successfully got node_exporter on RT-AX58U

[beep]

Hi,

This is just to share the way i got this working,
node_exporter is a service that publish metrics from the system to Prometheus.
Prometheus is a open-source monitoring solution. Where you can get alerts and graph on system metrics.
https://prometheus.io/

Prerequisite:
Enable JFFS custom scripts and configs
install entware
entware applications:
go (currently 1.14-2)

Download and extract node_exporter 1.0.0 ( RT-AX58U have armv7 other routers may be different)
filter the Architecture at https://prometheus.io/download/ to find node_exporter
untar it to your entware opt directory /opt/opt
mkdir /opt/opt
cd /opt/opt
wget https://github.com/prometheus/node_...v1.0.0/node_exporter-1.0.0.linux-armv7.tar.gz
tar xfzv node_exporter-1.0.0.linux-armv7.tar.gz

Autostart node_exporter on boot:
place this line after entware in /jffs/scripts/post-mount

ps | grep "node_exporter" | grep -v -q "grep" || /opt/opt/node_exporter-1.0.0.linux-armv7/node_exporter --web.listen-address=:9101 --no-collector.powersupplyclass --no-collector.mdadm

The default port for node_exporter is 9100 but is currently being used by lpd so we use 9101 and turn off some collectors that doesn't exists.

Optional you can silence the alerts when you reboot the router by calling alertmanager API to add a silent for your devices when the router reboots and network connection is absent.
For this you need additional entware app to handle dates "coreutils-date"
In /jffs/scripts/services-stop add this

#add your instance device list to get silenced while rebooting, separated with space
instances="192.168.0.1:9001"

matchers=""
for ins in ${instances}
do
matchers="${matchers}
    {
        \"isRegex\": false,
        \"name\": \"instance\",
        \"value\": \"${ins}\"
    },"
done

#starts now
startsAt="$(date -u +%Y-%m-%dT%H:%M:%S)"
#ends after 10 minutes
endsAt="$(/opt/bin/date -u --date="+10 minutes" +%Y-%m-%dT%H:%M:%S)"

silence="
{
    \"comment\": \"Router rebooting\",
    \"createdBy\": \"services-stop\",
    \"startsAt\": \"${startsAt}\",
    \"endsAt\": \"${endsAt}\",
    \"matchers\": [
${matchers}
    ]
}
"
silence=$(echo ${silence} | sed 's/}, ]/} ]/g')

# if you need to debug the POST
#echo -e "${silence}" > /opt/opt/silence-post

#change your alertmanager address and port, you will get a silence id stored at /opt/opt/silence-id
curl -s -X POST -H "Content-Type: application/json" http://192.168.0.2:9093/api/v2/silences -d "${silence}" > /opt/opt/silence-id

and for there you can integrate Prometheus with grafana to get nice graphs from your router. see grafana.png


cheers,
beep

 

[Palanivelrajan]

Awesome. I was trying to get this working on my RT-88u and never got it working. I followed the above instructions and it worked perfectly!

Do you know if we have a way to export router specific stats like no of client connected, no in 2gz , 5gz, lan connections, upstream ip address etc. ??

 

[beep]

I just notice that it probably would need to add & at the end to fork it.

ps | grep "node_exporter" | grep -v -q "grep" || /opt/opt/node_exporter-1.0.0.linux-armv7/node_exporter --web.listen-address=:9101 --no-collector.powersupplyclass --no-collector.mdadm &

 

[beep]

Palanivelrajan

Awesome. I was trying to get this working on my RT-88u and never got it working. I followed the above instructions and it worked perfectly!

Do you know if we have a way to export router specific stats like no of client connected, no in 2gz , 5gz, lan connections, upstream ip address etc. ??

Hi Palanivelrajan,
If you can get that information via command line we can use --collector.textfile.directory= and node_exporter will include it. http://prometheus.io/docs/instrumenting/exposition_formats/

 

[Jason A]

Hi there,

Does this setup show network traffic by IP address?

Thanks

Jason

Hi,

This is just to share the way i got this working,
node_exporter is a service that publish metrics from the system to Prometheus.
Prometheus is a open-source monitoring solution. Where you can get alerts and graph on system metrics.
https://prometheus.io/

Prerequisite:
Enable JFFS custom scripts and configs
install entware
entware applications:
go (currently 1.14-2)

Download and extract node_exporter 1.0.0 ( RT-AX58U have armv7 other routers may be different)
filter the Architecture at https://prometheus.io/download/ to find node_exporter
untar it to your entware opt directory /opt/opt
mkdir /opt/opt
cd /opt/opt
wget https://github.com/prometheus/node_...v1.0.0/node_exporter-1.0.0.linux-armv7.tar.gz
tar xfzv node_exporter-1.0.0.linux-armv7.tar.gz

Autostart node_exporter on boot:
place this line after entware in /jffs/scripts/post-mount

ps | grep "node_exporter" | grep -v -q "grep" || /opt/opt/node_exporter-1.0.0.linux-armv7/node_exporter --web.listen-address=:9101 --no-collector.powersupplyclass --no-collector.mdadm

The default port for node_exporter is 9100 but is currently being used by lpd so we use 9101 and turn off some collectors that doesn't exists.

Optional you can silence the alerts when you reboot the router by calling alertmanager API to add a silent for your devices when the router reboots and network connection is absent.
For this you need additional entware app to handle dates "coreutils-date"
In /jffs/scripts/services-stop add this

#add your instance device list to get silenced while rebooting, separated with space
instances="192.168.0.1:9001"

matchers=""
for ins in ${instances}
do
matchers="${matchers}
    {
        \"isRegex\": false,
        \"name\": \"instance\",
        \"value\": \"${ins}\"
    },"
done

#starts now
startsAt="$(date -u +%Y-%m-%dT%H:%M:%S)"
#ends after 10 minutes
endsAt="$(/opt/bin/date -u --date="+10 minutes" +%Y-%m-%dT%H:%M:%S)"

silence="
{
    \"comment\": \"Router rebooting\",
    \"createdBy\": \"services-stop\",
    \"startsAt\": \"${startsAt}\",
    \"endsAt\": \"${endsAt}\",
    \"matchers\": [
${matchers}
    ]
}
"
silence=$(echo ${silence} | sed 's/}, ]/} ]/g')

# if you need to debug the POST
#echo -e "${silence}" > /opt/opt/silence-post

#change your alertmanager address and port, you will get a silence id stored at /opt/opt/silence-id
curl -s -X POST -H "Content-Type: application/json" http://192.168.0.2:9093/api/v2/silences -d "${silence}" > /opt/opt/silence-id

and for there you can integrate Prometheus with grafana to get nice graphs from your router. see grafana.png


cheers,
beep