You want to enable your running Google Kubernetes Engine cluster to scale as demand for your application changes.
What should you do?
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A. B. C. D.C.
The correct answer for this question is C - Update the existing Kubernetes Engine cluster with the following command: gcloud alpha container clusters update mycluster --enable-autoscaling --min-nodes=1 --max-nodes=10.
Here's a detailed explanation of why this answer is correct and why the other options are incorrect:
A - Add additional nodes to your Kubernetes Engine cluster using the following command: gcloud container clusters resize CLUSTER_Name "--size 10"
This command allows you to add additional nodes to your cluster, but it doesn't enable autoscaling. Autoscaling is important because it allows your cluster to automatically adjust the number of nodes based on demand. Without autoscaling, you would need to manually add and remove nodes, which can be time-consuming and inefficient.
B - Add a tag to the instances in the cluster with the following command: gcloud compute instances add-tags INSTANCE --tags enable-autoscaling max-nodes-10
This command adds a tag to the instances in the cluster, but it doesn't actually enable autoscaling. The tag "max-nodes-10" doesn't have any special meaning in this context, and it won't affect the behavior of the cluster. Additionally, tags are used for a variety of purposes in Google Cloud, so it's important to use them correctly and in the right context.
D - Create a new Kubernetes Engine cluster with the following command: gcloud alpha container clusters create mycluster --enable-autoscaling --min-nodes=1 --max-nodes=10 and redeploy your application.
This option would work, but it's not the most efficient solution. Creating a new cluster requires more time and effort than updating an existing one, and it may cause disruption to your application. Updating an existing cluster is typically faster and easier than creating a new one, and it allows you to keep your existing configuration and settings.
C - Update the existing Kubernetes Engine cluster with the following command: gcloud alpha container clusters update mycluster --enable-autoscaling --min-nodes=1 --max-nodes=10.
This is the correct answer because it enables autoscaling for the existing cluster and sets the minimum and maximum number of nodes. This means that the cluster will automatically adjust the number of nodes based on demand, and it will never go below one node or above ten nodes. This is a more efficient and effective solution than the other options because it allows you to scale your cluster dynamically and without manual intervention.