(), getResourceVersion(), isReloadingFromServer(), getGracePeriodSeconds(), getLabels(), getLabelsNot(), getLabelsIn(), getLabelsNotIn(), getFields(), rolling, timeoutInMillis, TimeUnit.MILLISECONDS);
  }

  @Override
  public ReplicationController scale(int count) {
    return scale(count, false);
  }

  @Override
  public ClientRollableScallableResource withName(String name) {
    if (name == null || name.length() == 0) {
      throw new IllegalArgumentException("Name must be provided.");
    }
    return new ReplicationControllerOperationsImpl(client, getConfig(), getAPIVersion(), getNamespace(), name, isCascading(), getItem(), getResourceVersion(), isReloadingFromServer(), getGracePeriodSeconds(), getLabels(), getLabelsNot(), getLabelsIn(), getLabelsNotIn(), getFields(), rolling, rollingTimeout, rollingTimeUnit);
  }

  @Override
  public ClientRollableScallableResource fromServer() {
    return new ReplicationControllerOperationsImpl(client, getConfig(), getAPIVersion(), getNamespace(), getName(), isCascading(), getItem(), getResourceVersion(), true, getGracePeriodSeconds(), getLabels(), getLabelsNot(), getLabelsIn(), getLabelsNotIn(), getFields(), rolling, rollingTimeout, rollingTimeUnit);
  }

  @Override
  public Watchable> withResourceVersion(String resourceVersion) {
    return new ReplicationControllerOperationsImpl(client, getConfig(), getAPIVersion(), getNamespace(), getName(), isCascading(), getItem(), resourceVersion, isReloadingFromServer(), getGracePeriodSeconds(), getLabels(), getLabelsNot(), getLabelsIn(), getLabelsNotIn(), getFields(), rolling, rollingTimeout, rollingTimeUnit);
  }

  @Override
  public EditReplaceDeletable cascading(boolean enabled) {
    return new ReplicationControllerOperationsImpl(client, getConfig(), getAPIVersion(), getNamespace(), getName(), enabled, getItem(), getResourceVersion(), isReloadingFromServer(), getGracePeriodSeconds(), getLabels(), getLabelsNot(), getLabelsIn(), getLabelsNotIn(), getFields(), rolling, rollingTimeout, rollingTimeUnit);
  }

  @Override
  public ReplicationController scale(int count, boolean wait) {
    ReplicationController res = cascading(false).edit().editSpec().withReplicas(count).endSpec().done();
    if (wait) {
      waitUntilRCIsScaled();
      res = getMandatory();
    }
    return res;
  }

  /**
   * Lets wait until there are enough Ready pods of the given RC
   */
  private void waitUntilRCIsScaled() {
    final CountDownLatch countDownLatch = new CountDownLatch(1);

    final AtomicReference atomicRC = new AtomicReference<>();

    final Runnable rcPoller = new Runnable() {
      public void run() {
        ReplicationController rc = getMandatory();
        atomicRC.set(rc);
        if (Objects.equals(rc.getSpec().getReplicas(), rc.getStatus().getReplicas())) {
          countDownLatch.countDown();
        } else {
          LOG.debug("Only {}/{} replicas scheduled for ReplicationController: {} in namespace: {} seconds so waiting...",
              rc.getStatus().getReplicas(), rc.getSpec().getReplicas(), rc.getMetadata().getName(), namespace);
        }
      }
    };

    ScheduledExecutorService executor = Executors.newSingleThreadScheduledExecutor();
    ScheduledFuture poller = executor.scheduleWithFixedDelay(rcPoller, 0, POLL_INTERVAL_MS, TimeUnit.MILLISECONDS);
    try {
      countDownLatch.await(rollingTimeout, rollingTimeUnit);
      executor.shutdown();
    } catch (InterruptedException e) {
      poller.cancel(true);
      executor.shutdown();
      LOG.error("Only {}/{} pod(s) ready for ReplicationController: {} in namespace: {}  after waiting for {} seconds so giving up",
          atomicRC.get().getStatus().getReplicas(), atomicRC.get().getSpec().getReplicas(), atomicRC.get().getMetadata().getName(), namespace, rollingTimeUnit.toSeconds(rollingTimeout));
    }
  }

  @Override
  public ReplicationControllerOperationsImpl rolling() {
    return new ReplicationControllerOperationsImpl(client, getConfig(), getAPIVersion(), getNamespace(), getName(), isCascading(), getItem(), getResourceVersion(), isReloadingFromServer(), getGracePeriodSeconds(), getLabels(), getLabelsNot(), getLabelsIn(), getLabelsNotIn(), getFields(), true, rollingTimeout, rollingTimeUnit);
  }

  @Override
  public ReplicationController updateImage(String image) {
    ReplicationController oldRC = get();

    if (oldRC == null) {
      throw new KubernetesClientException("Existing replication controller doesn't exist");
    }
    if (oldRC.getSpec().getTemplate().getSpec().getContainers().size() > 1) {
      throw new KubernetesClientException("Image update is not supported for multicontainer pods");
    }
    if (oldRC.getSpec().getTemplate().getSpec().getContainers().size() == 0) {
      throw new KubernetesClientException("Pod has no containers!");
    }

    Container updatedContainer = new ContainerBuilder(oldRC.getSpec().getTemplate().getSpec().getContainers().iterator().next()).withImage(image).build();

    ReplicationControllerBuilder newRCBuilder = new ReplicationControllerBuilder(oldRC);
    newRCBuilder.editMetadata().withResourceVersion(null).endMetadata()
      .editSpec().editTemplate().editSpec().withContainers(Collections.singletonList(updatedContainer))
      .endSpec().endTemplate().endSpec();

    return new ReplicationControllerRollingUpdater(client, config, namespace).rollUpdate(oldRC, newRCBuilder.build());
  }

  @Override
  public DoneableReplicationController edit() {
    if (!rolling) {
      return super.edit();
    }

    final Visitor visitor = new Visitor() {
      @Override
      public void visit(ReplicationController rc) {
        try {
          new ReplicationControllerRollingUpdater(client, config, namespace).rollUpdate(getMandatory(), rc);
        } catch (Exception e) {
          throw KubernetesClientException.launderThrowable(e);
        }
      }
    };

    try {
      return getDoneableType().getDeclaredConstructor(getType(), Visitor.class).newInstance(get(), visitor);
    } catch (InvocationTargetException | NoSuchMethodException | IllegalAccessException | InstantiationException e) {
      throw KubernetesClientException.launderThrowable(e);
    }
  }

  @Override
  public ReplicationController replace(ReplicationController rc) {
    if (!rolling) {
      return super.replace(rc);
    }
    return new ReplicationControllerRollingUpdater(client, config, namespace, rollingTimeUnit.toMillis(rollingTimeout), getConfig().getLoggingInterval()).rollUpdate(getMandatory(), rc);
  }

  private static class ReplicationControllerReaper implements Reaper {
    private ReplicationControllerOperationsImpl oper;

    public ReplicationControllerReaper(ReplicationControllerOperationsImpl oper) {
      this.oper = oper;
    }

    @Override
    public void reap() {
      oper.scale(0, true);
    }
  }
}