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Add the script hook support to the libvirt daemon

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It supports 3 kind of probing times, at daemon startup, when the
daemon reloads its drivers on SIGHUP and when the daemon exits

* daemon/libvirtd.c: daemon hooks for startup, reload and exit
This commit is contained in:
Daniel Veillard 2010-03-26 15:53:32 +01:00
parent 2b4e353168
commit 53456e62ed
1 changed files with 24 additions and 1 deletions
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25
daemon/libvirtd.c
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@ -62,6 +62,7 @@
#include "event.h"
#include "memory.h"
#include "stream.h"
#include "hooks.h"
#ifdef HAVE_AVAHI
# include "mdns.h"
#endif
@ -199,6 +200,7 @@ enum {
VIR_DAEMON_ERR_PRIVS,
VIR_DAEMON_ERR_NETWORK,
VIR_DAEMON_ERR_CONFIG,
VIR_DAEMON_ERR_HOOKS,
VIR_DAEMON_ERR_LAST
};
@ -212,7 +214,8 @@ VIR_ENUM_IMPL(virDaemonErr, VIR_DAEMON_ERR_LAST,
"Unable to setup signal handlers",
"Unable to drop privileges",
"Unable to initialize network sockets",
"Unable to load configuration file")
"Unable to load configuration file",
"Unable to look for hook scripts")
static void sig_handler(int sig, siginfo_t * siginfo,
void* context ATTRIBUTE_UNUSED) {
@ -378,8 +381,11 @@ qemudDispatchSignalEvent(int watch ATTRIBUTE_UNUSED,
switch (siginfo.si_signo) {
case SIGHUP:
VIR_INFO0(_("Reloading configuration on SIGHUP"));
virHookCall(VIR_HOOK_DRIVER_DAEMON, "-",
VIR_HOOK_DAEMON_OP_RELOAD, SIGHUP, "SIGHUP", NULL);
if (virStateReload() < 0)
VIR_WARN0(_("Error while reloading drivers"));
break;
case SIGINT:
@ -3143,9 +3149,23 @@ int main(int argc, char **argv) {
goto error;
}
/* setup the hooks if any */
if (virHookInitialize()) {
ret = VIR_DAEMON_ERR_HOOKS;
goto error;
}
/* Disable error func, now logging is setup */
virSetErrorFunc(NULL, virshErrorHandler);
/*
* Call the daemon startup hook
* TODO: should we abort the daemon startup if the script returned
* an error ?
*/
virHookCall(VIR_HOOK_DRIVER_DAEMON, "-", VIR_HOOK_DAEMON_OP_START,
0, "start", NULL);
if (qemudNetworkInit(server) < 0) {
ret = VIR_DAEMON_ERR_NETWORK;
goto error;
@ -3206,6 +3226,9 @@ shutdown:
}
pthread_join(server->eventThread, NULL);
virHookCall(VIR_HOOK_DRIVER_DAEMON, "-", VIR_HOOK_DAEMON_OP_SHUTDOWN,
0, "shutdown", NULL);
error:
if (statuswrite != -1) {
if (ret != 0) {