N:N loadbalancing and failure recovery

Can you please help to see which functions could be used to achieve the above?

 

 

thank you

- each Device needs to be connected to separate server if all 3 servers are healthy

 

- if 1 server fails, particular device will be reconnected to another server so that server will handle 2 TCP connectionsi am thinking to use table and node command i.e. recording client and server mapping in table and using node command to direct traffic to specific server.

 

 

table

 

https://devcentral.f5.com/wiki/irules.table.ashx

 

 

node

 

https://devcentral.f5.com/wiki/iRules.node.ashx

 

 

- after failed server comes back, we need to resume 1:1 situationmay we delete existing connection when server comes back?

 

 

Acton on Log - using the alertd deamon

 

https://devcentral.f5.com/wiki/advdesignconfig.Acton-on-Log-using-the-alertd-deamon.ashx

pj, is this authorisation traffic?

 

 

Nitass, could we not use the CLIENT_DATA event and your table and node suggestion to select each time data is received. If this is (card/payment) authorisation traffic I expect everything for a transaction to be contained in one packet.

H Steve, thi is BCAAA trafic between bluecoat proxy and bcaaa server forwarding NTLM auth requests to DC.

Hi Nittas,

 

yes we need to delete existing conn after server comes back.

 

thanks

OK, so single, long lived connections between one proxy and one server (x3)? No persistence configured?

indeed, no persistence needed since it is only 1 pernament conn per proxy

OK, thanks for the info. I was considering something funky with timeouts and/or priority group activation but after some thought an iRule is probably the best way to go. I'm hoping Nitass will post an example shortly.