feat: add time-window support for Prometheus telemetry collection

[Sypher845]

Type of change

• Refactor
• New feature
• Bug fix
• Optimization

Description

This PR adds time-window support for Prometheus telemetry collection, enabling significantly faster metrics gathering by passing test timestamps and Prometheus API credentials to krkn-lib.

Changes Made

Code Changes

• run_kraken.py: Updated telemetry function calls to pass start_time, end_time, prometheus_url, and prometheus_bearer_token parameters to get_ocp_prometheus_data() and get_prometheus_pod_data()

Configuration Changes

Added three new configuration options to all config files:

• prometheus_backup_use_api: True - Enable Prometheus HTTP API-based collection (default: True)
• prometheus_time_window_minutes_before: 10 - Minutes before test start to collect metrics (default: 10)
• prometheus_time_window_minutes_after: 10 - Minutes after test end to collect metrics (default: 10)

Files updated:

• config/config.yaml
• config/config_performance.yaml
• CI/config/common_test_config.yaml

How It Works

When used with the updated krkn-lib:

1. Attempts Prometheus HTTP API collection first (only collects metrics for test time window + buffers)
2. Automatically falls back to traditional filesystem backup if API is unavailable
3. Results in 70-85% faster Prometheus collection time

Related Tickets & Documents

• Closes #: Try to reduce telemetry collection step #881

Dependencies:

• Requires corresponding krkn-lib PR with time-window telemetry support (feat: add Prometheus telemetry collection with API-based time-window… krkn-lib#231)

Checklist before requesting a review

• I have performed a self-review of my code by running krkn and specific scenario
• If it is a core feature, I have added thorough unit tests with above 80% coverage

REQUIRED:
Description of combination of tests performed and output of run
I am working on the tests

[Copilot]

Pull request overview

This PR adds time-window support for Prometheus telemetry collection, allowing krkn to collect metrics only for the relevant time window (test duration plus configurable buffers) instead of the entire Prometheus database. This optimization significantly reduces collection time by 70-85%.

Changes:

• Updated telemetry function calls in run_kraken.py to pass test timestamps and Prometheus API credentials to krkn-lib functions
• Added three new configuration parameters to enable API-based collection and configure time windows
• Applied configuration changes consistently across all config files

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
run_kraken.py	Added start_time, end_time, prometheus_url, and prometheus_bearer_token parameters to telemetry collection function calls
config/config.yaml	Added three new telemetry configuration options for API-based collection and time windows
config/config_performance.yaml	Added the same three new telemetry configuration options
CI/config/common_test_config.yaml	Added the same three new telemetry configuration options

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Sypher845]

Hi, @paigerube14 @chaitanyaenr the license compliance test is failing, I can't get through it can you pls check it.
Also, I have opened the needed PR in krkn-lib PR#231

[paigerube14]

Hi, @paigerube14 @chaitanyaenr the license compliance test is failing, I can't get through it can you pls check it. Also, I have opened the needed PR in krkn-lib PR#231

don't need to worry about the license check, can merge without that passing

[Sypher845]

@paigerube14 Hi! This PR is now ready for review. All CI checks are passing, and I’ve addressed the requirements for [Issue #881]. Could you please take a look
Also, I have opened the needed PR in krkn-lib krkn-chaos/krkn-lib#231 please take a look on this too

[Sypher845]

@paigerube14 any update ?
I have rebased it, please review.

[github-actions]

Hi @Sypher845! 👋 This PR has merge conflicts with main and needs to be rebased before it can be merged.

To rebase your branch:

git fetch upstream
git rebase upstream/main
# resolve any conflicts, then:
git add .
git rebase --continue
git push --force-with-lease

Tip: --force-with-lease is safer than --force — it will fail if someone else has pushed to your branch since your last fetch.

For more details, see the Rebase with upstream guide.

The needs-rebase label and this comment will be removed automatically once conflicts are resolved.

[github-actions]

Hi @Sypher845! 👋 One or more commits in this PR are missing a Signed-off-by line, which is required by our DCO policy.

Unsigned commits:

• b9df3c0: Merge branch 'main' into optimize-telemetry-collection-time
• e02658f: Merge branch 'main' into optimize-telemetry-collection-time

To fix, rebase and sign off all commits:

git rebase HEAD~2 --signoff
git push --force-with-lease

Or, to sign off every commit in this PR at once:

git rebase origin/main --signoff
git push --force-with-lease

Tip: Add -s to future git commit commands (e.g. git commit -s -m "...") to sign off automatically.

Note: Please make sure your PR contains only 1 commit before signing off. If you have multiple commits, squash them first:

git rebase -i origin/main   # mark all but the first as 'squash'
git commit --amend -s                 # add Signed-off-by to the squashed commit
git push --force-with-lease

The needs-dco label and this comment will be removed automatically once all commits are signed off.