➢ Kubernetes is an open-source container management tool which automates container deployment, container scaling and load balancing.
➢ It schedules, runs and manages isolated containers which are running on virtual/ physical/ cloud machines.
➢ All top cloud providers support Kubernetes.
➢ Google developed an internal system called ‘borg’ (later named as omega) to deploy and manage thousands of google applications and services on their cluster.
➢In 2014, google introduced Kubernetes as an open-source platform written in Golang and later donated to CNCF (Cloud Native Computing Foundation).
Online platform for K8s:
- Kubernetes playground
- Play with K8s
- Play with Kubernetes classroom
Cloud-based K8s services:
- GKE: Google Kubernetes Services
- AKS: Azure Kubernetes services
- Amazon EKS: Amazon Elastic Kubernetes Services
Kubernetes installation tool:
Problems with scaling up the containers:
➢ Containers cannot communicate with each other.
➢ Autoscaling and load balancing was not possible.
➢ Containers had to be managed carefully.
Features of Kubernetes:
➢ Orchestration (clustering of any number of containers running on different networks)
➢ Autoscaling (supports both horizontal and vertical scaling)
➢ Load balancing
➢ Platform independent (cloud/ virtual/ physical) ➢ Fault tolerance (node/ POD failure)
➢ Rollback (going back to the previous version)
➢ Health monitoring of containers
➢ Batch execution (one time, sequential, parallel)
Installation and cluster configuration
Complicated and time consuming
Fast and easy
K8s can work with almost all container types like rocket, docker, container
Work with docker only
GUI not available
Only shared with containers in the same POD
Can be shared with any other containers
Update and rollback
Process scheduling to maintain services while updating
Progressive updates and service health monitoring throughout the update
Support vertical and horizontal autoscaling
Not support autoscaling
|Logging and monitoring|
Inbuilt tool present for monitoring
Used 3rd party tools like splunk