/**
* Copyright 2005-2014 Red Hat, Inc.
*
* Red Hat 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 io.fabric8.service.ssh;
import io.fabric8.api.AutoScaleRequest;
import io.fabric8.api.Container;
import io.fabric8.api.ContainerAutoScaler;
import io.fabric8.api.Containers;
import io.fabric8.api.FabricRequirements;
import io.fabric8.api.FabricService;
import io.fabric8.api.HostConfiguration;
import io.fabric8.api.NameValidator;
import io.fabric8.api.ProfileRequirements;
import io.fabric8.api.SshHostConfiguration;
import io.fabric8.api.SshScalingRequirements;
import io.fabric8.internal.autoscale.AutoScalers;
import io.fabric8.internal.autoscale.HostProfileCounter;
import io.fabric8.internal.autoscale.LoadSortedHostConfiguration;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.List;
import java.util.SortedSet;
/**
*/
public class SshAutoScaler implements ContainerAutoScaler {
private static final transient Logger LOG = LoggerFactory.getLogger(SshAutoScaler.class);
private final SshContainerProvider containerProvider;
public SshAutoScaler(SshContainerProvider containerProvider) {
this.containerProvider = containerProvider;
}
@Override
public int getWeight() {
return 50;
}
@Override
public void createContainers(AutoScaleRequest request) throws Exception {
int count = request.getDelta();
String profile = request.getProfile();
String version = request.getVersion();
FabricService fabricService = request.getFabricService();
Container[] containers = fabricService.getContainers();
FabricRequirements requirements = request.getFabricRequirements();
List<? extends HostConfiguration> hostConfigurations = requirements.getSshHosts();
HostProfileCounter hostProfileCounter = new HostProfileCounter();
AutoScalers.createHostToProfileScaleMap(hostProfileCounter, hostConfigurations, containers);
for (int i = 0; i < count; i++) {
CreateSshContainerOptions.Builder builder = null;
NameValidator nameValidator = Containers.createNameValidator(containers);
String name = Containers.createContainerName(containers, profile, containerProvider.getScheme(), nameValidator);
if (fabricService != null) {
builder = createAutoScaleOptions(request, fabricService, hostProfileCounter);
}
if (builder != null) {
final CreateSshContainerOptions.Builder configuredBuilder = builder.number(1).version(version).profiles(profile);
CreateSshContainerOptions options = configuredBuilder.name(name).build();
LOG.info("Creating container name " + name + " version " + version + " profile " + profile + " " + count + " container(s)");
fabricService.createContainers(options);
}
}
}
protected CreateSshContainerOptions.Builder createAutoScaleOptions(AutoScaleRequest request, FabricService fabricService, HostProfileCounter hostProfileCounter) {
CreateSshContainerOptions.Builder builder = chooseHostContainerOptions(request, hostProfileCounter);
if (builder == null) return null;
String zookeeperUrl = fabricService.getZookeeperUrl();
String zookeeperPassword = fabricService.getZookeeperPassword();
if (builder.getProxyUri() == null) {
builder.proxyUri(fabricService.getMavenRepoURI());
}
return builder.zookeeperUrl(zookeeperUrl).zookeeperPassword(zookeeperPassword);
}
/**
* This method is public for easier testing
*/
public static CreateSshContainerOptions.Builder chooseHostContainerOptions(AutoScaleRequest request, HostProfileCounter hostProfileCounter) {
CreateSshContainerOptions.Builder builder = CreateSshContainerOptions.builder();
FabricRequirements requirements = request.getFabricRequirements();
ProfileRequirements profileRequirements = request.getProfileRequirements();
SshScalingRequirements sshScalingRequirements = profileRequirements.getSshScalingRequirements();
List<SshHostConfiguration> hosts = requirements.getSshHosts();
SortedSet<LoadSortedHostConfiguration<SshHostConfiguration>> sortedHostConfigurations = AutoScalers.filterHosts(profileRequirements, sshScalingRequirements, hostProfileCounter, hosts);
SshHostConfiguration sshHostConfig = null;
if (!sortedHostConfigurations.isEmpty()) {
LoadSortedHostConfiguration<SshHostConfiguration> first = sortedHostConfigurations.first();
sshHostConfig = first.getConfiguration();
}
if (sshHostConfig == null) {
LOG.warn("Could not create version " + request.getVersion() + " profile " + request.getProfile() + " as no matching hosts could be found for " + sshScalingRequirements);
request.getProfileAutoScaleStatus().noSuitableHost("" + sshScalingRequirements);
return null;
}
builder.configure(sshHostConfig, requirements, profileRequirements);
return builder;
}
@Override
public void destroyContainers(String profile, int count, List<Container> containers) {
// TODO
}
}