[GUIDE] Grafana, Prometheus, and snmp_exporter

[SaeedYa]

@godel0914

Thanks from me alse @bruins0437! I already had things running, but needed to update snmp_exporter and Prometheus and for the life of me couldn’t remember how I did it. Documented it this time

Might I add that running SNMP v2 isen’t secured and SNMP v3 is supported both by MikroTik and snmp_exporter.

On MikroTik terminal:

/snmp community add addresses=::/0 name=prometheus security=authorized read-access=yes write-access=no authentication-protocol=MD5 encryption-protocol=DES authentication-password=AUTH-PASS encryption-password=ENCR-PASS

Edit “name”, “AUTH-PASS”, “ENCR-PASS” and addresess=<IP-ADDRESS-OF-PROMETHEUS-SERVER"

/snmp set contact=<your-e-mail@example.com enabled=yes engine-id=mikrotik location="<location-of-MikroTik>" trap-community=prometheus trap-target=<ip-address-of-Mikrotik> trap-version=3

“Contact” and “Location” are optional, “trap-target” is MikroTik’s IP address

On the Prometheus/snmp_exporter/Grafana server:
Then place this code block to the top of snmp.yml replacing AUTH-PASS, ENCR-PASS and username with:

version: 3
  auth:
    security_level: authNoPriv
#    community: prometheus
    username: prometheus
    password: AUTH-PASS
    auth_protocol: MD5
    priv_protocol: AES
    priv_password: ENCR-PASS
    context_name: mikrotik

Module and Auth section are now separated in SNMP Exporter - https://github.com/prometheus/snmp_exporter/blob/main/auth-split-migration.md
So the code must be updated to something similar below.

auths:
  snmpv3:
    version: 3
    security_level: authPriv
    username: prometheus
    password: AUTH-PASS
    auth_protocol: MD5
    priv_protocol: AES
    priv_password: ENCR-PASS


modules:
  mikrotik:
    walk:
    - 1.3.6.1.2.1.2
    - 1.3.6.1.2.1.25
    - 1.3.6.1.2.1.31
    - 1.3.6.1.4.1.14988
    - 1.3.6.1.4.1.2021.10.1.1
    - 1.3.6.1.4.1.2021.10.1.2
    - 1.3.6.1.2.1.1.5.0
    ....

Also do not forget to update Prometheus yaml config to use SNMP v3

 - job_name: mikrotik
    static_configs:
      - targets:
        - 192.168.10.1  # SNMP device IP.
    metrics_path: /snmp
    params:
      auth: [snmpv3]
      module: [mikrotik]
    relabel_configs:
      - source_labels: [__address__]
        target_label: __param_target
      - source_labels: [__param_target]
        target_label: instance
      - target_label: __address__
        replacement: SNMP_Exporter IP Address:9116