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JEP-0013 Phase 3 - loki push - #1063
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mangelajo merged 12 commits intoOct 14, 2026
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Check name Status Explanation Title check ✅ Passed The title identifies the JEP-0013 Phase 3 Loki push work, which is the main change in the pull request. Description check ✅ Passed The description explains the Loki HTTP push, configuration, buffering, overflow handling, dependencies, and scope. It is directly related to the changeset. Linked Issues check ✅ Passed Check skipped because no linked issues were found for this pull request. Out of Scope Changes check ✅ Passed Check skipped because no linked issues were found for this pull request.
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Inline comments:
In `@controller/cmd/telemetry/main.go`:
- Around line 149-150: Update the logging branch around lokiURL so logger.Info
does not emit the raw URL; parse and redact sensitive components before logging,
or log only the URL scheme and host while preserving the existing queueDepth
context.
In `@controller/image_layout_test.go`:
- Line 60: Wrap the error message in the test around t.Error so each string
segment stays within the 120-character limit while preserving the complete
diagnostic text.
In `@controller/internal/service/loki_push.go`:
- Line 252: Update the failed-push recovery around p.entries so prepending the
failed batch cannot exceed the queue’s configured capacity; retain only the
allowed entries, convert any excess to the existing drop-marker state, and
increment the drop counter consistently with normal overflow handling.
- Line 292: Update normalizeLokiPushURL and the pusher creation flow to reject
non-HTTPS URLs whenever Loki token or Basic credentials are configured, before
creating the pusher; do not attach credentials to HTTP requests. Preserve
unauthenticated HTTP support if already required, while keeping Authorization
handling for HTTPS unchanged.
- Line 296: Update the HTTP client used by the Loki write flow around
p.client.Do(req) to configure CheckRedirect so redirects are permitted only to
approved HTTPS destinations, preventing credentialed POST requests from being
resent over insecure or unapproved locations.
In `@controller/internal/service/metrics_merge.go`:
- Line 91: Update mergeSnapshots to use an OpenMetrics-aware decoder that
correctly parses exemplar markers before merging snapshots, rather than
expfmt.NewDecoder with TypeOpenMetrics. Preserve successful merging of exporter
snapshots containing exemplars, and update the related regression test to expect
the merged metrics instead of a skipped snapshot.
In `@controller/internal/service/metrics_stream.go`:
- Line 235: Update exporterSnapshot creation in the metrics stream to retain
c.id.namespace alongside c.id.name, and propagate that namespace through
snapshot merging and metric labels so same-name exporters from different
namespaces remain distinct. Add a test covering same-name exporters across two
namespaces.
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⛔ Files ignored due to path filters (2)
controller/internal/protocol/jumpstarter/v1/telemetry.pb.gois excluded by!**/*.pb.gocontroller/internal/protocol/jumpstarter/v1/telemetry_grpc.pb.gois excluded by!**/*.pb.go
📒 Files selected for processing (26)
controller/Containerfilecontroller/Makefilecontroller/cmd/telemetry/main.gocontroller/deploy/operator/api/v1alpha1/jumpstarter_types.gocontroller/deploy/operator/api/v1alpha1/zz_generated.deepcopy.gocontroller/deploy/operator/config/crd/bases/operator.jumpstarter.dev_jumpstarters.yamlcontroller/deploy/operator/internal/controller/jumpstarter/jumpstarter_controller.gocontroller/deploy/operator/internal/controller/jumpstarter/telemetry.gocontroller/deploy/operator/internal/controller/jumpstarter/telemetry_loki_test.gocontroller/deploy/operator/internal/controller/jumpstarter/telemetry_phase3_test.gocontroller/deploy/operator/internal/controller/jumpstarter/telemetry_test.gocontroller/image_layout_test.gocontroller/internal/service/loki_push.gocontroller/internal/service/loki_push_test.gocontroller/internal/service/metrics_merge.gocontroller/internal/service/metrics_merge_test.gocontroller/internal/service/metrics_stream.gocontroller/internal/service/metrics_stream_test.gocontroller/internal/service/telemetry_http.gocontroller/internal/service/telemetry_identity.gocontroller/internal/service/telemetry_service.goprotocol/proto/jumpstarter/v1/telemetry.protopython/packages/jumpstarter-protocol/jumpstarter_protocol/jumpstarter/v1/telemetry_pb2.pypython/packages/jumpstarter-protocol/jumpstarter_protocol/jumpstarter/v1/telemetry_pb2.pyipython/packages/jumpstarter-protocol/jumpstarter_protocol/jumpstarter/v1/telemetry_pb2_grpc.pypython/packages/jumpstarter-protocol/jumpstarter_protocol/jumpstarter/v1/telemetry_pb2_grpc.pyi
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## Summary
JEP-0013 Phase 3 PR A**: the `MetricsStream` contract and the telemetry
reverse-scrape hub. This is the merge-base for the rest of the Phase 3
series.
Related PRs will be linked here as they are opened (B, C, D, E). This PR
stays draft until those links are filled in.
- Add `MetricsStream` to `telemetry.proto` (register + scrape
request/response) and regenerate Go + Python stubs.
- Telemetry fans out scrapes over connected streams, merges OpenMetrics,
remaps unknown `driver_type` to `other`, and serves `GET /metrics` on a
dedicated HTTP port (not gRPC `:9093`).
- `/healthz` and `/readyz` as in DD-7.
`jumpstarter_scrape_timeouts_total` on scrape timeout.
- **Lab follow-up in the same PR:** stop silently dropping unparseable
exporter snapshots. Log `exporter metrics snapshot omitted` and
increment `jumpstarter_metrics_parse_errors_total{exporter}` on the same
`/metrics` response. Python `prometheus_client` OpenMetrics exemplars
(`# {lease_id=...}`) still fail `parseMetricFamilies`; the snapshot is
omitted so one exporter cannot 500 the hub. Fixing OpenMetrics/exemplar
parse is a later pass — not this PR.
No exporter client, no operator/image/CRD, no Loki in this PR.
## DEMO
An asciinema demo for this combined Phase 3 work is available in the[
jep-0013-phase3-demo
branch](https://github.com/RoddieKieley/jumpstarter/tree/jep-0013-phase3-demo)
in my repository. Best to [read the description in the DEMO.md
there](https://github.com/RoddieKieley/jumpstarter/blob/jep-0013-phase3-demo/DEMO.md)
and then watch (manually for now) the asciinema file contained at the
end -
[jep-0013-phase3-demo.cast](https://github.com/RoddieKieley/jumpstarter/blob/jep-0013-phase3-demo/jep-0013-phase3-demo.cast)
### IMPORTANT NOTES
* See [MetricsStream during the
lease](https://github.com/RoddieKieley/jumpstarter/blob/jep-0013-phase3-demo/DEMO.md#metricsstream-during-the-lease)
for an important caveat about the implementation about a potential
limitation pointed out in the original JEP-0013 DD-3 regarding potential
limitations for exemplar support.
* Register identity must be exporter_name after jumpstarter-dev#1058 (not Metadata.name
/ "unknown"). That is in PR C.
## How this PR fits the series
```mermaid
flowchart TB
A["PR A this PR: proto + hub"]
B["PR B: image + metrics port + scrape CR"]
C["PR C: exporter MetricsStream client"]
D["PR D: Loki HTTP push"]
E["PR E: jmp PushLogs"]
A --> B
A --> C
B --> D
D --> E
```
| PR | Branch | Status |
|----|--------|--------|
| **A** | `jep-0013-phase3-metricsstream` | **This PR** |
| B | `jep-0013-phase3-operator-image` | jumpstarter-dev#1061 |
| C | `jep-0013-phase3-exporter-metricsstream` | jumpstarter-dev#1062 |
| D | `jep-0013-phase3-loki-push` | jumpstarter-dev#1063 |
| E | `jep-0013-phase3-client-pushlogs` | jumpstarter-dev#1064 |
Reverse-scrape is useful only after **A+B+C**. This PR is still
reviewable alone with mock streams.
## Data flow (this PR)
```mermaid
sequenceDiagram
participant Prom as Prometheus
participant Tel as jumpstarter-telemetry
participant Exp as Exporter stream (PR C)
Prom->>Tel: GET /metrics
Tel->>Exp: MetricsScrapeRequest
Exp-->>Tel: OpenMetrics snapshot
alt parse OK
Tel-->>Prom: merged families + scrape_timeouts
else OpenMetrics exemplar parse fail
Tel-->>Prom: snapshot omitted + parse_errors_total
end
```
## Out of scope / later passes
- Exporter client (C), operator image/metrics port (B), Loki (D), `jmp`
logs (E)
- OpenMetrics exemplar parse (hub still omits those snapshots; now
visible)
- `ServiceMonitor` (Phase 5), driver telemetry API (Phase 4),
multi-replica sticky streams (DD-8)
- Out-of-cluster telemetry Route
## NOTES
### Known merge work (not new features)
* jumpstarter-dev#1062 conflicts with main on exporter.py because of
[jumpstarter-dev#1059](jumpstarter-dev#1059). When
C rebases, keep identity=exporter_name, _session_labels(), and jumpstarter-dev#1059’s
exporter_name= on Session(...).
* [jumpstarter-dev#1027](jumpstarter-dev#1027)
still overlaps operator telemetry files with B/D.
The series is still based on jumpstarter-dev#1058. After A lands, rebase the rest onto
current main (jumpstarter-dev#1059) as a set.
### Explicitly later (already called out as out of scope)
* OpenMetrics exemplar parse (A omits those snapshots; JEP DD-3)
* ServiceMonitor (Phase 5), driver telemetry API (Phase 4)
* Out-of-cluster telemetry Route (demo-only)
* Changing PushLogs logger.Error(nil, …) for exporter TFTP errors
* Cosmetic only: jumpstarter-dev#1060 still has the[ jep-0013-phase3-demo.
---------
Signed-off-by: Roddie Kieley <rkieley@redhat.com>
Signed-off-by: Miguel Angel Ajo Pelayo <miguelangel@ajo.es>
Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: Miguel Angel Ajo Pelayo <miguelangel@ajo.es>
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Inline comments:
Review comments at @controller/internal/service/telemetry_service.go:
- Around line 336-347: Update the Loki startup path in Start so it waits for
LokiPusher.Run to finish its final flush before returning. Track the goroutine’s
completion and ensure cancellation is followed by waiting for that completion;
keep the existing behavior when no pusher is configured.
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📒 Files selected for processing (13)
controller/Containerfilecontroller/Makefilecontroller/cmd/telemetry/main.gocontroller/cmd/telemetry/main_test.gocontroller/deploy/operator/config/crd/bases/operator.jumpstarter.dev_jumpstarters.yamlcontroller/deploy/operator/internal/controller/jumpstarter/jumpstarter_controller.gocontroller/deploy/operator/internal/controller/jumpstarter/telemetry.gocontroller/deploy/operator/internal/controller/jumpstarter/telemetry_test.gocontroller/image_layout_test.gocontroller/internal/service/loki_push.gocontroller/internal/service/loki_push_test.gocontroller/internal/service/telemetry_http.gocontroller/internal/service/telemetry_service.go
🚧 Files skipped from review as they are similar to previous changes (1)
- controller/deploy/operator/internal/controller/jumpstarter/jumpstarter_controller.go
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Inline comments:
Review comments at @controller/internal/service/telemetry_service_test.go:
- Line 552: Update the cleanup registered for the test server so it calls
releaseFlush before srv.Close, ensuring a blocked handler can finish before the
server waits for outstanding requests.
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controller/internal/service/loki_push.gocontroller/internal/service/telemetry_service.gocontroller/internal/service/telemetry_service_test.go
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## Summary JEP-0013 Phase 3 PR B**: make the MetricsStream hub from PR A runnable in-cluster. Depends on **PR A**: jumpstarter-dev#1060 Do not merge until A is on `main`, then rebase this branch onto `main`. Related PRs C–E will be linked here as they are opened. - Build and copy `/telemetry` in `controller/Containerfile` and `make build` / `docker-build-ci` (operator already `Command: ["/telemetry"]`; `main` still only ships `manager` + `router`). - Expose telemetry HTTP metrics on Service/container port **8080**; `/healthz` and `/readyz` probes on that port (replacing TCP probes on gRPC `:9093`). - CR: `spec.telemetry.metrics.scrapeTimeout`, `driverTypeEnum`, `exemplarKeys`. Defaults match JEP-0013 (`7s`, the driver-type enum, `client,lease_id`). **No** `ServiceMonitor` (Phase 5). - Set `GRPC_TELEMETRY_ENDPOINT` so the telemetry process advertises the in-cluster Service DNS. **TLS:** [jumpstarter-dev#1023](jumpstarter-dev#1023) already landed telemetry TLS on `main`. This PR keeps that path (cert-manager **or** manual `spec.telemetry.grpc.tls.certSecret`, rolling-restart hash, non-fatal missing CA). It does **not** reimplement TLS. **Lab:** in-cluster reverse-scrape of `GET /metrics` on Service port 8080 worked (port-forward). After driver ops, Python OpenMetrics exemplars still fail Go `parseMetricFamilies`; the hub from A omits that snapshot and increments `jumpstarter_metrics_parse_errors_total`. `spec.telemetry.metrics.exemplarKeys` only allowlists keys on the merge path **after** a successful parse — it does not fix exemplar decode. That remains A / JEP DD-3, not this PR. ## DEMO The lab walkthrough for the stacked Phase 3 work (A+B+C+D+E plus lab-only Route) is on the fork demo branch, not this PR: - [DEMO.md](https://github.com/RoddieKieley/jumpstarter/blob/jep-0013-phase3-demo/DEMO.md) - [jep-0013-phase3-demo.cast](https://github.com/RoddieKieley/jumpstarter/blob/jep-0013-phase3-demo/jep-0013-phase3-demo.cast) See [MetricsStream during the lease](https://github.com/RoddieKieley/jumpstarter/blob/jep-0013-phase3-demo/DEMO.md#metricsstream-during-the-lease) for the DD-3 exemplar limitation observed on `:8080`. ## How this PR fits the series ```mermaid flowchart TB A["PR A jumpstarter-dev#1060: proto + hub"] B["PR B this PR: image + metrics port + scrape CR"] C["PR C: exporter MetricsStream client"] D["PR D: Loki HTTP push"] E["PR E: jmp PushLogs"] A --> B A --> C B --> D D --> E ``` | PR | Branch | Status | |----|--------|--------| | A | `jep-0013-phase3-metricsstream` | jumpstarter-dev#1060 | | **B** | `jep-0013-phase3-operator-image` | **This PR** | | C | `jep-0013-phase3-exporter-metricsstream` | jumpstarter-dev#1062 | | D | `jep-0013-phase3-loki-push` | jumpstarter-dev#1063 | | E | `jep-0013-phase3-client-pushlogs` | jumpstarter-dev#1064 | Unique work vs PR A: the operator/image commit on this branch (`435eebee`). If GitHub shows A's commits, that is stacking against `main`; review that unique commit only. ## Out of scope - MetricsStream protocol and parse-error omit (A / jumpstarter-dev#1060) - Exporter MetricsStream client and Register `identity` (C) — after `jumpstarter-dev#1058`, identity must be `exporter_name`, not `Metadata.name` - Loki / PushLogs (D, E), including exporter TFTP errors that only show up on the log path - Advertising a Route/hostname for out-of-cluster exporters (lab-only on the demo branch) - `ServiceMonitor` (Phase 5) ## NOTE Open [jumpstarter-dev#1027](jumpstarter-dev#1027) also touches telemetry operator files (log-ingest e2e).
mangelajo
reviewed
Oct 14, 2026
Forward PushLogs to Loki through a bounded ring buffer so a slow sink
cannot stall exporters; overflow becomes one drop-marker LogEntry and
jumpstarter_telemetry_dropped_total{destination="loki"}.
Signed-off-by: Roddie Kieley <rkieley@redhat.com>
The configured URL can carry userinfo or a query token. Log scheme and host only.
Restoring a failed batch in front of entries accepted during the request could exceed queue depth. Overflow now becomes the existing drop marker.
The final flush stays in Run and starts only after HTTP and gRPC have stopped, so shutdown cannot exit while entries are still buffered. Co-authored-by: Cursor <cursoragent@cursor.com>
Plain HTTP stays available for an endpoint with no token, password, or URL userinfo. Co-authored-by: Cursor <cursoragent@cursor.com>
A 307 or 308 would resend the batch and can carry Authorization onto another URL. The configured endpoint is the only destination. Co-authored-by: Cursor <cursoragent@cursor.com>
Cleanup runs last-registered first, and Server.Close waits for the handler blocked on that release. Co-authored-by: Cursor <cursoragent@cursor.com>
Stdout shipping of the same events double-ingests them, and the telemetry CRD descriptions no longer cite JEP-0013. Co-authored-by: Cursor <cursoragent@cursor.com>
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Summary
JEP-0013 Phase 3 PR D**: forward
PushLogsto Loki so edge logs are not stuck on telemetry stdout.Depends on PR A: #1060
Depends on PR B: #1061
Independent of PR C (#1062) — MetricsStream spoke. Independent of E (
jmpPushLogs) at the protocol layer; E will sit on this branch. Do not merge until A and B are onmain, then rebase.POST /loki/api/v1/push.grpc:///grpcs://are rejected with an error (reserved, not implemented).LogEntry(severity=warning,component=telemetry,operation=backpressure,count/window_seconds) +jumpstarter_telemetry_dropped_total{destination="loki"}.spec.telemetry.loki.{url,secretRef,tls.caSecretRef,tls.insecureSkipVerify}andspec.telemetry.backpressure.queueDepth. Emptyloki.urlremains metrics-only (JEP). Credentials come fromLOKI_USERNAME/LOKI_PASSWORD/LOKI_TOKENviasecretRef./readyzdoes not gate on Loki (metrics-only is valid).Lab: exporter
PushLogs(start/on/wake/ TFTP/HTTP) showed up on telemetry stdout;jumpstarter_telemetry_dropped_total{destination="loki"}stayed 0. Error-severity exporter events (for example TFTPFailed to send block 1) are still re-logged withlogger.Error(nil, message, …), so they look like a telemetry stack in JSON. That mapping is the existing PushLogs stdout path (#930), not a new Loki bug. This PR does not change severity → zap mapping.DEMO
The lab walkthrough for the stacked Phase 3 work (A+B+C+D+E plus lab-only Route) is on the fork demo branch, not this PR:
PushLogs on that run is the operation ledger while reverse-scrape omits exemplar-bearing snapshots (A / DD-3).
How this PR fits the series
jep-0013-phase3-metricsstreamjep-0013-phase3-operator-imagejep-0013-phase3-exporter-metricsstreamjep-0013-phase3-loki-pushjep-0013-phase3-client-pushlogsUnique work vs A+B:
ac7e0835. If GitHub shows A/B commits, that is stacking againstmain; review that unique commit only.Out of scope
/telemetryimage, metrics:8080, scrape CR fields (B / JEP-0013 Phase 3 - operator image #1061)identity(C / JEP-0013 Phase 3 - exporter MetricsStream #1062)jmpPushLogs / client tokens (E)logger.Error(nil, …)for exporter error events (TFTP dual-RRQ noise in the lab)NOTE
Open #1027 also touches telemetry operator files (log-ingest e2e).