On 12.07.2013 17:38, Daniel P. Berrange wrote:
> From: "Daniel P. Berrange" <berrange@xxxxxxxxxx>
>
> Systemd has a concept of socket activation whereby systemd
> will listen on a TCP socket in the host. When a client arrives
> on the socket, systemd will run a service, passing it the
> pre-opened TCP server socket. The service can then accept the
> client connection.
>
> This patch series adds the ability to pass pre-opened file
> descriptors into LXC guests. The file descriptors will be
> made available to the 'init' process in the container,
> starting from STDERR_FILENO + 1.
>
> For example, assuming you have pre-opened a file descriptors
> in your shell
>
> # exec 10>/tmp/foo
> # exec 20>/tmp/bar
> # exec 30>/tmp/wizz
>
> You can then start a container with:
>
> # virsh -c lxc:/// start --pass-fds 10,20,30 demo
>
> Inside that container the FDs will appear as 3, 4, 5:
>
> # virsh -c lxc:/// console demo
> Connected to domain demo
> Escape character is ^]
> sh-4.2# lsof -p 1 | grep /tmp
> sh 1 root 3w REG 0,32 0 90226444 /tmp/foo
> sh 1 root 4w REG 0,32 0 90238163 /tmp/bar
> sh 1 root 5w REG 0,32 0 90238164 /tmp/wizz
>
> Finally, if you run systemd inside the container, it can then
> use these pre-opened file descriptors, passing them along when
> launching services inside the container. So you have end-to-end
> socket activation between the host & guest systemd instances.
>
> Daniel P. Berrange (6):
> Introduce new domain create APIs to pass pre-opened FDs to LXC
> Introduce remote protocol support for virDomainCreate{XML}WithFiles
> Fix impl of virDomainCreateWithFlags remote client helper
> LXC: Wire up the virDomainCreate{XML}WithFiles methods
> Enable FD passing when starting guests with virsh
> Merge virCommandPreserveFD / virCommandTransferFD
>
> daemon/remote.c | 104 ++++++++++++++++++++++
> include/libvirt/libvirt.h.in | 10 +++
> python/generator.py | 3 +
> python/libvirt-override-virConnect.py | 30 +++++++
> python/libvirt-override-virDomain.py | 38 ++++++++
> python/libvirt-override.c | 89 +++++++++++++++++++
> src/driver.h | 13 +++
> src/fdstream.c | 3 +-
> src/libvirt.c | 154 ++++++++++++++++++++++++++++++++
> src/libvirt_private.syms | 3 +-
> src/libvirt_public.syms | 6 ++
> src/lxc/lxc_container.c | 136 ++++++++++++++++++++++-------
> src/lxc/lxc_container.h | 6 +-
> src/lxc/lxc_controller.c | 36 +++++++-
> src/lxc/lxc_driver.c | 45 ++++++++--
> src/lxc/lxc_process.c | 20 ++++-
> src/lxc/lxc_process.h | 1 +
> src/qemu/qemu_command.c | 16 ++--
> src/remote/remote_driver.c | 91 +++++++++++++++----
> src/remote/remote_protocol.x | 32 ++++++-
> src/remote_protocol-structs | 16 ++++
> src/uml/uml_conf.c | 3 +-
> src/util/vircommand.c | 159 ++++++++++++++++------------------
> src/util/vircommand.h | 13 +--
> tests/commandtest.c | 5 +-
> tools/virsh-domain.c | 82 +++++++++++++++++-
> tools/virsh.pod | 13 ++-
> 27 files changed, 960 insertions(+), 167 deletions(-)
>
I've pointed out some small issues that I believe you can fix without me
needing to see a v2.
ACK series.
Michal
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