Add metric node_ndisc_entries - #3787
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Adds node_ndisc_entries metric equivalent to node_arp_entries. Enables tracking the number of ndisc entries on IPv6 systems. Signed-off-by: Mikkel Oscar Lyderik Larsen <mikkel.larsen@zalando.de>
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This adds a new metric
node_ndisc_entriesto track the number of IPv6 neighbor discovery entries on the system. This is the IPv6 equivalent ofnode_arp_entriesalready supported by node_exporterThe motivation for this is to be able to track entries and alert on saturation in Kubernetes IPv6 environments.