3. Section 5: Application Lifecycle Management (21-28)

They share the same life cycle, which means they're created and destroyed together. They shared the same network space, and have access to the same storage volumes.

 

Type the full command to retrieve and display the contents of the file /log/app.log from within the POD named app in the elastic-stack namespace

 

Which are 3 common patterns, when it comes to designing multi-container PODs?

• Static

• Sidecar

• Adapter

• Ambassador

• Fixed

If we have a task that will be run only one time when the pod is first created or a process that waits for an external service or database to be up before the actual application starts, we should use ________________

• ReplicationControllers

• Deployments

• Multi-container Pods

• InitContainers

• Volumes

_________________ are helpful for setting up the environment, downloading necessary resources, or waiting for certain conditions before starting the main containers.

• ReplicationControllers

• Deployments

• Multi-container Pods

• InitContainers

• Volumes

 When a POD is first created the _______________ is run, and the process in the _______________ must run to a completion before the real container hosting the application starts.

 

• ReplicationControllers

• Deployments

• Multi-container Pods

• InitContainers

• Volumes

If any of the initContainers fail to complete, Kubernetes _______________ the Pod repeatedly until the Init Container succeeds.

• Initiates

• Restarts

• Start

• Stops

• Kills

They are used for initialization tasks before the main container starts running.

• Multi-container Pods

• InitContainers

They help insuring that a POD is re-created automatically when the application within the POD crashes.

• Deployments

• ReplicaSets

• ReplicationController

• Quorum Pod