Grafana RRD Server

A simple HTTP server that reads RRD files and responds to requests from Grafana with Grafana Simple JSON Datasource plugin.

This server supports all endpoints (urls) defined in the Grafana Simple JSON Datasource plugin documentation but:

• You can use * as a wildcard in the target values (but not for ds) for the /query endpoint.

Requirement

• librrd-dev (rrdtool)
• Go
• Grafana 3.0 and newer + Simple JSON Datasource plugin 1.0.0 and newer

Usage

1. Install librrd-dev (rrdtool).

   On Ubuntu/Debian:

   sudo apt install librrd-dev
   

   On CentOS:

   sudo yum install rrdtool-devel
   

   On openSUSE

   sudo zypper in rrdtool-devel
   

   On Mac:

   brew install rrdtool
   

2. Get the package.

   go get github.com/doublemarket/grafana-rrd-server
   

   Otherwise, download the latest release, gunzip it, and put the file in a directory included in $PATH:

   gunzip grafana-rrd-server_linux_amd64.gz
   

3. Run the server.

   grafana-rrd-server
   

   You can use the following options:

   • -h : Shows help messages.
   • -p : Specifies server port. (default: 9000)
   • -i : Specifies server listen address. (default: any)
   • -r : Specifies a directory path keeping RRD files. (default: "./sample/")
     • The server recursively searches RRD files under the directory and returns a list of them for the /search endpoint.
   • -a : Specifies the annotations file. It should be a CSV file which has a title line at the top like the sample file.
   • -s : Default graph step in second. (default: 10)
     • You can see the step for your RRD file using:

       $ rrdtool info [rrd file] | grep step
       step = 300
       

4. Optionally set up systemd unit:

useradd grafanarrd
cat > /etc/systemd/system/grafana-rrd-server.service <<EOF
[Unit]
Description=Grafana RRD Server
After=network.service

[Service]
User=grafanarrd
Group=grafanarrd
Restart=on-failure
Environment="LD_LIBRARY_PATH=/opt/rrdtool-1.6/lib"
ExecStart=/opt/grafana-rrd-server/grafana-rrd-server -p 9000 -r /path/to/rrds -s 300
RestartSec=10s

[Install]
WantedBy=default.target
EOF

systemctl daemon-reload
systemctl enable grafana-rrd-server
systemctl start grafana-rrd-server

5. Setup Grafana and Simple JSON Datastore plugin.

   See Grafana documentation

6. Create datasource.

Contributing

1. Install librrd-dev (rrdtool).

   See the Usage section.

2. Clone the repository.

3. Commit your code on a separate branch.

4. Create a pull request.

License

MIT