Kubernetes exists to solve problems that appear when running containers in production.

If you run containers manually:

• You must restart failed containers
• You must handle scaling yourself
• You must manage networking manually

This becomes impossible at scale.

In production:

• Containers crash
• Servers fail
• Traffic increases suddenly

Kubernetes automatically:

• Restarts failed containers
• Replaces unhealthy pods
• Reschedules workloads to healthy nodes

Traffic is not constant:

• Peak hours → high traffic
• Off-peak → low traffic

Kubernetes supports:

• Horizontal scaling (add/remove pods automatically)

Without Kubernetes:

• Deployments differ across environments

With Kubernetes:

• Same YAML works everywhere (dev, staging, prod)

Kubernetes works across:

• AWS
• GCP
• Azure
• On-prem servers

So you avoid vendor lock-in.

Kubernetes exists to make systems:

• Automated
• Scalable
• Reliable
• Portable