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oam/knowledge base/cloud computing/aws

Amazon Web Services

  1. Services
    1. CloudWatch
  2. Resource constraints
  3. Further readings
    1. Sources

Services

Service Description
CloudWatch Observability (logging, monitoring, alerting)
EC2 Virtual machines

CloudWatch

Observability service. with functions for logging, monitoring and alerting.

Metrics are whatever needs to be monitored (e.g. CPU usage). Data points are the values of a metric over time. Namespaces are containers for metrics.

Metrics only exist in the region in which they are created.

Many AWS services offer basic monitoring by publishing a default set of metrics to CloudWatch with no charge.
This feature is automatically enabled by default when one starts using one of these services.

Resource constraints

data type component summary description type length pattern required
tag key Required name of the tag The string value can be Unicode characters and cannot be prefixed with "aws:".
The string can contain only the set of Unicode letters, digits, white-space, _,' ., /, =, +, -, :, @ (Java regex: ^([\\p{L}\\p{Z}\\p{N}_.:/=+\\-]*)$)
String 1 to 128 ^([\p{L}\p{Z}\p{N}_.:/=+\-@]*)$ Yes
tag value The optional value of the tag The string value can be Unicode characters. The string can contain only the set of Unicode letters, digits, white-space, _, ., /, =, +, -, :, @ (Java regex: ^([\\p{L}\\p{Z}\\p{N}_.:/=+\\-]*)$") String 0 to 256 ^([\p{L}\p{Z}\p{N}_.:/=+\-@]*)$ Yes

Further readings

Sources