Introduction to Monitoring

Why Monitoring is Essential in DevOps?

Learning Outcome

5

Recognize monitoring’s role in DevOps workflows

4

Understand what is monitored in real systems

3

Identify different types of monitoring

2

Explain why monitoring is critical for systems and applications

1

Understand what monitoring means in IT and DevOps

Understanding the Concept

Think of a security guard in an office building

If the guard is not watching, problems are noticed only after damage happens

In the same way, IT systems need continuous observation

This continuous observation is called monitoring

Why Monitoring is Essential in DevOps?

DevOps focuses on fast delivery + stable systems

 Monitoring ensures that speed does not break reliability

Issues go unnoticed
 

Downtime increases
 

Users lose trust

Without monitoring

What is Monitoring?

Monitoring is the process of continuously collecting,

observing, and analyzing system data to ensure everything is working properly

It helps answer

Monitoring works before, during, and after problems occur

Is it performing well?

Is something about to fail?

Is the system running?

What Exactly Do We Monitor?

Monitoring observes different layers of a system

Infrastructure

Operating System

We check if the server is healthy

 CPU, memory, disk, and network usage

We check what is running

Inside the system & how much load it has

Application

 Services

We check if the application is working,

How fast it responds, and if errors are happening

We check if databases, web servers, &

APIs are running and responding properly

Types of Monitoring

  • Prevent system crashes​

Focuses on hardware and virtual resources

Infrastructure Monitoring

  • Server up/down status

Purpose

  • Ensure resource availability
  • CPU, memory, disk, network

Monitors

Types of Monitoring

Focuses on how applications behave

Purpose

Monitors

 Application Monitoring

  • Ensure good user experience

  • Detect slow or failing apps

  • ​Application uptime

  • Response time, Errors

Types of Monitoring

Purpose

Performance Monitoring

Focuses on speed and efficiency.

Monitors

  • Identify performance bottlenecks

  • Resource utilization over time

  • Latency, Load handling

  • Improve system efficiency

Types of Monitoring

Purpose

Availability Monitoring

Focuses on system uptime

Monitors

  • Downtime duration

  • Whether services are reachable

  • Ensure systems are

always accessible

Types of Monitoring

Purpose

Alerting

Monitoring systems generate alerts when something goes wrong

  • Disk space nearly full

  • Reduce reaction time

  • Notify teams immediately

Examples

  • CPU exceeds threshold

Monitoring in the DevOps Lifecycle

Monitoring supports DevOps by

Verifying deployments after release

Providing feedback for improvements

Detecting production issues early

It creates a loop

Deploy → Monitor → Analyze → Improve

Key Points

Alerts are triggered automatically

Monitoring collects metrics, not logs

Metrics are numerical values measured over time

Thresholds define safe and unsafe limits

Summary

4

DevOps without monitoring is incomplete

3

Different types of monitoring cover different layers

2

It is essential for stability and reliability

1

Monitoring means continuous system observation

Quiz

Which of the following is an example of monitoring?

 

A. Writing a script

B. Checking CPU usage regularly

C. Deploying code

D. Creating a user account

Answer

Which of the following is an example of monitoring?

 

A. Writing a script

B. Checking CPU usage regularly

C. Deploying code

D. Creating a user account