#WHAT IS KUBERNETES SIMPLE EXPLANATION UPDATE#

Image = NEW_CONTAINER_IMAGE | -f NEW_CONTROLLER_SPEC) $ kubectl rolling-update OLD_CONTROLLER_NAME (. Replaces the specified replication controller with a new replication controller by updating a POD at a time.

#WHAT IS KUBERNETES SIMPLE EXPLANATION UPDATE#

Kubectl rolling-update − Performs a rolling update on a replication controller. Kubectl replace − Capable of replacing a resource by file name or stdin. Kubectl port-forward − They are used to forward one or more local port to pods. If the POD has only one container there is no need to define its name. Printing the logs can be defining the container name in the pod. Kubectl logs − They are used to get the logs of the container in a pod. Go-template=.|go-template-file=.|jsonpath=.|jsonpath-file=.] $ kubectl get [(-o|-output=)json|yaml|wide|custom-columns=.|custom-columnsfile=.| Kubectl get − This command is capable of fetching data on the cluster about the Kubernetes resources. $ kubectl expose –f tomcat.yaml –port = 80 –target-port = $ kubectl expose rc tomcat –-port=80 –target-port = 30000 $ kubectl expose (-f FILENAME | TYPE NAME) This has the capability to expose it via a running container or from a yaml file. Kubectl expose − This is used to expose the Kubernetes objects such as pod, replication controller, and service as a new Kubernetes service. This allows to directly edit a resource which one can receive via the command line tool. Kubectl edit − It is used to end the resources on the server. This will mark the node as unavailable so that it should not be assigned with a new container which will be created. Kubectl drain − This is used to drain a node for maintenance purpose. Shows details of resource or a group of resources. Kubectl describe − Describes any particular resource in kubernetes. Kubectl delete − Deletes resources by file name, stdin, resource and names. In the same way, we can create multiple things as listed using the create command along with kubectl. To do this, JSON or YAML formats are accepted. Kubectl create − To create resource by filename of or stdin. Kubectl cp − Copy files and directories to and from containers. $ kubectl config view –o = 'e2e')].user.password}' Kubectl config use-context − Sets the current context in kubectl file. $ kubectl config unset PROPERTY_NAME PROPERTY_VALUE

Kubectl config unset − It unsets a specific component in kubectl. $ kubectl config set PROPERTY_NAME PROPERTY_VALUE Kubectl config set − Sets an individual value in kubeconfig file. $ kubectl config set-credentials cluster-admin -username = vipin. Kubectl config set-credentials − Sets a user entry in kubeconfig. $ kubectl config set-context prod –user = vipin-mishra Kubectl config set-context − Sets a context entry in kubernetes entrypoint. $ kubectl config set-cluster NAME [-certificateauthority = Kubectl config set-cluster − Sets the cluster entry in Kubernetes. Kubectl config get-contexts − Describes one or many contexts. Kubectl config get-clusters − Displays cluster defined in the kubeconfig. Kubectl config delete-context − Deletes a specified context from kubeconfig.

Kubectl config delete-cluster − Deletes the specified cluster from kubeconfig. Kubectl config current-context − It displays the current context. Kubectl config − Modifies the kubeconfig file. $ kubectl cluster-info dump -output-directory = /path/to/cluster-state Kubectl cluster-info dump − It dumps relevant information regarding cluster for debugging and diagnosis. Kubectl cluster-info − It displays the cluster Info. $ kubectl autoscale deployment foo -min = 2 -max = 10 $ kubectl autoscale (-f FILENAME | TYPE NAME | TYPE/NAME). Kubectl autoscale − This is used to auto scale pods which are defined such as Deployment, replica set, Replication Controller. $ kubectl attach 123456-7890 -c tomcat-conatiner Kubectl attach − This attaches things to the running container. Kubectl apply − It has the capability to configure a resource by file or stdin. Kubectl api-versions − It prints the supported versions of API on the cluster. Kubectl annotate pods tomcat description = 'my frontend'

$kubectl annotate (-f FILENAME | TYPE NAME) KEY_1=VAL_1. Kubectl annotate − It updates the annotation on a resource. In this chapter, we will discuss a few commands used in Kubernetes via kubectl. Kubectl commands are used to interact and manage Kubernetes objects and the cluster. It has the capability to manage the nodes in the cluster. It is one of the key components of Kubernetes which runs on the workstation on any machine when the setup is done.

What is kubernetes simple explanation