8bcf1a74a9
This gets a number of improvements: * Fixed a missing case where gossip would stop flowing to dead nodes for a short while. * Uses the go-sockaddr library to look for private IP addresses, which prefers non-loopback private addresses over loopback ones when trying to automatically determine the advertise address. * Properly seeds Go's random number generator using the seed library. * Serf snapshots no longer have the executable bit set on thie file.
1.5 KiB
seed - Quickly Seed Go's Random Number Generator
Boiler-plate to securely seed Go's
random number generator (if possible). This library isn't anything fancy, it's
just a canonical way of seeding Go's random number generator. Cribbed from
Nomad
before it was moved into
Consul
and made into a helper function, and now further modularized to be a super
lightweight and reusable library.
Time is better than
Go's default seed of 1, but friends
don't let friends use time as a seed to a random number generator. Use
seed.MustInit() instead.
seed.Init() is an idempotent and reentrant call that will return an error if
it can't seed the value the first time it is called. Init() is reentrant.
seed.MustInit() is idempotent and reentrant call that will panic() if it
can't seed the value the first time it is called. MustInit() is reentrant.
Usage
package mypackage
import (
"github.com/sean-/seed"
)
// MustInit will panic() if it is unable to set a high-entropy random seed:
func init() {
seed.MustInit()
}
// Or if you want to not panic() and can actually handle this error:
func init() {
if ok, err := !seed.Init(); !ok {
// Handle the error
//panic(fmt.Sprintf("Unable to securely seed Go's RNG: %v", err))
}
}