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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
Does this command create a swarm service that only listens on port 53 using the UDP protocol? Solution. 'docker service create -name dns-cache -p 53:53 -constraint networking.protocol.udp=true dns-cache'
Is this a supported user authentication method for Universal Control Plane? Solution. x.500
Will this command display a list of volumes for a specific container? Solution. 'docker container logs nginx --volumes'
Is this a way to configure the Docker engine to use a registry without a trusted TLS certificate? Solution. Set INSECURE_REGISTRY in the' /etc/docker/default' configuration file.
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.
A Kubernetes node is allocated a /26 CIDR block (64 unique IPs) for its address space. If every pod on this node has exactly two containers in it, how many pods can this address space support on this node?
Will this command list all nodes in a swarm cluster from the command line? Solution. 'docker inspect nodes
A user's attempts to set the system time from inside a Docker container are unsuccessful. Could this be blocking this operation? Solution. SELinux
Will this command display a list of volumes for a specific container? Solution: docker volume inspect nginx'

Question 32 - DCA discussion

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One of several containers in a pod is marked as unhealthy after failing its livenessProbe many times. Is this the action taken by the orchestrator to fix the unhealthy container?

Solution: The unhealthy container is restarted.

A.

Yes

Answers
A.

Yes

B.

No

Answers
B.

No

Suggested answer: A

Explanation:

A liveness probe is a mechanism for indicating your application's internal health to the Kubernetes control plane. Kubernetes uses liveness probes to detect issues within your pods.When a liveness check fails, Kubernetes restarts the container in an attempt to restore your service to an operational state1. Therefore, the action taken by the orchestrator to fix the unhealthy container is to restart it.Reference:

Content trust in Docker | Docker Docs

Docker Content Trust: What It Is and How It Secures Container Images

A Practical Guide to Kubernetes Liveness Probes | Airplane

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asked 08/11/2024
Roberto Garavaglia
45 questions
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