Update: Using jclouds 1.5.1
I’m just starting to get familiar with the open source jclouds cross-cloud toolkit. Whenever I get started with something new like this I like to start out with the most simple application possible that still does something sort of useful. And when starting out, I prefer to work from the command line so I can get a feel for how something is really put together. After that, when I move to using a build tool like Maven or Ant or putting everything into Eclipse or another IDE, I have a better understanding of its dependecies and config.
With that in mind I headed over to the jclouds installation page to download the JARs for it. Okay…what is lein???
Looks lein is part of leiningen. One of the tools that jclouds can use to manage dependencies. Downloading the lein script is no problem but I also need the project.clj file. No problem…but what version to put in the dependencies list?
After sifting through the jclouds group and jclouds-dev groups I find a post that points to beta.10 being the latest and greatest. I find a blog that points to 1.5.1 being the latest and greatest. I’ll try putting that in the project.clj file and give it a shot.
| $ mkdir jclouds-test | |
| $ cd jcloud-test | |
| $ curl -o lein.sh https://raw.github.com/technomancy/leiningen/stable/bin/lein | |
| % Total % Received % Xferd Average Speed Time Time Time Current | |
| Dload Upload Total Spent Left Speed | |
| 100 9905 100 9905 0 0 13005 0 --:--:-- --:--:-- --:--:-- 31444 | |
| $ chmod u+x lein.sh | |
| $ echo '(defproject deps "1" :dependencies [[org.jclouds/jclouds-all "1.5.1"] [org.jclouds.driver/jclouds-sshj "1.5.1"]])' > project.clj | |
| $ ./lein.sh deps | |
| <output omitted> | |
| $ ls lib/ | |
| aopalliance-1.0.jar elastichosts-sat-p-1.5.1.jar ninefold-storage-1.5.1.jar | |
| atmos-1.5.1.jar elasticstack-1.5.1.jar nova-1.5.1.jar | |
| aws-cloudwatch-1.5.1.jar eucalyptus-1.5.1.jar oauth-20100527.jar | |
| aws-common-1.5.1.jar eucalyptus-partnercloud-ec2-1.5.1.jar openhosting-east1-1.5.1.jar | |
| aws-ec2-1.5.1.jar eucalyptus-partnercloud-s3-1.5.1.jar openstack-common-1.5.1.jar | |
| aws-s3-1.5.1.jar filesystem-1.5.1.jar openstack-keystone-1.5.1.jar | |
| aws-sqs-1.5.1.jar go2cloud-jhb1-1.5.1.jar openstack-nova-1.5.1.jar | |
| azure-common-1.5.1.jar gogrid-1.5.1.jar openstack-nova-ec2-1.5.1.jar | |
| azureblob-1.5.1.jar greenhousedata-element-vcloud-1.5.1.jar rackspace-cloudidentity-1.5.1.jar | |
| bcprov-jdk16-1.46.jar gson-2.2.jar rackspace-cloudservers-us-1.5.1.jar | |
| bluelock-vcloud-zone01-1.5.1.jar guava-13.0.jar rimuhosting-1.5.1.jar | |
| byon-1.5.1.jar guice-3.0.jar rocoto-6.1.jar | |
| cloudfiles-1.5.1.jar guice-assistedinject-3.0.jar s3-1.5.1.jar | |
| cloudfiles-uk-1.5.1.jar hpcloud-compute-1.5.1.jar serverlove-z1-man-1.5.1.jar | |
| cloudfiles-us-1.5.1.jar hpcloud-objectstorage-1.5.1.jar skalicloud-sdg-my-1.5.1.jar | |
| cloudloadbalancers-1.5.1.jar java-xmlbuilder-0.4.jar slf4j-api-1.6.4.jar | |
| cloudloadbalancers-uk-1.5.1.jar javax.inject-1.jar slicehost-1.5.1.jar | |
| cloudloadbalancers-us-1.5.1.jar jclouds-all-1.5.1.jar snakeyaml-1.10.jar | |
| cloudonestorage-1.5.1.jar jclouds-allblobstore-1.5.1.jar softlayer-1.5.1.jar | |
| cloudservers-1.5.1.jar jclouds-allcompute-1.5.1.jar sqs-1.5.1.jar | |
| cloudservers-uk-1.5.1.jar jclouds-allloadbalancer-1.5.1.jar sshj-0.8.1.jar | |
| cloudservers-us-1.5.1.jar jclouds-blobstore-1.5.1.jar stratogen-vcloud-mycloud-1.5.1.jar | |
| cloudsigma-1.5.1.jar jclouds-bouncycastle-1.5.1.jar swift-1.5.1.jar | |
| cloudsigma-lvs-1.5.1.jar jclouds-compute-1.5.1.jar synaptic-storage-1.5.1.jar | |
| cloudsigma-zrh-1.5.1.jar jclouds-core-1.5.1.jar trmk-common-1.5.1.jar | |
| cloudstack-1.5.1.jar jclouds-loadbalancer-1.5.1.jar trmk-ecloud-1.5.1.jar | |
| cloudwatch-1.5.1.jar jclouds-scriptbuilder-1.5.1.jar trmk-vcloudexpress-1.5.1.jar | |
| commons-io-2.4.jar jclouds-slf4j-1.5.1.jar trystack-nova-1.5.1.jar | |
| deltacloud-1.5.1.jar jclouds-sshj-1.5.1.jar vcloud-1.5.1.jar | |
| ec2-1.5.1.jar jersey-core-1.12.jar walrus-1.5.1.jar | |
| elastichosts-lon-b-1.5.1.jar jsr250-api-1.0.jar | |
| elastichosts-lon-p-1.5.1.jar ninefold-compute-1.5.1.jar |
That’s a lot of JARs.
Now all I want to do is list all of my servers on the Rackspace open cloud. After some trial and error I came up with the following app.
| import java.util.Set; | |
| import java.lang.Thread.UncaughtExceptionHandler; | |
| import org.jclouds.ContextBuilder; | |
| import org.jclouds.compute.ComputeService; | |
| import org.jclouds.compute.ComputeServiceContext; | |
| import org.jclouds.compute.domain.ComputeMetadata; | |
| public class JCloudsTest { | |
| private ComputeService compute; | |
| public static void main(String[] args) { | |
| JCloudsTest jCloudsTest = new JCloudsTest(); | |
| jCloudsTest.init(); | |
| jCloudsTest.listServers(); | |
| System.exit(0); | |
| } | |
| private void listServers() { | |
| System.out.println("Calling listNodes..."); | |
| Set<? extends ComputeMetadata> nodes = compute.listNodes(); | |
| System.out.println("Total Number of Nodes = " + nodes.size()); | |
| for (ComputeMetadata node: nodes) { | |
| System.out.println("\t" + node); | |
| } | |
| } | |
| private void init() { | |
| Thread.setDefaultUncaughtExceptionHandler(new UncaughtExceptionHandler() { | |
| public void uncaughtException(Thread t, Throwable e) { | |
| e.printStackTrace(); | |
| System.exit(1); | |
| } | |
| }); | |
| String provider = "rackspace-cloudservers-us"; | |
| String identity = "my-username"; | |
| String apiKey = "my-api-key"; | |
| ComputeServiceContext context = ContextBuilder.newBuilder(provider) | |
| .credentials(identity, apiKey) | |
| .buildView(ComputeServiceContext.class); | |
| compute = context.getComputeService(); | |
| } | |
| } |
Follow the instructions below to compile and run the app. Thankfully Java 1.6 allows for wildcard expansion on the command line, otherwise it would be a serious pain including all of those JARs.
| $ pwd | |
| /Users/phymata/test/jclouds-test | |
| $ ls | |
| JCloudsTest.java lein.sh lib project.clj | |
| $ javac -cp ".:lib/*" JCloudsTest.java | |
| $ ls | |
| JCloudsTest$1.class JCloudsTest.class JCloudsTest.java lein.sh lib project.clj | |
| $ java -cp ".:lib/*" JCloudsTest | |
| Calling listNodes... | |
| Total Number of Nodes = 1 | |
| {id=DFW/45b23d7b-ec6a-49dc-a642-dadbba42af17, providerId=45b23d7b-ec6a-49dc-a642-dadbba42af17, name=test-1b, location={scope=HOST, id=44ae081dce76afa64907ffd3822debbe4c51644611e4399478bb8034, description=44ae081dce76afa64907ffd3822debbe4c51644611e4399478bb8034, parent=DFW}, group=test, imageId=DFW/5cebb13a-f783-4f8c-8058-c4182c724ccd, os={family=ubuntu, name=Ubuntu 12.04 LTS (Precise Pangolin), version=12.04, description=Ubuntu 12.04 LTS (Precise Pangolin), is64Bit=true}, status=RUNNING, loginPort=22, hostname=test-1b, privateAddresses=[123.123.123.123], publicAddresses=[123.123.123.123], hardware={id=DFW/3, providerId=3, name=1GB Standard Instance, location={scope=ZONE, id=DFW, description=DFW, parent=rackspace-cloudservers-us, iso3166Codes=[US-TX]}, processors=[{cores=1.0, speed=1.0}], ram=1024, volumes=[{type=LOCAL, size=40.0, bootDevice=true, durable=true}], supportsImage=ALWAYS_TRUE}} |
There you have it. If anyone is more familiar with lein and/or leiningen and can show me how to limit it to downloading just the JARs I need, let me know in the comments.
This post was written on Mac OS X 10.8, Java 1.6.0, jclouds 1.5.1 1.5.0-beta.10. If you’re on a different OS and run into problems, please feel free to comment.