Updating an application
You can use
kubectl set
to make changes to an object’s image , resources (compute resource such as CPU and memory), or selector fields. The kubectl set image command updates the nginx image of the Deployment’s Pods one at a time.
How do I run a command in deployment?
Run the Deployment
When you’ve created a command file for your target environment, you should be able to complete the entire deployment by simply running the file. On your developer workstation, open Windows Explorer, and then browse to the location of the Publish-Dev. cmd file.
Double-click the file to run it
.
What command would you use to create a deployment?
You can create a Deployment using
the kubectl apply
, or kubectl create commands. Once created, the Deployment ensures that the desired number of Pods are running and available at all times.
How do you deploy in Kubernetes?
- Package a sample web application into a Docker image.
- Upload the Docker image to Artifact Registry.
- Create a GKE cluster.
- Deploy the sample app to the cluster.
- Manage autoscaling for the deployment.
- Expose the sample app to the internet.
- Deploy a new version of the sample app.
What is the use of deployment in Kubernetes?
A Kubernetes Deployment is used
to tell Kubernetes how to create or modify instances of the pods that hold a containerized application
. Deployments can scale the number of replica pods, enable rollout of updated code in a controlled manner, or roll back to an earlier deployment version if necessary.
What is difference between build and deploy?
Deploy should mean
take all of my artifacts
and either copy them to a server, or execute them on a server. It should truly be a simple process. Build means, process all of my code/artifacts and prepare them for deployment. Meaning compile, generate code, package, etc.
How do I run a command inside a pod?
- Use kubectl exec to open a bash command shell where you can execute commands. kubectl exec -it pod-name — /bin/bash. The following example gets a shell to the suitecrm-0 pod: …
- Use kubectl exec to execute commands directly. kubectl exec -it pod-name — /bin/bash -c ” command(s) “
What is the difference between ReplicaSet and Deployment?
A ReplicaSet ensures that a specified number of
pod replicas
are running at any given time. However, a Deployment is a higher-level concept that manages ReplicaSets and provides declarative updates to Pods along with a lot of other useful features.
What’s the difference between a blue green Deployment and a rolling Deployment?
The difference between the rolling and blue/green strategies is that in a rolling strategy,
the infrastructure is not in a separate network or environment like in blue/green
. Like in-place deployments, rolling deployments suffer from a risky rollback if issues occur during deployment.
What does a Deployment automatically create?
A Deployment provides declarative updates for
Pods and ReplicaSets
. … You can define Deployments to create new ReplicaSets, or to remove existing Deployments and adopt all their resources with new Deployments.
What is Kubernetes vs Docker?
A fundamental difference between Kubernetes and Docker is that
Kubernetes is meant to run across a cluster while Docker runs on a single node
. Kubernetes is more extensive than Docker Swarm and is meant to coordinate clusters of nodes at scale in production in an efficient manner.
Can Kubernetes run without Docker?
Quite the contrary; Kubernetes can run without Docker and Docker can function without Kubernetes. … Kubernetes can then allow you to automate container provisioning, networking, load-balancing, security and scaling across all these nodes from a single command line or dashboard.
What is difference between service and deployment in Kubernetes?
What’s the difference between a Service and a Deployment in Kubernetes?
A deployment is responsible for keeping a set of pods running
. A service is responsible for enabling network access to a set of pods. … The deployment could be scaled up and down and pods could be replicated.
What is purpose of deployment Yaml?
Kubernetes Deployment is the process of
providing declarative updates to Pods and ReplicaSets
. It allows users to declare the desired state in the manifest (YAML) file, and the controller will change the current state to the declared state.
What are the specs declared in deployment?
Under spec,
we declare the desired state and characteristics of the object we want to have
. For example, in deployment spec, we would specify the number of replicas, image name etc. Kubernetes will make sure all the declaration under the spec is brought to the desired state. Spec has three important subfields.
What is Kubernetes interview questions?
- What is Kubernetes? …
- What are K8s? …
- What is orchestration when it comes to software and DevOps? …
- How are Kubernetes and Docker related? …
- What are the main differences between the Docker Swarm and Kubernetes? …
- What are the main components of Kubernetes architecture?
