( Kubernetes Certification Training: https://www.edureka.co/kubernetes-certification ) This Edureka tutorial on "Kubernetes Deployment Tutorial " will help you understand the various concepts related to Deployment in Kubernetes. The topics included in this session are: 1. What is Kubernetes? 2. What is a Pod? 3. Replication Controller & ReplicaSet 4. Deployment Controllers 5. Deployment Use-Cases DevOps Tutorial Blog Series: https://goo.gl/P0zAfF Follow us to never miss an update in the future. Instagram: https://www.instagram.com/edureka_learning/ Facebook: https://www.facebook.com/edurekaIN/ Twitter: https://twitter.com/edurekain LinkedIn: https://www.linkedin.com/company/edureka

2. Kubernetes Certification Training www.edureka.co/kubernetes-certification
Topics For Today’s Session
❖ W h a t i s K u b e r n e t e s ?
❖ W h a t i s a P o d ?
❖ R e p l i c a t i o n C o n t r o l l e r
❖ R e p l i c a S e t
❖ D e p l o y m e n t C o n t r o l l e r s
❖ D e p l o y m e n t U s e - C a s e s

3. Kubernetes Certification Training www.edureka.co/kubernetes-certification
What is Kubernetes?
Google’s
Brainchild.
Now, donated
to CNCF
Groups
containers
into logical
units
Open source
and portable
platform
Automates
scaling of
workloads
Groups
containers
into logical
units
A container
orchestration
tool
Written in Go
programming
language

4. Kubernetes Certification Training www.edureka.co/kubernetes-certification
Used for applications which are dependent
on other applications/services for their
functioning.
Is widely used when a container runs on a
physical machine on top of an operating
system.
What is a Pod?
Pod 1
Container Image
Pod 2
Container Image
Container Image
Pod is the basic unit of Kubernetes. A pod can consist of one or more container images.

5. Kubernetes Certification Training www.edureka.co/kubernetes-certification
Replication Controller
Replication Controller is one of the key features of Kubernetes, and is responsible for managing the pod
lifecycle. It owns the responsibility for making sure that the specified number of pod replicas are running at
any given point of time.

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ReplicaSets
ReplicaSet ensures how many replica of pod should be running. It can be considered as a replacement of
replication controller.

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Deployment Controllers
Deployment Controller are declarative in
nature to provide the required information /
updates to pods and ReplicaSets.
Deployment Controller changes the actual
state of the defined desired state of controller
object.

8. Kubernetes Certification Training www.edureka.co/kubernetes-certification
Update Deployment
Pause the
deployment to apply
multiple fixes and
then the deployment
can be resumed.
Pause the Deployment
Use – Case 5
Each and every
deployment can
be scaled up or
scaled down
based on the
requirement.
Scale a Deployment
Use – Case 4
Used in case
when the current
state of the
deployment is not
stable. Only the
container image
gets updated..
Use – Case 3
A new ReplicaSet
is created and the
Deployment is
updated. Each
new ReplicSet
updates the
revision of
Deployment.
Use - Case 2
A deployment is
created. Once that
is done the
ReplicaSet
automatically
creates Pods in the
background.
Use - Case 1
Create a Deployment
Rollback Deployment
Deployment Use-Cases

9. Kubernetes Certification Training www.edureka.co/kubernetes-certification
Use – Case: 1 : Create a Deployment
Let us create a deployment and see how the
ReplicaSets run in the background.
Kubectl create deployment.yaml
Kubectl get deployments

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Use – Case: 2 : Update Deployments
Let us update the previous deployment and see how
the container image gets updated.
Kubectl edit
deployment/deploymentname
Kubectl rollout status deployment
deploymentname

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Use – Case: 3 : Rollback Deployment
Let us roll back to a previous deployment to see the
history of Deployments.
kubectl rollout history
deployment/deploymentname
kubectl rollout undo
deployment/deploymentname

12. Kubernetes Certification Training www.edureka.co/kubernetes-certification
Use – Case: 4 : Scale up a Deployment
Let us scale up or scale down a deployment based on
the requirements.
kubectl scale deployment
deploymentname --replicas=4
kubectl autoscale deployment
nginx-deployment

13. Kubernetes Certification Training www.edureka.co/kubernetes-certification
Use – Case: 5 : Pause a Deployment
Let us pause a deployment, apply the required fixes
and then resume back the deployment.
kubectl rollout pause
deployment/deploymentname
kubectl rollout resume
deploy/deploymentname