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Amazon Web Services
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 |