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TCP listener for NLB heartbeats #459

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jvehent opened this issue Mar 23, 2020 · 3 comments
Open

TCP listener for NLB heartbeats #459

jvehent opened this issue Mar 23, 2020 · 3 comments

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@jvehent
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jvehent commented Mar 23, 2020

Expose a TCP listener that follows the HTTP heartbeat and fails when autograph is unhealthy, so that TCP load balancers like AWS NLB.
@jvehent jvehent self-assigned this Mar 23, 2020
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jvehent commented Mar 23, 2020

@Micheletto What's the spec for the tcp listener? does it just need to negotiate a SYN/SYNACK/ACK, or is the NLB expecting a specific payload too?

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jvehent commented Mar 23, 2020

ah! A TCP health check succeeds if the TCP connection succeeds.
https://docs.aws.amazon.com/elasticloadbalancing/latest/classic/elb-healthchecks.html

@jvehent jvehent mentioned this issue Mar 23, 2020
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jvehent commented Mar 26, 2020

We're pausing on this until @Micheletto has had a chance to test out the SSL NLB.

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tcp healthcheck initial prototype mozilla-services/autograph
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