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imrj's avatar
imrj
Icon for Nimbostratus rankNimbostratus
Mar 26, 2024

Maintain sticky across tiered VIPs

so I have read some of the documentation but unsure about config,  basically have two web tiers, lets call front and back, which I need to maintain sticky session state thru both VIPs

As in the diagram attached, VIP-A has sticky session on, but I need VIP-B to also keep that same session on the same corresponding back tier server, such that a session that gets persisted to WS1a (by VIP-A) will also get persisted to WS2a (or to WS2b, whichever of the two the initial session was initially setup by VIP-B).....

I believe I have to configure source address affinity persistence with the exact same profile name on both VIPs? this is all HTTP/s traffic, 

 

application delivery

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  • Paulius's avatar
    Paulius
    Icon for MVP rankMVP
    Mar 26, 2024

    I don't believe this is achievable without performing at least SSL termination on both virtual server(VS) A and VS B. If you are performing SSL termination you can create 3 pools, one for VS A with WS1A and WS1B in them, then one with WS2A, and the final pool with only WS2B in it. You can then configure header insertion on VS A and have it insert a header with a value of WS1A for that server or WS1B for that server. On VS B you will have another iRule that searches for the respective HTTP header and then balances that traffic to WS2A if WS1A is found in the header or WS2B if WS2B is found in the header.

    If these VS's are on the same F5s, and WS2A and B are using the same IPs as WS1A and WS1B you can do a match across virtual servers for persistence which should keep A to A and B to B.

  • imrj's avatar
    imrj
    Icon for Nimbostratus rankNimbostratus
    Mar 26, 2024

    good deal, will give that a try in the lab, thank you!