Java tutorial
/* * 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. */ import com.google.common.base.Optional; import org.jclouds.ContextBuilder; import org.jclouds.net.domain.IpProtocol; import org.jclouds.openstack.nova.v2_0.NovaApi; import org.jclouds.openstack.nova.v2_0.domain.*; import org.jclouds.openstack.nova.v2_0.extensions.FloatingIPApi; import org.jclouds.openstack.nova.v2_0.extensions.KeyPairApi; import org.jclouds.openstack.nova.v2_0.extensions.SecurityGroupApi; import org.jclouds.openstack.nova.v2_0.features.FlavorApi; import org.jclouds.openstack.nova.v2_0.features.ImageApi; import org.jclouds.openstack.nova.v2_0.features.ServerApi; import org.jclouds.openstack.nova.v2_0.options.CreateServerOptions; import org.jclouds.openstack.nova.v2_0.predicates.ServerPredicates; import java.io.IOException; import java.nio.file.Files; import java.nio.file.Paths; import java.nio.file.attribute.PosixFilePermission; import java.util.HashSet; import java.util.List; import java.util.Set; import java.util.concurrent.TimeUnit; import java.util.stream.Collectors; import static java.lang.System.out; class GettingStarted { public static void main(String[] args) throws IOException { out.println("============================="); // # step-1 String provider = "openstack-nova"; String identity = "your_project_name_or_id:your_auth_username"; // NB: Do not check this file into source control with a real password in it! String credential = "your_auth_password"; String authUrl = "http://controller:5000/v2.0/"; NovaApi conn = ContextBuilder.newBuilder(provider).endpoint(authUrl).credentials(identity, credential) .buildApi(NovaApi.class); String region = conn.getConfiguredRegions().iterator().next(); out.println("Running in region: " + region); // # step-2 ImageApi imageApi = conn.getImageApi(region); out.println("Images in region:"); imageApi.list().concat().forEach(image -> out.println(" " + image.getName())); // # step-3 FlavorApi flavorApi = conn.getFlavorApi(region); out.println("Flavors in region:"); flavorApi.list().concat().forEach(flavor -> out.println(" " + flavor.getName())); // # step-4 String imageId = "778e7b2e-4e67-44eb-9565-9c920e236dfd"; Image retrievedImage = conn.getImageApi(region).get(imageId); out.println(retrievedImage.toString()); // # step-5 String flavorId = "639b8b2a-a5a6-4aa2-8592-ca765ee7af63"; Flavor flavor = conn.getFlavorApi(region).get(flavorId); out.println(flavor.toString()); // # step-6 String testingInstance = "testingInstance"; ServerCreated testInstance = conn.getServerApi(region).create(testingInstance, imageId, flavorId); out.println("Server created. ID: " + testInstance.getId()); // # step-7 ServerApi serverApi = conn.getServerApi(region); out.println("Instances in region:"); serverApi.list().concat().forEach(instance -> out.println(" " + instance)); // # step-8 if (serverApi.delete(testInstance.getId())) { out.println("Server " + testInstance.getId() + " being deleted, please wait."); ServerPredicates.awaitStatus(serverApi, Server.Status.DELETED, 600, 5).apply(testInstance.getId()); serverApi.list().concat().forEach(instance -> out.println(" " + instance)); } else { out.println("Server not deleted."); } // # step-9 String pub_key_file = "id_rsa"; String privateKeyFile = "~/.ssh/" + pub_key_file; Optional<? extends KeyPairApi> keyPairApiExtension = conn.getKeyPairApi(region); if (keyPairApiExtension.isPresent()) { out.println("Checking for existing SSH keypair..."); KeyPairApi keyPairApi = keyPairApiExtension.get(); boolean keyPairFound = keyPairApi.get(pub_key_file) != null; if (keyPairFound) { out.println("Keypair " + pub_key_file + " already exists."); } else { out.println("Creating keypair."); KeyPair keyPair = keyPairApi.create(pub_key_file); try { Files.write(Paths.get(privateKeyFile), keyPair.getPrivateKey().getBytes()); out.println("Wrote " + privateKeyFile + "."); // set file permissions to 600 Set<PosixFilePermission> permissions = new HashSet<>(); permissions.add(PosixFilePermission.OWNER_READ); permissions.add(PosixFilePermission.OWNER_WRITE); Files.setPosixFilePermissions(Paths.get(privateKeyFile), permissions); } catch (IOException e) { e.printStackTrace(); } } out.println("Existing keypairs:"); keyPairApi.list().forEach(keyPair -> out.println(" " + keyPair)); } else { out.println("No keypair extension present; skipping keypair checks."); } // # step-10 String securityGroupName = "all-in-one"; Optional<? extends SecurityGroupApi> securityGroupApiExtension = conn.getSecurityGroupApi(region); if (securityGroupApiExtension.isPresent()) { out.println("Checking security groups."); SecurityGroupApi securityGroupApi = securityGroupApiExtension.get(); boolean securityGroupFound = false; for (SecurityGroup securityGroup : securityGroupApi.list()) { securityGroupFound = securityGroupFound || securityGroup.getName().equals(securityGroupName); } if (securityGroupFound) { out.println("Security group " + securityGroupName + " already exists."); } else { out.println("Creating " + securityGroupName + "..."); SecurityGroup securityGroup = securityGroupApi.createWithDescription(securityGroupName, securityGroupName + " network access for all-in-one application."); Ingress sshIngress = Ingress.builder().fromPort(22).ipProtocol(IpProtocol.TCP).toPort(22).build(); Ingress webIngress = Ingress.builder().fromPort(80).ipProtocol(IpProtocol.TCP).toPort(80).build(); securityGroupApi.createRuleAllowingCidrBlock(securityGroup.getId(), sshIngress, "0.0.0.0/0"); securityGroupApi.createRuleAllowingCidrBlock(securityGroup.getId(), webIngress, "0.0.0.0/0"); } out.println("Existing Security Groups: "); for (SecurityGroup thisSecurityGroup : securityGroupApi.list()) { out.println(" " + thisSecurityGroup); thisSecurityGroup.getRules().forEach(rule -> out.println(" " + rule)); } } else { out.println("No security group extension present; skipping security group checks."); } // # step-11 String ex_userdata = "#!/usr/bin/env bash\n" + " curl -L -s https://git.openstack.org/cgit/openstack/faafo/plain/contrib/install.sh | bash -s -- \\\n" + " -i faafo -i messaging -r api -r worker -r demo\n"; // # step-12 out.println("Checking for existing instance..."); String instanceName = "all-in-one"; Server allInOneInstance = null; for (Server thisInstance : serverApi.listInDetail().concat()) { if (thisInstance.getName().equals(instanceName)) { allInOneInstance = thisInstance; } } if (allInOneInstance != null) { out.println("Instance " + instanceName + " already exists. Skipping creation."); } else { out.println("Creating instance..."); CreateServerOptions allInOneOptions = CreateServerOptions.Builder.keyPairName(pub_key_file) .securityGroupNames(securityGroupName) // If not running in a single-tenant network this where you add your network... // .networks("79e8f822-99e1-436f-a62c-66e8d3706940") .userData(ex_userdata.getBytes()); ServerCreated allInOneInstanceCreated = serverApi.create(instanceName, imageId, flavorId, allInOneOptions); ServerPredicates.awaitActive(serverApi).apply(allInOneInstanceCreated.getId()); allInOneInstance = serverApi.get(allInOneInstanceCreated.getId()); out.println("Instance created: " + allInOneInstance.getId()); } out.println("Existing instances:"); serverApi.listInDetail().concat().forEach(instance -> out.println(" " + instance.getName())); // # step-13 out.println("Checking for unused floating IP's..."); FloatingIP unusedFloatingIP = null; if (conn.getFloatingIPApi(region).isPresent()) { FloatingIPApi floatingIPApi = conn.getFloatingIPApi(region).get(); List<FloatingIP> freeIP = floatingIPApi.list().toList().stream() .filter(floatingIp -> floatingIp.getInstanceId() == null).collect(Collectors.toList()); if (freeIP.size() > 0) { out.println("The following IPs are available:"); freeIP.forEach(floatingIP -> out.println(" " + floatingIP.getIp())); unusedFloatingIP = freeIP.get(0); } else { out.println("Creating new floating IP.... "); unusedFloatingIP = floatingIPApi.create(); } if (unusedFloatingIP != null) { out.println("Using: " + unusedFloatingIP.getIp()); } } else { out.println("No floating ip extension present; skipping floating ip creation."); } // # step-14 out.println(allInOneInstance.getAddresses()); if (allInOneInstance.getAccessIPv4() != null) { out.println("Public IP already assigned. Skipping attachment."); } else if (unusedFloatingIP != null) { out.println("Attaching new IP, please wait..."); // api must be present if we have managed to allocate a floating IP conn.getFloatingIPApi(region).get().addToServer(unusedFloatingIP.getIp(), allInOneInstance.getId()); //This operation takes some indeterminate amount of time; don't move on until it's done. while (allInOneInstance.getAccessIPv4() != null) { //Objects are not updated "live" so keep checking to make sure it's been added try { TimeUnit.SECONDS.sleep(1); } catch (InterruptedException ex) { out.println("Awakened prematurely."); } allInOneInstance = serverApi.get(allInOneInstance.getId()); } } // # step-15 out.print("Be patient: all going well, the Fractals app will soon be available at http://" + allInOneInstance.getAccessIPv4()); // # step-16 } }