Start system with 'downed' carp interfaces

[Max Laier]

On Thursday 05 October 2006 13:58, Ulrich Spoerlein wrote:
> Hello,
>
> I'm looking for a generic way to create and configure carp interfaces
> upon boot (so daemons can bind against the IP address), but keep the
> carp interfaces 'down'.
>
> This is to allow the administrator to first check every service after
> the failure, and if deemed ready, put the system back into production
> by simply issuing: ifconfig carp0 up

Can't you just use a high value for advskew so it won't become MASTER 
unless all other hosts are dead as well.

> But there are several problems:
> ifconfig_carp0="foo bar"
> will always "up" the interface first via /etc/rc.d/netif
> ifconfig carp0 foo bar down
> will ignore the 'down' and up the interface. This is especially
> announing. I wish ifconfig would honour the down statement, even
> though the manpage says the interface will always be brought up when
> assigned its first address.
>
> Using a start_if.carp0 with the following contents
> ifconfig carp0 vhid 1 1.2.3.4/24
> ifconfig carp0 down
>
> and
> ifconfig_carp0="down" in rc.conf will result in an 'up' interface. I
> also disabled devd, as it seems to be running pccard_ether carp0 start
> as a result of the interface creation. Although it is started
> sometime after the interface has been created.
>
> How are other people handling the startup of carp interfaces?

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