app

func NewRootCommand ¶

func NewRootCommand(sds istioagent.SDSServiceFactory) *cobra.Command

func RaiseFileLimits ¶

func RaiseFileLimits() (uint64, error)

RaiseFileLimits sets the file limit to the maximum allowed, to avoid exhaustion of file descriptors. This is done by setting soft limit == hard limit. Typical container runtimes already do this, but on VMs, etc this is generally not the case, and a limit of 1024 is common -- this is quite low!

Go already sets this (https://github.com/golang/go/issues/46279). However, it will restore the original limit for subprocesses (Envoy): https://github.com/golang/go/blob/f0d1195e13e06acdf8999188decc63306f9903f5/src/syscall/rlimit.go#L14. By explicitly doing it ourselves, we get the limit passed through to Envoy.

This function returns the new limit additionally, for convenience.