Section 9: Networking (26-29)

If Kubernetes is deployed manually, it deploys a DNS Server by default.

• True

• False

What's true about services?

• Kubernetes services do not support load balancing.

• Services in Kubernetes can only be accessed from outside the cluster.

• Kubernetes services must be recreated every time a new pod is added.

• Kubernetes maps the service name to the IP of the service.

According to the attached image.

Type the full command to reach the "web-service" service from the test Pod.

What of the following sentences is true?

• Kubernetes services have static IP addresses that never change.

• DNS names for Kubernetes services are not supported within the cluster.

• Kubernetes requires manual DNS configuration for each service.

• For each service, the DNS Server creates a subdomain with the namespace name.

What of the following sentences is true?

• Kubernetes groups services based on their labels in DNS.

• All the services are further grouped together into another subdomain called SVC.

• All services are grouped under the Pods subdomain.

• Services in different namespaces share the same DNS subdomain.

What of the following sentences is true?

• All services and pods are grouped under the global domain.

• Kubernetes uses the same domain name for services and pods without any namespace distinction.

• All services and Pods are grouped together into a root domain for the cluster, which is set to cluster.local by default.

• Pods and services are grouped under the default subdomain regardless of their namespace.

According to the attached image.

Type the full command to reach the web-service using the FQDN of the service (root domain) from the test Pod.

What of the following sentences is true?

• Pods automatically receive DNS names for external access by default.

• Records for Pods are not created by default, but we can enable it explicitly.

• Each Pod gets a unique DNS record by default in every namespace.

• Pods have a default DNS record for internal cluster discovery without configuration.

After DNS records for Pods are enabled, what would be the hostname for a Pod with the IP address 10.244.2.5?

We have the Pod web with the IP address 10.244.2.5.

Type the full curl command to reach that Pod by using its FQDN.