Welcome to the fourth step of the Netdata tutorial.
Since the beginning, we've covered the building blocks of Netdata, dashboard basics, and how you can monitor many individual systems using many distributed Netdata agents.
Next up: configuration.
What you'll learn in this step
We'll talk about Netdata's default configuration, and then you'll learn how to do the following:
- Find your
- Use edit-config to open
- Navigate the structure of
- Edit your
Netdata primarily uses the
netdata.conf file to configure its core functionality.
netdata.conf resides within your
Netdata config directory.
The location of that directory and
netdata.conf depends on your operating system and the method you used to install
The most reliable method of finding your Netdata config directory is loading your
netdata.conf on your browser. Open a
tab and navigate to
http://HOST:19999/netdata.conf. Your browser will load a text document that looks like this:
Look for the line that begins with
# config directory = . The text after that will be the path to your Netdata config
In the system represented by the screenshot, the line reads:
config directory = /etc/netdata. That means
netdata.conf, and all the other configuration files, can be found at
For more details on where your Netdata config directory is, take a look at our installation instructions.
For the rest of this tutorial, we'll assume you're editing files or running scripts from within your Netdata configuration directory.
Use edit-config to open
Inside your Netdata config directory, there is a helper scripted called
edit-config. This script will open existing
Netdata configuration files using a text editor. Or, if the configuration file doesn't yet exist, the script will copy
an example file to your Netdata config directory and then allow you to edit it before saving it.
edit-configwill use the
EDITORenvironment variable on your system to edit the file. On many systems, that is defaulted to
nano. We highly recommend
nanofor beginners. To change this variable for the current session (it will revert to the default when you reboot), export a new value:
export EDITOR=nano. Or, make the change permanent.
Let's give it a shot. Navigate to your Netdata config directory. To use
netdata.conf, you need to
have permissions to edit the file. On Linux/macOS systems, you can usually use
sudo to elevate your permissions.
You should now see
netdata.conf your editor! Let's walk through how the file is structured.
The structure of
There are two main parts of the file to note: sections and options.
netdata.conf file is broken up into various sections, such as
section contains the configuration options for some core component of Netdata.
Each section also contains many options. Options have a name and a value. With the option
config directory =
config directory is the name, and
/etc/netdata is the value.
Most lines are commented, in that they start with a hash symbol (
#), and the value is set to a sane default. To
tell Netdata that you'd like to change any option from its default value, you must uncomment it by removing that
Let's try editing the options in
netdata.conf to see how the process works.
First, add a fake option to show you how Netdata loads its configuration files. Add a
test option under the
section and give it the value of
Restart Netdata with
service restart netdata or the appropriate
alternative for your system.
Now, open up your browser and navigate to
http://HOST:19999/netdata.conf. You'll see that Netdata has recognized
that our fake option isn't valid and added a notice that Netdata will ignore it.
Here's the process in GIF form!
Now, let's make a slightly more substantial edit to
netdata.conf: change the Agent's name.
If you edit the value of the
hostname option, you can change the name of your Netdata Agent on the dashboard and a
handful of other places, like the Visited nodes menu and Netdata Cloud.
edit-config to change the
hostname option to a name like
hello-world. Be sure to uncomment it!
Once you're done, restart Netdata and refresh the dashboard. Say hello to your renamed agent!
At this point, you should be comfortable with getting to your Netdata directory, opening and editing
seeing your changes reflected in the dashboard.
Netdata has many more configuration files that you might want to change, but we'll cover those in the following steps of this tutorial.
In the next step, we're going to cover one of Netdata's core functions: monitoring the health of your systems via alarms and notifications. You'll learn how to disable alarms, create new ones, and push notifications to the system of your choosing.