This patchset can also be found at
https://gitorious.org/~jirka/libvirt/jirka-staging/commits/keepalive
This allows us to detect broken connections between server and client without
waiting for TCP timeout and dead deamon/client. By default a connection is
considered broken after about 30 seconds of no messages received from remote
party. After that period, the connection is automatically closed.
The main reason for implementing this is that peer-to-peer migration can now be
canceled when a connection between source and target breaks. Although this will
really work only after qemu fixes migrate_cancel command so that it doesn't
block when outgoing TCP buffers are full.
Version 3 addresses comments from Daniel (more details can be found in each
patch) except for the default settings on server side. Daniel suggested
keepalive should be switched off by default, while I think it should be on if
possible, but that (and if on, with what interval and count) can be discussed
further since it has negligible impact on the patchset.
Jiri Denemark (13):
Define keepalive protocol
Implement common keepalive handling
Introduce virConnectSetKeepAlive
virsh: Always run event loop
Implement keepalive protocol in libvirt daemon
Add support for non-blocking calls in client RPC
Add support for async close of client RPC socket
Implement keepalive protocol in remote driver
Introduce virConnectIsAlive API
Implement virConnectIsAlive in all drivers
Add keepalive support into domain-events examples
qemu: Add support for keepalive messages during p2p migration
qemu: Cancel p2p migration when connection breaks
.gitignore | 1 +
daemon/libvirtd.aug | 5 +
daemon/libvirtd.c | 15 +
daemon/libvirtd.conf | 22 +
daemon/libvirtd.h | 1 +
daemon/remote.c | 48 +++-
examples/domain-events/events-c/event-test.c | 9 +-
examples/domain-events/events-python/event-test.py | 4 +-
include/libvirt/libvirt.h.in | 5 +
po/POTFILES.in | 1 +
src/Makefile.am | 15 +-
src/driver.h | 8 +
src/esx/esx_driver.c | 18 +
src/hyperv/hyperv_driver.c | 18 +
src/libvirt.c | 90 ++++
src/libvirt_internal.h | 10 +-
src/libvirt_private.syms | 2 +
src/libvirt_public.syms | 2 +
src/libxl/libxl_driver.c | 8 +
src/lxc/lxc_driver.c | 7 +
src/openvz/openvz_driver.c | 7 +
src/phyp/phyp_driver.c | 18 +
src/qemu/libvirtd_qemu.aug | 2 +
src/qemu/qemu.conf | 19 +
src/qemu/qemu_conf.c | 11 +
src/qemu/qemu_conf.h | 3 +
src/qemu/qemu_driver.c | 6 +
src/qemu/qemu_migration.c | 43 ++-
src/qemu/test_libvirtd_qemu.aug | 6 +
src/remote/remote_driver.c | 70 ++++
src/remote/remote_protocol.x | 2 +-
src/rpc/virkeepalive.c | 426 ++++++++++++++++++++
src/rpc/virkeepalive.h | 56 +++
src/rpc/virkeepaliveprotocol.x | 7 +
src/rpc/virnetclient.c | 316 +++++++++++++---
src/rpc/virnetclient.h | 6 +
src/rpc/virnetserver.c | 22 +
src/rpc/virnetserver.h | 5 +
src/rpc/virnetserverclient.c | 143 ++++++-
src/rpc/virnetserverclient.h | 7 +
src/test/test_driver.c | 6 +
src/uml/uml_driver.c | 7 +
src/util/event.c | 6 +-
src/vbox/vbox_tmpl.c | 6 +
src/vmware/vmware_driver.c | 7 +
src/xen/xen_driver.c | 8 +
src/xenapi/xenapi_driver.c | 12 +
tools/console.c | 17 +-
tools/virsh.c | 31 ++
49 files changed, 1477 insertions(+), 87 deletions(-)
create mode 100644 src/rpc/virkeepalive.c
create mode 100644 src/rpc/virkeepalive.h
create mode 100644 src/rpc/virkeepaliveprotocol.x
--
1.7.7
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