Is it possible to send information from a single service to all pods in the same cluster at once?
Currently I have a service that transfers messages one by one (Round-Robin). I need a way for it to send all in parallel, multicast.
Thanks.
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Does using a headless service and iterating over returned list of IPs to send requests satisfy your requirement? – Ali Tou Feb 16 '21 at 12:15
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@AliTou Well, I think it is kind of workaround. Iterating over list of IPs is still going one by one. I don't see the solution for simultaneously transferring messages. Correct me if I'm wrong. – jrz Feb 16 '21 at 12:19
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Send a packet with destination mac addres set to FF:FF:FF:FF:FF:FF – Matt Feb 16 '21 at 12:22
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Yes, but you can send them asynchronously and have more control over them than relying on Kubernetes Service load balancing. Think of it as a way to create as many threads as the number of pods, then call them concurrently. I'm just thinking out loud. – Ali Tou Feb 16 '21 at 12:25
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I read on Red Hat site: "If you are using the OVN-Kubernetes default Container Network Interface (CNI) network provider, you can enable multicast on a per-project basis." But not sure wether it forces me to use OCP. https://docs.openshift.com/container-platform/4.4/networking/ovn_kubernetes_network_provider/enabling-multicast.html – jrz Feb 16 '21 at 12:33