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Add --collector.netdev.device-whitelist flag (#1279)

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* Add --collector.netdev.device-whitelist flag

Sometimes it is desired to monitor only one netdev. The golang regexp
does not support a negated regex, so the ignored-devices flag is too
cumbersome for this task.
This change introduces a new flag: accept-devices, which is mutually
exclusive to ignored-devices. This flag allows specifying ONLY the
netdev you'd like.

Signed-off-by: Noam Meltzer <noam@cynerio.co>
This commit is contained in:
Noam Meltzer 2019-05-31 18:55:50 +03:00 • committed by Ben Kochie
commit 501ccf9fb4
7 changed files with 72 additions and 16 deletions
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8
collector/netdev_openbsd.go
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@ -31,7 +31,7 @@ import (
*/
import "C"
func getNetDevStats(ignore *regexp.Regexp) (map[string]map[string]string, error) {
func getNetDevStats(ignore *regexp.Regexp, accept *regexp.Regexp) (map[string]map[string]string, error) {
netDev := map[string]map[string]string{}
var ifap, ifa *C.struct_ifaddrs
@ -43,7 +43,11 @@ func getNetDevStats(ignore *regexp.Regexp) (map[string]map[string]string, error)
for ifa = ifap; ifa != nil; ifa = ifa.ifa_next {
if ifa.ifa_addr.sa_family == C.AF_LINK {
dev := C.GoString(ifa.ifa_name)
if ignore.MatchString(dev) {
if ignore != nil && ignore.MatchString(dev) {
log.Debugf("Ignoring device: %s", dev)
continue
}
if accept != nil && !accept.MatchString(dev) {
log.Debugf("Ignoring device: %s", dev)
continue
}