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NIOS DNS DHCP IPAM

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Healthcheck on LBDN different from Pool (members)

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Hey Everyone,

 

I'm attempting to setup some DTC records but am stumped how to acheive a desired Healthcheck config.

 

== The big picture

We have some 'on-prem cloud' services (Kubernetes, et.al) which host some foundational services. We want to use IB DTC to provide the ext. loadbalancer work so clients can hit an appropriate node.

 

== The problem

Some of the native k8s services are running as a daemonset (on all hosts) which is an easy target to gauge a hosts liveness (keeping a DTC record active for this node) but it's not good enough for service readiness. In a shared service env. like K8s some workloads are only active on a subset of the entire pool members. If these workloads are not HTTP/HTTPS most of the time you have a single port open per pool member which listens for traffic. Since the healthcheck configuration is at the pool level I cannot align the LDBN patterns on routing to specific nodes with the workload running on them.

 

== Desired solution

Unless I missed something (... entirely possible), I'd really like the ability to define healthchecks at the ldbn / pattern level. This would allow me to use hosts as shared resources with dynamic routing needs.

 

-J

 

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