fix(transforms): optional metric namespace in log_to_metric transform

[jorgehermo9]

Closes #21423

Now this config

[sources.sample]
type = "demo_logs"
lines = ["weather,location=us-midwest temperature=82 1465839830100400200"]
format = "shuffle"

[transforms.influx]
type = "remap"
inputs = ["sample"]
source = """
. = parse_influxdb!(.message)
"""

[transforms.log_to_metric]
type = "log_to_metric"
inputs = ["influx"]
all_metrics = true
metrics = []

[sinks.console]
type = "console"
inputs = ["log_to_metric"]
encoding.codec = "native_json"

Produces the following output:

2024-10-05T09:19:29.994825Z  INFO vector::app: Log level is enabled. level="info"
2024-10-05T09:19:29.996361Z  INFO vector::app: Loading configs. paths=["config.toml"]
2024-10-05T09:19:30.009987Z  INFO vector::topology::running: Running healthchecks.
2024-10-05T09:19:30.010365Z  INFO vector::topology::builder: Healthcheck passed.
2024-10-05T09:19:30.010418Z  INFO vector: Vector has started. debug="true" version="0.42.0" arch="x86_64" revision=""
2024-10-05T09:19:30.010485Z  INFO vector::app: API is disabled, enable by setting `api.enabled` to `true` and use commands like `vector top`.
{"metric":{"name":"weather_temperature","tags":{"location":"us-midwest"},"timestamp":"2016-06-13T17:43:50.100400200Z","kind":"absolute","gauge":{"value":82.0}}}
{"metric":{"name":"weather_temperature","tags":{"location":"us-midwest"},"timestamp":"2016-06-13T17:43:50.100400200Z","kind":"absolute","gauge":{"value":82.0}}}
{"metric":{"name":"weather_temperature","tags":{"location":"us-midwest"},"timestamp":"2016-06-13T17:43:50.100400200Z","kind":"absolute","gauge":{"value":82.0}}}

[jorgehermo9]

Refactored this function a little bit to not duplicate code

[jorgehermo9]

Added just one test with the counter metric kind.

If you find that it would be useful to replicate this test with the other metric kinds, tell me

[jszwedko]

Thanks for this quick fix!

[github-actions]

Regression Detector Results

Run ID: 009d8826-5ca2-4bb5-baa3-669a3b93dafd Metrics dashboard

Baseline: 3dfdfbd
Comparison: 7563b83

Performance changes are noted in the perf column of each table:

• ✅ = significantly better comparison variant performance
• ❌ = significantly worse comparison variant performance
• ➖ = no significant change in performance

No significant changes in experiment optimization goals

Confidence level: 90.00%
Effect size tolerance: |Δ mean %| ≥ 5.00%

There were no significant changes in experiment optimization goals at this confidence level and effect size tolerance.

Experiments ignored for regressions

Regressions in experiments with settings containing erratic: true are ignored.

perf	experiment	goal	Δ mean %	Δ mean % CI	links
✅	file_to_blackhole	egress throughput	+32.24	[+24.07, +40.41]

Fine details of change detection per experiment

perf	experiment	goal	Δ mean %	Δ mean % CI	links
✅	file_to_blackhole	egress throughput	+32.24	[+24.07, +40.41]
➖	syslog_humio_logs	ingress throughput	+1.99	[+1.90, +2.07]
➖	http_text_to_http_json	ingress throughput	+1.48	[+1.36, +1.59]
➖	syslog_log2metric_splunk_hec_metrics	ingress throughput	+0.64	[+0.54, +0.75]
➖	syslog_splunk_hec_logs	ingress throughput	+0.33	[+0.24, +0.41]
➖	http_to_http_noack	ingress throughput	+0.16	[+0.08, +0.25]
➖	splunk_hec_route_s3	ingress throughput	+0.16	[-0.15, +0.48]
➖	datadog_agent_remap_blackhole	ingress throughput	+0.15	[+0.04, +0.26]
➖	datadog_agent_remap_datadog_logs_acks	ingress throughput	+0.10	[-0.10, +0.31]
➖	http_elasticsearch	ingress throughput	+0.05	[-0.12, +0.22]
➖	http_to_http_json	ingress throughput	+0.02	[-0.02, +0.05]
➖	splunk_hec_to_splunk_hec_logs_noack	ingress throughput	+0.01	[-0.09, +0.11]
➖	splunk_hec_to_splunk_hec_logs_acks	ingress throughput	-0.00	[-0.11, +0.10]
➖	splunk_hec_indexer_ack_blackhole	ingress throughput	-0.01	[-0.09, +0.08]
➖	socket_to_socket_blackhole	ingress throughput	-0.03	[-0.09, +0.02]
➖	http_to_http_acks	ingress throughput	-0.10	[-1.32, +1.11]
➖	otlp_grpc_to_blackhole	ingress throughput	-0.26	[-0.37, -0.15]
➖	otlp_http_to_blackhole	ingress throughput	-0.28	[-0.41, -0.15]
➖	syslog_loki	ingress throughput	-0.31	[-0.39, -0.23]
➖	syslog_log2metric_tag_cardinality_limit_blackhole	ingress throughput	-0.39	[-0.50, -0.28]
➖	http_to_s3	ingress throughput	-0.47	[-0.74, -0.20]
➖	datadog_agent_remap_datadog_logs	ingress throughput	-0.51	[-0.72, -0.30]
➖	datadog_agent_remap_blackhole_acks	ingress throughput	-0.69	[-0.79, -0.59]
➖	syslog_regex_logs2metric_ddmetrics	ingress throughput	-1.14	[-1.27, -1.01]
➖	fluent_elasticsearch	ingress throughput	-1.52	[-2.01, -1.03]
➖	syslog_log2metric_humio_metrics	ingress throughput	-1.64	[-1.73, -1.54]

Explanation

A regression test is an A/B test of target performance in a repeatable rig, where "performance" is measured as "comparison variant minus baseline variant" for an optimization goal (e.g., ingress throughput). Due to intrinsic variability in measuring that goal, we can only estimate its mean value for each experiment; we report uncertainty in that value as a 90.00% confidence interval denoted "Δ mean % CI".

For each experiment, we decide whether a change in performance is a "regression" -- a change worth investigating further -- if all of the following criteria are true:

1. Its estimated |Δ mean %| ≥ 5.00%, indicating the change is big enough to merit a closer look.

2. Its 90.00% confidence interval "Δ mean % CI" does not contain zero, indicating that if our statistical model is accurate, there is at least a 90.00% chance there is a difference in performance between baseline and comparison variants.

3. Its configuration does not mark it "erratic".

[github-actions]

Regression Detector Results

Run ID: 6e8a2bb0-c7e8-4908-b682-1dc32b1846f3 Metrics dashboard

Baseline: 3eecbe7
Comparison: 51dcf8d

Performance changes are noted in the perf column of each table:

• ✅ = significantly better comparison variant performance
• ❌ = significantly worse comparison variant performance
• ➖ = no significant change in performance

No significant changes in experiment optimization goals

Confidence level: 90.00%
Effect size tolerance: |Δ mean %| ≥ 5.00%

There were no significant changes in experiment optimization goals at this confidence level and effect size tolerance.

Experiments ignored for regressions

Regressions in experiments with settings containing erratic: true are ignored.

perf	experiment	goal	Δ mean %	Δ mean % CI	links
❌	file_to_blackhole	egress throughput	-13.65	[-20.21, -7.10]

Fine details of change detection per experiment

perf	experiment	goal	Δ mean %	Δ mean % CI	links
➖	syslog_regex_logs2metric_ddmetrics	ingress throughput	+3.34	[+3.20, +3.47]
➖	http_text_to_http_json	ingress throughput	+2.42	[+2.30, +2.55]
➖	syslog_splunk_hec_logs	ingress throughput	+1.86	[+1.79, +1.92]
➖	splunk_hec_route_s3	ingress throughput	+1.47	[+1.16, +1.79]
➖	syslog_loki	ingress throughput	+1.23	[+1.16, +1.31]
➖	syslog_log2metric_tag_cardinality_limit_blackhole	ingress throughput	+1.11	[+1.03, +1.19]
➖	http_elasticsearch	ingress throughput	+0.86	[+0.71, +1.01]
➖	datadog_agent_remap_blackhole_acks	ingress throughput	+0.77	[+0.65, +0.88]
➖	otlp_grpc_to_blackhole	ingress throughput	+0.37	[+0.26, +0.48]
➖	syslog_log2metric_splunk_hec_metrics	ingress throughput	+0.26	[+0.15, +0.38]
➖	http_to_s3	ingress throughput	+0.20	[-0.06, +0.46]
➖	http_to_http_acks	ingress throughput	+0.05	[-1.17, +1.28]
➖	http_to_http_json	ingress throughput	+0.05	[+0.01, +0.10]
➖	http_to_http_noack	ingress throughput	+0.02	[-0.01, +0.06]
➖	splunk_hec_to_splunk_hec_logs_noack	ingress throughput	+0.01	[-0.09, +0.11]
➖	splunk_hec_to_splunk_hec_logs_acks	ingress throughput	+0.00	[-0.11, +0.12]
➖	splunk_hec_indexer_ack_blackhole	ingress throughput	+0.00	[-0.08, +0.08]
➖	socket_to_socket_blackhole	ingress throughput	-0.02	[-0.08, +0.04]
➖	datadog_agent_remap_datadog_logs	ingress throughput	-0.09	[-0.30, +0.12]
➖	fluent_elasticsearch	ingress throughput	-0.19	[-0.68, +0.30]
➖	otlp_http_to_blackhole	ingress throughput	-0.20	[-0.34, -0.05]
➖	datadog_agent_remap_blackhole	ingress throughput	-0.38	[-0.49, -0.28]
➖	datadog_agent_remap_datadog_logs_acks	ingress throughput	-0.49	[-0.64, -0.34]
➖	syslog_humio_logs	ingress throughput	-0.79	[-0.89, -0.68]
➖	syslog_log2metric_humio_metrics	ingress throughput	-3.68	[-3.82, -3.55]
❌	file_to_blackhole	egress throughput	-13.65	[-20.21, -7.10]

Explanation

A regression test is an A/B test of target performance in a repeatable rig, where "performance" is measured as "comparison variant minus baseline variant" for an optimization goal (e.g., ingress throughput). Due to intrinsic variability in measuring that goal, we can only estimate its mean value for each experiment; we report uncertainty in that value as a 90.00% confidence interval denoted "Δ mean % CI".

For each experiment, we decide whether a change in performance is a "regression" -- a change worth investigating further -- if all of the following criteria are true:

1. Its estimated |Δ mean %| ≥ 5.00%, indicating the change is big enough to merit a closer look.

2. Its 90.00% confidence interval "Δ mean % CI" does not contain zero, indicating that if our statistical model is accurate, there is at least a 90.00% chance there is a difference in performance between baseline and comparison variants.

3. Its configuration does not mark it "erratic".