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netclass: retrieve interface names and filter before parsing 

We should filter excluded interfaces before parsing the interface
details.
This change is based on https://github.com/prometheus/procfs/pull/376

Signed-off-by: Jan Fajerski <jfajersk@redhat.com>
This commit is contained in:
Jan Fajerski 2021-04-19 16:21:06 +02:00
parent 90d469805a
commit e656b79297
1 changed files with 9 additions and 3 deletions
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12
collector/netclass_linux.go
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@ -183,15 +183,21 @@ func pushMetric(ch chan<- prometheus.Metric, subsystem string, name string, valu
}
func (c *netClassCollector) getNetClassInfo() (sysfs.NetClass, error) {
netClass, err := c.fs.NetClass()
netClass := sysfs.NetClass{}
netDevices, err := c.fs.NetClassDevices()
if err != nil {
return netClass, err
}
for device := range netClass {
for _, device := range netDevices {
if c.ignoredDevicesPattern.MatchString(device) {
delete(netClass, device)
continue
}
interfaceClass, err := c.fs.NetClassByIface(device)
if err != nil {
return netClass, err
}
netClass[device] = *interfaceClass
}
return netClass, nil