05: Run container images in Azure Container Instances
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Questions and Answers

What is one of the benefits of Azure Container Instances (ACI)?

  • Fast container startup in seconds (correct)
  • Service discovery across multiple containers
  • Custom container orchestration
  • Automatic scaling of container groups

    • How does ACI enable container access?

  • Accessing containers through a proxy server
  • Using a separate gateway for container internet access
  • Connecting containers to a VPN for external access
  • Exposing container groups directly to the internet with an IP address and FQDN (correct)

    • What type of security does ACI provide for applications?

  • Firewall-level security
  • Hypervisor-level security (correct)
  • Application-level security
  • Network-level security

    • What type of data does the ACI service store?

    <p>Minimum customer data required for container groups</p> Signup and view all the answers

    What type of storage does ACI provide for containers?

    <p>Persistent storage by mounting Azure Files shares directly to a container</p> Signup and view all the answers

    What types of containers can be scheduled using ACI?

    <p>Both Windows and Linux containers</p> Signup and view all the answers

    What is the top-level resource in Azure Container Instances?

    <p>Container group</p> Signup and view all the answers

    What do containers in a container group share?

    <p>Lifecycle, resources, local network, and storage volumes</p> Signup and view all the answers

    For full container orchestration and service discovery, what is recommended in the text?

    <p>Azure Kubernetes Service (AKS)</p> Signup and view all the answers

    What are the two common ways to deploy a multi-container group in Azure?

    <p>Using a Resource Manager template or a YAML file</p> Signup and view all the answers

    When is a Resource Manager template recommended for deploying a multi-container group?

    <p>When additional Azure service resources need to be deployed</p> Signup and view all the answers

    Why is a YAML file recommended for deployment in some cases?

    <p>Due to its more concise nature</p> Signup and view all the answers

    How are resources such as CPUs allocated to a container group in Azure Container Instances?

    <p>By adding the resource requests of the instances in the group</p> Signup and view all the answers

    How do container groups in Azure Container Instances share an IP address and port namespace?

    <p>They share an IP address and a port namespace on that IP address</p> Signup and view all the answers

    What must be done to enable external clients to reach a container within a group?

    <p>Expose the port on the IP address and from the container</p> Signup and view all the answers

    Is port mapping supported for containers within a group in Azure Container Instances?

    <p>No, port mapping isn't supported</p> Signup and view all the answers

    How can external volumes be specified to mount within a container group?

    <p>By specifying external volumes in the container group definition</p> Signup and view all the answers

    Which of the following is a supported volume type for mounting within a container group?

    <p>Azure file share</p> Signup and view all the answers

    What happens when a container's restart policy is set to 'Never' in Azure Container Instances?

    <p>The container's status is set to Terminated when it stops</p> Signup and view all the answers

    How are container instances billed in Azure Container Instances?

    <p>By the second for the compute resources used while the container is running</p> Signup and view all the answers

    What is the purpose of a configurable restart policy for containers in Azure Container Instances?

    <p>To specify the behavior when a container's process has completed</p> Signup and view all the answers

    What is the benefit of using Azure Container Instances for run-once tasks like build, test, and image rendering?

    <p>Ease and speed of deploying containers</p> Signup and view all the answers

    How are container instances billed in Azure Container Instances?

    <p>By the second for the compute resources used while the container is running</p> Signup and view all the answers

    What is the purpose of a restart policy in Azure Container Instances?

    <p>To specify the behavior when a container stops</p> Signup and view all the answers

    What are some tasks suitable for execution in container instances in Azure Container Instances?

    <p>Build, test, and image rendering</p> Signup and view all the answers

    What happens to the state of an Azure Container Instance if the container crashes or stops?

    <p>The state is lost and not persisted by default</p> Signup and view all the answers

    What is required for a Linux container to mount an Azure file share as a volume in Azure Container Instances?

    <p>The container must run as root</p> Signup and view all the answers

    Which operating system is supported for mounting Azure Files shares in Azure Container Instances?

    <p>Linux</p> Signup and view all the answers

    Study Notes

    Benefits and Features of Azure Container Instances (ACI)

    • One of the benefits of Azure Container Instances (ACI) is that it provides a serverless way to run containers without worrying about the underlying infrastructure.

    Access and Security

    • ACI enables container access by providing a single IP address and DNS name label for accessing containers.
    • ACI provides network isolation, resource governance, and identity-based security for applications.

    Storage and Data

    • The ACI service stores metadata about containers, such as configuration, state, and logs.
    • ACI provides ephemeral storage for containers, which is deleted when the container is deleted.

    Container Types and Scheduling

    • ACI supports scheduling of Linux and Windows containers.
    • All containers in a container group share the same lifecycle, resources, and network configuration.

    Resource Allocation and Networking

    • Resources such as CPUs are allocated to a container group based on the resource requirements specified in the container group definition.
    • Containers in a container group share an IP address and port namespace, allowing them to communicate with each other using localhost.

    Deployment and Orchestration

    • For full container orchestration and service discovery, it is recommended to use Kubernetes or Azure Kubernetes Service (AKS) in addition to ACI.
    • Multi-container groups can be deployed using Azure CLI, Azure Portal, or Resource Manager templates.
    • Resource Manager templates are recommended for deploying multi-container groups when complex infrastructure is required.
    • YAML files are recommended for deployment in cases where a simple, human-readable format is preferred.

    Container Management and Billing

    • Containers can be restarted automatically based on a configurable restart policy.
    • If a container's restart policy is set to 'Never', it will not be restarted if it crashes or stops.
    • Container instances are billed based on the amount of CPU and memory allocated to the container group.
    • A configurable restart policy allows containers to be restarted automatically if they crash or stop.
    • Azure Container Instances is suitable for run-once tasks like build, test, and image rendering, as it provides a cost-effective and scalable way to run containers.

    Container Instances and Volumes

    • External volumes can be specified to mount within a container group, allowing containers to persist data beyond their lifecycle.
    • Azure Files shares are a supported volume type for mounting within a container group.
    • For a Linux container to mount an Azure file share as a volume, the container must be configured to use the Azure Files SMB protocol.

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    Description

    Quiz: Test Your Knowledge on Azure Container Instances (ACI) Test your understanding of Azure Container Instances with this quiz! Explore the benefits of ACI, including fast startup, container access, and its suitability for various scenarios. Delve into the world of containerization and see how ACI can streamline your applications, task automation, and build jobs.

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