Image Management Service (IMS) Overview
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Questions and Answers

What is the primary purpose of the Image Management Service (IMS)?

  • To manage the entire lifecycle of images (correct)
  • To perform security audits on cloud servers
  • To create public images accessible to all users
  • To restrict access to private images only

    • Which type of image is specifically accessible only to the user who created it?

  • Shared image
  • Private image (correct)
  • Marketplace image
  • Public image

    • What is a characteristic of public images?

  • They can only be created from existing private images
  • They come pre-installed with various public applications (correct)
  • They contain only user-specific applications
  • They do not support system disk creation

    • What type of image contains the operating system and pre-installed software for various services?

    <p>System disk image</p> Signup and view all the answers

    Which of the following options best describes a marketplace image?

    <p>Images that are sold by third-party vendors</p> Signup and view all the answers

    How does the IMS enhance security for users utilizing public images?

    <p>By offering Host Security Service (HSS) to improve account protection</p> Signup and view all the answers

    What does a data disk image contain?

    <p>Only service data, without the operating system</p> Signup and view all the answers

    What is a significant benefit of using the Image Management Service (IMS)?

    <p>It provides a self-service platform for image management and maintenance</p> Signup and view all the answers

    What is the primary purpose of creating an image from an ECS?

    <p>To restore the ECS in case of a breakdown.</p> Signup and view all the answers

    Which service is recommended for periodic ECS backups?

    <p>Cloud Server Backup Service (CSBS)</p> Signup and view all the answers

    How does Auto Scaling (AS) manage resources during peak demand?

    <p>By automatically adding ECS instances and increasing bandwidth.</p> Signup and view all the answers

    What benefit does Auto Scaling provide concerning cost management?

    <p>It minimizes resource usage and reduces operational costs.</p> Signup and view all the answers

    Which of the following correctly describes the relationship between Auto Scaling and Elastic Load Balancing (ELB)?

    <p>ELB automatically distributes traffic to instances in an AS group.</p> Signup and view all the answers

    What happens when an unhealthy instance is detected in an Auto Scaling group?

    <p>The unhealthy instance is replaced with a new one.</p> Signup and view all the answers

    What feature does an Auto Scaling configuration NOT provide?

    <p>Static resource allocation with no flexibility.</p> Signup and view all the answers

    What is the main advantage of using a private image in the public cloud?

    <p>It allows for secure backing up of an ECS.</p> Signup and view all the answers

    What is the primary function of Auto Scaling (AS)?

    <p>To automatically adjust compute resources based on service demands.</p> Signup and view all the answers

    Which policy allows AS to respond to specific monitored metrics dynamically?

    <p>Alarm-based policies</p> Signup and view all the answers

    In what scenario would AS most likely scale out ECS instances?

    <p>When there is a sudden increase in traffic during promotions.</p> Signup and view all the answers

    What constitutes an AS group?

    <p>A collection of instances and AS policies with similar attributes.</p> Signup and view all the answers

    Which action does AS perform when a configured threshold is reached?

    <p>It triggers a scaling action to adjust ECS instances or bandwidth.</p> Signup and view all the answers

    What does the AS configuration define?

    <p>A template for the specifications of instances added to an AS group.</p> Signup and view all the answers

    How are scheduled scaling actions determined?

    <p>By predefining specific times for scaling actions to be taken.</p> Signup and view all the answers

    Which of the following describes an example of a periodic policy?

    <p>Increasing bandwidth during a holiday sale every year.</p> Signup and view all the answers

    What does an AS policy primarily define?

    <p>The condition to trigger a scaling action and the operations involved</p> Signup and view all the answers

    What is the purpose of the cooldown period in scaling actions?

    <p>To prevent repeated triggering of the same alarm policy</p> Signup and view all the answers

    Which of the following statements about bandwidth scaling is correct?

    <p>AS automatically adjusts bandwidth for pay-per-use EIPs and shared bandwidths</p> Signup and view all the answers

    What does Cloud Container Engine (CCE) provide for users?

    <p>An enterprise-class Kubernetes service for deploying and managing containerized applications</p> Signup and view all the answers

    What is a key benefit of using a Dedicated Host (DeH)?

    <p>It enables the use of existing software licenses, saving money</p> Signup and view all the answers

    What is the main function of FunctionGraph?

    <p>To allow users to run their code without managing servers</p> Signup and view all the answers

    How does AS ensure system stability in an application?

    <p>By adding or removing instances based on triggering conditions</p> Signup and view all the answers

    Which of the following is NOT a specification included in an ECS?

    <p>Load balancer settings</p> Signup and view all the answers

    What is a benefit of using Marketplace images for deploying environments?

    <p>They allow quick setup of environments with no additional configuration.</p> Signup and view all the answers

    Which format is NOT mentioned as an acceptable image format for import?

    <p>EXT4</p> Signup and view all the answers

    Why is it advantageous to use shared images for software environment setup?

    <p>They enable quick creation of environments without manual configurations.</p> Signup and view all the answers

    What is the primary function of a full-ECS image?

    <p>To include an operating system and pre-installed software along with service data.</p> Signup and view all the answers

    What is required before importing image files in unsupported formats?

    <p>Convert them to one of the supported formats.</p> Signup and view all the answers

    Which aspect of using a data disk image is highlighted in the content?

    <p>It facilitates service data migration to the cloud.</p> Signup and view all the answers

    Which of the following is NOT true about a shared image?

    <p>It is available only for public deployment.</p> Signup and view all the answers

    What is the primary advantage of using cloud images for Internet startups?

    <p>They simplify the deployment of software environments.</p> Signup and view all the answers

    What is a characteristic of a private image?

    <p>Can only be created by the user who owns it</p> Signup and view all the answers

    Public images can be used to install required applications after creating an ECS.

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

    Name one benefit of using the Image Management Service (IMS).

    <p>Convenience in managing images.</p> Signup and view all the answers

    A private image can be a __________ disk image, data disk image, or full-ECS image.

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

    Which of the following operating systems is NOT mentioned as part of public images?

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

    Match the following image types with their descriptions:

    <p>Public Image = Standard image available to all users Private Image = Image created for exclusive user access System Disk Image = Contains an OS and pre-installed software Data Disk Image = Contains only service data</p> Signup and view all the answers

    Public images usually come with built-in security features.

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

    What type of image contains only service data?

    <p>Data disk image.</p> Signup and view all the answers

    What is the role of Auto Scaling (AS) in managing ECS instances?

    <p>To automatically adjust compute resources based on service demands</p> Signup and view all the answers

    Auto Scaling can only be triggered at set scheduled times.

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

    What are the three types of policies that can be configured in Auto Scaling?

    <p>Alarm-based, scheduled, periodic</p> Signup and view all the answers

    During heavy web traffic, Auto Scaling can dynamically scale __________ based on ECS metrics.

    <p>ECS instances</p> Signup and view all the answers

    Match the following types of scaling actions with their descriptions:

    <p>Alarm-based = Triggered by specific monitored metrics Scheduled = Triggered at predefined times Periodic = Triggered at regular intervals Dynamic = Triggered based on real-time service demands</p> Signup and view all the answers

    What happens when Cloud Eye generates an alarm based on a monitored metric?

    <p>Auto Scaling adjusts the number of ECS instances or EIP bandwidth</p> Signup and view all the answers

    What is one advantage of using Auto Scaling (AS)?

    <p>It automatically adjusts resources based on demand.</p> Signup and view all the answers

    An AS group consists of a collection of instances and can have different AS policies.

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

    Private images in the public cloud can be accessed by any user.

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

    In what scenario would Auto Scaling most likely be used?

    <p>During e-commerce promotions or heavy traffic events</p> Signup and view all the answers

    What service is recommended for periodic backups of ECS?

    <p>Cloud Server Backup Service (CSBS) or Volume Backup Service (VBS)</p> Signup and view all the answers

    Auto Scaling monitors the status of instances in an AS group, and replaces any __________ instances it detects.

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

    Match the type of image with its function:

    <p>Public Image = Available for anyone to use Private Image = Accessible only to the creator Marketplace Image = Sold or licensed by third parties Backup Image = Used to restore a system to a previous state</p> Signup and view all the answers

    What does Auto Scaling (AS) do during high traffic loads?

    <p>Increases ECS instances and bandwidth.</p> Signup and view all the answers

    Creating an image from an ECS is similar to taking a snapshot of a running application.

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

    What is the primary benefit of Auto Scaling for cost management?

    <p>It enables on-demand usage of instances and bandwidth, reducing costs.</p> Signup and view all the answers

    Which type of image is used to migrate service data to the cloud?

    <p>Data disk image</p> Signup and view all the answers

    Marketplace images require additional configuration before deployment.

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

    What tool can be used to convert unsupported image formats before importing?

    <p>qemu-img</p> Signup and view all the answers

    A _____ image is a private image shared with another user.

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

    What is a key reason for using shared or Marketplace images for software environments?

    <p>They speed up the deployment process.</p> Signup and view all the answers

    Match the following image types with their descriptions:

    <p>Full-ECS image = Contains an OS, pre-installed software, and service data Shared image = Private image shared with another user Marketplace image = Third-party image published for public use Data disk image = Used for creating EVS disks for data migration</p> Signup and view all the answers

    Only a specific format, such as VHD, is allowed for importing images.

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

    What is the primary benefit of using a data disk image?

    <p>To create EVS disks for migrating service data to the cloud.</p> Signup and view all the answers

    What does an AS policy define?

    <p>The condition to trigger a scaling action and the operations to be performed</p> Signup and view all the answers

    A cooldown period is applied to scheduled or periodic scaling actions.

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

    What service allows you to run code without provisioning or managing servers?

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

    AS triggers scaling actions based on the _____ condition.

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

    Match the following services with their primary features:

    <p>Cloud Container Engine = Enterprise-class Kubernetes service for running containers Dedicated Host = Physical server fully dedicated to user services Auto Scaling = Adjusting instance count based on conditions FunctionGraph = Run code without managing servers</p> Signup and view all the answers

    What is a key benefit of using a Dedicated Host?

    <p>It provides complete isolation of compute resources and license management.</p> Signup and view all the answers

    Bandwidth scaling can adjust the bandwidth of yearly EIPs.

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

    What does a scaling action do in an AS group?

    <p>Adds or removes instances</p> Signup and view all the answers

    Study Notes

    Image Management Service (IMS)

    • IMS manages the entire lifecycle of images, enabling the creation of ECSs or BMSs from public, private, or shared images
    • Private images can be created from cloud servers or external image files allowing easier migration to the cloud
    • IMS provides public, private, Marketplace, and shared images:
      • Public images are standard images provided by the cloud platform, offering a wide array of OSs and preinstalled applications - These images can be further customized by installing additional software.
      • Private images are user-specific and contain an OS, service data, preinstalled applications, and any custom applications added by the creator
      • Shared images are private images that have been shared with other users
      • Marketplace images are third-party images published in the Marketplace, pre-configured with an OS, an application environment, and pre-installed software, designed for easy deployment of websites and application development environments

    Scenarios for IMS

    • Migrating Servers to the Cloud or in the Cloud: IMS allows importing local images to the cloud platform for quick creation of cloud servers for service migration. Images can be shared or replicated across regions for ECS migration between accounts and regions.
    • Deploying a Specific Software Environment: Shared or Marketplace images enable rapid creation of customized software environments without manual configuration or software installation, ideal for startups.
    • Backing Up Server Environments: Creating an image from an ECS provides a backup mechanism. If the ECS fails, the image can be used to restore it. For regular backups, using cloud services like CSBS or VBS is recommended.

    Auto Scaling (AS)

    • AS automatically adjusts resources based on demand, using pre-configured policies, ensuring system stability and cost optimization
    • AS architecture is comprised of AS groups, AS configurations, AS policies, scaling actions, and cooldown periods.
      • AS group: A collection of instances and AS policies, used to enable/disable AS and perform scaling actions.
      • AS configuration: A template that defines specifications for instances to be added to an AS group (ECS type, vCPUs, memory, image, disk, login mode).
      • AS policy: Triggers scaling actions based on defined conditions and operations. Actions can be triggered by alarms, schedules, or periodically.
      • Scaling action: Adds or removes instances to/from an AS group, ensuring the number of instances aligns with demand.
      • Cooldown period: A time interval after a scaling action, preventing repeated triggering of the same event.
    • Bandwidth scaling is supported for pay-per-use EIPs and shared bandwidths.

    Scenarios for AS

    • Web applications - E-commerce, heavy-traffic portals
      • E-commerce sites can automatically scale out ECS instances during large sales events for smoother operation.
      • AS dynamically scales in and out ECS instances for heavy-traffic portals based on resource usage metrics.

    Other Compute Services

    • Cloud Container Engine (CCE): A scalable and high-performance Kubernetes service for running containers and applications on HUAWEI CLOUD allowing easy deployment, management, and scaling of containerized applications
    • Dedicated Host (DeH): Provides dedicated physical servers for your own services, ensuring performance isolation and supporting the use of existing software licenses.
    • FunctionGraph: A serverless computing service for executing code without provisioning or managing servers, offering high availability and scalability. Users only pay for code execution time, eliminating costs during inactive periods.

    Image Management Service (IMS)

    • Purpose: To manage the entire lifecycle of images
    • Functionality: Create ECSs or BMSs from public, private or shared images, create private images from cloud servers or external image files
    • Image definition: A server or disk template containing an OS, service data, and necessary application software
    • Image Types: Public, Private, Marketplace, Shared
    • Public Image: A standard image available to all users containing an OS and pre-installed public applications, can be used to create ECSs and install software
    • Private Image: An image available only to the creator, containing an OS, service data, pre-installed public applications, and custom applications
      • System disk image: Contains OS and pre-installed software
      • Data disk image: Contains only service data
      • Full-ECS image: Contains OS, pre-installed software, and service data
    • Shared Image: A private image shared with other users
    • Marketplace Image: A third-party image published in the Marketplace, contains an OS, application environment, and pre-installed software

    Scenarios

    • Migrating Servers to the Cloud: Import local images to the cloud platform to create cloud servers for service migration
    • Deploying a Specific Software Environment: Use shared or Marketplace images to quickly build custom software environments
    • Backing Up Server Environments: Create an image from an ECS as a backup, similar to system restoration with Ghost

    Auto Scaling (AS)

    • Purpose: Automatically adjust resources based on demand and pre-configured AS policies
    • Functionality: Adjust ECS instances and bandwidth to ensure system stability, enhance cost management, improve availability, and provide fault tolerance
    • Architecture: Automatically adjusts compute resources based on service demands and AS policies
    • Scaling Control: Specify thresholds and schedule for scaling actions
    • Policy Configuration: Configure alarm-based, scheduled, and periodic policies
      • Alarm-based: Configure alarm metrics such as vCPU, memory, disk, and inbound traffic
      • Scheduled: Schedule actions to be taken at a specific time
      • Periodic: Configure scaling actions to be taken at scheduled intervals

    Scenarios

    • Web Applications: Automatically scales out ECS instances and bandwidth during peak demand events, such as promotions or for heavy-traffic portals

    AS Basic Concepts

    • AS group: Collection of instances and AS policies with similar attributes, used to enable or disable AS policies
    • AS configuration: Template specifying specifications for instances to be added to an AS group, including ECS type, vCPU, memory, image, disk, and login mode
    • AS policy: Triggers scaling actions to adjust the number of instances in an AS group, defining triggering conditions and operations to be performed
    • Scaling action: Adds or removes instances from an AS group, ensures the number of instances matches the expected number
    • Cooldown period: Prevents alarm policies from being repeatedly triggered, specifies how long alarm-triggered scaling actions will be disallowed
    • Bandwidth scaling: AS automatically adjusts bandwidth based on the configured policy

    Cloud Container Engine (CCE)

    • Purpose: Provide a highly scalable, high-performance, enterprise-class Kubernetes service for running containers and applications
    • Functionality: Easily deploy, manage, and scale containerized applications on HUAWEI CLOUD

    Dedicated Host (DeH)

    • Purpose: A physical server dedicated to your own services, ensuring performance by keeping compute resources isolated
    • Benefits: Ensures performance, allows for using existing software licenses

    FunctionGraph

    • Purpose: Run code without provisioning or managing servers, ensuring high availability and scalability
    • Functionality: Upload code and define execution conditions, FunctionGraph handles the rest
    • Benefits: Pay-as-you-go, no charges when code is not running

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    Related Documents

    Compute_Cloud_Services_#3.pdf

    Description

    Discover the features of the Image Management Service (IMS) that facilitates the entire lifecycle of images. Learn about public, private, shared, and Marketplace images, and understand how these can be utilized for cloud deployment and migration. This quiz covers the details necessary for effective image management in cloud environments.

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