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Re: Setting up an email alert with LVS

To: gonzalo@xxxxxxxxxxxx
Subject: Re: Setting up an email alert with LVS
Cc: lvs-users@xxxxxxxxxxxxxxxxxxxxxx
From: "Alexandre CASSEN" <alexandre.cassen@xxxxxxxxxxxxxx>
Date: Fri, 16 Nov 2001 11:52:41 +0100
Re Gonzalo,

>What do you mean by Synchronization? What needs to be synchronized?

In a first use keepalived is a healthchecker, monitoring and managing the
LVS topologu dynamically (using keepalive method like HTTP_GET, TCP_CHECK,
...).

But you can use keepalived for monitoring LVS director himself (in the next
keepalived I am working on... code done, just documenting). So you add 2
LVS directors so if LVS director 1 fails , LVS director 2 takeover
imediatly. To perform that, keepalived implement the VRRP protocol. Then
keepalived use VRRP VIP as LVS VIP, that way both director can monitor each
other... I am documenting that to handle a quick start use/understanding.

=> The implementation handle syncrhonization circuit between VRRP instance,
...

=> Even you can use both keepalived functionnalities in the same keepalived
instance.


Will publish it this week end...

Best regards,
Alexandre




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