Bump Grafana Alloy v1.14.0 → v1.16.0 across all four services (alloy-k8s, alloy-ringtail, alloy-tracing-ringtail; alloy native ansible). Also migrate the indri build path from `Dockerfile` to a native Dagger `container.py` per the build-container-image migration playbook.
## Highlights from upstream
- v1.15: database observability promoted to stable, OTel Collector → v0.147.0
- v1.16: clustering for `loki.source.kubernetes_events`, MySQL exporter 0.19.0
- One pre-existing breaking change in v1.15 (`loki.source.awsfirehose` undocumented metric prefix rename) — not used here.
## Build infra
Alloy v1.16.0's go.mod requires Go 1.26.2. The nix derivation now uses `pkgs.go_1_26` with `GOTOOLCHAIN=local` to avoid auto-downloading a toolchain blob that violated the fixed-output rule.
## Test plan
- [ ] CI: `mise run container-build-and-release alloy --ref alloy-v1.16.0` (dispatched as run 522; nix job to be re-triggered with the v1.16.0 goModules outputHash once the local ringtail build surfaces it)
- [ ] After CI green, bump `images[].newTag` in three kustomizations to the new `-<sha>` and `-<sha>-nix` tags, deploy from this branch via `argocd app set <app> --revision alloy-v1.16.0 && argocd app sync <app>`
- [ ] Manual rebuild of macOS native binary on gilbert (per ansible/roles/alloy README) and `mise run provision-indri -- --tags alloy --check --diff`
- [ ] `mise run services-check` after merge & redeploy
Reviewed-on: #345
## Summary
- Replace upstream `docker.io/library/redis:7-alpine` (Redis 7.4.8) with a nix-built container using Redis 8.2.3 from nixpkgs
- Introduce **attached service pattern**: `parent` field in service-versions.yaml, `<parent>-<component>` naming convention, and `assert pkgs.redis.version == version` in default.nix to prevent silent version drift on `flake.lock` updates
- Document the pattern in [[review-services]] so future attached services slot in cleanly
- Backfill `parent: grafana` on existing `grafana-sidecar` entry
## Version drift protection
1. `flake.lock` update bumps nixpkgs redis → `assert` in `default.nix` breaks `nix-build`
2. Developer updates `version` in `default.nix` → prek's `container-version-check` demands matching `service-versions.yaml` update
3. Both must agree before commit succeeds
## Test plan
- [ ] Build container from branch on ringtail (`mise run container-build-and-release authentik-redis`)
- [ ] Update kustomization `newTag` to branch-built image tag
- [ ] Sync authentik ArgoCD app from branch (`argocd app set authentik --revision localize-redis && argocd app sync authentik`)
- [ ] Verify Authentik login, session persistence, and task queue still work
- [ ] After merge: C0 follow-up to update `newTag` to the main-built image tag
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Reviewed-on: #309
## Summary
- Add `containers/alloy/` with dual Dockerfile + Nix build files for Grafana Alloy v1.14.0
- Both builds fetch source from forge mirror (`forge.ops.eblu.me/mirrors/alloy.git`), build the web UI (Node), then compile the Go binary with `netgo embedalloyui` tags
- Update all three alloy deployments (alloy-k8s, alloy-ringtail, alloy-tracing-ringtail) to use `registry.ops.eblu.me/blumeops/alloy`
- `promtail_journal_enabled` tag omitted — requires systemd headers and none of our configs use `loki.source.journal`
## Build verification
- **Dockerfile:** Tested locally via `docker build`, binary reports `v1.14.0` with correct tags
- **Nix:** Tested on ringtail via `nix-build`, all three hashes (fetchgit, npmDeps, goModules) resolved and build succeeds
## Post-merge steps
1. Wait for CI to build the container from main (both Dockerfile and Nix workflows)
2. `mise run container-list alloy` to find the `[main]` tagged image
3. C0 follow-up to update `newTag` in all three kustomizations from `v1.14.0-placeholder` to the real tag
4. Sync ArgoCD apps and verify pods come up healthy
Reviewed-on: #300
