CloudWatch Flashcards

1
Q

максимальное число dimensions у CloudWatch метрики

A

30

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2
Q

CloudWatch нативные метрики для EC2

A

Average CPU Utilisation, Request Count Per Target, Average Network In / Out

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3
Q

CloudWatch кастомные метрики для EC2

A

Average RAM Utilization, Average DB requests, Disk Space

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4
Q

резолюшены CloudWatch Alarm’а

A

STANDARD RESOLUTION 60 сек и кратно реже, HIGH RESOLUTION 10 или 30 сек

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5
Q

технология для обработки CloudWatch логов near-real-time и real-time

A

CloudWatch Logs Subscription Filter

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5
Q

expiration policies CloudWatch логов

A

NEVER по-умолчанию, 1 день - 10 лет

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6
Q

сколько времени может взять CloudWatch S3 Batch Export

A

до 12-ти часов

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7
Q

как по-умолчанию шлёт EC2 instance свои логи в CloudWatch

A

Никак

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8
Q

для автоматической перекачки логов из CloudWatch в S3 используются технологии

A

Kinesis Data Firehose, CloudWatch Logs Subscription Filter

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9
Q

что нужно EC2 instance, чтобы слать логи в CloudWatch

A

CloudWatch Agent, IAM Role

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10
Q

преимущества CloudWatch Unified Agent

A

больше метрик, более гранулярные метрики, поддержка SSM Parameter Store

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11
Q

фича для поиска текстовых паттернов в логах приложения и создания CloudWatch Alarm’а

A

CloudWatch Metric Filter

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12
Q

CloudWatch Alarm Period может быть по времени

A

от десятков секунд до суток

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13
Q

какие target’ы есть в CloudWatch Alarm

A

EC2 (stop, reboot), ASG (масштабировать группу), SNS (отправить сообщение)

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14
Q

технология для интеграционных тестов в CloudWatch

A

Synthetics Canary

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14
Q

как протестировать CloudWatch Alarm вручную

A

aws cloudwatch set-alarm-state –alarm-name “myalarm” –state-value ALARM –state-reason “testing purposes”

15
Q

в чём разница между SNS сообщением отправленным на базе CloudWatch Alarm и на базе EventBridge

A

CloudWatch Alarm опирается на значение CloudWatch метрики, EventBridge опирается на события/операции с AWS ресурсами

16
Q

виды EventBridge Rules

A

Scheduled/Cron Jobs, Event Pattern