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AWS devops > Monitoring & Reporting > Flashcards

Monitoring & Reporting Flashcards

1
Q

What is cloud watch?

A

For monitor resources on AWS and Apps running on EC2

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2
Q

What Cloud Watch can monitor?

A

Compute Resources, Storage And Content delivery, Database and Anlaytics and Others

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3
Q

What types of compute resources that Cloud Watch can monitor ?

A

Scaling Groups, ELB and Route53 Health Checks.

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4
Q

What types of Storage and content delivery that Cloud Watch can monitor ?

A

EBS, Storage Gateways and CloudFront

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5
Q

What types of Database and Analytics that Cloud Watch can monitor ?

A

Dynamodb, elastic cache, RDS, Elastic mapReduce job flows, RedShift

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6
Q

What types of others that Cloud Watch can monitor ?

A

Sns topics, sqs queue, OpsWorks, CloudWatch logs, AWS Bills

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7
Q

What types of metrics that cloud watch can monitor in EC2 ?

A 
# Host level
  - CPU
  - Network
  - Disk I/O
  - Status Check
# Custom metrics:
  - Ram utilization
  - How much is left of space from Disk
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8
Q

What is the min granularity that custom metrics can use?

A

1 minute

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9
Q

What is the default interval for monitor Host level EC2?

A

5 minutes but can be 1 minute

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10
Q

What are the types that states check can be applied?

A

EC2 Host and EC2 instance

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11
Q

What is the default time that cloud watch metrics are stored?

A

Indefinitely, but can be customized to expire in 2 weeks, 2 month and etc…

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12
Q

What is the state that EC2 and ELB can recover logs?

A

Both EC2 and ELB Logs can be recovered form terminated state.

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13
Q

What is On premise Cloud Watch?

A

Is when cloud watch is used on local DataCenter/Server with SSM Agent or CloudWatch agent.

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14
Q

What are the types of EBS and uses?

A 
#SSD(GP2)
  - Most used
  - Can Boot System
#Provisioned IOP SSD(io1)
  - Great Volume of I/O
  - Used for > 16,000 IOP 
#HDD(st1)
  - For Cheap disk like Big Data, logs, Data warehouse
  - Cannot use for boot
#Cold HDD(SC1)
  -  Super low cost
  - Infrequent acess
  - Cannot be used for boot
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15
Q

How GP2 credits works?

A

Gain 3 IOPs per GB and if is not > 3000 IOPS can use for 30 minutes burst of the left 3000 IOPS, and restore every minute not used.

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16
Q

What is pre-warming on EBS?

A

Is no longer necessary, but if restore ebs from snapshot is need a pre-warming, so every block of the disk need to be readed.

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17
Q

What are the metrics on EBS that can be used and for what?

A 
# Read/Write IOPS, If > 16,000/5.6 TB switch to io1/provisioned iops SSD
# Volume Queue length, best case in  0,  is queue of operations of I/O, must increase the IOPS
18
Q

What are the volume check status and the problems come for this?

A

OK, Warning, impairede, insufficient data.

Degraded/Severely degraded === Warning
Stalled / Not Available === Impaired

19
Q

How modify the size of EBS?

A

Its can be modified the size and IOPS for io1, but on change size must ssh on instance and extend the Volume.

20
Q

What are the three types of ELB?

A 
# Aplication load balancer - For general use, like http and https.
# Network load balancer - High I/O for TCP
# Classic load balancer - Its like Application, but previous generation
21
Q

What are the types of metrics for ELB?

A 
#Cloud Watch metric - how many 500, latency etc.
#Acess logs - Who acess the resource (IP), what is the path, request and response.
#Request tracing -  Is for aplication load balancer, add Header for trace the origin.
#CloudTrail logs -
22
Q

What is the difference between CloudWatch, CloudTrail and Config?

A 
#CW - Monitor the performance, response time, cpu utilization, ram utilization. SPORT perfomance
#CT - API calls to AWS Resources, ip and who(audiction). SPY 
#C - Record the aws Enviroment resouces and notify on changes and break rules. CAMERAS AND CCTV
23
Q

What are the types of metrics on memory cache?

A

Cpu utilization, Swap usage, Evictions and concurrent connections.

24
Q

What are cautions need to monitor cpu utilization on memory cache?

A

memcache

  • Multithread
  • Handle loads of 90%, if > 90% add more nodes
    #Redis
  • Not multithread
  • 90/Cores to see if needs to scale, 90 / 4 cores -> 22,5% usage to scale
25
Q

What are cautions need to monitor swap usage on memory cache?

A 
#memcache
  - +/- 0 of swap and not exceed 50mb, if > 50mb raise memcache_conections_overhead
#Redis
  - no swap metrics
26
Q

What are cautions need to evictions usage on memory cache?

A

memcache

  • Can scale up the machine(more memory) or scale out more nodes
    #Redis
  • Only scale out
27
Q

What are cautions need to concurrent connections usage on memory cache?

A

If had spike on this, need to see if was spike on traffic or the app is not droping connections

28
Q

What you need to know to make cloudwatch dashboards?

A

Dashboards are global, but if you need get a specific resource data you need change the region that the resource are in.

29
Q

What are the types of billing alarms

A 
# Cost - configure a forecast cost and trigger alarm after threasold percentage of the cost passed
# Use - Configure a forecast cost and trigger alarm after threasold percentage of the cost passed for group or resource.
# Reservation - For reservation usage.
30
Q

What you can do with AWS organizations

A 
#Centralize Policies of allow and deny resources between accounts
#Acess control to AWS resouces
#Automate Aws accounts creation and managent in groups
#Consolidate billing
31
Q

What are the types of Tag managers and the diferences?

A 
#Classic resources groups - Can view data about groups tagged with the same tag, can be global or region
#AWS system manager - Can view insight and do automation on tag groups but is regional.
32
Q

What are the model price for EC2?

A 
#OnDemand - Pay as you go hourly or second
#Reserved - Reserve a capacity of ec2 offer significant discount, term of 1 year or 3 years
#Spot - Bid price for instances, recommended for apps that have start and finish flexible
#Dedicated - EC2 dedicated for your, not sharing. Can have discount for uses that has software licenses (server-bound)
33
Q

What are AWS Config

A

Is for monitor changes and rules on resources on AWS region based, can be trigger periodic or by changes, have custom and pre-created RULES to apply to the resources.

34
Q

What are the permissions needed for AWS config?

A

IAM role with read only permission to resources monitored, write permission for s3 bucket for log and publish to SNS

35
Q

Who can access AWS config?

A

Only Sys admins with full access, and Aws config need only read access for monitored resources.

36
Q

What CloudTrail can do with Aws Config?

A

You can setup cloudTrail to log, changes on AWS config, like disabling record/rule of some resource

37
Q

Tell one example of Config, CloudTrail, CloudWatch.

A 
#Config - See the state of security group 3 weeks before
#CloudTrail - See who change the security group 3 weeks before
#CloudWatch - See the CPU and Memory utilization
38
Q

What are the types of Health Dashboard and usage?

A 
#Service Health Dashboard - Is continental, is health of AWS services.
#Personal Health Dashboard - Is global, are issues that can affect services that you are using on AWS.
39
Q

What are the types of metric granularity and example?

A 
# 1 min is detailed monitoring
  - If asks for 3 minutes monitor interval
# 5 min is standard monitor
  - if asks for 10 minutes monitor interval
40
Q

Your application got a lot of 500 two week before, How can you debug this?

A

Just use Acess logs on the ELB stored on s3 bucket, the deleted instances logs are there.

41
Q

What is IOPS?

A

Input/Output Operations per second

AWS devops (4 decks)

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