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Questions and Answers
Which command initiates the process to launch an EC2 instance using the AWS CLI?
Which command initiates the process to launch an EC2 instance using the AWS CLI?
What does the 'image-id' parameter represent in the EC2 launch command?
What does the 'image-id' parameter represent in the EC2 launch command?
In the command 'aws ec2 run-instances --count 1', what does the 'count' parameter signify?
In the command 'aws ec2 run-instances --count 1', what does the 'count' parameter signify?
Which of the following parameters is NOT required to run an EC2 instance using the AWS CLI?
Which of the following parameters is NOT required to run an EC2 instance using the AWS CLI?
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What role does the 'key-name' parameter play in the EC2 launch command?
What role does the 'key-name' parameter play in the EC2 launch command?
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What does the 'security-groups' parameter define in the AWS CLI command?
What does the 'security-groups' parameter define in the AWS CLI command?
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How can an EC2 instance be launched programmatically besides using the AWS Command Line Interface?
How can an EC2 instance be launched programmatically besides using the AWS Command Line Interface?
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Which component must be present before using the AWS CLI command to launch an EC2 instance?
Which component must be present before using the AWS CLI command to launch an EC2 instance?
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What does AMI stand for?
What does AMI stand for?
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Which of the following steps is NOT involved in creating an AMI from an EC2 instance?
Which of the following steps is NOT involved in creating an AMI from an EC2 instance?
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Which option is available when launching an EC2 instance from an AMI?
Which option is available when launching an EC2 instance from an AMI?
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What is a 'golden instance' in the context of EC2?
What is a 'golden instance' in the context of EC2?
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What happens to the EC2 instance during the AMI creation process?
What happens to the EC2 instance during the AMI creation process?
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What aspect does the selected instance type NOT affect?
What aspect does the selected instance type NOT affect?
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Why might you want to copy an AMI to other Regions?
Why might you want to copy an AMI to other Regions?
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Which of the following is NOT an instance type category?
Which of the following is NOT an instance type category?
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What two components make up a key pair in AWS EC2?
What two components make up a key pair in AWS EC2?
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What is the purpose of the private key in a key pair?
What is the purpose of the private key in a key pair?
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What happens after you select all required configurations for launching an EC2 instance?
What happens after you select all required configurations for launching an EC2 instance?
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How does AWS EC2 use public-key cryptography?
How does AWS EC2 use public-key cryptography?
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Which action is NOT prompted before launching an EC2 instance?
Which action is NOT prompted before launching an EC2 instance?
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What do you need the private key for when connecting to a Linux AMI?
What do you need the private key for when connecting to a Linux AMI?
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When prompted to create a new key pair during the launch process, what does this key pair contain?
When prompted to create a new key pair during the launch process, what does this key pair contain?
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Which of the following is NOT a type of configuration to specify when launching an EC2 instance?
Which of the following is NOT a type of configuration to specify when launching an EC2 instance?
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What does an instance enter when it is first launched from an AMI?
What does an instance enter when it is first launched from an AMI?
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Which state allows you to connect over the internet to your instance?
Which state allows you to connect over the internet to your instance?
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What should be true for the command to successfully create an EC2 instance?
What should be true for the command to successfully create an EC2 instance?
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What happens to the public DNS name and public IP address during a reboot of an instance?
What happens to the public DNS name and public IP address during a reboot of an instance?
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What state is indicated before an instance becomes fully stopped?
What state is indicated before an instance becomes fully stopped?
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Which of the following states correctly indicates that an EC2 instance is starting up?
Which of the following states correctly indicates that an EC2 instance is starting up?
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What happens if the command to create an EC2 instance is successfully executed?
What happens if the command to create an EC2 instance is successfully executed?
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When an instance is terminated, what can you still see in the Amazon EC2 console?
When an instance is terminated, what can you still see in the Amazon EC2 console?
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Which component is NOT required for creating an EC2 instance via the command?
Which component is NOT required for creating an EC2 instance via the command?
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What state must an instance be in to enter the pending state again?
What state must an instance be in to enter the pending state again?
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During which action does an instance change from running to a transitional state?
During which action does an instance change from running to a transitional state?
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Which command state signifies that an EC2 instance has been stopped but can be restarted later?
Which command state signifies that an EC2 instance has been stopped but can be restarted later?
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What allows EC2 instances to operate within a specific geographical area?
What allows EC2 instances to operate within a specific geographical area?
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What is true about instances backed by Amazon EBS when they are stopped?
What is true about instances backed by Amazon EBS when they are stopped?
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When an EC2 instance is rebooted, what state does it enter after the command is issued?
When an EC2 instance is rebooted, what state does it enter after the command is issued?
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What condition could prevent the successful creation of an EC2 instance?
What condition could prevent the successful creation of an EC2 instance?
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Study Notes
Amazon Machine Image (AMI) Creation
- An AMI is created from an EC2 instance or imported virtual machine.
- EC2 instances can be launched from existing AMIs, including AWS-provided Quick Start AMIs.
- Unmodified instance can serve as a base for a customized "golden instance" with specific OS and application settings.
- Creating an AMI involves stopping the instance, capturing a snapshot of the root volume, and registering the snapshot.
- Registered AMIs allow launching new instances within the same AWS Region and can be copied to other Regions.
EC2 Instance Configuration
- Instance type selection is crucial and depends on the specific use case.
- Instance specifications influence:
- Memory (RAM) capacity
- Processing power (CPU)
- Disk space and type
- Network performance
- Instance type categories include:
- General purpose
- Compute optimized
Key Pair Management
- At launch, specify an existing key pair or create a new one for secure access to the instance.
- A key pair consists of:
- A public key stored by AWS
- A private key file kept by the user
- For Windows AMIs, the private key is used to retrieve the administrator password; for Linux AMIs, it's used for SSH connections.
Launching EC2 Instances
- Instance launch involves configuring various options through the Launch Wizard, ending with a review before finalizing.
- AWS CLI allows programmatic EC2 instance creation; simple command structure includes essential parameters like:
-
--image-idfor specifying the AMI ID -
--countfor the number of instances -
--instance-typefor selecting the instance size -
--key-namefor the associated key pair -
--security-groupsfor networking configurations -
--regionfor specifying the AWS Region of the AMI
-
EC2 Instance Lifecycle
- The lifecycle of an EC2 instance involves several states:
- Pending: Initial state when an instance is launched or started.
- Running: Instance is fully booted and operational.
- Rebooting: Rebooting an instance keeps it on the same host, retaining IP and data on instance store volumes.
- Stopping: Intermediate state before an EBS-backed instance is fully stopped.
- Stopped: Instance is powered off, no costs incurred; can be restarted later.
- Terminated: Instance is permanently deleted after visibility in the console.
Important Notes on Instance Management
- Instance actions like starting, stopping, rebooting, and terminating influence state transitions.
- Sufficient permissions and resource availability are necessary for commands to successfully create instances.
- Instances' physical resources correlate with the chosen instance type at initialization.
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Description
This quiz covers essential topics related to Amazon Machine Images (AMIs) and EC2 instance configuration in AWS. Learn about the creation process of AMIs, instance type selection, and key pair management for secure instance access. Test your knowledge on these foundational concepts for working with AWS.
