Free monitoring using InfluxDB, Telegraf and Grafana
In this serie of monitorization that i will start today, we are going to see through various posts how to create a free and interactive monitoring system.
The first post will deal with one of the most important tasks, which is the configuration and installation of Telegraf to collect the data from the counters that will be sent to our InfluxDB database and then display them using Grafana.
What is Telegraf, InfluxDB and Grafana?
Telegraf is a very light agent that is in charge of collecting, processing and sending the metrics of a machine that we want to monitor to our database, Influxdb.
InfluxDB is the database in which we will store the metrics sent from the agent. This database is designed to withstand high write and read loads. Here is some more information.
Grafana is a data analysis platform that allows viewing it using queries. We can create panels that show only X data.
Before starting the post we must have a previous scenario to be able to use this agent. We will use two servers that we will call Server1 and Server2:
- Server1 with InfluxDB and Grafana installed. We have used a Linux server. Here you can see how to install InfluxDB and Grafana
We must open the output port 3000, it is the one that Grafana uses and enable the input port that InfluxDB uses. The default port is 8086
- Server2: A machine that we want to monitor, in our case it will be Windows. With the output port that we have enabled for Influxdb open. 8086 if it is the default port.
Once we have these steps we will go on to explain the installation and configuration of the Telegraf file and its operation.
To start monitoring we must perform two tasks
- Create the Database with InfluxDB
- Configure and install Telegraf
Create the Database with InfluxDB
Before starting with the configuration we need to create a database to store the server metrics that we want to monitor, so the first step will be to access Server1 where we have InfluxDB installed.
Inside the machine we access InfluxDB using the following command:
influx -host localhost -port 8086
-port: Here we will put the port which we have configured our database. 8086 is the default port.
Ahora crearemos la nueva base de datos donde se conectará Telegraf:
CREATE DATABASE AlesonITC WITH DURATION 30d
DURATION: Time that we want to store the data of the monitored server. In this case it will be 30 days
To show all databases we use:
SHOW ALL DATABASES
We already have the database created, now we can go to configure and install Telegraf.
Configure and Install Telegraf
On Server2, Windows. Open the browser and download the Telegraf files for InfluxDB from Github.
Once downloaded unzip the files. Copy the file telegraf.conf.sample and rename it to telegraf.conf. When we have renamed it, open it and go to configure the file.
First we must configure the time it takes to collect the data and send it:
By default it is 10 seconds, but depending on the number of servers this can be a problem so we have increased it to 1 minute.
The next step will be to configure the IP of Server1, our InfluxDB server, with its respective port:
Add the database that we just created:
To add the plugin, copy the code and paste it at the end of the telegraf.conf file.
Once the configuration of the file is done, proceed with the installation of the agent.
Open a file explorer, access “C: \ Program files” and create a folder called telegraf to store the files telegraf.exe and telegraf.conf
Move the files telegraf.exe y telegraf.conf to this folder and open a command line as administrator.
Move to this folder:
cd “c:\program files\telegraf”
Install the agent:
telegraf.exe --service install
Start the service:
net start telegraf
To see if there is any error we open telegraf.exe with the command line:
Go back to Server1 and go back to InfluxDB to check that the data is coming:
influx -host localhost -port 8086
Select the Database that we are using to storage the metrics:
To verify that you are receiving data, we will launch a query with the data that the Telegraf Agent is sending:
select Percent_User_Time from win_cpu
As we can see the query shows us the data that is being stored within this database.
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Database Administrator. Centrado en la monitorización y el rendimiento de las bases de datos.