Auto Scaling Group

Question 1

Auto Scaling Group

Auto Scaling Group

Answer 1

ensures enough instances exist to meet demand

Auto Scaling Group

Question 2

how it works

Auto Scaling Group

Answer 2

Scales in or out instances to match load

Auto Scaling Group

Question 3

how to configure sizing

Auto Scaling Group

Answer 3

define minumum, maximum, and desired number of instances

Auto Scaling Group

Question 4

interaction with LB

Auto Scaling Group

Answer 4

registers new instances with LB

Auto Scaling Group

Question 5

treatment of unhealthy instances

Auto Scaling Group

Answer 5

terminated and replacements created

Auto Scaling Group

Question 6

launch template

Auto Scaling Group

Answer 6

defines instance properties

Auto Scaling Group

Question 7

features that can be defined (6/10)

launch template

Answer 7

• AMI
• Instance type
• EC2 User data
• EBS volumes
• security groups
• SSH key pair
• IAM roles
• VPC
• Subnet
• load balancer

launch template

Question 8

scaling policies

Auto Scaling Group

Answer 8

trigger scaling events based on metrics

Auto Scaling Group

Question 9

where alarms and metrics are

scaling policies

Answer 9

CloudWatch

scaling policies

Question 10

scale-out policy

scaling policies

Answer 10

increases instances when alarm is triggered

scaling policies

Question 11

scale-in policy

scaling policies

Answer 11

decreases instances when alarm is triggered

scaling policies

Question 12

Scaling policy types (4)

scaling policies

Answer 12

• Target tracking
• simple / step
• scheduled
• predictive

scaling policies

Question 13

Target tracking

Scaling policy types

Answer 13

keep a metric around target %

Scaling policy types

Question 14

simple / step

Scaling policy types

Answer 14

scale change when CloudWatch alarm is triggered

Scaling policy types

Question 15

scheduled

Scaling policy types

Answer 15

scale based on known usage patterns

Scaling policy types

Question 16

predictive

Scaling policy types

Answer 16

continous monitoring and scheduling based on trends

Scaling policy types

Question 17

metrics usable for scaling (3)

scaling policies

Answer 17

CPUUtilization
RequestCountPerTarget
Average Network I/O

scaling policies

Question 18

scaling cooldown

scaling policies

Answer 18

no change after scaling action for set period

scaling policies

Question 19

purpose

scaling cooldown

Answer 19

allow metrics to stabilize

scaling cooldown

Question 20

ensures enough instances exist to meet demand

Auto Scaling Group

Answer 20

Auto Scaling Group

Auto Scaling Group

Question 21

Scales in or out instances to match load

Auto Scaling Group

Answer 21

how it works

Auto Scaling Group

Question 22

define minumum, maximum, and desired number of instances

Auto Scaling Group

Answer 22

how to configure

Auto Scaling Group

Question 23

registers new instances with LB

Auto Scaling Group

Answer 23

interaction with LB

Auto Scaling Group

Question 24

terminated and replacements created

Auto Scaling Group

Answer 24

treatment of unhealthy instances

Auto Scaling Group

Question 25

defines instance properties | Auto Scaling Group

Answer 25

launch template | Auto Scaling Group

Question 26

* AMI * Instance type * EC2 User data * EBS volumes * security groups * SSH key pair * IAM roles * VPC * Subnet * load balancer | launch template

Answer 26

features that can be defined (6/10) | launch template

Question 27

trigger scaling events based on metrics | Auto Scaling Group

Answer 27

scaling policies | Auto Scaling Group

Question 28

CloudWatch | scaling policies

Answer 28

where alarms and metrics are | scaling policies

Question 29

increases instances when alarm is triggered | scaling policies

Answer 29

scale-out policy | scaling policies

Question 30

decreases instances when alarm is triggered | scaling policies

Answer 30

scale-in policy | scaling policies

Question 31

* Target tracking * simple / step * scheduled * predictive | scaling policies

Answer 31

Scaling policy types (4) | scaling policies

Question 32

keep a metric around target % | Scaling policy types

Answer 32

Target tracking | Scaling policy types

Question 33

scale change when CloudWatch alarm is triggered | Scaling policy types

Answer 33

simple / step | Scaling policy types

Question 34

scale based on known usage patterns | Scaling policy types

Answer 34

scheduled | Scaling policy types

Question 35

continous monitoring and scheduling based on trends | Scaling policy types

Answer 35

predictive | Scaling policy types

Question 36

CPUUtilization RequestCountPerTarget Average Network I/O | scaling policies

Answer 36

metrics usable for scaling (3) | scaling policies

Question 37

no change after scaling action for set period | scaling policies

Answer 37

scaling cooldown | scaling policies

Question 38

allow metrics to stabilize | scaling cooldown

Answer 38

purpose | scaling cooldown