Re: [libvirt] [PATCH 4/7] lxc: Improve guest startup error reporting

Add a simple handshake with the lxc_controller process so we can detect process startup failures. We do this by adding a new --handshake cli arg to lxc_controller for passing a file descriptor. If the process fails to launch, we scrape all output from the logfile and report it to the user. Signed-off-by: Cole Robinson <crobinso(a)redhat.com&gt; --- src/lxc/lxc_container.c | 2 +- src/lxc/lxc_container.h | 1 + src/lxc/lxc_controller.c | 33 +++++++++++++- src/lxc/lxc_driver.c | 107 +++++++++++++++++++++++++++++++++++++++++++++- 4 files changed, 137 insertions(+), 6 deletions(-)

@@ -1489,6 +1572,12 @@ static int lxcVmStart(virConnectPtr conn, if (virCommandRun(cmd, NULL) < 0) goto cleanup; + if (VIR_CLOSE(handshakefds[1]) < 0) { + virReportSystemError(errno, "%s", _("could not close handshake fd")); + goto cleanup; + } + handshakefds[1] = -1;