Exam Professional Cloud Developer topic 1 question 20 discussion

I will go with Option B for this. RollingUpdate: New pods are added gradually, and old pods are terminated gradually Recreate: All old pods are terminated before any new pods are added Question ask us to retain current version hence rolling update is better option here.

https://cloud.google.com/kubernetes-engine/docs/concepts/cluster-upgrades: "The simplest way to take advantage of surge upgrade is to configure maxSurge=1 maxUnavailable=0. This means that only 1 surge node can be added to the node pool during an upgrade so only 1 node will be upgraded at a time. This setting is superior to the existing upgrade configuration (maxSurge=0 maxUnavailable=1) because it speeds up Pod restarts during upgrades while progressing conservatively." Answer is B

B. Set the Deployment strategy to RollingUpdate with maxSurge set to 1, maxUnavailable set to 0: maxSurge set to 1 allows the Deployment to exceed the desired number of Pods by one, permitting the creation of an additional new Pod before terminating the old ones, which aligns with the requirement. maxUnavailable set to 0 ensures that all existing Pods must remain available during the update, which again meets the requirement.

"maxSurge=1" means that at least one VM has to stay up during the RU process.

Option B is the correct one.

To deploy at least 1 replica of the new version and maintain the previous replicas until the new replica is healthy, you should set the Deployment strategy to RollingUpdate with maxSurge set to 1 and maxUnavailable set to 0 (B). The RollingUpdate Deployment strategy allows you to specify the number of replicas that can be created or removed at a time as part of the update process. The maxSurge parameter specifies the maximum number of replicas that can be created in excess of the desired number of replicas, and the maxUnavailable parameter specifies the maximum number of replicas that can be unavailable at any given time. By setting maxSurge to 1 and maxUnavailable to 0, you are telling the Deployment to create at least 1 new replica of the new version and to maintain all of the previous replicas until the new replica is healthy. This will ensure that at least 1 replica of the new version is always available, while allowing the Deployment to gradually roll out the update to the rest of the replicas.

B is obvious

B is correct

B is correct

Obviously it's B

Answer is B

Answer is B

the answer is B.

Recreate can't be maintain previous replica. Answer must be B.

B is correct answer

You are not maintaining anything with Recreate strategy