Filter based on condition or watchdog

[Гаврилов Игорь]

Or modify variant with krt_source:
For enable announcing:
 ip route change to AAAA dev lo proto NNN
For disable:
ip route change to AAAA dev lo proto kernel

protocol kernel MAIN{
        persist;
        scan time 20;
        learn;
        import where krt_source = NNN;
        export all;
}

where NNN some unused number in /etc/iproute2/rt_protos

If you don't want to use birdc configure every time.



02.06.2017, 16:54, "Jan Matejka" <jan.matejka at nic.cz>:
> On 06/02/2017 12:59 PM, Войнович Андрей Александрович wrote:
>>  Hi all!
>>
>>  Does BIRD allow to write a filter, where I can define a condition when it should import/export some route(s) and when it should not? To clarify my question, example: I want to check whether some process (lets say apache) is running and the server is listening TCP port 80, so if these conditions are true, BIRD should export some route to OSPF, if false – should not.
>
> No, this is not possible in a simple way.
>
> Anyway, you may use a set of config files like this:
>
> bird.conf:
> ...
> include "apache-check.conf";
> ...
>
> apache-check-yes.conf:
> static apachecheck { route XYZ };
>
> apache-check-no.conf: empty
>
> apache-check.conf: symlink to apache-check-no.conf
>
> write a script like this:
>
> * if the condition is true: ln -sf apache-check-yes.conf apache-check.conf
> * else: ln -sf apache-check-no.conf apache-check.conf
> * if the script changed the symlink, reload bird config
>
> and run the script by cron every other while.
>
> Hope this is clear enough to help you.
> MQ