Monitoring Flashcards

1
Q

What is CloudWatch?

A

Platform for monitoring and observability to identify potential issues

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2
Q

What are the 2 categories of CloudWatch metrics?

A

Default metrics and customer provided metrics

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3
Q

What is the default period for cloudwatch statisitics?

A

60 seconds

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4
Q

Are there default Alarms?

A

No

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5
Q

What is the default reporting interval? For detailed monitoring?

A

5 minute and 1 minute with added cost

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6
Q

What metrics are provided by standard?

A

CPU Utilization, Network throughput

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7
Q

What metrics are custom?

A

EBS volume storage usage, Memory utilization

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8
Q

What does it mean for a metric to be custom?

A

Metrics need a CloudWatch agent installed on the host

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9
Q

What are system metrics?

A

These are default, standard metrics e.g. managed services provides more of these

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10
Q

What are application metrics?

A

Custom metrics that need a CloudWatch agent installed

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11
Q

What is CloudWatch Logs?

A

Place to centrally store and access log files and query

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12
Q

What is a Log Event?

A

A data point of what happened with a timestamp and data

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13
Q

What is a Log Stream?

A

A collection of log events from the same source

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14
Q

What is a Log Group?

A

Collection of log streams from different sources e.g. different ec2 instances

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15
Q

What do you use if you want to use SQL with CloudWatch Logs?

A

Use CloudWatch Insights

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16
Q

What do you create when looking for specific terms in CloudWatch?

A

You create an Event Filter Pattern

17
Q

Where should Logs go if the focus is on storage? If focus is on processing logs?

A

For storage send them to S3

For processing logs send to CloudWatch Logs

18
Q

What are common sources for CloudWatch Logs?

A

EC2, Lamba, RDS, On-Prem, Cloud Trail

19
Q

What should you use if you need realtime log processing?

A

Use Kinesis instead

20
Q

How do you use Alarms with CloudWatch Logs?

A

If an event filter pattern is matched, then generate an Alarm

21
Q

What should you use for system/application lvl monitoring? Monitoring best practices/standards?

A

CloudWatch

AWS Config

22
Q

What do you need installed on EC2 for CloudWatch Logs to work?

A

A CloudWatch Agent needs to be installed

23
Q

Is CloudWatch realtime?

A

No, it is near realtime

24
Q

What can you do to fix underlying hardware failure in EC2 using CloudWatch?

A

You can stop, restart, reboot, terminate an EC2 instance as an Action using CloudWatch Alarm

25
Q

What should you watch out for between Alarms polling period and metric collection?

A

Note that if you are collecting metrics at a 5 minute interval but alarm looks at data every 1 minute then will always be insufficient data