Added a configugration option that instructs GoSNMP to allow a set of…

… OIDs that aren't in a strictly increasing order. (prometheus#759)

Signed-off-by: Matti Saarinen <[email protected]>

collector/collector.go

@@ -126,6 +126,12 @@ func ScrapeTarget(ctx context.Context, target string, config *config.Module, log
 	snmp.UseUnconnectedUDPSocket = config.WalkParams.UseUnconnectedUDPSocket
 	snmp.LocalAddr = *srcAddress
 
+	// Allow a set of OIDs that aren't in a strictly increasing order
+	if config.WalkParams.AllowNonIncreasingOIDs {
+		snmp.AppOpts = make(map[string]interface{})
+		snmp.AppOpts["c"] = true
+	}
+
 	var sent time.Time
 	snmp.OnSent = func(x *gosnmp.GoSNMP) {
 		sent = time.Now()

config/config.go

@@ -50,6 +50,7 @@ var (
 		Timeout:                 time.Second * 5,
 		Auth:                    DefaultAuth,
 		UseUnconnectedUDPSocket: false,
+		AllowNonIncreasingOIDs:  false,
 	}
 	DefaultModule = Module{
 		WalkParams: DefaultWalkParams,
@@ -69,6 +70,7 @@ type WalkParams struct {
 	Timeout                 time.Duration `yaml:"timeout,omitempty"`
 	Auth                    Auth          `yaml:"auth,omitempty"`
 	UseUnconnectedUDPSocket bool          `yaml:"use_unconnected_udp_socket,omitempty"`
+	AllowNonIncreasingOIDs  bool          `yaml:"allow_nonincreasing_oids,omitempty"`
 }
 
 type Module struct {