Github user johnmccabe commented on the pull request:
https://github.com/apache/brooklyn-server/pull/132#issuecomment-218096768
Spoke too soon on the location working with privateKey, throws an NPE when
deploying a docker infrastructure via Clocker:
```
Caused by: java.lang.NullPointerException: id
at
com.google.common.base.Preconditions.checkNotNull(Preconditions.java:229)
~[guava-16.0.1.jar:na]
at
org.jclouds.compute.internal.BaseComputeService.getImage(BaseComputeService.java:410)
~[jclouds-compute-1.9.2.jar:1.9.2]
at
org.apache.brooklyn.location.jclouds.JcloudsSshMachineLocation.getOptionalImage(JcloudsSshMachineLocation.java:226)
~[brooklyn-locations-jclouds-0.10.0-SNAPSHOT.jar:0.10.0-SNAPSHOT]
at
org.apache.brooklyn.location.jclouds.JcloudsSshMachineLocation.getOptionalOperatingSystem(JcloudsSshMachineLocation.java:504)
~[brooklyn-locations-jclouds-0.10.0-SNAPSHOT.jar:0.10.0-SNAPSHOT]
at
org.apache.brooklyn.location.jclouds.JcloudsSshMachineLocation.inferMachineDetails(JcloudsSshMachineLocation.java:522)
~[brooklyn-locations-jclouds-0.10.0-SNAPSHOT.jar:0.10.0-SNAPSHOT]
at
org.apache.brooklyn.location.ssh.SshMachineLocation.getMachineDetails(SshMachineLocation.java:1056)
~[brooklyn-core-0.10.0-SNAPSHOT.jar:0.10.0-SNAPSHOT]
at
clocker.docker.entity.DockerHostSshDriver.install(DockerHostSshDriver.java:183)
~[brooklyn-clocker-docker-1.2.0-SNAPSHOT.jar:1.2.0-SNAPSHOT]
at
org.apache.brooklyn.entity.software.base.AbstractSoftwareProcessDriver$2$6.run(AbstractSoftwareProcessDriver.java:159)
~[brooklyn-software-base-0.10.0-SNAPSHOT.jar:0.10.0-SNAPSHOT]
at
java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
~[na:1.7.0_99]
at
org.apache.brooklyn.util.core.task.DynamicSequentialTask$DstJob.call(DynamicSequentialTask.java:359)
~[brooklyn-core-0.10.0-SNAPSHOT.jar:0.10.0-SNAPSHOT]
... 5 common frames omitted
```
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