Hello, I am setting up a high-availablilty kamailio system using UCARP to failover between active and standby instances. To detect failure, we intend to use Monit. Monit can monitor the kamailio PID and start the process when needed (Example on the wiki http://www.kamailio.org/dokuwiki/doku.php/install:configure-initd-script) and it can also do OPTIONS pings to verify it is working. If the pings fail we will initiate a ucarp swap.
However if the server is currently in standby, it does not have the V-IP address, so I don't want to run the OPTIONS pings (I think).
Does anyone use a similar system and can provide an example of how ucarp, monit and kamailio can work together?
Many thanks,
Hugh Waite
Am 16.02.2011 11:48, schrieb Hugh Waite:
Hello, I am setting up a high-availablilty kamailio system using UCARP to failover between active and standby instances. To detect failure, we intend to use Monit. Monit can monitor the kamailio PID and start the process when needed (Example on the wiki http://www.kamailio.org/dokuwiki/doku.php/install:configure-initd-script) and it can also do OPTIONS pings to verify it is working. If the pings fail we will initiate a ucarp swap.
However if the server is currently in standby, it does not have the V-IP address, so I don't want to run the OPTIONS pings (I think).
So, do not monitor a service which is not running.
Such things are usually done by a cluster resource manager (like pacemaker).
regards klaus
Hi,
I have built a similar solution with only one difference: I am using HEARTBEAT instead of ucarp. In heartbeat it is possible moving "haresources" from one active host to another. So, I activate MONIT (and mysql + kamailio) only when the resources (e.g. virtual IP address) are switched from one host to the other.
A sample config of heartbeat looks like:
[...] Srv1 drbddisk::dbdata \ Filesystem::/dev/drbd0::/mnt/drbdfiles::ext3 \ 10.0.0.1 mysql kamailio start-monit [...]
Maybe you can use a pendant to these 'resources' in ucarp, too. I do not know any details.
regard, Klaus
Hello, I am setting up a high-availablilty kamailio system using UCARP to failover between active and standby instances. To detect failure, we intend to use Monit. Monit can monitor the kamailio PID and start the process when needed (Example on the wiki http://www.kamailio.org/dokuwiki/doku.php/install:configure-initd-script) and it can also do OPTIONS pings to verify it is working. If the pings fail we will initiate a ucarp swap.
However if the server is currently in standby, it does not have the V-IP address, so I don't want to run the OPTIONS pings (I think).
Does anyone use a similar system and can provide an example of how ucarp, monit and kamailio can work together?
Many thanks,
Hugh Waite
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
An option is to use in the UCARP VIP up/down scripts the commands:
monit start kamailio monit stop kamailio
Then monit will stop kamailio and no longer do options ping when the server is standby.
Cheers, Daniel
On 2/17/11 2:05 PM, Klaus Feichtinger wrote:
Hi,
I have built a similar solution with only one difference: I am using HEARTBEAT instead of ucarp. In heartbeat it is possible moving "haresources" from one active host to another. So, I activate MONIT (and mysql + kamailio) only when the resources (e.g. virtual IP address) are switched from one host to the other.
A sample config of heartbeat looks like:
[...] Srv1 drbddisk::dbdata \ Filesystem::/dev/drbd0::/mnt/drbdfiles::ext3 \ 10.0.0.1 mysql kamailio start-monit [...]
Maybe you can use a pendant to these 'resources' in ucarp, too. I do not know any details.
regard, Klaus
Hello, I am setting up a high-availablilty kamailio system using UCARP to failover between active and standby instances. To detect failure, we intend to use Monit. Monit can monitor the kamailio PID and start the process when needed (Example on the wiki http://www.kamailio.org/dokuwiki/doku.php/install:configure-initd-script) and it can also do OPTIONS pings to verify it is working. If the pings fail we will initiate a ucarp swap.
However if the server is currently in standby, it does not have the V-IP address, so I don't want to run the OPTIONS pings (I think).
Does anyone use a similar system and can provide an example of how ucarp, monit and kamailio can work together?
Many thanks,
Hugh Waite
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
Thanks for the responses,
We wish the server to be a hot standby, so the kamailio service is running and is ready to take traffic as soon as the virtual IP is assigned. Kamailio is bound to a fixed IP and DNAT/SNAT is used to convert the IP of incoming traffic. Monit is there to make sure that it is running and will alert a network admin if the standby is not ready to take over. Since my original post, I think it is acceptable for us to send OPTIONS pings to localhost to check for responsiveness and therefore this check does not need to be turned off when standby. It will continue as an additional check that the standby instance is ready to take over when needed.
Regards, Hugh
On 17/02/2011 13:53, Daniel-Constantin Mierla wrote:
An option is to use in the UCARP VIP up/down scripts the commands:
monit start kamailio monit stop kamailio
Then monit will stop kamailio and no longer do options ping when the server is standby.
Cheers, Daniel
On 2/17/11 2:05 PM, Klaus Feichtinger wrote:
Hi,
I have built a similar solution with only one difference: I am using HEARTBEAT instead of ucarp. In heartbeat it is possible moving "haresources" from one active host to another. So, I activate MONIT (and mysql + kamailio) only when the resources (e.g. virtual IP address) are switched from one host to the other.
A sample config of heartbeat looks like:
[...] Srv1 drbddisk::dbdata \ Filesystem::/dev/drbd0::/mnt/drbdfiles::ext3 \ 10.0.0.1 mysql kamailio start-monit [...]
Maybe you can use a pendant to these 'resources' in ucarp, too. I do not know any details.
regard, Klaus
Hello, I am setting up a high-availablilty kamailio system using UCARP to failover between active and standby instances. To detect failure, we intend to use Monit. Monit can monitor the kamailio PID and start the process when needed (Example on the wiki http://www.kamailio.org/dokuwiki/doku.php/install:configure-initd-script)
and it can also do OPTIONS pings to verify it is working. If the pings fail we will initiate a ucarp swap.
However if the server is currently in standby, it does not have the V-IP address, so I don't want to run the OPTIONS pings (I think).
Does anyone use a similar system and can provide an example of how ucarp, monit and kamailio can work together?
Many thanks,
Hugh Waite
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
AFAIK the current "Linux approach" (RedHat, Suse) it to use pacemaker+corosync and OCF resource scripts.
Pacemaker is the cluster resource manager: control all resources and monitors services by usage of the OCF scripts
Corosync provides the cluster communication: communication between the various pacemaker instances
the OCF resource script provides means to start/stop and monitor the service.
regards Klaus
On 17.02.2011 14:05, Klaus Feichtinger wrote:
Hi,
I have built a similar solution with only one difference: I am using HEARTBEAT instead of ucarp. In heartbeat it is possible moving "haresources" from one active host to another. So, I activate MONIT (and mysql + kamailio) only when the resources (e.g. virtual IP address) are switched from one host to the other.
A sample config of heartbeat looks like:
[...] Srv1 drbddisk::dbdata \ Filesystem::/dev/drbd0::/mnt/drbdfiles::ext3 \ 10.0.0.1 mysql kamailio start-monit [...]
Maybe you can use a pendant to these 'resources' in ucarp, too. I do not know any details.
regard, Klaus
Hello, I am setting up a high-availablilty kamailio system using UCARP to failover between active and standby instances. To detect failure, we intend to use Monit. Monit can monitor the kamailio PID and start the process when needed (Example on the wiki http://www.kamailio.org/dokuwiki/doku.php/install:configure-initd-script) and it can also do OPTIONS pings to verify it is working. If the pings fail we will initiate a ucarp swap.
However if the server is currently in standby, it does not have the V-IP address, so I don't want to run the OPTIONS pings (I think).
Does anyone use a similar system and can provide an example of how ucarp, monit and kamailio can work together?
Many thanks,
Hugh Waite
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list sr-users@lists.sip-router.org http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
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Daniel-Constantin Mierla -
Hugh Waite -
Klaus Darilion -
Klaus Feichtinger