Monitoring

Monitoring from the command line

The easiest way to see the server load is through the CLI:

sudo apt install htop -y
htop

But we will analyze a more complex one, however, due to the truncated functions, it is easily configured and everyone can install it without any problems.

Netdata

To write an article and test this method, I took the article of the same name from Digital Ocean.

The advantage of Netdata is that you can monitor the server from any device without entering the terminal.

sudo apt update && sudo apt upgrade -y

Installing the necessary dependencies

sudo apt-get install zlib1g-dev uuid-dev libmnl-dev gcc make autoconf autoconf-archive autogen automake pkg-config curl
sudo apt-get install python python-yaml python-mysqldb python-psycopg2 nodejs lm-sensors netcat

In the last command above, we have to install the recommended but optional packages, but in practice libmnl-dev is not installed (Ubuntu 20.04) which leads to errors in further installation. Therefore, we do the following:

# Looking for available packages libuv:
apt-cache search libuv

# Install:
sudo add-apt-repository ppa:acooks/libwebsockets6
sudo apt-get update
sudo apt-get install libuv1.dev

# Just in case, install:
sudo apt install python3
sudo apt install libffi-dev
sudo apt install python3-dev
sudo apt install python3-virtualenv
sudo apt-get install python3-venv
sudo apt-get install python3-dev
sudo apt-get install gcc -y
sudo apt install python3-pip
sudo apt install build-essential -y
sudo apt install build-essential python3-dev python3-pip

The preparation is over. We clone the Netdata repository from GitHub and go to the copied directory:

git clone https://github.com/firehol/netdata.git --depth=1 ~/netdata
cd ~/netdata

Building and installing the Netdata package:

sudo ./netdata-installer.sh

We open port 19999, since this port is used by NetData servers. In order to understand how UFW works - an article from DigitalOcean "Initial server setup".

sudo ufw allow 19999/tcp

🎉Done! It remains to replace your_server_ip with the IP of the server, and see the result in the browser:

http://your_server_ip:19999/