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| Section | Objectives |
|---|---|
| Topic 1: Storage and Volumes | - Data persistence in Docker
|
| Topic 2: Docker Installation & Configuration | - Docker Engine setup and configuration
|
| Topic 3: Security | - Docker security fundamentals
|
| Topic 4: Networking | - Docker networking concepts
|
| Topic 5: Orchestration | - Container orchestration basics
|
| Topic 6: Troubleshooting | - Diagnostics and debugging
|
| Topic 7: Image Creation, Management, and Registry | - Docker images lifecycle
|
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NEW QUESTION # 128
You are troubleshooting a Kubernetes deployment called api, and want to see the events table for this object.
Does this command display it?
Solution:kubectl get deployment api
Answer: B
Explanation:
The command kubectl get deployment api will only show the status of the deployment object, such as the number of replicas, available pods, and updated pods1. It will not display the events table for the deployment, which contains information about the creation, scaling, and updating of the deployment and its pods2. To see the events table for the deployment, you need to use the kubectl describe deployment api command, which will show the details of the deployment object, including the events3. Alternatively, you can use the kubectl get events --field-selector involvedObject.name=api command, which will filter the events by the name of the involved object4. Reference:
Kubectl: Get Deployments - Kubernetes - ShellHacks
Events in Kubernetes | Kubernetes
kubectl Cheat Sheet | Kubernetes
kubernetes - kubectl get events only for a pod - Stack Overflow
NEW QUESTION # 129
You add a new user to the engineering organization in DTR.
Will this action grant them read/write access to the engineering/api repository?
Solution. Mirror the engineering/api repository to one of the user's own private repositories.
Answer: B
Explanation:
Explanation
Mirroring the engineering/api repository to one of the user's own private repositories does not grant them read/write access to the engineering/api repository. Mirroring is a feature that allows you to automatically replicate images from one repository to another, either within the same DTR or across different DTRs.
Mirroring does not change the permissions or access levels of the source or destination repositories. It only copies the images and tags from one repository to another. To grant a user read/write access to the engineering/api repository, you need to add them as a collaborator with read/write role on that repository, or add them to a team that has read/write role on that repository. References:
https://docs.docker.com/ee/dtr/user/manage-images/mirror-repository-images/,
https://docs.docker.com/ee/dtr/user/manage-repositories/set-repository-permissions/
NEW QUESTION # 130
Two development teams in your organization use Kubernetes and want to deploy their applications while ensuring that Kubernetes-specific resources, such as secrets, are grouped together for each application.
Is this a way to accomplish this?
Solution. Create a collection for for each application.
Answer: B
Explanation:
= Creating a collection for each application is not a way to accomplish this. A collection is a term used by Ansible to describe a package of related content that can be used to automate the management of Kubernetes resources1. A collection is not a native Kubernetes concept and does not group resources together within the cluster. To group Kubernetes-specific resources, such as secrets, for each application, you need to use namespaces. A namespace is a logical partition of the cluster that allows you to isolate resources and apply policies to them2. You can create a namespace for each application and store the secrets and other resources in that namespace. This way, you can prevent conflicts and limit access to the resources of each application. To create a namespace, you can use the kubectl create namespace command or a yaml file2. To create a secret within a namespace, you can use the kubectl create secret command with the --namespace option or a yaml file with the metadata.namespace field3. References:
* Kubernetes Collection for Ansible - GitHub
* Namespaces | Kubernetes
* Secrets | Kubernetes
* Managing Secrets using kubectl | Kubernetes
NEW QUESTION # 131
Seven managers are in a swarm cluster.
Is this how should they be distributed across three datacenters or availability zones?
Solution: 3-3-1
Answer: B
Explanation:
= Distributing seven managers across three datacenters or availability zones as 3-3-1 is not the best way to ensure high availability and fault tolerance. This is because if one of the datacenters with three managers fails, the remaining four managers will not have a quorum to elect a leader and continue the swarm operations. A quorum is the minimum number of managers that must be available to maintain the swarm state, and it is calculated as (N/2) + 1, where N is the total number of managers1. For seven managers, the quorum is five, so losing three managers will cause the swarm to lose the quorum. A better way to distribute seven managers across three datacenters or availability zones is 2-2-3, which will allow the swarm to survive the failure of any one datacenter2. References:
* Administer and maintain a swarm of Docker Engines
* Distribute manager nodes across multiple AZ
NEW QUESTION # 132
Which of the following commands will ensure that overlay traffic between service tasks is encrypted?
Answer: A
NEW QUESTION # 133
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