fix: downgrade k8s-sidecar to 1.30.9

[joelmccoy]

Description

k8s-sidecar had releases for 1.30.10 and 1.30.11 yanked due to instability.

And there are multiple issues that prevent us from upgrade to 2.X.X (2.0.0 - 2.1.4) versions:

• High memory usage issue
  • tested 2.1.4 locally and saw memory usage jump from 60MiB to ~270MiB which is not ideal
• tmp directory mount issue affecting loki chart
  • This will be fixed in feat(helm): Bump sidecar to latest version and /tmp volumeMount grafana/loki#19759
  • We could use pepr to mutate this until that is merged in, but the high memory usage is a reason to not bump to any of the 2.0.0-2.1.4 versions

Updates the renovate config to skip these bad versions.

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Other (security config, docs update, etc)

Steps to Validate

• uds run (we hopefully shouldn't see flakiness in the loki ruler integration tests now)

Checklist before merging

• Test, docs, adr added or updated as needed
• Contributor Guide followed

[Copilot]

Pull request overview

This PR downgrades the k8s-sidecar version from 1.30.10 (in Loki) and 2.1.4 (in Grafana) to 1.30.9 due to stability issues with the newer versions. Versions 1.30.10 and 1.30.11 were yanked by the upstream project, and version 2.X introduced significant memory usage increases and tmp directory mount issues that prevent upgrading beyond 1.30.9.

• Downgrade k8s-sidecar from 1.30.10 to 1.30.9 in Loki components
• Downgrade k8s-sidecar from 2.1.4 to 1.30.9 in Grafana components
• Update repository path for Grafana's unicorn flavor to align with zarf.yaml configuration

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/loki/zarf.yaml	Updates k8s-sidecar image references from 1.30.10 to 1.30.9 across all three flavors (upstream, registry1, unicorn)
src/loki/values/upstream-values.yaml	Updates sidecar image tag from 1.30.10 to 1.30.9
src/loki/values/unicorn-values.yaml	Updates sidecar image tag from 1.30.10 to 1.30.9
src/loki/values/registry1-values.yaml	Updates sidecar image tag from 1.30.10 to 1.30.9
src/grafana/zarf.yaml	Updates k8s-sidecar image references from 2.1.4 to 1.30.9 across all three flavors (upstream, registry1, unicorn)
src/grafana/values/upstream-values.yaml	Updates sidecar image tag from 2.1.4 to 1.30.9
src/grafana/values/unicorn-values.yaml	Updates sidecar image tag from 2.1.4 to 1.30.9 and corrects repository path from rfcurated/kiwigrid/k8s-sidecar to rfcurated/k8s-sidecar
src/grafana/values/registry1-values.yaml	Updates sidecar image tag from 2.1.4 to 1.30.9

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[joelmccoy]

tested with this regex: https://regex101.com/r/Yj7Rp2/1

[joelmccoy]

just remove the the leading !/ and trail / and replace // with / as these are escaped in the renovate config

[joelmccoy]

It appears the registry1 image for 1.30.9 is having this issue:

2025-12-11T19:38:15.550398036Z stderr F {"time": "2025-12-11T19:38:15.550241+00:00", "level": "ERROR", "msg": "MaxRetryError when calling kubernetes: HTTPConnectionPool(host='localhost', port=80): Max retries exceeded with url: /api/v1/namespaces/grafana/configmaps?labelSelector=grafana_datasource&timeoutSeconds=60&watch=True (Caused by NewConnectionError(\"HTTPConnection(host='localhost', port=80): Failed to establish a new connection: [Errno 111] Connection refused\"))\n"}

Which points to this potentially this issue (which doesn't make sense since this should only exist in 1.30.10+). Need to further troubleshoot this.