After upgrade from 2.8.1- to 2.14 I can no longer provision nodes on rackspace.

First, I had to remove "Assign Public IP" (previously on) otherwise I got "java.lang.IllegalArgumentException: Floating IPs are required by options, but the extension is not available! options:"

Then, even after having remove that option, I cannot find a combination of credentials that allows jenkins to ssh the server to run the init script.

The connection to rackspace does work (tested from the interface) and the hardware & image are correct because I can see in my console that the server is being provisioned.

But once it's up, jenkins cannot SSH:

INFO: Provisioning new jclouds node
Mar 10, 2017 5:22:02 PM jenkins.plugins.jclouds.compute.JCloudsSlaveTemplate get
INFO: Setting osFamily to ubuntu
Mar 10, 2017 5:22:02 PM jenkins.plugins.jclouds.compute.JCloudsSlaveTemplate get
INFO: Setting osVersion to 14.04
Mar 10, 2017 5:22:02 PM jenkins.plugins.jclouds.compute.JCloudsSlaveTemplate get
INFO: Setting hardware Id to IAD/2
Mar 10, 2017 5:22:02 PM org.jclouds.logging.jdk.JDKLogger logInfo
INFO: >> searching params({osFamily=ubuntu, osVersion=14.04, hardwareId=IAD/2})
Mar 10, 2017 5:22:02 PM org.jclouds.logging.jdk.JDKLogger logInfo
INFO: <<   matched image(IAD/9ab07706-4b9f-41ad-a8f5-8b4fda2e40f7) hardware(IAD/2) location(IAD)
Mar 10, 2017 5:22:02 PM jenkins.plugins.jclouds.compute.JCloudsSlaveTemplate get
INFO: Setting adminCredentialsId to 502a5302-fb98-422a-a1dd-c8998d8c5e83
Mar 10, 2017 5:22:02 PM jenkins.plugins.jclouds.compute.JCloudsSlaveTemplate get
INFO: Using username/privatekey as adminCredentials
Mar 10, 2017 5:22:02 PM org.jclouds.logging.jdk.JDKLogger logInfo
INFO: >> running 1 node group(stuff) location(IAD) image(IAD/9ab07706-4b9f-41ad-a8f5-8b4fda2e40f7) hardwareProfile(IAD/2) options({loginUser=root, loginPrivateKeyPresent=true, scriptPresent=true, userMetadata={Name=stuff}, autoAssignFloati
ngIp=false, configDrive=false})
Mar 10, 2017 5:22:03 PM org.jclouds.logging.jdk.JDKLogger logInfo
INFO: >> adding node location(IAD) name(stuff-1be) image(9ab07706-4b9f-41ad-a8f5-8b4fda2e40f7) hardware(2)
Mar 10, 2017 5:22:03 PM org.jclouds.logging.jdk.JDKLogger logInfo
INFO: >> creating new server region(IAD) name(stuff-1be) image(9ab07706-4b9f-41ad-a8f5-8b4fda2e40f7) flavor(2) options(CreateServerOptions{keyName=null, metadata={Name=stuff, jclouds-group=stuff}, userData=null, availabilityZone=null, conf
igDrive=false})
Mar 10, 2017 5:22:18 PM org.jclouds.logging.jdk.JDKLogger logInfo
INFO: << PENDING node(IAD/a8ce5366-9635-40da-a250-ec0e8df597ff)
Mar 10, 2017 5:30:15 PM com.sonyericsson.hudson.plugins.gerrit.trigger.hudsontrigger.actions.manual.ManualTriggerAction getServerConfig
SEVERE: Could not find server null
Mar 10, 2017 5:31:20 PM org.jclouds.logging.jdk.JDKLogger logInfo
INFO: >> blocking on sockets [104.130.231.245:22, 10.176.7.13:22] for 600000 MILLISECONDS
Mar 10, 2017 5:31:34 PM org.jclouds.logging.jdk.JDKLogger logInfo
INFO: << socket 10.176.7.13:22 opened
Mar 10, 2017 5:31:34 PM net.schmizz.sshj.transport.TransportImpl init
INFO: Client identity string: SSH-2.0-SSHJ_0_9_2
Mar 10, 2017 5:31:34 PM net.schmizz.sshj.transport.TransportImpl init
INFO: Server identity string: SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.7
Mar 10, 2017 5:31:34 PM net.schmizz.sshj.transport.TransportImpl$1 notifyDisconnect
INFO: Disconnected - BY_APPLICATION
Mar 10, 2017 5:31:34 PM org.jclouds.logging.jdk.JDKLogger logInfo
INFO: << (root:rsa[fingerprint(e1:b3:f7:6b:c5:fd:83:6c:e9:46:a4:89:90:05:24:a0),sha1(e7:de:3c:34:a4:cb:7e:8b:50:95:4d:78:93:fa:9f:18:67:7d:b2:c1)]@10.176.7.13:22) error acquiring {hostAndPort=10.176.7.13:22, loginUser=root, ssh=null, conne
ctTimeout=60000, sessionTimeout=60000} (attempt 1 of 7): Exhausted available authentication methods
Mar 10, 2017 5:31:34 PM net.schmizz.sshj.transport.TransportImpl init
INFO: Client identity string: SSH-2.0-SSHJ_0_9_2
Mar 10, 2017 5:31:34 PM net.schmizz.sshj.transport.TransportImpl init
INFO: Server identity string: SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.7
Mar 10, 2017 5:31:34 PM net.schmizz.sshj.transport.TransportImpl$1 notifyDisconnect
INFO: Disconnected - BY_APPLICATION
Mar 10, 2017 5:31:34 PM org.jclouds.logging.jdk.JDKLogger logInfo
INFO: << (root:rsa[fingerprint(e1:b3:f7:6b:c5:fd:83:6c:e9:46:a4:89:90:05:24:a0),sha1(e7:de:3c:34:a4:cb:7e:8b:50:95:4d:78:93:fa:9f:18:67:7d:b2:c1)]@10.176.7.13:22) error acquiring {hostAndPort=10.176.7.13:22, loginUser=root, ssh=null, connectTimeout=60000, sessionTimeout=60000} (attempt 2 of 7): Exhausted available authentication methods
Mar 10, 2017 5:31:38 PM net.schmizz.sshj.transport.TransportImpl init
INFO: Client identity string: SSH-2.0-SSHJ_0_9_2
Mar 10, 2017 5:31:38 PM net.schmizz.sshj.transport.TransportImpl init
INFO: Server identity string: SSH-2.0-OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.7
Mar 10, 2017 5:31:38 PM net.schmizz.sshj.transport.TransportImpl$1 notifyDisconnect
INFO: Disconnected - BY_APPLICATION

That ends up to

Mar 10, 2017 5:32:14 PM org.jclouds.logging.jdk.JDKLogger logError
SEVERE: << (root:rsa[fingerprint(e1:b3:f7:6b:c5:fd:83:6c:e9:46:a4:89:90:05:24:a0),sha1(e7:de:3c:34:a4:cb:7e:8b:50:95:4d:78:93:fa:9f:18:67:7d:b2:c1)]@10.176.7.13:22) error acquiring {hostAndPort=10.176.7.13:22, loginUser=root, ssh=null, connectTimeout=60000, sessionTimeout=60000} (out of retries - max 7): Exhausted available authentication methods
net.schmizz.sshj.userauth.UserAuthException: Exhausted available authentication methods

The documentation is not clear on what is expected in term of credentials between

• Cloud RSA (used to be private & public key, now we need to setup a username: which one ?)
• Jenkins Credentials
• Admin credentials

Which one is used to run initscript and what should I set in term of usernames ?