[libvirt] RFC: libvirt java bindings based on JNA
Thomas Treutner
thomas at scripty.at
Tue Jul 28 12:21:04 UTC 2009
On Saturday 25 July 2009 13:56:36 Bryan Kearney wrote:
> I would like to get some comments on an initial cut of the java bindings
> on top of JNA[1]. They are not 100% complete (see below), but they are
> good enough to be criticized. In addition, if there are features
> additions to the API which people are interested in, I would appreciate
> the feedback on that.
Thanks for your work!
I pulled from git, it compiles fine when provided with jna.jar - couldn't find
that except in my Eclipse 3.4 path.
When using it with my tiny test application (which works fine with the JNI
version), it first complains that /etc/pki/CA/cacert.pem can not be found. As
I installed libvirt from source, it's in /usr/local/..., working fine with
JNI. So I did a symlink workaround for now.
But fixing that, it doesn't work either:
libvir: error : invalid argument in could not parse connection URI
exception caught:org.libvirt.LibvirtException: invalid argument in could not
parse connection URI
level:VIR_ERR_ERROR
code:VIR_ERR_INVALID_ARG
domain:VIR_FROM_NONE
hasConn:false
hasDom:false
hasNet:false
message:invalid argument in could not parse connection URI
str1:invalid argument in %s
str2:could not parse connection URI
str3:null
int1:0
int2:0
Code is:
...
conn = new Connect("xen://node02", false);
...
which works fine with JNI.
When I use the test class (directly on a node where libvirtd is running, or
remote, it doesn't matter), connections to the test driver are refused,
although some test information seems to be gathered, and connecting with
virsh works perfectly:
node02:~# virsh --connect test:///default
node02:~# java -cp libvirt-0.3.0pre.jar:jna.jar:. test
libvir: Remote error : unable to connect to 'localhost': Connection refused
exception caught:org.libvirt.LibvirtException: unable to connect
to 'localhost': Connection refused
level:VIR_ERR_ERROR
code:VIR_ERR_SYSTEM_ERROR
domain:VIR_FROM_REMOTE
hasConn:false
hasDom:false
hasNet:false
message:unable to connect to 'localhost': Connection refused
str1:%s
str2:unable to connect to 'localhost': Connection refused
str3:null
int1:-1
int2:-1
virNodeInfo.model:i686
virNodeInfo.memory:3145728
virNodeInfo.cpus:16
virNodeInfo.nodes:2
virNodeInfo.sockets:2
virNodeInfo.cores:2
virNodeInfo.threads:2
getHostName:node02.scripty.at
getCapabilities:<capabilities>
<host>
<cpu>
<arch>i686</arch>
<features>
<pae/>
<nonpae/>
</features>
</cpu>
<topology>
<cells num='2'>
<cell id='0'>
<cpus num='8'>
<cpu id='0'/>
<cpu id='2'/>
<cpu id='4'/>
<cpu id='6'/>
<cpu id='8'/>
<cpu id='10'/>
<cpu id='12'/>
<cpu id='14'/>
</cpus>
</cell>
<cell id='1'>
<cpus num='8'>
<cpu id='1'/>
<cpu id='3'/>
<cpu id='5'/>
<cpu id='7'/>
<cpu id='9'/>
<cpu id='11'/>
<cpu id='13'/>
<cpu id='15'/>
</cpus>
</cell>
</cells>
</topology>
</host>
<guest>
<os_type>hvm</os_type>
<arch name='i686'>
<wordsize>32</wordsize>
<emulator>/usr/bin/test-hv</emulator>
<domain type='test'>
</domain>
</arch>
<features>
<pae/>
<nonpae/>
</features>
</guest>
<guest>
<os_type>xen</os_type>
<arch name='i686'>
<wordsize>32</wordsize>
<emulator>/usr/bin/test-hv</emulator>
<domain type='test'>
</domain>
</arch>
<features>
<pae/>
<nonpae/>
</features>
</guest>
</capabilities>
getMaxVcpus:32
getType:Test
getURI:test://
getVersion:2
getLibVirVersion:4006
conn.networkCreateXML: org.libvirt.Network at 3d434234
conn.networkDefineXML: org.libvirt.Network at 30f7f540
numOfDefinedNetworks:1
listDefinedNetworks:[Ljava.lang.String;@10b61fd1
-> deftest
numOfNetworks:2
listNetworks:[Ljava.lang.String;@24e2dae9
-> createst
-> default
conn.domainDefineXML:org.libvirt.Domain at 27ce2dd4
conn.domainCreateLinux:org.libvirt.Domain at 5122cdb6
numOfDefinedDomains:1
listDefinedDomains:[Ljava.lang.String;@43ef9157
deftest
numOfDomains:2
listDomains:[I at 252f0999
-> 2
-> 1
networkLookupByName: deftest
<============== FIXME ================>
networkLookupByUUIDString: deftest
virNetworkGetXMLDesc:<network>
<name>deftest</name>
<uuid>004b96e1-2d78-c30f-5aa5-f03c87d21e67</uuid>
<forward dev='eth0' mode='nat'/>
<bridge name='deftest' stp='on' forwardDelay='0' />
<ip address='192.168.88.1' netmask='255.255.255.0'>
<dhcp>
<range start='192.168.88.128' end='192.168.88.253' />
</dhcp>
</ip>
</network>
virNetworkGetAutostart:false
virNetworkGetBridgeName:deftest
virNetworkGetName:deftest
virNetworkGetUUID:[I at 443ecfff
<============== FIXME ================>
004bffffff96ffffffe12d78ffffffc30f5affffffa5fffffff03cffffff87ffffffd21e67
virNetworkGetName:004b96e1-2d78-c30f-5aa5-f03c87d21e67
virNetworkDestroy:
virNetworkCreate:
virNetworkCreate (should error):
libvir: Test error deftest: internal error Network is already running
exception caught:org.libvirt.LibvirtException: internal error Network is
already running
level:VIR_ERR_ERROR
code:VIR_ERR_INTERNAL_ERROR
domain:VIR_FROM_TEST
hasConn:false
hasDom:false
hasNet:false
message:internal error Network is already running
str1:internal error %s
str2:Network is already running
str3:null
int1:0
int2:0
domainLookupByID: org.libvirt.Domain at a4a63d8
domainLookupByName: org.libvirt.Domain at 19e0ff2f
virDomainGetXMLDesc:<domain type='test' id='1'>
<name>test</name>
<uuid>d4bf820b-3c84-eebc-0947-98e00ed3c94f</uuid>
<memory>8388608</memory>
<currentMemory>2097152</currentMemory>
<vcpu>2</vcpu>
<os>
<type arch='i686'>hvm</type>
<boot dev='hd'/>
</os>
<clock offset='utc'/>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>destroy</on_crash>
<devices>
</devices>
</domain>
virDomainGetAutostart:false
virDomainGetConnect:org.libvirt.Connect at 29173ef
virDomainGetID:1
virDomainGetInfo:state:VIR_DOMAIN_RUNNING
maxMem:8388608
memory:2097152
nrVirtCpu:2
cpuTime:1248783222588997000
virDomainGetMaxMemory:8388608
libvir: error : this function is not supported by the hypervisor:
virDomainGetMaxVcpus
virDomainGetName:test
virDomainGetOSType:linux
virDomainGetSchedulerType:[Ljava.lang.String;@3a860d49
virDomainGetSchedulerParameters:[Lorg.libvirt.SchedParameter;@18872380
Uint:weight:1696596736
VIR_DOMAIN_SCHED_FIELD_UINT:weight:0
virDomainGetUUID:[I at 502bb514
<============== FIXME ================>
ffffffd4ffffffbfffffff820b3cffffff84ffffffeeffffffbc0947ffffff98ffffffe00effffffd3ffffffc94f
virDomainGetUUIDString:d4bf820b-3c84-eebc-0947-98e00ed3c94f
libvir: error : invalid connection pointer in virConnectGetHostname
null
Fini!
Am I doing something wron
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