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fix snmp emitting empty fields 

closes #1848
closes #1835
This commit is contained in:
Patrick Hemmer 2016-10-04 10:46:01 -04:00 committed by Cameron Sparr
parent 9feb639bbd
commit b48ad4b737
3 changed files with 20 additions and 4 deletions
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1
CHANGELOG.md
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@ -44,6 +44,7 @@
- [#1702](https://github.com/influxdata/telegraf/issues/1702): sqlserver, fix issue when case sensitive collation is activated. - [#1702](https://github.com/influxdata/telegraf/issues/1702): sqlserver, fix issue when case sensitive collation is activated.
- [#1823](https://github.com/influxdata/telegraf/issues/1823): Fix huge allocations in http_listener when dealing with huge payloads. - [#1823](https://github.com/influxdata/telegraf/issues/1823): Fix huge allocations in http_listener when dealing with huge payloads.
- [#1833](https://github.com/influxdata/telegraf/issues/1833): Fix translating SNMP fields not in MIB. - [#1833](https://github.com/influxdata/telegraf/issues/1833): Fix translating SNMP fields not in MIB.
- [#1835](https://github.com/influxdata/telegraf/issues/1835): Fix SNMP emitting empty fields.
## v1.0.1 [unreleased] ## v1.0.1 [unreleased]

10
plugins/inputs/snmp/snmp.go
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@ -460,13 +460,15 @@ func (t Table) Build(gs snmpConnection, walk bool) (*RTable, error) {
// index, and being added on the same row. // index, and being added on the same row.
if pkt, err := gs.Get([]string{oid}); err != nil { if pkt, err := gs.Get([]string{oid}); err != nil {
return nil, Errorf(err, "performing get") return nil, Errorf(err, "performing get")
} else if pkt != nil && len(pkt.Variables) > 0 && pkt.Variables[0].Type != gosnmp.NoSuchObject { } else if pkt != nil && len(pkt.Variables) > 0 && pkt.Variables[0].Type != gosnmp.NoSuchObject && pkt.Variables[0].Type != gosnmp.NoSuchInstance {
ent := pkt.Variables[0] ent := pkt.Variables[0]
fv, err := fieldConvert(f.Conversion, ent.Value) fv, err := fieldConvert(f.Conversion, ent.Value)
if err != nil { if err != nil {
return nil, Errorf(err, "converting %q", ent.Value) return nil, Errorf(err, "converting %q", ent.Value)
} }
ifv[""] = fv if fvs, ok := fv.(string); !ok || fvs != "" {
ifv[""] = fv
}
} }
} else { } else {
err := gs.Walk(oid, func(ent gosnmp.SnmpPDU) error { err := gs.Walk(oid, func(ent gosnmp.SnmpPDU) error {
@ -487,7 +489,9 @@ func (t Table) Build(gs snmpConnection, walk bool) (*RTable, error) {
if err != nil { if err != nil {
return Errorf(err, "converting %q", ent.Value) return Errorf(err, "converting %q", ent.Value)
} }
ifv[idx] = fv if fvs, ok := fv.(string); !ok || fvs != "" {
ifv[idx] = fv
}
return nil return nil
}) })
if err != nil { if err != nil {

13
plugins/inputs/snmp/snmp_test.go
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@ -62,12 +62,15 @@ var tsc = &testSNMPConnection{
values: map[string]interface{}{ values: map[string]interface{}{
".1.0.0.0.1.1.0": "foo", ".1.0.0.0.1.1.0": "foo",
".1.0.0.0.1.1.1": []byte("bar"), ".1.0.0.0.1.1.1": []byte("bar"),
".1.0.0.0.1.1.2": []byte(""),
".1.0.0.0.1.102": "bad", ".1.0.0.0.1.102": "bad",
".1.0.0.0.1.2.0": 1, ".1.0.0.0.1.2.0": 1,
".1.0.0.0.1.2.1": 2, ".1.0.0.0.1.2.1": 2,
".1.0.0.0.1.2.2": 0,
".1.0.0.0.1.3.0": "0.123", ".1.0.0.0.1.3.0": "0.123",
".1.0.0.0.1.3.1": "0.456", ".1.0.0.0.1.3.1": "0.456",
".1.0.0.0.1.3.2": "9.999", ".1.0.0.0.1.3.2": "0.000",
".1.0.0.0.1.3.3": "9.999",
".1.0.0.0.1.4.0": 123456, ".1.0.0.0.1.4.0": 123456,
".1.0.0.1.1": "baz", ".1.0.0.1.1": "baz",
".1.0.0.1.2": 234, ".1.0.0.1.2": 234,
@ -426,6 +429,14 @@ func TestTableBuild_noWalk(t *testing.T) {
Oid: ".1.0.0.1.2", Oid: ".1.0.0.1.2",
IsTag: true, IsTag: true,
}, },
{
Name: "empty",
Oid: ".1.0.0.0.1.1.2",
},
{
Name: "noexist",
Oid: ".1.2.3.4.5",
},
}, },
} }