Podcast
Questions and Answers
What is the primary purpose of the Image Management Service (IMS)?
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?
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?
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?
What type of image contains the operating system and pre-installed software for various services?
Which of the following options best describes a marketplace image?
Which of the following options best describes a marketplace image?
How does the IMS enhance security for users utilizing public images?
How does the IMS enhance security for users utilizing public images?
What does a data disk image contain?
What does a data disk image contain?
What is a significant benefit of using the Image Management Service (IMS)?
What is a significant benefit of using the Image Management Service (IMS)?
What is the primary purpose of creating an image from an ECS?
What is the primary purpose of creating an image from an ECS?
Which service is recommended for periodic ECS backups?
Which service is recommended for periodic ECS backups?
How does Auto Scaling (AS) manage resources during peak demand?
How does Auto Scaling (AS) manage resources during peak demand?
What benefit does Auto Scaling provide concerning cost management?
What benefit does Auto Scaling provide concerning cost management?
Which of the following correctly describes the relationship between Auto Scaling and Elastic Load Balancing (ELB)?
Which of the following correctly describes the relationship between Auto Scaling and Elastic Load Balancing (ELB)?
What happens when an unhealthy instance is detected in an Auto Scaling group?
What happens when an unhealthy instance is detected in an Auto Scaling group?
What feature does an Auto Scaling configuration NOT provide?
What feature does an Auto Scaling configuration NOT provide?
What is the main advantage of using a private image in the public cloud?
What is the main advantage of using a private image in the public cloud?
What is the primary function of Auto Scaling (AS)?
What is the primary function of Auto Scaling (AS)?
Which policy allows AS to respond to specific monitored metrics dynamically?
Which policy allows AS to respond to specific monitored metrics dynamically?
In what scenario would AS most likely scale out ECS instances?
In what scenario would AS most likely scale out ECS instances?
What constitutes an AS group?
What constitutes an AS group?
Which action does AS perform when a configured threshold is reached?
Which action does AS perform when a configured threshold is reached?
What does the AS configuration define?
What does the AS configuration define?
How are scheduled scaling actions determined?
How are scheduled scaling actions determined?
Which of the following describes an example of a periodic policy?
Which of the following describes an example of a periodic policy?
What does an AS policy primarily define?
What does an AS policy primarily define?
What is the purpose of the cooldown period in scaling actions?
What is the purpose of the cooldown period in scaling actions?
Which of the following statements about bandwidth scaling is correct?
Which of the following statements about bandwidth scaling is correct?
What does Cloud Container Engine (CCE) provide for users?
What does Cloud Container Engine (CCE) provide for users?
What is a key benefit of using a Dedicated Host (DeH)?
What is a key benefit of using a Dedicated Host (DeH)?
What is the main function of FunctionGraph?
What is the main function of FunctionGraph?
How does AS ensure system stability in an application?
How does AS ensure system stability in an application?
Which of the following is NOT a specification included in an ECS?
Which of the following is NOT a specification included in an ECS?
What is a benefit of using Marketplace images for deploying environments?
What is a benefit of using Marketplace images for deploying environments?
Which format is NOT mentioned as an acceptable image format for import?
Which format is NOT mentioned as an acceptable image format for import?
Why is it advantageous to use shared images for software environment setup?
Why is it advantageous to use shared images for software environment setup?
What is the primary function of a full-ECS image?
What is the primary function of a full-ECS image?
What is required before importing image files in unsupported formats?
What is required before importing image files in unsupported formats?
Which aspect of using a data disk image is highlighted in the content?
Which aspect of using a data disk image is highlighted in the content?
Which of the following is NOT true about a shared image?
Which of the following is NOT true about a shared image?
What is the primary advantage of using cloud images for Internet startups?
What is the primary advantage of using cloud images for Internet startups?
What is a characteristic of a private image?
What is a characteristic of a private image?
Public images can be used to install required applications after creating an ECS.
Public images can be used to install required applications after creating an ECS.
Name one benefit of using the Image Management Service (IMS).
Name one benefit of using the Image Management Service (IMS).
A private image can be a __________ disk image, data disk image, or full-ECS image.
A private image can be a __________ disk image, data disk image, or full-ECS image.
Which of the following operating systems is NOT mentioned as part of public images?
Which of the following operating systems is NOT mentioned as part of public images?
Match the following image types with their descriptions:
Match the following image types with their descriptions:
Public images usually come with built-in security features.
Public images usually come with built-in security features.
What type of image contains only service data?
What type of image contains only service data?
What is the role of Auto Scaling (AS) in managing ECS instances?
What is the role of Auto Scaling (AS) in managing ECS instances?
Auto Scaling can only be triggered at set scheduled times.
Auto Scaling can only be triggered at set scheduled times.
What are the three types of policies that can be configured in Auto Scaling?
What are the three types of policies that can be configured in Auto Scaling?
During heavy web traffic, Auto Scaling can dynamically scale __________ based on ECS metrics.
During heavy web traffic, Auto Scaling can dynamically scale __________ based on ECS metrics.
Match the following types of scaling actions with their descriptions:
Match the following types of scaling actions with their descriptions:
What happens when Cloud Eye generates an alarm based on a monitored metric?
What happens when Cloud Eye generates an alarm based on a monitored metric?
What is one advantage of using Auto Scaling (AS)?
What is one advantage of using Auto Scaling (AS)?
An AS group consists of a collection of instances and can have different AS policies.
An AS group consists of a collection of instances and can have different AS policies.
Private images in the public cloud can be accessed by any user.
Private images in the public cloud can be accessed by any user.
In what scenario would Auto Scaling most likely be used?
In what scenario would Auto Scaling most likely be used?
What service is recommended for periodic backups of ECS?
What service is recommended for periodic backups of ECS?
Auto Scaling monitors the status of instances in an AS group, and replaces any __________ instances it detects.
Auto Scaling monitors the status of instances in an AS group, and replaces any __________ instances it detects.
Match the type of image with its function:
Match the type of image with its function:
What does Auto Scaling (AS) do during high traffic loads?
What does Auto Scaling (AS) do during high traffic loads?
Creating an image from an ECS is similar to taking a snapshot of a running application.
Creating an image from an ECS is similar to taking a snapshot of a running application.
What is the primary benefit of Auto Scaling for cost management?
What is the primary benefit of Auto Scaling for cost management?
Which type of image is used to migrate service data to the cloud?
Which type of image is used to migrate service data to the cloud?
Marketplace images require additional configuration before deployment.
Marketplace images require additional configuration before deployment.
What tool can be used to convert unsupported image formats before importing?
What tool can be used to convert unsupported image formats before importing?
A _____ image is a private image shared with another user.
A _____ image is a private image shared with another user.
What is a key reason for using shared or Marketplace images for software environments?
What is a key reason for using shared or Marketplace images for software environments?
Match the following image types with their descriptions:
Match the following image types with their descriptions:
Only a specific format, such as VHD, is allowed for importing images.
Only a specific format, such as VHD, is allowed for importing images.
What is the primary benefit of using a data disk image?
What is the primary benefit of using a data disk image?
What does an AS policy define?
What does an AS policy define?
A cooldown period is applied to scheduled or periodic scaling actions.
A cooldown period is applied to scheduled or periodic scaling actions.
What service allows you to run code without provisioning or managing servers?
What service allows you to run code without provisioning or managing servers?
AS triggers scaling actions based on the _____ condition.
AS triggers scaling actions based on the _____ condition.
Match the following services with their primary features:
Match the following services with their primary features:
What is a key benefit of using a Dedicated Host?
What is a key benefit of using a Dedicated Host?
Bandwidth scaling can adjust the bandwidth of yearly EIPs.
Bandwidth scaling can adjust the bandwidth of yearly EIPs.
What does a scaling action do in an AS group?
What does a scaling action do in an AS group?
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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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.
