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Introduce new domain create APIs to pass pre-opened FDs to LXC

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With container based virt, it is useful to be able to pass
pre-opened file descriptors to the container init process.
This allows for containers to be auto-activated from incoming
socket connections, passing the active socket into the container.

To do this, introduce a pair of new APIs, virDomainCreateXMLWithFiles
and virDomainCreateWithFiles, which accept an array of file
descriptors. For the LXC driver, UNIX file descriptor passing
will be used to send them to libvirtd, which will them pass
them down to libvirt_lxc, which will then pass them to the container
init process.

This will only be implemented for LXC right now, but the design
is generic enough it could work with other hypervisors, hence
I suggest adding this to libvirt.so, rather than libvirt-lxc.so

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
This commit is contained in:
Daniel P. Berrange
2013-07-09 17:12:38 +01:00
parent f8bc3a9ccc
commit 03e7cacfa2
4 changed files with 160 additions and 0 deletions
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3
generator.py
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@ -513,6 +513,9 @@ skip_function = (
'virConnectUnregisterCloseCallback', # overriden in virConnect.py
'virConnectRegisterCloseCallback', # overriden in virConnect.py
'virDomainCreateXMLWithFiles', # overriden in virConnect.py
'virDomainCreateWithFiles', # overriden in virDomain.py
# 'Ref' functions have no use for bindings users.
"virConnectRef",
"virDomainRef",