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- How certifcations based auth works??
In Certification based authentication, digital certificates are used to validate a user, machine or application, before granting access. These are easy to create, delete or rollback. Certificate based authentication is fast and easy to use. - Write a diff between Create vs Apply and Put Vs Post and define IDEOMPOTENCY?
Put:- in case of put create new object. it is ideompotent. it will replace a object.
Post:- insert or update , even if object is already present. it is not ideompotent and will create new iteam each item with different id.
Kubectl apply :- works on any of the attributes. Any attribute can be updated.
kubectle create :- works on all the attributes. All attributes should be there. will fail if used with replace. or any attribute is missing.
IDEOMPOTENCY:- means creation or modification of resouces based on the existing condition, there will be no change if the requested changes already exist. - What is diff between kubectl exec and kubectl attach?
kubectl attach :- attach to a running container.
kubectl exec :- is to execute a command in a container. - What is diff between docker exec and docker attach?
Docker attach is used to attach a containers input/output and error streams to a docker container.
Docker exec is used to connect and run command directly to the container.