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chore(aws): intro to cloudwatch

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Michele Cereda
2024-03-11 23:25:25 +03:00
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knowledge base/cloud computing/aws/README.md
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# Amazon Web Services
1. [Constraints](#constraints)
1. [Services](#services)
1. [CloudWatch](#cloudwatch)
1. [Resource constraints](#resource-constraints)
1. [Further readings](#further-readings)
1. [Sources](#sources)
## Constraints
## Services
| 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:".<br/>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 |
| 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][services that publish cloudwatch metrics] offer basic monitoring by publishing a default set of metrics to CloudWatch with no charge.<br/>
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:".<br/>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
- [EC2]
- [Services that publish CloudWatch metrics]
### Sources
- [Constraints for tags][constraints tag]
@@ -22,9 +46,12 @@
-->
<!-- In-article sections -->
[cloudwatch]: #cloudwatch
<!-- Knowledge base -->
<!-- Files -->
[ec2]: ec2.md
<!-- Upstream -->
[constraints tag]: https://docs.aws.amazon.com/directoryservice/latest/devguide/API_Tag.html
<!-- Others -->
[services that publish cloudwatch metrics]: https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/aws-services-cloudwatch-metrics.html
[what is cloudwatch]: https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/WhatIsCloudWatch.html