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Subject: [jira] [Commented] (CLOUDSTACK-8715) Add support for
 qemu-guest-agent to libvirt provider
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    [ https://issues.apache.org/jira/browse/CLOUDSTACK-8715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15683121#comment-15683121 ] 

ASF GitHub Bot commented on CLOUDSTACK-8715:
--------------------------------------------

Github user rhtyd commented on the issue:

    https://github.com/apache/cloudstack/pull/1545
  
    @wido the Trillian env failed to run the tests for your latest PR due to following error:
    2016-11-21 09:59:54,000 INFO  [cloud.agent.AgentShell] (main:null) (logid:) Agent started
    2016-11-21 09:59:54,005 INFO  [cloud.agent.AgentShell] (main:null) (logid:) Implementation Version is 4.10.0.0-SNAPSHOT
    2016-11-21 09:59:54,007 INFO  [cloud.agent.AgentShell] (main:null) (logid:) agent.properties found at /etc/cloudstack/agent/agent.properties
    2016-11-21 09:59:54,013 INFO  [cloud.agent.AgentShell] (main:null) (logid:) Defaulting to using properties file for storage
    2016-11-21 09:59:54,016 INFO  [cloud.agent.AgentShell] (main:null) (logid:) Defaulting to the constant time backoff algorithm
    2016-11-21 09:59:54,035 INFO  [cloud.utils.LogUtils] (main:null) (logid:) log4j configuration found at /etc/cloudstack/agent/log4j-cloud.xml
    2016-11-21 09:59:54,050 INFO  [cloud.agent.AgentShell] (main:null) (logid:) Using default Java settings for IPv6 preference for agent connection
    2016-11-21 09:59:54,211 INFO  [cloud.agent.Agent] (main:null) (logid:) id is
    2016-11-21 09:59:54,251 ERROR [cloud.agent.AgentShell] (main:null) (logid:) Unable to start agent:
    java.lang.NullPointerException
            at java.io.File.<init>(File.java:277)
            at com.cloud.hypervisor.kvm.resource.LibvirtComputingResource.configure(LibvirtComputingResource.java:786)
            at com.cloud.agent.Agent.<init>(Agent.java:165)
            at com.cloud.agent.AgentShell.launchAgent(AgentShell.java:397)
            at com.cloud.agent.AgentShell.launchAgentFromClassInfo(AgentShell.java:367)
            at com.cloud.agent.AgentShell.launchAgent(AgentShell.java:351)
            at com.cloud.agent.AgentShell.start(AgentShell.java:456)
            at com.cloud.agent.AgentShell.main(AgentShell.java:491)
    
    Please modify the code to still work where an explicit path may not be defined, and that with your change KVM agent would run on CentOS6/7. Thanks.
    /cc @jburwell 


> Add support for qemu-guest-agent to libvirt provider
> ----------------------------------------------------
>
>                 Key: CLOUDSTACK-8715
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-8715
>             Project: CloudStack
>          Issue Type: New Feature
>      Security Level: Public(Anyone can view this level - this is the default.) 
>          Components: KVM
>            Reporter: Sten Spans
>            Assignee: Wido den Hollander
>              Labels: kvm, libvirt, qemu, systemvm
>             Fix For: Future
>
>
> The qemu guest agent is a newer part of qemu/kvm/libvirt which exposes quite a lot of useful functionality, which can only be provided by having an agent on the VM. This includes things like freezing/thawing filesystems (for backups), reading files on the guest, listing interfaces / ip addresses, etc.
> This feature has been requested by users, but is currently not implemented.
> http://users.cloudstack.apache.narkive.com/3TTmy3zj/enabling-qemu-guest-agent
> The first change needed is to add the following to the XML generated for KVM virtual machines,:
> <channel type='unix'>
>   <source mode='bind'/>
>   <target type='virtio' name='org.qemu.guest_agent.0'/>
> </channel>
> This provides the communication channel between libvirt and the agent on the host. All in all a pretty simple change to LibvirtComputingResource.java / LibvirtVMDef.java
> Secondly the qemu-guest-agent package needs to be added to the systemvm template.



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