SNMP + Telegraf + InfluxDB

First, install telegraf from github with the branch to fix-snmp-not-in-mib branch, that solves the issue #1833

git clone -b fix-snmp-not-in-mib --single-branch https://github.com/phemmer/telegraf.git

After, I searched all MIB about an specific interface through bash language:

IFACE="enp3s0"
ID=`snmpwalk -v2c -c public localhost | grep "ifName.*STRING: $IFACE" | sed 's/\./ /g' | tail -n1 | awk '{print $2}'`
snmpwalk -v2c -c public localhost | grep "^IF-MIB::if.*\.$ID"

It outputs a lots MIBs, but most relevants are:

IF-MIB::ifName.2 = STRING: enp3s0
IF-MIB::ifDescr.2 = STRING: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express
IF-MIB::ifType.2 = INTEGER: ethernetCsmacd(6)
IF-MIB::ifMtu.2 = INTEGER: 1500
IF-MIB::ifSpeed.2 = Gauge32: 10000000

IF-MIB::ifHighSpeed.2 = Gauge32: 10
IF-MIB::ifPromiscuousMode.2 = INTEGER: false(2)
IF-MIB::ifConnectorPresent.2 = INTEGER: true(1)

IF-MIB::ifPhysAddress.2 = STRING: AB:57:40:85:bc:35
IF-MIB::ifAdminStatus.2 = INTEGER: up(1)
IF-MIB::ifOperStatus.2 = INTEGER: up(1)
IF-MIB::ifLastChange.2 = Timeticks: (1879004) 5:13:10.04

IF-MIB::ifInOctets.2 = Counter32: 997055099
IF-MIB::ifInUcastPkts.2 = Counter32: 807196
IF-MIB::ifInNUcastPkts.2 = Counter32: 625
IF-MIB::ifInDiscards.2 = Counter32: 0
IF-MIB::ifInErrors.2 = Counter32: 0
IF-MIB::ifInUnknownProtos.2 = Counter32: 0

IF-MIB::ifOutOctets.2 = Counter32: 57885767
IF-MIB::ifOutUcastPkts.2 = Counter32: 519963
IF-MIB::ifOutNUcastPkts.2 = Counter32: 0
IF-MIB::ifOutDiscards.2 = Counter32: 0
IF-MIB::ifOutErrors.2 = Counter32: 0
IF-MIB::ifOutQLen.2 = Gauge32: 0

IF-MIB::ifHCInOctets.2 = Counter64: 997055099
IF-MIB::ifHCInUcastPkts.2 = Counter64: 807196
IF-MIB::ifHCInMulticastPkts.2 = Counter64: 625
IF-MIB::ifHCInBroadcastPkts.2 = Counter64: 0

IF-MIB::ifHCOutOctets.2 = Counter64: 57885767
IF-MIB::ifHCOutUcastPkts.2 = Counter64: 519963
IF-MIB::ifHCOutMulticastPkts.2 = Counter64: 0
IF-MIB::ifHCOutBroadcastPkts.2 = Counter64: 0

Now, you need to create your telegraf configuration file with the information that you need in input pugins, like:

###############################################################################
#                            INPUT PLUGINS                                    #
###############################################################################
[[inputs.snmp]]
  interval= "5s"
  agents = [ "127.0.0.1:161" ]
  version = 2
  community = "public"
  timeout= 2.0

  name = "system"
  [[inputs.snmp.field]]
    name="sysUpTime"
    oid="DISMAN-EVENT-MIB::sysUpTimeInstance"
  [[inputs.snmp.field]]
    name="OperStatus"
    oid="IF-MIB::ifOperStatus.2"
  [[inputs.snmp.field]]
    name="InOctets"
    oid="IF-MIB::ifInOctets.2"
  [[inputs.snmp.field]]
    name="InUcastPkts"
    oid="IF-MIB::ifInUcastPkts.2"
  [[inputs.snmp.field]]
    name="OutOctets"
    oid="IF-MIB::ifOutOctets.2"
    [[inputs.snmp.field]]
    name="OutUcastPkts"
    oid="IF-MIB::ifOutUcastPkts.2"
    is_tag = true
    conversion = "float"

Run your filter with the following sentence:

telegraf -config telegraf_snmp.conf --test

Now, you can see the data through InfluxDB

Enjoy it!