Step by Step to Install Sensu Monitoring Tool on Ubuntu 20.04 LTS

Sensu is a free & open-source monitoring tool.It is used for monitor servers, services, applications and send notification via e-mail. It helps to collects  system metrics such as CPU, memory, and disk usage.

There are three kinds on Sensu components:

Sensu-backend: Sensu-backend is used to perform monitoring operations.
Sensuctl: It used to monitor resources.
Agent: To install the agent on a system that we want to monitor.

Step 1: Update the System.

apt-get update

Step 2: Install the required packages.

apt-get install curl gnupg unzip wget

Step 3: Install Sensu-backend Repo on system.

curl -s https://packagecloud.io/install/repositories/sensu/stable/script.deb.sh | bash

  • Here is the command output.

  • Update the packages.

apt-get update

  • Install Sensu-backend.

apt-get install sensu-go-backend

Step 4: Download the Sensu configuration file.

curl -L https://docs.sensu.io./sensu-go/latest/files/backend.yml -o /etc/sensu/backend.yml

Step 5: Start & Enable Sensu backend service.

systemctl start sensu-backend
systemctl enable sensu-backend

  • Check the status of Sensu backend service.

systemctl status sensu-backend

  • Here is the command output.

Step 6: Open the following port number on UFW firewall.

ufw allow 3000/tcp

  • Check the port number 3000 is running or not using the following command.

ss -antpl | grep 3000

  • Here is the command output.

Step 7: Set the Sensu credentials.

sensu-backend init --interactive

  • Provide the user-name & password.
  • Here is the command output.

Step 8: Access the Sensu web-interface.

http://server-ip:3000

  • Here is the output.
  • Provide the user-name & password.
  • Click on Sign IN.

  • Now Sensu monitoring tool is Ready.

 

Step 9: Now, download the Sensuctl repo on System.

curl -s https://packagecloud.io/install/repositories/sensu/stable/script.deb.sh | bash

  • Here is the command output.

  • Install Sensuctl on system.

apt-get install sensu-go-cli

  • Configure the Sensuctl.

sensuctl configure

  • Provide the following values:

? Authentication method: username/password
? Sensu Backend URL: http://127.0.0.1:8080
? Namespace: default
? Preferred output format: tabular
? Username: admin
? Password: *********

  • Here is the command output.

Step 10: Install Sensu Go Agent on system.

apt-get install sensu-go-agent

  • Download the Sensu Go Agent configuration file.

curl -L https://docs.sensu.io/sensu-go/latest/files/agent.yml -o /etc/sensu/agent.yml

Step 11: Start the Sensu Go Agent.

service sensu-agent start

  • Check the status of Sensu Go Agent.

service sensu-agent status

  • Here is the command output.

Step 12: Go to Sensu web-interface & Refresh the page.We can see the following changes.

  • Click on Entities & select Agent ip-address.

 

  • Click on Keepalive.

  • We can see some information related to Agent System.

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