https://github.com/heubeck/examiner

𝕰𝖝𝖆𝖒𝖎𝖓𝖊𝖗 - Just another K8s test-app
https://github.com/heubeck/examiner

kotlin kubernetes native-image quarkus

Last synced: about 1 month ago
JSON representation

𝕰𝖝𝖆𝖒𝖎𝖓𝖊𝖗 - Just another K8s test-app

• Host: GitHub
• URL: https://github.com/heubeck/examiner
• Owner: heubeck
• License: apache-2.0
• Created: 2022-04-15T19:59:30.000Z (over 2 years ago)
• Default Branch: main
• Last Pushed: 2024-05-22T09:51:07.000Z (6 months ago)
• Last Synced: 2024-05-22T10:41:53.876Z (6 months ago)
• Topics: kotlin, kubernetes, native-image, quarkus
• Language: Kotlin
• Homepage:
• Size: 201 KB
• Stars: 3
• Watchers: 1
• Forks: 0
• Open Issues: 4
• Metadata Files:
  • Readme: README.md
  • License: LICENSE
  • Codeowners: .github/CODEOWNERS

Awesome Lists containing this project

README

        
# 𝕰𝖝𝖆𝖒𝖎𝖓𝖊𝖗

![Build&Test](https://github.com/heubeck/examiner/actions/workflows/ci.yaml/badge.svg)

Project to experiment with http request scenarios like service-meshs or deployment-strategies.

Container images for linux/amd64 and linux/arm64 are available from [quay.io/heubeck/examiner](https://quay.io/repository/heubeck/examiner?tab=tags).

## Respond

The 𝕰𝖝𝖆𝖒𝖎𝖓𝖊𝖗 responds to every GET request at or below the `/examine` path with an optional, preconfigured value, set via the `ECHO_VALUE` environment variable.

## Log

The 𝕰𝖝𝖆𝖒𝖎𝖓𝖊𝖗 logs every POST request on arbitrary paths to its log output by default.

The logging can be customized using the following env:

* `LOG_METHODS`: Comma separated list of http methods to be logged

* `LOG_HEADERS`: Comma separated list of regex values for http header names to be logged, defaulting to `X-.*`

## Config

There are some environment variables to configure default behavior:

* `ECHO_VALUE`: Text value to be responded on GET `/examine` requests

* `SERVER_ERROR_RATE`: Int value as probability in percent (0 - 100) that HTTP 500 codes are responded.

* `REQUEST_DELAY`: Default millisecond delay for every request.

* `HTTP_PORT`: Port to serve on, default: 8080

## Parameter

The following query parameter are supported and have precedence over the default configuration:

* `status`: Status value used for the response, range: [200-600[

* `delay`: Milliseconds to delay the response:

  * a single number e.g. "1337" for the given delay of milliseconds

  * a range e.g. "42..667" for a random delay of milliseconds

* `load`: Stress the CPU at a level from 1 (some load) to 100 (high load) for the given `delay`

* `allocation`: Create memory pressure at a level from 1 (slow rate) to 100 (get what's there) by running string allocations over the given `delay`.

## K8s probes

Liveness and readiness probes are always successful at `/.well-known/live` and `/.well-known/ready`.

## Silence! I kill you!

The 𝕰𝖝𝖆𝖒𝖎𝖓𝖊𝖗 dies when called with a DELETE request on the path `/poison-pill`.

The exit code can be configured by a query parameter `exit`: `DELETE /poison-pill?exit=1`, default is exit code `0` (in words: zero).

Only regular supported query parameter for this method is the `delay` to wait before dying.