19 Dec
2006
19 Dec
'06
6:51 p.m.
Thanks Christian,
I believe this will be very useful. We already use monit for other
tasks so it makes sense.
I just want to get some opinions if it will be useful for others if
this was implemented in the openser logic also. Maybe a config
parameter saying "ignore db connection errors on startup", so people
can decide whether they want this behavior or prefer openser to die
upon no db.
Best,
Dimo
On 12/18/06, Christian Schlatter <cs(a)unc.edu> wrote:
Dimo wrote:
Hi,
It works great, thanks!
Now that there is hot reconnect is there a possiblity to make ser
start without a database running? I am thinking about a scenario where
there is a network loss and my redundant opensers are restarting and
the database is restarting too but with some lag. In this scenario at
the moment of openser starting, the db is unavailable but it comes up
in 1-2 seconds after that. I guess hot reconnect will make things work
so there will not be the need to have the database online at the
moment of starting openser.
At present i cannot make ser start if there is a module requiring a db
and the db server is down.
I had the same issue and solved it by using one of those process
monitoring tools. In particular I'm using the monit tool that tries to
start the openser process(es) several times at a given interval. So if
for some reason the DB, in my case mysql-cluster, is not ready, monit
will wait a minute and try to start openser again. After a complete
cluster shutdown it normally takes quite a while for the cluster to come
up again.
This is how my monitrc looks like:
set logfile syslog facility log_daemon
set httpd port 888
ssl enable
pemfile /etc/monit/monit.pem
allow rtc:"xxx"
check process openser with pidfile /var/run/openser/openser.pid
start program = "/etc/init.d/openser start"
stop program = "/etc/init.d/openser stop"
if 3 restarts within 4 cycles then timeout
group sipserver
check process mediaproxy with pidfile /var/run/mediaproxy.pid
start program = "/etc/init.d/mediaproxy start"
stop program = "/etc/init.d/mediaproxy stop"
if 3 restarts within 4 cycles then timeout
group sipserver
check process ami_proxy with pidfile /var/run/ami_proxy.pl.pid
start program = "/etc/init.d/ami_proxy start"
stop program = "/etc/init.d/ami_proxy stop"
if 3 restarts within 4 cycles then timeout
group sipserver
check process mysqld with pidfile /var/run/mysqld/mysqld.pid
group database
- Christian
Best,
Dimo
On 12/12/06, Bogdan-Andrei Iancu <bogdan(a)voice-system.ro> wrote:
Hi Dimo,
yes, there is a mechanism for hot reconnect to the mysql server. By
default it is turned on.
see:
http://www.openser.org/docs/modules/1.2.x/mysql.html#AEN68
regards,
bogdan
Dimo wrote:
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I have a problem with openser reconnecting to my redundant mysql
servers which hold the openser database.
The database servers are in a cluster and if one fails the other takes
over its IP address.
In openser however the connection to the database is established only
(i think) at the beginning.
So when openser is running and one of my sql servers drops, and the
other takes over the IP, i get an error in openser saying that the
mysql connection does not exist.
Is there a way to make openser reconnect to mysql automatically
without restarting it or some other way I can make this work?
Best,
Dimo
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