consul/agent/config/agent_limits.go

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package config
import (
"fmt"
)
// checkLimitsFromMaxConnsPerClient check that value provided might be OK
// return an error if values are not compatible
func checkLimitsFromMaxConnsPerClient(maxConnsPerClient int) error {
maxFds, err := getrlimit()
if err == nil && maxConnsPerClient > 0 {
// We need the list port + a few at the minimum
// On Mac OS, 20 FDs are open by Consul without doing anything
requiredFds := uint64(maxConnsPerClient + 20)
if maxFds < requiredFds {
return fmt.Errorf("system allows a max of %d file descriptors, but limits.http_max_conns_per_client: %d needs at least %d", maxFds, maxConnsPerClient, requiredFds)
}
}
return err
}