How to Install and Configure Sensu Monitoring on CentOS 7
Introduction
Sensu is a free and open source monitoring solution that can be used to monitor server, application and various system services.
Sensu is written in Ruby that uses RabbitMQ to handle messages and Redis to store data. If you want to monitor your entire cloud environment, then Sensu may be a good option for you.
In this tutorial, we will cover the process of installing and configuring a Sense monitoring server on CentOS 7.
Prerequisites
- A Minimal install of CentOS 7.
- A sudo user.
Step 1: Update the System
Update the system packages and kernel to the latest available version:
sudo yum update -ysudo shutdown -r now
Step 2: Installing Erlang
By default erlang
is not available in default CentOS repositories. It is however available in the EPEL
repository.
You can install the EPEL using the following command:
sudo yum install epel-release -y
Then we can install erlang
:
sudo yum install erlang -y
Step 3: Installing RabbitMQ and Redis
To install RabbitMQ, we need to add its key as follows:
sudo rpm --import http://www.rabbitmq.com/rabbitmq-signing-key-public.asc
Then, install the latest version of RabbitMQ using the following command:
sudo rpm -Uvh http://www.rabbitmq.com/releases/rabbitmq-server/current/rabbitmq-server-3.6.6-1.el7.noarch.rpm
Enable the RabbitMQ management console using the following command:
sudo rabbitmq-plugins enable rabbitmq_management
Next, we will be installing Redis
:
sudo yum install redis -y
Finally, we will start the RabbitMQ and Redis services and enable them to auto-start:
sudo systemctl start rabbitmq-serversudo systemctl enable rabbitmq-serversudo systemctl start redis
The next step is to create a RabbitMQ vhost, username, and password as follows:
sudo rabbitmqctl add_vhost /sensusudo rabbitmqctl add_user sensu sensusudo rabbitmqctl set_permissions -p /sensu sensu ".*" ".*" ".*"
Note: You should consider using a more secure password.
Step 4: Installing Sensu and Uchiwa
To install Sensu, we need to create a yum
repository for in /etc/yum.repos.d
:
sudo nano /etc/yum.repos.d/sensu.repo
Add the following lines:
[sensu]name=sensu-mainbaseurl=http://repos.sensuapp.org/yum/el/7/x86_64/gpgcheck=0enabled=1
Then save and close the file.
Next, install Sensu
and Uchiwa
using the following command:
sudo yum install sensu uchiwa -y
Sense has an example configuration file which can be used:
sudo cp /etc/sensu/config.json.example /etc/sensu/config.json
Start Sensu
and Uchiwa
and enable auto-start:
sudo systemctl start sensu-serversudo systemctl start sensu-clientsudo systemctl start sensu-apisudo systemctl start uchiwasudo systemctl enable sensu-serversudo systemctl enable sensu-clientsudo systemctl enable sensu-apisudo systemctl enable uchiwa
Step 5: Accessing Sensu
By default Sensu
runs on port 3000
which is not enabled in firewalld
by default. As such, we need to manually add it:
sudo firewall-cmd --permanent --zone=public --add-port=3000/tcpsudo firewall-cmd --reload
To access the Sensu
web UI, visit http://192.168.15.110:3000
in your browser.
This concludes our tutorial, thank you for reading.
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