Help compiling OpenStack example with maven

Leander

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Aug 28, 2012, 10:44:51 AM8/28/12

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Hello,

I'm having some trouble compiling the OpenStack example.

This is my source file:

package jcloud_test.jcloud_test;

import static org.jclouds.openstack.nova.options.CreateServerOptions.Builder.withFile;

import static org.jclouds.openstack.nova.options.ListOptions.Builder.*;

import org.jclouds.Constants;

/**

* Hello world!

*

*/

public class App

{

public static void main( String[] args )

{

Properties overrides = new Properties();

//point the JClouds to the Openstack v 1.1 API endpoint URL

//for swift version 1.4.4 the URL is of the form: http(s)://ip:port/auth

overrides.setProperty(Constants.PROPERTY_ENDPOINT, "https://127.0.0.1:35357/v2.0/");

// get a context with nova that offers the portable ComputeService api

ComputeServiceContext context = new ComputeServiceContextFactory().createContext("nova", "admin", "nova",

ImmutableSet.<Module> of(new JschSshClientModule()),

overrides);

// when you need access to nova-specific features, use the provider-specific context

NovaClient novaClient = NovaClient.class.cast(context.getProviderSpecificContext()

.getApi());

// list the id and name of images I have access to, starting at index 200 limited to 100 results.

List<Image> images = novaClient.listImages(startAt(0).maxResults(100));

for (Image i : images) {

System.out.println(i);

}

context.close();

}

This is my pom.xml file:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">

<groupId>jcloud-test</groupId>

<artifactId>jcloud-test</artifactId>

<version>0.0.1-SNAPSHOT</version>

<name>jcloud-test</name>

<url>http://maven.apache.org</url>

<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

</properties>

<build>

<artifactId>maven-compiler-plugin</artifactId>

</configuration>

</plugin>

</plugins>

</build>

<groupId>org.jclouds</groupId>

<artifactId>jclouds-allcompute</artifactId>

<version>1.5.0-alpha.1</version>

</dependency>

<groupId>org.jclouds</groupId>

<artifactId>jclouds-allblobstore</artifactId>

<version>1.5.0-alpha.1</version>

</dependency>

<groupId>junit</groupId>

<artifactId>junit</artifactId>

</dependency>

</dependencies>

</project>

And these are the errors produced with mvn compile:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.5.1:compile (default-compile) on project jcloud-test: Compilation failure: Compilation failure:

[ERROR] /home/gsd/jcloud-test/src/main/java/jcloud_test/jcloud_test/App.java:[15,2] cannot find symbol

[ERROR] symbol : class Properties

[ERROR] location: class jcloud_test.jcloud_test.App

[ERROR] /home/gsd/jcloud-test/src/main/java/jcloud_test/jcloud_test/App.java:[15,29] cannot find symbol

[ERROR] symbol : class Properties

[ERROR] location: class jcloud_test.jcloud_test.App

[ERROR] /home/gsd/jcloud-test/src/main/java/jcloud_test/jcloud_test/App.java:[21,2] cannot find symbol

[ERROR] symbol : class ComputeServiceContext

[ERROR] location: class jcloud_test.jcloud_test.App

[ERROR] /home/gsd/jcloud-test/src/main/java/jcloud_test/jcloud_test/App.java:[22,33] cannot find symbol

[ERROR] symbol : class JschSshClientModule

[ERROR] location: class jcloud_test.jcloud_test.App

[ERROR] /home/gsd/jcloud-test/src/main/java/jcloud_test/jcloud_test/App.java:[22,18] cannot find symbol

[ERROR] symbol : class Module

[ERROR] location: class jcloud_test.jcloud_test.App

[ERROR] /home/gsd/jcloud-test/src/main/java/jcloud_test/jcloud_test/App.java:[22,4] cannot find symbol

[ERROR] symbol : variable ImmutableSet

[ERROR] location: class jcloud_test.jcloud_test.App

[ERROR] /home/gsd/jcloud-test/src/main/java/jcloud_test/jcloud_test/App.java:[21,38] cannot find symbol

[ERROR] symbol : class ComputeServiceContextFactory

[ERROR] location: class jcloud_test.jcloud_test.App

[ERROR] /home/gsd/jcloud-test/src/main/java/jcloud_test/jcloud_test/App.java:[26,2] cannot find symbol

[ERROR] symbol : class NovaClient

[ERROR] location: class jcloud_test.jcloud_test.App

[ERROR] /home/gsd/jcloud-test/src/main/java/jcloud_test/jcloud_test/App.java:[26,26] cannot find symbol

[ERROR] symbol : class NovaClient

[ERROR] location: class jcloud_test.jcloud_test.App

[ERROR] /home/gsd/jcloud-test/src/main/java/jcloud_test/jcloud_test/App.java:[30,2] cannot find symbol

[ERROR] symbol : class List

[ERROR] location: class jcloud_test.jcloud_test.App

[ERROR] /home/gsd/jcloud-test/src/main/java/jcloud_test/jcloud_test/App.java:[30,7] cannot find symbol

[ERROR] symbol : class Image

[ERROR] location: class jcloud_test.jcloud_test.App

[ERROR] /home/gsd/jcloud-test/src/main/java/jcloud_test/jcloud_test/App.java:[32,7] cannot find symbol

[ERROR] symbol : class Image

[ERROR] location: class jcloud_test.jcloud_test.App

Any ideas? I'm not very acquainted with the maven build tools, so i'm not sure what's missing here.

Everett Toews

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Aug 28, 2012, 11:54:21 AM8/28/12

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It looks like you're missing a lot of dependencies. Have a look at http://www.jclouds.org/documentation/userguide/installation-guide/ to get everything installed properly. You'll also want to use "-beta.11" everywhere instead of "-alpha.1". beta.11 is the latest and greatest.

If that doesn't work for you, you might want to give my blog post http://blog.phymata.com/2012/08/15/getting-started-with-jclouds/ a try but substitute your own Properties as your "provider".

Hope this helps,

Everett

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Andrew Phillips

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Aug 28, 2012, 12:59:01 PM8/28/12

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Do you remember where you get this example code from? OpenStack
support has had a lot of work since 1.5.0-alpha.1, so I'm not sure
what that code is doing is very current any more.

You may be better off starting out with the OpenStack Nova invocation
of the compute-basics example [1].

Hope this helps!

ap

[1] https://github.com/jclouds/jclouds-examples/tree/master/compute-basics

Leander Bessa Beernaert

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Aug 29, 2012, 8:16:16 AM8/29/12

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I got the code from http://www.jclouds.org/documentation/quickstart/openstack/. I'll look into the example you supplied. I keep getting the same errors with manual compilation and with maven.

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Cumprimentos / Regards,

Leander

Leander Bessa Beernaert

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Aug 29, 2012, 8:48:06 AM8/29/12

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So i have updated my dependencies to the latest beta based on the pom.xml from the example code. I'm just missing a few imports which i can't seem to be able to find:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.5.1:compile (default-compile) on project jcloud-test: Compilation failure: Compilation failure:

[ERROR] /home/gsd/jcloud-test/src/main/java/jcloud_test/jcloud_test/App.java:[55,38] cannot find symbol

[ERROR] symbol : class ComputeServiceContextFactory

[ERROR] location: class jcloud_test.jcloud_test.App

[ERROR] /home/gsd/jcloud-test/src/main/java/jcloud_test/jcloud_test/App.java:[60,2] cannot find symbol

[ERROR] symbol : class NovaClient

[ERROR] location: class jcloud_test.jcloud_test.App

[ERROR] /home/gsd/jcloud-test/src/main/java/jcloud_test/jcloud_test/App.java:[60,26] cannot find symbol

[ERROR] symbol : class NovaClient

[ERROR] location: class jcloud_test.jcloud_test.App

[ERROR] /home/gsd/jcloud-test/src/main/java/jcloud_test/jcloud_test/App.java:[64,7] cannot find symbol

[ERROR] symbol : class Image

[ERROR] location: class jcloud_test.jcloud_test.App

[ERROR] /home/gsd/jcloud-test/src/main/java/jcloud_test/jcloud_test/App.java:[66,7] cannot find symbol

[ERROR] symbol : class Image

[ERROR] location: class jcloud_test.jcloud_test.App

Any ideas?

Andrew Phillips

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Aug 29, 2012, 9:04:12 AM8/29/12

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> I got the code from
> http://www.jclouds.org/documentation/quickstart/openstack/. I'll look into
> the example you supplied. I keep getting the same errors with manual
> compilation and with maven.

As that page warns, "This page is a work in progress", so I think you
might be using an outdated sample there :-( And in any case, that is a
code snippet and not a full class - as Everett pointed out, there are
many imports missing.

Can you try Everett's sample [1] or the jclouds-examples code [2] instead?

Thanks!

ap

[1] http://blog.phymata.com/2012/08/15/getting-started-with-jclouds/
[2] https://github.com/jclouds/jclouds-examples/tree/master/compute-basics

Leander Bessa Beernaert

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Aug 29, 2012, 9:19:44 AM8/29/12

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I can compile Everett's sample. However, i'm not sure how i can adapt it to my OpenStack installation.

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Everett Toews

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Aug 29, 2012, 9:29:45 AM8/29/12

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In the line

ComputeServiceContext context = ContextBuilder.newBuilder(provider)

.credentials(identity, apiKey)

.buildView(ComputeServiceContext.class);

Add your overrides like so,

ComputeServiceContext context = ContextBuilder.newBuilder(provider)

.credentials(identity, apiKey)

.overrides(overrides)

.buildView(ComputeServiceContext.class);

I haven't actually tried this yet so you may have to fiddle with the settings a bit. Please let us know how it turns out!

Everett

From: Leander Bessa Beernaert <lean...@gmail.com>
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Date: Wednesday, August 29, 2012 8:19 AM
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Leander Bessa Beernaert

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Aug 29, 2012, 9:30:35 AM8/29/12

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I think i figured out how to proceed. I made these changes to the init method of Everett's sample:

private void init() {

Thread.setDefaultUncaughtExceptionHandler(new UncaughtExceptionHandler() {

public void uncaughtException(Thread t, Throwable e) {

e.printStackTrace();

System.exit(1);

}

});

String provider = "nova";

String identity = "admin";

String apiKey = "nova";

ComputeServiceContext context = ContextBuilder.newBuilder(provider)

.credentials(identity, apiKey)

.endpoint("http://127.0.0.1:35357/v2.0/")

.buildView(ComputeServiceContext.class);

compute = context.getComputeService();

}

When i run the jar, the output produced is this:

Calling listNodes...

Total Number of Nodes = 0

If i'm not mistaken, a Node is the equivalent of a virtual instance. However, i have 5 instances running at the moment in my OpenStack setup. Did i do something wrong?

Leander Bessa Beernaert

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Aug 29, 2012, 9:36:12 AM8/29/12

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I tried setting the provider according to Everett's example again and this time i get this output:

Calling listNodes...

Aug 29, 2012 1:35:14 PM org.jclouds.logging.jdk.JDKLogger logError

SEVERE: Cannot retry after server error, command has exceeded retry limit 5: [method=CloudIdentityAuthenticationAsyncApi.authenticateWithTenantNameAndCredentials, request=POST http://192.168.111.220:35357/v2.0/tokens HTTP/1.1]

com.google.common.util.concurrent.UncheckedExecutionException: org.jclouds.http.HttpResponseException: command: POST http://192.168.111.220:35357/v2.0/tokens HTTP/1.1 failed with response: HTTP/1.1 500 Internal Server Error; content: [{"error": {"message": "An unexpected error prevented the server from fulfilling your request. local variable 'metadata_ref' referenced before assignment", "code": 500, "title": "Internal Server Error"}}]

at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2258)

at com.google.common.cache.LocalCache.get(LocalCache.java:3990)

at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:3994)

at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4878)

at org.jclouds.openstack.keystone.v2_0.config.KeystoneAuthenticationModule$2.get(KeystoneAuthenticationModule.java:206)

at org.jclouds.openstack.keystone.v2_0.config.KeystoneAuthenticationModule$2.get(KeystoneAuthenticationModule.java:202)

at org.jclouds.openstack.keystone.v2_0.suppliers.LocationIdToURIFromAccessForTypeAndVersion.get(LocationIdToURIFromAccessForTypeAndVersion.java:63)

at org.jclouds.openstack.keystone.v2_0.suppliers.LocationIdToURIFromAccessForTypeAndVersion.get(LocationIdToURIFromAccessForTypeAndVersion.java:42)

at org.jclouds.rest.suppliers.MemoizedRetryOnTimeOutButNotOnAuthorizationExceptionSupplier$SetAndThrowAuthorizationExceptionSupplierBackedLoader.load(MemoizedRetryOnTimeOutButNotOnAuthorizationExceptionSupplier.java:91)

at org.jclouds.rest.suppliers.MemoizedRetryOnTimeOutButNotOnAuthorizationExceptionSupplier$SetAndThrowAuthorizationExceptionSupplierBackedLoader.load(MemoizedRetryOnTimeOutButNotOnAuthorizationExceptionSupplier.java:72)

at com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3589)

at com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2374)

at com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2337)

at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2252)

at com.google.common.cache.LocalCache.get(LocalCache.java:3990)

at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:3994)

at com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4878)

at org.jclouds.rest.suppliers.MemoizedRetryOnTimeOutButNotOnAuthorizationExceptionSupplier.get(MemoizedRetryOnTimeOutButNotOnAuthorizationExceptionSupplier.java:140)

at org.jclouds.location.suppliers.derived.ZoneIdsFromZoneIdToURIKeySet.get(ZoneIdsFromZoneIdToURIKeySet.java:48)

at org.jclouds.location.suppliers.derived.ZoneIdsFromZoneIdToURIKeySet.get(ZoneIdsFromZoneIdToURIKeySet.java:36)

at org.jclouds.util.Suppliers2$SupplierComposition.get(Suppliers2.java:160)