Number of mongodb exoprters installed

liuyanan · September 27, 2021, 6:56am

Hello,
I have a mongodb replica set with one master node and two slave nodes. I want to install mongodb exoprter to collect mongodb indicators and configure it to send data to existing Prometheus. Do I only need to install mongodb exoprter on the master node of mongodb? Or do I need to install mongodb exoprter on every node?
Currently I only have mongodb exopter installed on the master node, but I can’t get information on the two slave nodes

Vadim_Yalovets · September 27, 2021, 9:08am

Hi Liu,

Please install the exporter on each node.

liuyanan · September 28, 2021, 6:01am

Thank you !!
That is to say, I should deploy Mongodb_exporter on all three nodes, and in this way, the MongoDB_ReplSet_Summary and MongoDB_Instances_Overview dashboards can display information about the three nodes?
https://github.com/percona/grafana-dashboards/blob/main/dashboards/MongoDB_ReplSet_Summary.json
https://github.com/percona/grafana-dashboards/blob/main/dashboards/MongoDB_Instances_Overview.json

Vadim_Yalovets · September 28, 2021, 11:31am

If dashboards would be used without a PMM please convert them by the next script.

github.com

percona/grafana-dashboards/blob/main/misc/convert-dash-from-PMM.py

##############################################################################################################
# This script converts a PMM dashboard so it can be used in an external Prometheus + Grafana installation. 
# It doesn't need any input from you. It replaces PMM2 labels (node_name, service_name) 
# used in variables with default labels (instance).
#
##############################################################################################################
#
#    !!! WARNING !!! 
#
# The script is for experiments and education. There is no guarantee that it will work on all cases as 
# the PMM uses specific labels to provide a better user experience to PMM users. 
#
##############################################################################################################



#!/usr/bin/env python2

import sys
import json

This file has been truncated. show original

liuyanan · October 14, 2021, 2:09am

Hi，I have completed the deployment of three exporters. How do I set the label of target in Prometheus? Will this label affect the display of dashboard

Vadim_Yalovets · October 14, 2021, 9:24am

The script is replacing PMM2 labels by default Prometheus labels. So no additional labels are required.

liuyanan · October 15, 2021, 2:29am

It worked, but there was another problem. How to obtain the PMM-Pt-summary-Panel plugin?

Vadim_Yalovets · October 15, 2021, 7:20am

It’s a part of PMM2. So please just remove this element from the dashboard.

liuyanan · October 15, 2021, 7:26am

Okay, thank you so much. I have completed the deployment of mongoDB exporter and mongoDB dashboard, thank you for your guidance

liuyanan · October 19, 2021, 12:47am

No matter which node I select in mongoDB Replset, this panel shows Primary. I checked that metrics all returned 1. Do you know why?
The last image shows details of mongoDB Replset.

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Number of mongodb exoprters installed

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