Kubectl controls the Kubernetes Cluster . It is one of the key components of Kubernetes which runs on the workstation on any machine when the setup is done. It has the capability to manage the nodes in the cluster. Kubectl commands are used to interact and manage Kubernetes objects and the cluster.
What does kubectl create command do?
The kubectl create service command creates the configuration for the Service and saves it to /tmp /srv. yaml . The kubectl create –edit command opens the configuration file for editing before it creates the object.
What is Kubectl create?
In contrast, the command set kubectl create is the command you use to create a Kubernetes resource directly at the command line . This is an imperative usage. You can also use kubectl create against a manifest file to create a new instance of the resource. However, if the resource already exists, you will get an error.
When to use kubectl apply and kubectl create?
kubectl create = Creates a new k8s resource in the cluster . kubectl replace = Updates a resource in the live cluster. kubectl apply = If I want to do create + replace (Reference)
What does kubectl create secret do?
When creating a Secret, you can specify its type using the type field of a Secret resource, or certain equivalent kubectl command line flags (if available). The type of a Secret is used to facilitate programmatic handling of different kinds of confidential data .
How do I get kubectl?
- Check that kubectl is correctly installed and configured by running the kubectl cluster-info command: kubectl cluster-info. ...
- You can also verify the cluster by checking the nodes.
Where are kubectl commands executed?
- kubectl [command] [TYPE] [NAME] [flags]
- kubectl [command] [TYPE] [NAME] -o <output_format>
What does kubectl apply mean?
The command set kubectl apply is used at a terminal’s command-line window to create or modify Kubernetes resources defined in a manifest file . ... The state of the resource is declared in the manifest file, then kubectl apply is used to implement that state.
How do you run a pod in kubectl?
You can now run the command kubectl get pods to see the status of your pod. To view the entire configuration of the pod, just run kubectl describe pod nginx in your terminal. The terminal will now display the YAML for the pod, starting with the name nginx, its location, the Minikube node, start time and current status.
How do you stop a pod in kubectl?
- As the root user, enter the following command to stop the Kubernetes worker nodes: ...
- Stop all worker nodes, simultaneously or individually.
- After all the worker nodes are shut down, shut down the Kubernetes master node. ...
- Stop the NFS server next.
What is difference between kubectl and Kubelet?
kubelet: the component that runs on all of the machines in your cluster and does things like starting PODs and containers. kubectl: the command line until to talk to your cluster.
What happens when we do kubectl apply?
After validation, kubectl begins assembling the HTTP request it will send to kube-apiserver . All attempts to access or change state in the Kubernetes system goes through the API server, which in turns communicates with etcd.
What does kubectl replace do?
The kubectl replace completely replaces the existing resource with the one defined by the provided spec . replace wants a complete spec as input, including read-only properties supplied by the API like .
Are k8s secrets secure?
To this end, Kubernetes provides an object called Secret, which you can use to store sensitive data. ... Placing sensitive info into a secret object does not automatically make it secure. By default, data in Kubernetes secrets is stored in Base64 encoding , which is practically the same as plaintext.
How do you make a secret with kubectl?
Create the Secret
Apply the directory containing the kustomization. yaml to create the Secret. kubectl apply -k . Note that when a Secret is generated, the Secret name is created by hashing the Secret data and appending the hash value to the name.
How do you get the secret in kubectl?
You can use kubectl get secrets /db-user-pass -o yaml or -o json where you’ll see the base64-encoded username and password . You can then copy the value and decode it with something like echo <ENCODED_VALUE> | base64 -D (Mac OS X). Note: on GNU/Linux, the base64 flag is -d , not -D .
