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So, this is an exercise to show libvirt capabilities. Firstly, for
each host NUMA nodes some statistics are printed out, i.e. total
memory and free memory. Then, for each running domain, that has memory
strictly bound to certain host nodes, a small statistics of how much
memory it takes is printed out too. For instance:
# ./examples/nodestats.py
NUMA stats
NUMA nodes: 0 1 2 3
MemTotal: 3950 3967 3937 3943
MemFree: 66 56 42 41
Domain 'fedora':
Overall memory: 1536 MiB
Domain 'fedora22':
Overall memory: 2048 MiB
Domain 'fedora21':
Overall memory: 1024 MiB nodes 0-1
Node 0: 1024 MiB nodes 0-1
Domain 'gentoo':
Overall memory: 4096 MiB nodes 0-3
Node 0: 1024 MiB nodes 0
Node 1: 1024 MiB nodes 1
Node 2: 1024 MiB nodes 2
Node 3: 1024 MiB nodes 3
We can see 4 host NUMA nodes, all of them having roughly 4GB of RAM.
Yeah, all of them has nearly all the memory consumed. Then, there are
four domains running. For instance, domain 'fedora' has 1.5GB memory
which is not pinned onto any specific host NUMA node. Domain 'gentoo' on
the other hand has 4GB memory and has 4 NUMA nodes which are pinned 1:1
to host nodes.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
This example allows to use the guest agent event and metadata to track
vCPU count set via the guest agent (agent-based onlining/offlining) and
keep it persistent accross domain restarts.
The daemon listens for the agent lifecycle event, and if it's received
it looks into doman's metadata to see whether a desired count was set
and issues the guest agent command.
examples/Makefile.am:
* Add new file domipaddrs.py
examples/README:
* Add documentation for the python example
libvirt-override-api.xml:
* Add new symbol for virDomainInterfacesAddresses
libvirt-override.c:
* Hand written python api
Example:
$ python examples/domipaddrs.py qemu:///system f18
Interface MAC address Protocol Address
vnet0 52:54:00:20:70:3d ipv4 192.168.105.240/16
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
The dhcpleases example had an old usage of print function. The formating
of leases record was also wrong.
The event-test example had an old usage of exceptions.
It's mainly to make examples compatible with python3.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
This API returns a list of DHCP leases for all network interfaces
connected to the given virtual network or limited output just for one
interface if mac is specified.
Example Output:
[{'iface': 'virbr3', 'ipaddr': '192.168.150.181', 'hostname': 'ubuntu14',
'expirytime': 1403737495L, 'prefix': 24, 'clientid': None,
'mac': '52:54:00:e8:73:eb', 'iaid': None, 'type': 0},
{'iface': 'virbr3', 'ipaddr': '2001:db8:ca2:2:1::bd', 'hostname': 'fedora20-test',
'expirytime': 1403738587L, 'prefix': 64, 'clientid': '00:04:b1:d8:86:42:e1:6a:aa:cf:d5:86:94:23:6f:94:04:cd',
'mac': '52:54:00:5b:40:98', 'iaid': '5980312', 'type': 1}]
Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Update the example to be able to trace all events.
* examples/event-test.py (main): Match full list of domain events.
(myDomainEventIOErrorReasonCallback)
(myDomainEventControlErrorCallback)
(myDomainEventBlockJobCallback, myDomainEventBlockJob2Callback)
(blockJobTypeToString, blockJobStatusToString): New functions.
Signed-off-by: Eric Blake <eblake@redhat.com>
Commit 6ea5be0 added network event callback support, so we might
as well demonstrate that it works by updating our example.
* examples/event-test.py: Add network event, fix typos.
Signed-off-by: Eric Blake <eblake@redhat.com>
Strings in python3 default to unicode, so when writing to
the self-pipe we must be sure to use bytes by calling the
encode() method.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
