From: Snapshot-Content-Location: https://wadman.co.nz/2022/01/02/Viewing-LibreNMS-data-in-Grafana/ Subject: Viewing LibreNMS data in Grafana - Michael Wadman | Solutions Architect Date: Mon, 21 Jul 2025 00:04:16 -0400 MIME-Version: 1.0 Content-Type: multipart/related; type="text/html"; boundary="----MultipartBoundary--L2xdrp6WSBU9kAyZzl2KZUdjENMGyUdxDOEr8Krrcn----" ------MultipartBoundary--L2xdrp6WSBU9kAyZzl2KZUdjENMGyUdxDOEr8Krrcn---- Content-Type: text/html Content-ID: Content-Transfer-Encoding: quoted-printable Content-Location: https://wadman.co.nz/2022/01/02/Viewing-LibreNMS-data-in-Grafana/ =20 Viewing LibreNMS data in Grafana - Michael Wadman | Solutions Ar= chitect =20

=20 Monitoring =20 Grafana =20 LibreNMS =20

Viewing LibreNMS data in Grafana

=20 =20

Using RRDReST as a Grafana dat= a source

=20 Posted by Michael Wadman on Januar= y 2, 2022

Overview

LibreNMS is a great network device monitoring system, and Grafana is a w= onderful tool for visualising and alerting on data from multiple sources. Both are great examples of open-source software that you should be consider= ing for your environment.

However, while LibreNMS does provide official integration with many external d= atabases that you can then use as a data source in Grafana, if you don=E2= =80=99t already have one of these in your environment it requires you to de= ploy these as well.
I=E2=80=99ve also personally run into performance issues with the Prometheus Pu= shgateway integration when pushing a large number of metrics, probably = because Pushgatew= ay isn=E2=80=99t designed for that use case.

Recently I stumbled upon a Reddit post= by user /u/wjhinz which described a method for =E2=80=9C(almost) nativ= ely=E2=80=9D using LibreNMS as a data source in Grafana by using RRDReST as an API endpoint to acces= s the RRD files that LibreNMS creates.
After testing this and confirming it works very well, I wanted to add to th= e Reddit post by documenting what a containerised deployment of this soluti= on looks like.

Major kudos to both /u/tb= otnz (for their work on RRDReST) and /u/wjhinz (for documenting this solution).

Containerised Deployment

LibreNMS

I=E2=80=99ll be using Docker Compose for this deployment, and starting w= ith the LibreNMS docker example compose file as the= base.
I=E2=80=99ve trimmed some services that aren=E2=80=99t needed (mstpd, syslo= g and SNMP traps), and included my compose file in an appendix section.

RRDReST

Next, we want to add an RRDReST container. As a container image doesn=E2= =80=99t currently exist, we will need to create one.
Thanks to tbotnz, who has provided instructions on how to get RRDReST running in his Git= hub repository, creating a container image is relatively easy.
Here=E2=80=99s the Dockerfile I=E2=80=99ve written:

FROM python:3.10-alpine
RUN apk add g++ make rrdtool
COPY requirements.txt /opt/RRDRe=
ST/requirements.txt
WORKDIR /opt/RRDReST
RUN pip3 install -r requirements.txt
COPY . /opt/RRDReST
ENTRYPOINT ["uvicorn", "rrdrest:=
rrd_rest"]
CMD ["--host", "0.0.0.0", "--por=
t", "9000"]

I=E2=80=99ve built the container using this and pushed it to be pulled from Docker Hub<= /a> as well.

To add this to our deployment, we simply need to add another service to = the docker-compose.yml= file and give the container access to the LibreNMS volume (so it ca= n read the RRD files).
I=E2=80=99m using /opt= /librenms as the mount point for the volume, as it mimics where data= would be located in a non-containerised deployment.

services:
  ...
  rrdrest:
    image: michaelwadman/rrdrest:latest
    container_name: rrdrest
    volumes:
      - "./librenms:/opt/librenms"

As /u/wjhinz notes in their post, RRDReST needs read access to the RRD f= iles, which should be fine with a docker-compose set up like this, but coul= d be a good place to start investigations if it isn=E2=80=99t working for y= ou.

Grafana

Finally, we want to add a Grafana container.

services:
  ...
  grafana:
    image: grafana/grafana-oss:latest
    container_name: grafana
    ports:
      - target: 3000
        published: 3000
        protocol: tcp
    environment:
      - "GF_INSTALL_PLUGINS=3Dmarcusolsson-json-datasource"

Note that I=E2=80=99m adding an environment variable for the installatio= n of the JSON API plugin, as this is needed to interact with both th= e LibreNMS API as well as the RRDReST API.

docker-compose up

With a complete compose file, we can spin up the environment:

$ =
sudo docker-compose up -d
Creating network "librenms_grafana_default" with =
the default driver
Creating librenms            ... done
Creating grafana             ... done
Creating librenms_db         ... done
Creating librenms_dispatcher ... done
Creating librenms_redis      ... done
Creating librenms_memcached  ... done
Creating rrdrest             ... done

Adding data sources in Grafana

Creating LibreNMS user

To add LibreNMS as a data source in Grafana, we first need to create an = API token in LibreNMS.
Visit the LibreNMS web interface and log in (in my case, =E2=80=9Chttp://12= 7.0.0.1:8000=E2=80=9D, with the default credentials of librenms/librenms).<= /p>

Because Grafana will only require read access, we=E2=80=99re going to cr= eate a new user with read-only access and then associate the token we creat= e with that user.
Under =E2=80=98Settings -> Manage Users=E2=80=99, I created a user named= =E2=80=9Cgrafana=E2=80=9D, changed the access level to =E2=80=9CGlobal Rea= d=E2=80=9D and set a random password as we will only be using the API acces= s.

3D"Cr=

Then, under =E2=80=98Settings -> API -> API Settings=E2=80=99, I c= reated an API token for the grafana user:

=3D"Creating

3D"Libr=

Make sure to copy the token when creating it, as we=E2=80=99ll need that= later when adding the data source into LibreNMS.

Adding LibreNMS data sour= ce in Grafana

After logging into the Grafana web interface (in my case, =E2=80=9Chttp:= //127.0.0.1:3000=E2=80=9D, with the default credentials of admin/admin), na= vigate to =E2=80=98Configuration -> Data Sources=E2=80=99 from the left = pane.
Add a new data source and select the JSON API type from the list.

In the settings for the LibreNMS API data source, we need to change the = URL and add the token authentication header.
The URL should be set to your LibreNMS host and port, with the API endpoint= of =E2=80=9C/api/v0=E2=80=9D appended.
Then, under =E2=80=9CCustom HTTP Headers=E2=80=9D, select =E2=80=9CAdd Head= er=E2=80=9D. The header name will be =E2=80=9CX-Auth-Token=E2=80=9D and the= value will be the token string that you created above.
Save and test that the API endpoint is working for you, and you should get = a green =E2=80=9CSuccess=E2=80=9D pop-up if everything is working.

My data source looked like the following when finished:

Adding RRDReST data source= in Grafana

Like the above, we=E2=80=99re going to also add the RRDReST API as a new= data source in Grafana too.
This will also be a JSON API, so select this from the data source type when= creating it.

In the settings for the RRDReST API data source, we only need to change = the URL.
Again, point this towards your RRDReST container host and port, and leave t= he endpoint blank.
Save and test that the API endpoint is working for you, and you should get = a red =E2=80=9CUnprocessable Entity=E2=80=9D pop-up if everything is workin= g. This error means the API is reachable, but the plugin can=E2=80=99t proc= ess the data returned (which is expected, because there isn=E2=80=99t any d= ata returned, as we haven=E2=80=99t pointed it to an RRD file yet).

My data source looked like the following when finished:

=3D"Grafana

Creating a dashboard

The last thing to do is to create a dashboard for the LibreNMS data to b= e visualised.
From the left pane in Grafana, select =E2=80=98Create -> Import=E2=80=99= and then upload the JSON file cr= eated by /u/wjhinz on Pastebin. I=E2=80=99ve also included it in an app= endix section below in the case that the Pastebin link goes away for some r= eason.

After import, you=E2=80=99ll be prompted to name the dashboard, place it= into a folder and select the data sources you created before. Here=E2=80= =99s what mine looked like before import:

3D"Grafana

There was one last item that I needed to change to get data displayed on= the graph panels, which was to set the timezone to UTC. I believe this is = needed because LibreNMS stores (or RRDReST represents) data in UTC format, = but Grafana queries it with the local browser timezone by default.
To do so, drop-down the time picker from the top right of the dashboard scr= een, select =E2=80=9CChange Time Settings=E2=80=9D and choose UTC.

=3D"Grafana

If you=E2=80=99ve got devices in LibreNMS, they should appear up the top= left of the page in a drop down menu along with a list of interfaces. Afte= r selecting a device and an interface, both the =E2=80=9CBandwidth In/Out= =E2=80=9D and =E2=80=9CErrors In/Out=E2=80=9D graphs will populate with inf= ormation:

3D"Grafana

While the panels in the dashboard provided only show port throughput and= errors, it=E2=80=99s pretty easy to pick up the other RRD files in a devic= e directory and display those statistics as well.
For example, LibreNMS has created 64 other RRD files full of stats for my t= est device:

$ =
sudo docker exec -it rrdrest ls /opt/librenms/rrd/
Test_Device
$ sudo docker exec -it rrdrest ls /opt/librenms/rrd/Test_Device/ | grep -v port | wc -l
64

Conclusion

Providing RRDReST access to the RRD files that LibreNMS creates is not o= nly easy, but it performs well too.
If you are already using Grafana in your environment to visualise, analyse = and/or alert on data in a centralised fashion, then pulling SNMP metrics in= through LibreNMS (and its=E2=80=99 device discovery feature) from devices = that are otherwise unmonitored and using RRDReST as a data source is a grea= t =E2=80=9Cquick win=E2=80=9D.

Appendices

References

wjhinz=E2=80=99s Reddit Post
RRDReST Repository
RRDReST Containe= r Image
Grafana JSON API Data source Plugin

Versions used

Desktop Machine: Ubuntu 20.04
Docker: 20.10.12
Docker Compose: 1.26.2
LibreNMS: 21.11.0
Grafana: 8.3.3

Full Code

Docker Compose file

version: "3.5"

services:
  db:
    image: mariadb:10.5
    container_name: librenms_db
    command:
      - "mysqld"
      - "--innodb-file-per-table=3D1"
      - "--lower-case-table-names=3D0"
      - "--character-set-server=3Dutf8mb4"
      - "--collation-server=3Dutf8mb4_unicode_ci"
    volumes:
      - "./db:/var/lib/mysql"
    environment:
      - "TZ=3DPacific/Auckland"
      - "MYSQL_ALLOW_EMPTY_PASSWORD=3Dyes"
      - "MYSQL_DATABASE=3Dlibrenms"
      - "MYSQL_USER=3Dlibrenms"
      - "MYSQL_PASSWORD=3Dasupersecretpassword"
    restart: always

  memcached:
    image: memcached:alpine
    container_name: librenms_memcached
    environment:
      - "TZ=3DPacific/Auckland"
    restart: always

  redis:
    image: redis:5.0-alpine
    container_name: librenms_redis
    environment:
      - "TZ=3DPacific/Auckland"
    restart: always

  librenms:
    image: librenms/librenms:latest
    container_name: librenms
    hostname: librenms
    cap_add:
      - NET_ADMIN
      - NET_RAW
    ports:
      - target: 8000
        published: 8000
        protocol: tcp
    volumes:
      - "./librenms:/data"
    environment:
      - "TZ=3DPacific/Auckland"
      - "PUID=3D1000"
      - "PGID=3D1000"
      - "DB_HOST=3Ddb"
      - "DB_NAME=3Dlibrenms"
      - "DB_USER=3Dlibrenms"
      - "DB_PASSWORD=3Dasupersecretpassword"
      - "DB_TIMEOUT=3D60"
      - "REDIS_HOST=3Dredis"
      - "REDIS_PORT=3D6379"
      - "REDIS_DB=3D0"
      - "MEMORY_LIMIT=3D256M"
      - "UPLOAD_MAX_SIZE=3D16M"
      - "OPCACHE_MEM_SIZE=3D128"
      - "REAL_IP_FROM=3D0.0.0.0/32"
      - "REAL_IP_HEADER=3DX-Forwarded-For"
      - "LOG_IP_VAR=3Dremote_addr"
      - "MEMCACHED_HOST=3Dmemcached"
      - "MEMCACHED_PORT=3D11211"
      - "LIBRENMS_WEATHERMAP=3Dfalse"
    restart: always

  dispatcher:
    image: librenms/librenms:latest
    container_name: librenms_dispatcher
    hostname: librenms-dispatcher
    cap_add:
      - NET_ADMIN
      - NET_RAW
    volumes:
      - "./librenms:/data"
    environment:
      - "TZ=3DPacific/Auckland"
      - "PUID=3D1000"
      - "PGID=3D1000"
      - "DB_HOST=3Ddb"
      - "DB_NAME=3Dlibrenms"
      - "DB_USER=3Dlibrenms"
      - "DB_PASSWORD=3Dasupersecretpassword"
      - "DB_TIMEOUT=3D60"
      - "DISPATCHER_NODE_ID=3Ddispatcher1"
      - "REDIS_HOST=3Dredis"
      - "REDIS_PORT=3D6379"
      - "REDIS_DB=3D0"
      - "SIDECAR_DISPATCHER=3D1"
      - "MEMORY_LIMIT=3D256M"
      - "UPLOAD_MAX_SIZE=3D16M"
      - "OPCACHE_MEM_SIZE=3D128"
      - "REAL_IP_FROM=3D0.0.0.0/32"
      - "REAL_IP_HEADER=3DX-Forwarded-For"
      - "LOG_IP_VAR=3Dremote_addr"
      - "MEMCACHED_HOST=3Dmemcached"
      - "MEMCACHED_PORT=3D11211"
      - "LIBRENMS_WEATHERMAP=3Dfalse"
    restart: always

  rrdrest:
    image: michaelwadman/rrdrest:latest
    container_name: rrdrest
    volumes:
      - "./librenms:/opt/librenms"

  grafana:
    image: grafana/grafana-oss:latest
    container_name: grafana
    ports:
      - target: 3000
        published: 3000
        protocol: tcp
    environment:
      - "GF_INSTALL_PLUGINS=3Dmarcusolsson-json-datasource"

Grafana Dashboard JSON

{
  "__inputs": [
    {
      "name": "DS_RRDREST_API",
      "label": "RRDRest API",
      "description": ""=
,
      "type": "datasource",
      "pluginId":=
 "marcusolsson-json-datasource"=
,
      "pluginName": "JSON API"
    },
    {
      "name": "DS_LIBRENMS_API",
      "label": "LibreNMS API",
      "description": ""=
,
      "type": "datasource",
      "pluginId":=
 "marcusolsson-json-datasource"=
,
      "pluginName": "JSON API"
    }
  ],
  "__requires": [
    {
      "type": "grafana"=
,
      "id": "grafana",<=
/span>
      "name": "Grafana"
    },
    {
      "type": "panel",<=
/span>
      "id": "graph",
      "name": "Graph",<=
/span>
      "version":<=
span class=3D"w"> ""
    },
    {
      "type": "datasource",
      "id": "marcusolsson-json-datasource",
      "name": "JSON API",
      "version":<=
span class=3D"w"> "1.2.1"
    }
  ],
  "annotations":<=
span class=3D"w"> {
    "list": [
      {
        "builtIn": 1,
        "datasource": "-- Grafana --",
        "enable":=
 true,=

        "hide": true,
        "iconColor": "rgba(0, 211, 255, 1)",
        "name": "Annotations & Alerts",
        "type": "dashboard"
      }
    ]
  },
  "editable": true,
  "gnetId": null,
  "graphTooltip":=
 0,
  "id": null,
  "iteration": 1626152089476,
  "links": [],
  "panels": [
    {
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,=

      "dashes": false,<=
/span>
      "datasource": "${DS_RRDREST_API}",
      "fieldConfig": {
        "defaults": {
          "custom": {},
          "unit":=
 "bps"
        },
        "overrides": []
      },
      "fill": 1,=

      "fillGradient": 0=
,
      "gridPos":<=
span class=3D"w"> {
        "h": 15,=

        "w": 24,=

        "x": 0,<=
span class=3D"w">
        "y": 0
      },
      "hiddenSeries": false,
      "id": 2,
      "legend": {
        "avg": false,
        "current": false,
        "max": false,
        "min": false,
        "show": true,
        "total":<=
span class=3D"w"> false,=

        "values":=
 false
      },
      "lines": true,
      "linewidth": 1,
      "nullPointMode": "null",
      "options":<=
span class=3D"w"> {
        "alertThreshold"=
: true
      },
      "percentage": false,
      "pluginVersion": "7.3.5",
      "pointradius": 2,=

      "points": false,<=
/span>
      "renderer":=
 "flot",
      "seriesOverrides":=
 [],
      "spaceLength": 10=
,
      "stack": false,
      "steppedLine": false,
      "targets":<=
span class=3D"w"> [
        {
          "body":=
 "",
          "cacheDurationSeconds": 0,
          "fields": [
            {
              "jsonPath"=
: "$.data[*].time",
              "name": "time",
              "type": "time"
            },
            {
              "jsonPath"=
: "$.data[*].inoctets",
              "name": "inoctets",
              "type": "number"
            },
            {
              "jsonPath"=
: "$.data[*].outoctets"<=
/span>,
              "name": "outoctets",
              "type": "number"
            }
          ],
          "hide":=
 false=
,
          "method": "GET",
          "params": [
            [
              "",=

              ""
            ]
          ],
          "queryParams":=
 "",
          "refId": "A",=

          "urlPath": "?rrd_path=3D/opt/librenms/=
rrd/$device/port-id$portid.rrd&epoch_start_time=3D${__from:date:seconds=
}&epoch_end_time=3D${__to:date:seconds}"
        }
      ],
      "thresholds": [],
      "timeFrom":=
 null,=

      "timeRegions": [],
      "timeShift": null=
,
      "title": "Bandwidth In/Out",
      "tooltip":<=
span class=3D"w"> {
        "shared":=
 true,=

        "sort": 0,
        "value_type": "individual"
      },
      "transformations":=
 [
        {
          "id": "calculateField",
          "options": {
            "alias": "inMbps",
            "binary": {
              "left": "inoctets",
              "operator"=
: "*",
              "reducer":=
 "sum",
              "right": "8"
            },
            "mode": "binary",
            "reduce": {
              "include":=
 [
                "inoctets"
              ],
              "reducer":=
 "lastNotNull"
            },
            "replaceFields": false
          }
        },
        {
          "id": "calculateField",
          "options": {
            "alias": "outMbps",
            "binary": {
              "left": "outoctets",
              "operator"=
: "*",
              "reducer":=
 "sum",
              "right": "8"
            },
            "mode": "binary",
            "reduce": {
              "reducer":=
 "sum"
            },
            "replaceFields": false
          }
        },
        {
          "id": "filterFieldsByName",
          "options": {
            "include": {
              "names": [
                "time",<=
/span>
                "inMbps"=
,
                "outMbps"
              ]
            }
          }
        }
      ],
      "type": "graph",<=
/span>
      "xaxis": {
        "buckets": null=
,
        "mode": "time",=

        "name": null,
        "show": true,
        "values":=
 []
      },
      "yaxes": [
        {
          "$$hashKey": "object:1546",
          "format": "bps",
          "label": null=
,
          "logBase": 1,=

          "max":<=
span class=3D"w"> null,<=
/span>
          "min":<=
span class=3D"w"> null,<=
/span>
          "show":=
 true
        },
        {
          "$$hashKey": "object:1547",
          "format": "short",
          "label": null=
,
          "logBase": 1,=

          "max":<=
span class=3D"w"> null,<=
/span>
          "min":<=
span class=3D"w"> null,<=
/span>
          "show":=
 true
        }
      ],
      "yaxis": {
        "align":<=
span class=3D"w"> false,=

        "alignLevel": null
      }
    },
    {
      "aliasColors": {},
      "bars": false,
      "dashLength": 10,=

      "dashes": false,<=
/span>
      "datasource": "${DS_RRDREST_API}",
      "fieldConfig": {
        "defaults": {
          "custom": {},
          "unit":=
 "bps"
        },
        "overrides": []
      },
      "fill": 1,=

      "fillGradient": 0=
,
      "gridPos":<=
span class=3D"w"> {
        "h": 15,=

        "w": 24,=

        "x": 0,<=
span class=3D"w">
        "y": 15
      },
      "hiddenSeries": false,
      "id": 3,
      "legend": {
        "avg": false,
        "current": false,
        "max": false,
        "min": false,
        "show": true,
        "total":<=
span class=3D"w"> false,=

        "values":=
 false
      },
      "lines": true,
      "linewidth": 1,
      "nullPointMode": "null",
      "options":<=
span class=3D"w"> {
        "alertThreshold"=
: true
      },
      "percentage": false,
      "pluginVersion": "7.3.5",
      "pointradius": 2,=

      "points": false,<=
/span>
      "renderer":=
 "flot",
      "seriesOverrides":=
 [],
      "spaceLength": 10=
,
      "stack": false,
      "steppedLine": false,
      "targets":<=
span class=3D"w"> [
        {
          "body":=
 "",
          "cacheDurationSeconds": 0,
          "fields": [
            {
              "jsonPath"=
: "$.data[*].time",
              "name": "time",
              "type": "time"
            },
            {
              "jsonPath"=
: "$.data[*].inerrors",
              "name": "inerrors",
              "type": "number"
            },
            {
              "jsonPath"=
: "$.data[*].outerrors"<=
/span>,
              "name": "outerrors",
              "type": "number"
            }
          ],
          "hide":=
 false=
,
          "method": "GET",
          "params": [
            [
              "",=

              ""
            ]
          ],
          "queryParams":=
 "",
          "refId": "A",=

          "urlPath": "?rrd_path=3D/opt/librenms/=
rrd/$device/port-id$portid.rrd&epoch_start_time=3D${__from:date:seconds=
}&epoch_end_time=3D${__to:date:seconds}"
        }
      ],
      "thresholds": [],
      "timeFrom":=
 null,=

      "timeRegions": [],
      "timeShift": null=
,
      "title": "Errors In/Out",
      "tooltip":<=
span class=3D"w"> {
        "shared":=
 true,=

        "sort": 0,
        "value_type": "individual"
      },
      "transformations":=
 [],
      "type": "graph",<=
/span>
      "xaxis": {
        "buckets": null=
,
        "mode": "time",=

        "name": null,
        "show": true,
        "values":=
 []
      },
      "yaxes": [
        {
          "$$hashKey": "object:1546",
          "format": "bps",
          "label": null=
,
          "logBase": 1,=

          "max":<=
span class=3D"w"> null,<=
/span>
          "min":<=
span class=3D"w"> null,<=
/span>
          "show":=
 true
        },
        {
          "$$hashKey": "object:1547",
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          "label": null=
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          "max":<=
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      ],
      "yaxis": {
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  "tags": [],
  "templating": {
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        "hide": 0,
        "includeAll": false,
        "label":<=
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        "multi":<=
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        "name": "device",
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          "method": "GET",
          "queryParams":=
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        "refresh": 1,
        "regex":<=
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        "tagsQuery": ""=
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        "type": "query"=
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      {
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        "datasource": "${DS_LIBRENMS_API}",
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        "hide": 0,
        "includeAll": false,
        "label":<=
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        "name": "portid",
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          ],
          "method": "GET",
          "queryParams":=
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        "regex":<=
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        "tags": [],
        "tagsQuery": ""=
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  "timezone": "utc",
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}

=20

CATALOG

=20