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Hi --
It is a tribute to lvs that I've forgotten most of what I once knew
about it, because I set up LVS-DR with keepalived about three years
ago and it has run without a hiccup ever since. As a result, I'm
rusty, so forgive me if this is a stupid or frequently asked question.
How should I go about taking a server temporarily out of rotation?
Since I am using keepalived, I know I can simply turn off the service
it depends on -- but in fact I want to replace that service with a new
application on the same port (which will go live a few minutes/hours
later). I am aware of some alternatives:
* configure keepalived's health check to rely on some aspect on the
old application,
then swap the configuration when I want to go live with the new
application.
* temporarily run the new application on a different ip.
* simply comment out that realserver in keepalived.conf temporarily,
or add a healthcheck
that will never be satisfied.
* directly delete the ipvsadm config for that server (but what about
the backup director, and
how if at all will keepalived interfere with that?)
* get a job more suitable for a dim-witted person like myself.
But all these are workarounds; what I really want is to tell the
director (or keepalived), "retain all configuration, but temporarily
drop this realserver until I remove the block". Is there a way to do
that?
Cheers,
Jacob Smullyan
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