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HTTP: Stop accepting requests on final system shutdown.

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There are three CLI commands to stop and restart Asterisk each.

1) core stop/restart now - Hangup all calls and stop or restart Asterisk.
New channels are prevented while the shutdown request is pending.

2) core stop/restart gracefully - Stop or restart Asterisk when there are
no calls remaining in the system.  New channels are prevented while the
shutdown request is pending.

3) core stop/restart when convenient - Stop or restart Asterisk when there
are no calls in the system.  New calls are not prevented while the
shutdown request is pending.

ARI has made stopping/restarting Asterisk more problematic.  While a
shutdown request is pending it is desirable to continue to process ARI
HTTP requests for current calls.  To handle the current calls while a
shutdown request is pending, a new committed to shutdown phase is needed
so ARI applications can deal with the calls until the system is fully
committed to shutdown.

* Added a new shutdown committed phase so ARI applications can deal with
calls until the final committed to shutdown phase is reached.

* Made refuse new HTTP requests when the system has reached the final
system shutdown phase.  Starting anything while the system is actively
releasing resources and unloading modules is not a good thing.

* Split the bridging framework shutdown to not cleanup the global bridging
containers when shutting down in a hurry.  This is similar to how other
modules prevent crashes on rapid system shutdown.

* Moved ast_begin_shutdown(), ast_cancel_shutdown(), and
ast_shutting_down().  You should not have to include channel.h just to
access these system functions.

ASTERISK-24752 #close
Reported by: Matthew Jordan

Review: https://reviewboard.asterisk.org/r/4399/


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/13@431692 65c4cc65-6c06-0410-ace0-fbb531ad65f3
This commit is contained in:
Richard Mudgett
2015-02-11 17:28:13 +00:00
parent 29f3ff0b61
commit feddab7944
10 changed files with 214 additions and 70 deletions
Download Patch File Download Diff File Expand all files Collapse all files

23
main/channel.c
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@@ -100,9 +100,6 @@ struct ast_epoll_data {
#define MONITOR_DELAY 150 * 8 /*!< 150 ms of MONITORING DELAY */
#endif
/*! \brief Prevent new channel allocation if shutting down. */
static int shutting_down;
static int chancount;
unsigned long global_fin, global_fout;
@@ -504,13 +501,9 @@ static int ast_channel_softhangup_cb(void *obj, void *arg, int flags)
return 0;
}
void ast_begin_shutdown(int hangup)
void ast_softhangup_all(void)
{
shutting_down = 1;
if (hangup) {
ao2_callback(channels, OBJ_NODATA | OBJ_MULTIPLE, ast_channel_softhangup_cb, NULL);
}
ao2_callback(channels, OBJ_NODATA | OBJ_MULTIPLE, ast_channel_softhangup_cb, NULL);
}
/*! \brief returns number of active/allocated channels */
@@ -524,18 +517,6 @@ int ast_undestroyed_channels(void)
return ast_atomic_fetchadd_int(&chancount, 0);
}
/*! \brief Cancel a shutdown in progress */
void ast_cancel_shutdown(void)
{
shutting_down = 0;
}
/*! \brief Returns non-zero if Asterisk is being shut down */
int ast_shutting_down(void)
{
return shutting_down;
}
/*! \brief Set when to hangup channel */
void ast_channel_setwhentohangup_tv(struct ast_channel *chan, struct timeval offset)
{