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The Kubernetes yaml shown below describes a networkPolicy. Will the networkPolicy BLOCK this traffic? Solution: a request issued from a pod lacking the tier: api label, to a pod bearing the tier: backend label
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The Kubernetes yaml shown below describes a clusterIP service. Is this a correct statement about how this service routes requests? Solution: Traffic sent to the IP of this service on port 8080 will be routed to port 80 in a random pod with the label aPP: nginx.
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Will this command display a list of volumes for a specific container? Solution: docker volume inspect nginx'

Question 118 - DCA discussion

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An application image runs in multiple environments, with each environment using different certificates and ports. Is this a way to provision configuration to containers at runtime?

Solution. Create a Dockerfile for each environment, specifying ports and Docker secrets for certificates.

A.

Yes

Answers
A.

Yes

B.

No

Answers
B.

No

Suggested answer: B

Explanation:

Creating a Dockerfile for each environment, specifying ports and Docker secrets for certificates is not a way to provision configuration to containers at runtime.A Dockerfile is a text document that contains all the commands a user could call on the command line to assemble an image1. A Dockerfile is used to build an image, not to run a container. Once an image is built, the configuration specified in the Dockerfile cannot be changed at runtime.To provision configuration to containers at runtime, you need to use a different mechanism, such as environment variables, command-line arguments, or config maps234.Reference:

Dockerfile reference | Docker Docs

Environment variables in Compose | Docker Docs

Override the default command | Docker Docs

Configuration management with Containers | Kubernetes

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asked 08/11/2024
Alois Braid
39 questions
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