CLI Commands aws ec2 describe-instances: Describes one or more of your instances. aws ec2 describe-images: Describes one or more of the images (AMIs, AKIs, and ARIs) available to you. Images available to you include public images, private images that you own, and private images owned by other AWS accounts but for which you have explicit launch permissions. aws ec2 run-instances: Launches the specified number of instances using an AMI for which you have permissions (\ start-instances). aws ec2 terminate-instances:Shuts down one or more instances. This operation is idempotent; if you terminate an instance more than once, each call succeeds.

CLI Commands aws ec2 describe-instances: Describes one or more of your instances. aws ec2 describe-images: Describes one or more of the images (AMIs, AKIs, and ARIs) available to you. Images available to you include public images, private images that you own, and private images owned by other AWS accounts but for which you have explicit launch permissions. aws ec2 run-instances: Launches the specified number of instances using an AMI for which you have permissions (\ start-instances). aws ec2 terminate-instances:Shuts down one or more instances. This operation is idempotent; if you terminate an instance more than once, each call succeeds.

SDK _https://aws.amazon.com/tools/_ Android, iOS, Javascript (Browser) Java .Net Node.js PHP Python Ruby Go C++

SDK Default Regions Default Region: US-EAST-1 Some have default regions (Java) Some do not (Node.js)

EC2 - Pricing Options _On-Demand:_ allow you to pay a fixed rate by the hour with no commitment _Reserved Instances:_ provide you with a capacity reservation, and offer a significant discount on the hourly charge for an instance. 1 Year or 3 Years Terms. _Spot Instances:_ enable you to bid whatever price you want for instance capacity, providing for even greater savings if your applications have flexible start and end times If you terminate the instance, you pay for the hour If AWS terminates the spot instance, you get the hour it was terminated in for free _Dedicated Hosts:_ Physical EC2 server dedicated for your use. Dedicated Hosts can help you reduce costs by allowing you to use your existing server-bound software licenses, such as MSDN subscription licenses

EC2 - Pricing Options _On-Demand:_ allow you to pay a fixed rate by the hour with no commitment _Reserved Instances:_ provide you with a capacity reservation, and offer a significant discount on the hourly charge for an instance. 1 Year or 3 Years Terms. _Spot Instances:_ enable you to bid whatever price you want for instance capacity, providing for even greater savings if your applications have flexible start and end times If you terminate the instance, you pay for the hour If AWS terminates the spot instance, you get the hour it was terminated in for free _Dedicated Hosts:_ Physical EC2 server dedicated for your use. Dedicated Hosts can help you reduce costs by allowing you to use your existing server-bound software licenses, such as MSDN subscription licenses

EC2 - Instance Types DR MC GIFT PX D for Density R for RAM M - main choice for general purpose apps C for Compute G for Graphics I for IOPS F for FPGA T cheap general purpose (think T2 micro) P - Graphics (think Pics) X - Extreme memory

EC2 - Instance Types DR MC GIFT PX D for Density R for RAM M - main choice for general purpose apps C for Compute G for Graphics I for IOPS F for FPGA T cheap general purpose (think T2 micro) P - Graphics (think Pics) X - Extreme memory

EC2 - EBS _General Purpose SSD (GP2)_ General purpose, balances both price and performance Ratio of 3 IOPS per GB with up to 10,000 IOPS and the ability to burst up to 3,000 IOPS for extended periods of time for volumes under 1 GB _Provisionned IOPS SSD (IO1)_ Designed for I/O intensive applications such as large relational or NoSQL databases Use if you need more than 10,000 IOPS Can provision up to 20,000 IOPS per volume

EC2 - EBS General Purpose SSD (GP2) General purpose, balances both price and performance Ratio of 3 IOPS per GB with up to 10,000 IOPS and the ability to burst up to 3,000 IOPS for extended periods of time for volumes under 1 GB Provisionned IOPS SSD (IO1) Designed for I/O intensive applications such as large relational or NoSQL databases Use if you need more than 10,000 IOPS Can provision up to 20,000 IOPS per volume

EC2 - EBS _Throughput Optimized HDD (ST1)_ Big Data Data Warehouse Log processing Cannot be a boot volume _Cold HDD (SC1)_ Lowest cost storage for infrequently accessed workloads File server Cannot be a boot volume _Magnetic (Standard)_ Lowest cost per GB of all EBS volume types that is bootable. Magnetic volumes are ideal for workloads where data is accessed infrequently, and applications where the lowest storage cost is important

EC2 - EBS Throughput Optimized HDD (ST1) Big Data Data Warehouse Log processing Cannot be a boot volume Cold HDD (SC1) Lowest cost storage for infrequently accessed workloads File server Cannot be a boot volume Magnetic (Standard) Lowest cost per GB of all EBS volume types that is bootable. Magnetic volumes are ideal for workloads where data is accessed infrequently, and applications where the lowest storage cost is important

EBS Volumes in Region Amazon EBS volumes are created in a specific AZ and can then be attached to any instances in that same AZ To make a volume available outside of the AZ, you can create a snapshot and restore that snapshot to a new volume anywhere in that region You can copy snapshots to other regions and then restore them to new volumes there

EBS Volumes in Region Amazon EBS volumes are created in a specific AZ and can then be attached to any instances in that same AZ To make a volume available outside of the AZ, you can create a snapshot and restore that snapshot to a new volume anywhere in that region You can copy snapshots to other regions and then restore them to new volumes there

Security Groups Security Groups are virtual firewall All Inbound Traffic is blocked by default All Outbout Traffic is allowed by default Changes to Security Groups take effect immediately You can have any number of EC2 instances within a security group You can have multiple security groups attached to EC2 instances Security Groups are _STATEFUL_ If you create an inbound traffic rule allowing traffic in, that traffic is automatically allowed back out again You cannot block specific IP addresses using Security Groups, instead use Network Access Control Lists You can specify allow rules, but not deny rules

Security Groups Security Groups are virtual firewall All Inbound Traffic is blocked by default All Outbout Traffic is allowed by default Changes to Security Groups take effect immediately You can have any number of EC2 instances within a security group You can have multiple security groups attached to EC2 instances Security Groups are _STATEFUL_ If you create an inbound traffic rule allowing traffic in, that traffic is automatically allowed back out again You cannot block specific IP addresses using Security Groups, instead use Network Access Control Lists You can specify allow rules, but not deny rules

Snapshots Snapshots of encrypted volumes are encrypted automatically Volumes restored from encrypted snapshots are encrypted automatically You can share snapshots, but only if they are unencrypted (the encryption key is tied to your AWS account) These snapshots can be shared with other AWS accounts or made public To create a snapshot for Amazon EBS volumes that serve as root devices, you should stop the instance before taking the snapshot

Snapshots Snapshots of encrypted volumes are encrypted automatically Volumes restored from encrypted snapshots are encrypted automatically You can share snapshots, but only if they are unencrypted (the encryption key is tied to your AWS account) These snapshots can be shared with other AWS accounts or made public To create a snapshot for Amazon EBS volumes that serve as root devices, you should stop the instance before taking the snapshot

EC2 Flashcards by Julien Heck

CLI Commands

aws ec2 describe-instances: Describes one or more of your instances.
aws ec2 describe-images: Describes one or more of the images (AMIs, AKIs, and ARIs) available to you. Images available to you include public images, private images that you own, and private images owned by other AWS accounts but for which you have explicit launch permissions.
aws ec2 run-instances: Launches the specified number of instances using an AMI for which you have permissions (<> start-instances).
aws ec2 terminate-instances:Shuts down one or more instances. This operation is idempotent; if you terminate an instance more than once, each call succeeds.

CLI Commands

aws ec2 describe-instances: Describes one or more of your instances.
aws ec2 describe-images: Describes one or more of the images (AMIs, AKIs, and ARIs) available to you. Images available to you include public images, private images that you own, and private images owned by other AWS accounts but for which you have explicit launch permissions.
aws ec2 run-instances: Launches the specified number of instances using an AMI for which you have permissions (<> start-instances).
aws ec2 terminate-instances:Shuts down one or more instances. This operation is idempotent; if you terminate an instance more than once, each call succeeds.

How well did you know this?

Not at all

Perfectly

SDK

https://aws.amazon.com/tools/

Android, iOS, Javascript (Browser)
Java
.Net
Node.js
PHP
Python
Ruby
Go
C++

SDK

https://aws.amazon.com/tools/

Android, iOS, Javascript (Browser)
Java
.Net
Node.js
PHP
Python
Ruby
Go
C++

How well did you know this?

Not at all

Perfectly

SDK Default Regions

Default Region: US-EAST-1
Some have default regions (Java)
Some do not (Node.js)

SDK Default Regions

Default Region: US-EAST-1
Some have default regions (Java)
Some do not (Node.js)

How well did you know this?

Not at all

Perfectly

EC2 - Pricing Options

On-Demand: allow you to pay a fixed rate by the hour with no commitment
Reserved Instances: provide you with a capacity reservation, and offer a significant discount on the hourly charge for an instance. 1 Year or 3 Years Terms.
Spot Instances: enable you to bid whatever price you want for instance capacity, providing for even greater savings if your applications have flexible start and end times
- If you terminate the instance, you pay for the hour
- If AWS terminates the spot instance, you get the hour it was terminated in for free
Dedicated Hosts: Physical EC2 server dedicated for your use. Dedicated Hosts can help you reduce costs by allowing you to use your existing server-bound software licenses, such as MSDN subscription licenses

EC2 - Pricing Options

On-Demand: allow you to pay a fixed rate by the hour with no commitment
Reserved Instances: provide you with a capacity reservation, and offer a significant discount on the hourly charge for an instance. 1 Year or 3 Years Terms.
Spot Instances: enable you to bid whatever price you want for instance capacity, providing for even greater savings if your applications have flexible start and end times
- If you terminate the instance, you pay for the hour
- If AWS terminates the spot instance, you get the hour it was terminated in for free
Dedicated Hosts: Physical EC2 server dedicated for your use. Dedicated Hosts can help you reduce costs by allowing you to use your existing server-bound software licenses, such as MSDN subscription licenses

How well did you know this?

Not at all

Perfectly

EC2 - Instance Types

DR MC GIFT PX

D for Density
R for RAM
M - main choice for general purpose apps
C for Compute
G for Graphics
I for IOPS
F for FPGA
T cheap general purpose (think T2 micro)
P - Graphics (think Pics)
X - Extreme memory

EC2 - Instance Types

DR MC GIFT PX

D for Density
R for RAM
M - main choice for general purpose apps
C for Compute
G for Graphics
I for IOPS
F for FPGA
T cheap general purpose (think T2 micro)
P - Graphics (think Pics)
X - Extreme memory

How well did you know this?

Not at all

Perfectly

EC2 - Instance Types

EC2 - Instance Types

How well did you know this?

Not at all

Perfectly

EBS Consists of:

General Purpose SSD - GP2 - (Up to 10,000 IOPS)
Provisioned IOPS SSD - IO1 - (More than 10,000 IOPS)
HDD, Throughput Optimized - ST1 - frequently accessed workloads
HDD, Cold - SC1 - less frequently accessed data
HDD, Magnetic - Standard - cheap, infrequently accessed storage

You cannot mount 1 EBS volume to multiple EC2 instances, instead use EFS.

EBS Consists of:

General Purpose SSD - GP2 - (Up to 10,000 IOPS)
Provisioned IOPS SSD - IO1 - (More than 10,000 IOPS)
HDD, Throughput Optimized - ST1 - frequently accessed workloads
HDD, Cold - SC1 - less frequently accessed data
HDD, Magnetic - Standard - cheap, infrequently accessed storage

You cannot mount 1 EBS volume to multiple EC2 instances, instead use EFS.

How well did you know this?

Not at all

Perfectly

EC2 - EBS

General Purpose SSD (GP2)
- General purpose, balances both price and performance
- Ratio of 3 IOPS per GB with up to 10,000 IOPS and the ability to burst up to 3,000 IOPS for extended periods of time for volumes under 1 GB
Provisionned IOPS SSD (IO1)
- Designed for I/O intensive applications such as large relational or NoSQL databases
- Use if you need more than 10,000 IOPS
- Can provision up to 20,000 IOPS per volume

EC2 - EBS

General Purpose SSD (GP2)
- General purpose, balances both price and performance
- Ratio of 3 IOPS per GB with up to 10,000 IOPS and the ability to burst up to 3,000 IOPS for extended periods of time for volumes under 1 GB
Provisionned IOPS SSD (IO1)
- Designed for I/O intensive applications such as large relational or NoSQL databases
- Use if you need more than 10,000 IOPS
- Can provision up to 20,000 IOPS per volume

How well did you know this?

Not at all

Perfectly

EC2 - EBS

Throughput Optimized HDD (ST1)
- Big Data
- Data Warehouse
- Log processing
- Cannot be a boot volume
Cold HDD (SC1)
- Lowest cost storage for infrequently accessed workloads
- File server
- Cannot be a boot volume
Magnetic (Standard)
- Lowest cost per GB of all EBS volume types that is bootable. Magnetic volumes are ideal for workloads where data is accessed infrequently, and applications where the lowest storage cost is important

EC2 - EBS

Throughput Optimized HDD (ST1)
- Big Data
- Data Warehouse
- Log processing
- Cannot be a boot volume
Cold HDD (SC1)
- Lowest cost storage for infrequently accessed workloads
- File server
- Cannot be a boot volume
Magnetic (Standard)
- Lowest cost per GB of all EBS volume types that is bootable. Magnetic volumes are ideal for workloads where data is accessed infrequently, and applications where the lowest storage cost is important

How well did you know this?

Not at all

Perfectly

EC2 - Launch new instance

Termination protection is turned off by default, you must turn it on (flag in Instance Details: Enable termination protection)
On an EBS-backed instance, the default action for the root EBS volume is to be deleted when the instance is terminated (flag in Storage: Delete on Termination)
EBS root volume of your DEFAULT AMI’s cannot be encrypted. You can use a third party tool to encrypt the root volume or this can be done when creating AMI’s in the AWS console or using the API
Additional EBS volume can be encrypted

EC2 - Launch new instance

Termination protection is turned off by default, you must turn it on (flag: Enable termination protection)
On an EBS-backed instance, the default action for the root EBS volume is to be deleted when the instance is terminated
EBS root volume of your DEFAULT AMI’s cannot be encrypted. You can use a third party tool to encrypt the root volume or this can be done when creating AMI’s in the AWS console or using the API
Additional EBS volume can be encrypted

How well did you know this?

Not at all

Perfectly

EBS Volumes in Region

Amazon EBS volumes are created in a specific AZ and can then be attached to any instances in that same AZ

To make a volume available outside of the AZ, you can create a snapshot and restore that snapshot to a new volume anywhere in that region
You can copy snapshots to other regions and then restore them to new volumes there

EBS Volumes in Region

Amazon EBS volumes are created in a specific AZ and can then be attached to any instances in that same AZ

To make a volume available outside of the AZ, you can create a snapshot and restore that snapshot to a new volume anywhere in that region
You can copy snapshots to other regions and then restore them to new volumes there

How well did you know this?

Not at all

Perfectly

Security Groups

Security Groups are virtual firewall
All Inbound Traffic is blocked by default
All Outbout Traffic is allowed by default
Changes to Security Groups take effect immediately
You can have any number of EC2 instances within a security group
You can have multiple security groups attached to EC2 instances
Security Groups are STATEFUL
- If you create an inbound traffic rule allowing traffic in, that traffic is automatically allowed back out again
You cannot block specific IP addresses using Security Groups, instead use Network Access Control Lists
You can specify allow rules, but not deny rules

Security Groups

Security Groups are virtual firewall
All Inbound Traffic is blocked by default
All Outbout Traffic is allowed by default
Changes to Security Groups take effect immediately
You can have any number of EC2 instances within a security group
You can have multiple security groups attached to EC2 instances
Security Groups are STATEFUL
- If you create an inbound traffic rule allowing traffic in, that traffic is automatically allowed back out again
You cannot block specific IP addresses using Security Groups, instead use Network Access Control Lists
You can specify allow rules, but not deny rules

How well did you know this?

Not at all

Perfectly

Volumes and Snapshots

Volumes exist on EBS
- Volumes = Virtual Hard Disk
Snapshots of a Volume exists on S3
Snapshots are point in time copies of Volumes
Snapshots are incremental, this means that only blocks that have changed since your last snapshot are moved to S3

Volumes and Snapshots

Volumes exist on EBS
- Volumes = Virtual Hard Disk
Snapshots of a Volume exists on S3
Snapshots are point in time copies of Volumes
Snapshots are incremental, this means that only blocks that have changed since your last snapshot are moved to S3

How well did you know this?

Not at all

Perfectly

Snapshots

Snapshots of encrypted volumes are encrypted automatically
Volumes restored from encrypted snapshots are encrypted automatically
You can share snapshots, but only if they are unencrypted (the encryption key is tied to your AWS account)
- These snapshots can be shared with other AWS accounts or made public
To create a snapshot for Amazon EBS volumes that serve as root devices, you should stop the instance before taking the snapshot

Snapshots

Snapshots of encrypted volumes are encrypted automatically
Volumes restored from encrypted snapshots are encrypted automatically
You can share snapshots, but only if they are unencrypted (the encryption key is tied to your AWS account)
- These snapshots can be shared with other AWS accounts or made public
To create a snapshot for Amazon EBS volumes that serve as root devices, you should stop the instance before taking the snapshot

How well did you know this?

Not at all

Perfectly

How can I take a Snapshot of a RAID Array?

Problem: Take a snapshot, the snapshot excludes data held in the cache by applications and the OS. This tends not to matter on a single volume, however using mulitple volumes in a RAID array, this can be a problem due to interdependencies of the array.

Solution: Take an application consistent snapshot.

Stop the application from writing to disk
Flush all caches to the disk

How can we do this?

Freeze the file system (OR)
Umount the RAID array (OR)
Shutting down the EC2 instance

How can I take a Snapshot of a RAID Array?

Solution: Take an application consistent snapshot.

Stop the application from writing to disk
Flush all caches to the disk

How can we do this?

Freeze the file system (OR)
Umount the RAID array (OR)
Shutting down the EC2 instance

How well did you know this?

Not at all

Perfectly

AMI

Amazon Machine Image (AMI) provides pre-configured operation systems such as Linux and Windows.

AMI’s are regional. You can only launch an AMI from the region in which it is stored. However, you can copy AMI’s to other regions using the console, command line or the Amazon EC2 API.

You can choose an AMI from:

Basic Amazon Machine Image (AMI) provided by AWS
AWS Marketplace
Community AMIs
Create your own AMI
VM Import/Export

Study These Flashcards

AMI

Amazon Machine Image (AMI) provides pre-configured operation systems such as Linux and Windows.

AMI’s are regional. You can only launch an AMI from the region in which it is stored. However, you can copy AMI’s to other regions using the console, command line or the Amazon EC2 API.

You can choose an AMI from:

Basic Amazon Machine Image (AMI) provided by AWS
AWS Marketplace
Community AMIs
Create your own AMI
VM Import/Export

You can select your AMI based on:

Region (see Regions and Availability Zones)
Operating System
Architecture (32-bit or 64-bit)
Launch Permissions
Storage for the Root Device (Root Device Volume)
- EBS
- Instance Store (EPHEMERAL STORAGE)

Study These Flashcards

Amazon Machine Image (AMI) provides pre-configured operation systems such as
Linux and Windows.

You can select your AMI based on:

Region (see Regions and Availability Zones)
Operating System
Architecture (32-bit or 64-bit)
Launch Permissions
Storage for the Root Device (Root Device Volume)
- EBS
- Instance Store (EPHEMERAL STORAGE)

AMI’s are regional. You can only launch an AMI from the region in which it is stored. However, you can copy AMI’s to other regions using the console, command line or the Amazon EC2 API.

EBS vs Instance Store

All AMIs are categorized as either backed by Amazon EBS or backed by instance store

EBS Volumes: Network attached, persistent storage. The root device for an instance launched from the AMI is an Amazon EBS volume created from an Amazon EBS snapshot

Instance Store Volumes: Locally attached instance storage. The root device for an instance launched from the AMI is an instance store volume created from a template stored in Amazon S3

Study These Flashcards

EBS vs Instance Store

All AMIs are categorized as either backed by Amazon EBS or backed by instance store

For EBS Volumes: The root device for an instance launched from the AMI is an Amazon EBS volume created from an Amazon EBS snapshot

For Instance Store Volumes: The root device for an instance launched from the AMI is an instance store volume created from a template stored in Amazon S3

EBS vs Instance Store

Instance Store Volumes are sometimes called Ephemeral Storage
Instance Store Volumes cannot be stopped. If the underlying host fails, you will loose your data
EBS backed instances can be stopped. You will not loose the data on this instance if it is stopped
You can reboot both, you will not loose your data
By default, both ROOT volumes will be deleted on termination, however with EBS volumes, you can tell AWS to keep the root device volume (uncheck “Delete on Termination” flag)

Study These Flashcards

EBS vs Instance Store

Instance Store Volumes are sometimes called Ephemeral Storage
Instance Store Volumes cannot be stopped. If the underlying host fails, you will loose your data
EBS backed instances can be stopped. You will not loose the data on this instance if it is stopped
You can reboot both, you will not loose your data
By default, both ROOT volumes will be deleted on termination, however with EBS volumes, you can tell AWS to keep the root device volume (uncheck “Delete on Termination” flag)

EBS vs Instance Store

In general, Instance Store volumes are ideal for temporary storage of information that is continually changing, such as buffers, caches, scratch data and other temporary content, or for data that is replicated across a fleet of instances. Unlike EBS volumes, Instance Store cannot be detached or attached to another instance.

Study These Flashcards

EBS vs Instance Store

Elastic Load Balancers

Read the ELB FAQ for Classic Load Balancers (as opposed to Application Load Balancers)
Instances monitored by ELB are reported as
- InService
- OutofService
Health Checks check instance health by talking to it
ELB have their own DNS name. You are never given an IP address
Connection draining: Enabled by default. It happens while deregistering an instance from an Elastic Load Balancer. For the duration of the configured timeout, the load balancer will allow existing, in-flight requests made to an instance to complete, but it will not send any new requests to the instance. Once the timeout is reached, any remaining connections will be forcibly closed.

Study These Flashcards

Elastic Load Balancers

Read the ELB FAQ for Classic Load Balancers (as opposed to Application Load Balancers)
Instances monitored by ELB are reported as
- InService
- OutofService
Health Checks check instance health by talking to it
ELB have their own DNS name. You are never given an IP address
Connection draining: Enabled by default. It happens while deregistering an instance from an Elastic Load Balancer. For the duration of the configured timeout, the load balancer will allow existing, in-flight requests made to an instance to complete, but it will not send any new requests to the instance. Once the timeout is reached, any remaining connections will be forcibly closed.

ELB - Multi-Load Balancer Pattern

The behavior (on the load balancer level) for mobile sites and PC sites can be different, even when using the same Amazon EC2 instance
Even when multiple SSLs (HTTPS) are used by the same Amazon EC2 instance, you can prepare load balancers for each SSL (ELB supports a single SSL certificate)
Session affinity: You bind all the transactions of a session to a specific compute ressource. This is achieved through the “sticky sessions” feature of ELB.

Study These Flashcards

ELB - Multi-Load Balancer Pattern

The behavior (on the load balancer level) for mobile sites and PC sites can be different, even when using the same Amazon EC2 instance
Even when multiple SSLs (HTTPS) are used by the same Amazon EC2 instance, you can prepare load balancers for each SSL (ELB supports a single SSL certificate)
Session affinity: You bind all the transactions of a session to a specific compute ressource. This is achieved through the “sticky sessions” feature of ELB.

CloudWatch

Standard Monitoring = 5 mins
Detailed Monitoring = 1 min
CloudWatch is for performance monitoring (CPU, Network, Disk, Status)
CloudTrail is for auditing

Study These Flashcards

CloudWatch

Standard Monitoring = 5 mins
Detailed Monitoring = 1 min
CloudWatch is for performance monitoring (CPU, Network, Disk, Status)
CloudTrail is for auditing

What can I do with CloudWatch

Dashboards: Creates awesome dashboards to see what is happening with your AWS environment
Alarms: Allows you to set Alarms that notify you when particular threshold are hit
Events: CloudWatch Events helps you to respond to state changes in your AWS ressources
Logs: CloudWatch Logs helps you to aggregate, monitor and store logs

Study These Flashcards

What can I do with CloudWatch

Dashboards: Creates awesome dashboards to see what is happening with your AWS environment
Alarms: Allows you to set Alarms that notify you when particular threshold are hit
Events: CloudWatch Events helps you to respond to state changes in your AWS ressources
Logs: CloudWatch Logs helps you to aggregate, monitor and store logs

**IAM Roles** * Roles are more secure than storing your access key and secret access key on individual EC2 instances * Roles are easier to manage * Roles can be assigned to an EC2 instance after it is created, but currently only using the command line * Roles are universal, you can use them in any Region

**EC2 Instance Meta-data** * Used to get information about an instance (such as public IP) * Not user meta data * Command: **curl** **_http://169.254.169.254/latest/meta-data_** ![]()

**EC2 Instance Meta-data** * Used to get information about an instance (such as public IP) * Not user meta data * Command: **curl** **_http://169.254.169.254/latest/meta-data_**

**EC2 - Placement Group** A placement group is a logical grouping of instances within a single Availibility Zone. Using placement groups enables applications to participate in a low-latency, 10 Gpbs network. Placement groups are recommended for applications that benefit from low network latency, high network throughput, or both (e.g. Grid, Hadoop, Cassandra, etc.).

**EC2 - Placement Group** * A placement group can't span mulitple Availibility Zones * The name you specify for a placement group must be unique within your AWS account * Only certain type of instances can be launched in placement group (Compute Optimized, GPU, Memory Optimized, Storage Optimized) * AWS recommend homogenous instances within placement groups * You can't merge placement groups * You can't move an existing instance into a placement group. You can create an AMI from your existing instance, and then launch a new instance from the AMI into a placement group

**EFS** Amazon Elastic File System (Amazon EFS) is a file storage service for Amazon Elastic Compute Cloud (Amazon EC2) instances. Amazon EFS is easy to use and provides a simple interface that allows you to create and configure file systems quickly and easily. With Amazon EFS, storage capacity is elastic, growing and shrinking automatically as you add and remove files, so your applications have the storage they need, when they need it.

**EFS - Features** * Supports the Network File System version 4 (NFSv4) protocol * You only pay for the storage you use (no pre-provisioning required) * Can scale up to the petabytes * Can support thousands of concurrent NFS connections * Data is stored across multiple AZ's within a region

**What is Lambda?** AWS Lambda is a compute service where you can upload your code and create a Lambda function. AWS Lambda takes care of provisioning and managing the servers that you use to run the code. You don't have to worry about operating systems, patching, scaling etc. You can use Lambda in the following ways: * As en event-driven compute service where AWS Lambda runs your code in response to events. These events could be changes to data in an Amazon S3 bucket or an Amazon DynamoDB table * As a compute service to run your code in response to HTTP requests using Amazon API Gateway or API calls made using AWS SDKs.

EC2 Flashcards

(31 cards)