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Implementing Prometheus Exporter and documentation #534

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Implementing Prometheus Exporter and documentation #534

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a998c8e
Implementing Prometheus Exporter and documentation as in #477
flaviostutz Jul 22, 2023
3b5de89
Separating prom http metrics logic from server; updating query exampl…
flaviostutz Jul 23, 2023
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21 changes: 21 additions & 0 deletions Dockerfile
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@@ -0,0 +1,21 @@
FROM golang:1.14.4-alpine3.12 AS BUILD

RUN apk add make build-base

WORKDIR /vegeta

# cache dependencies
ADD go.mod /vegeta
ADD go.sum /vegeta
RUN go mod download

# now build source code
ADD / /vegeta

RUN make vegeta

FROM alpine:3.12.0

COPY --from=BUILD /vegeta/vegeta /bin/vegeta

ENTRYPOINT [ "" ]
61 changes: 60 additions & 1 deletion README.md
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Expand Up @@ -126,6 +126,8 @@ attack command:
Attack name
-output string
Output file (default "stdout")
-prometheus-url
Prometheus metrics bind url for enabling Prometheus metrics exporter. Ex.: "http://0.0.0.0:8880"
-proxy-header value
Proxy CONNECT header
-rate value
Expand Down Expand Up @@ -783,6 +785,8 @@ It'll read and sort them by timestamp before generating reports.
vegeta report *.bin
```

Another way to gather results in distributed tests is to use the built-in Prometheus Exporter and configure a Prometheus Server to get test results from all Vegeta instances. See `attack` option "prometheus-url" for more details and a complete example in the section "Prometheus Exporter Support"

## Usage: Real-time Analysis

If you are a happy user of iTerm, you can integrate vegeta with [jplot](https://github.com/rs/jplot) using [jaggr](https://github.com/rs/jaggr) to plot a vegeta report in real-time in the comfort of your terminal:
Expand All @@ -802,7 +806,7 @@ echo 'GET http://localhost:8080' | \

![](https://i.imgur.com/ttBDsQS.gif)

## Usage (Library)
## Usage: Library

The library versioning follows [SemVer v2.0.0](https://semver.org/spec/v2.0.0.html).
Since [lib/v9.0.0](https://github.com/tsenart/vegeta/tree/lib/v9.0.0), the library and cli
Expand Down Expand Up @@ -859,6 +863,61 @@ $ ulimit -u # processes / threads

Just pass a new number as the argument to change it.

## Prometheus Support

Vegeta has a built-in Prometheus Exporter that may be enabled during "attacks" so that you can point any Prometheus instance to Vegeta instances and get some metrics about http requests performance and about the Vegeta process itself.
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While I like this for a lot reasons, I think vegeta should be exporting metrics to a Prometheus push gateway rather than being scraped directly by prometheus.

Since vegeta isn't a long lived process you'll have race conditions where Prometheus might not scrape the last bit of attack data before vegeta shuts down.

Prometheus best practices docs say you should use push gateway for "service-level batch jobs" which is what I think vegeta would qualify as:

Usually, the only valid use case for the Pushgateway is for capturing the outcome of a service-level batch job. A "service-level" batch job is one which is not semantically related to a specific machine or job instance (for example, a batch job that deletes a number of users for an entire service). Such a job's metrics should not include a machine or instance label to decouple the lifecycle of specific machines or instances from the pushed metrics. This decreases the burden for managing stale metrics in the Pushgateway. See also the best practices for monitoring batch jobs.

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I bring this up, bc I think it should instead have, or at least additionally offer, a report type of prom which will then export metrics from a report to a prometheus push gateway.

I am currently writing that for datadog rather than Prometheus but the idea is the same. The advantage of the report is that one could take an existing Vegeta test result and push into a metrics store rather than having to run a new test.

And the user could publish the results to a Prometheus and a DataDog and wherever else they needed with the reporting decoupled from the attacking.

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Note to self: When -prometheus-addr is set and we start an HTTP server for prometheus to scrape, make sure that all metrics are scrapped before exiting from the program, even after the attack finished per se.


To enable the Prometheus Exporter on the command line, use the "prometheus-url" flag.

A Prometheus HTTP endpoint will be available only during the lifespan of an "attack" and will be closed right after the attack is finished.

The following metrics are exposed:

* `request_bytes_in` - bytes count received from targeted servers by "url", "method" and "status"
* `request_bytes_out` - bytes count sent to targeted server by "url", "method" and "status"
* `request_seconds` - histogram with request latency and counters by "url", "method" and "status"
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<image src="prometheus-sample.png" width="500" />

### Prometheus Exporter Example

* Create a docker-compose.yml

```
version: '3.5'
services:
vegeta:
image: tsenart/vegeta
ports:
- 8880:8880
command: sh -c 'echo "GET https://www.yahoo.com" | vegeta attack -duration=30s -rate=5 -prometheus-url=http://0.0.0.0:8880'

prometheus:
image: flaviostutz/prometheus:2.19.2.0
ports:
- 9090:9090
environment:
- SCRAPE_INTERVAL=10s
- SCRAPE_TIMEOUT=10s
- STATIC_SCRAPE_TARGETS=vegeta@vegeta:8880
```

* Run `docker-compose up -d`

* Run `curl localhost:8880` to see plain Prometheus Exporter endpoint contents

* Open Prometheus server instance with your browser at http://localhost:9090

* Go to "Graph" and execute query `rate(request_seconds_sum[1m])` and then select the "Graph" tab to see a graph with latency over time

### More resources

* See https://prometheus.io/docs/prometheus/latest/querying/basics/ for query details

* Use Grafana for creating stateful dashboards. Get a sample dashboard for Vegeta [here](grafana.json)

* For more elaborated scenarios, see https://github.com/flaviostutz/promster so that you can automatically register new Vegeta Prometheus Exporter instances to Prometheus in elastic scenarios.

## License

See [LICENSE](LICENSE).
Expand Down
18 changes: 17 additions & 1 deletion attack.go
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Expand Up @@ -17,6 +17,7 @@ import (

"github.com/tsenart/vegeta/v12/internal/resolver"
vegeta "github.com/tsenart/vegeta/v12/lib"
prom "github.com/tsenart/vegeta/v12/lib/prom"
)

func attackCmd() command {
Expand All @@ -27,6 +28,7 @@ func attackCmd() command {
laddr: localAddr{&vegeta.DefaultLocalAddr},
rate: vegeta.Rate{Freq: 50, Per: time.Second},
maxBody: vegeta.DefaultMaxBody,
promURL: "0.0.0.0:8880",
}
fs.StringVar(&opts.name, "name", "", "Attack name")
fs.StringVar(&opts.targetsf, "targets", "stdin", "Targets file")
Expand Down Expand Up @@ -56,6 +58,7 @@ func attackCmd() command {
fs.Var(&opts.laddr, "laddr", "Local IP address")
fs.BoolVar(&opts.keepalive, "keepalive", true, "Use persistent connections")
fs.StringVar(&opts.unixSocket, "unix-socket", "", "Connect over a unix socket. This overrides the host address in target URLs")
fs.StringVar(&opts.promURL, "prometheus-url", "", "Enable Prometheus metrics with specific bind parameters in format [bind ip]:[bind port]. Example: 0.0.0.0:8880")
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fs.Var(&dnsTTLFlag{&opts.dnsTTL}, "dns-ttl", "Cache DNS lookups for the given duration [-1 = disabled, 0 = forever]")
fs.BoolVar(&opts.sessionTickets, "session-tickets", false, "Enable TLS session resumption using session tickets")
systemSpecificFlags(fs, opts)
Expand Down Expand Up @@ -101,6 +104,7 @@ type attackOpts struct {
keepalive bool
resolvers csl
unixSocket string
promURL string
dnsTTL time.Duration
sessionTickets bool
}
Expand Down Expand Up @@ -178,6 +182,14 @@ func attack(opts *attackOpts) (err error) {
return err
}

var promMetrics *prom.PrometheusMetrics
if opts.promURL != "" {
promMetrics, err = prom.NewPrometheusMetricsWithParams(opts.promURL)
if err != nil {
return err
}
}

atk := vegeta.NewAttacker(
vegeta.Redirects(opts.redirects),
vegeta.Timeout(opts.timeout),
Expand All @@ -203,14 +215,15 @@ func attack(opts *attackOpts) (err error) {
sig := make(chan os.Signal, 1)
signal.Notify(sig, os.Interrupt, syscall.SIGTERM)

return processAttack(atk, res, enc, sig)
return processAttack(atk, res, enc, sig, promMetrics)
}

func processAttack(
atk *vegeta.Attacker,
res <-chan *vegeta.Result,
enc vegeta.Encoder,
sig <-chan os.Signal,
promMetrics *prom.PrometheusMetrics,
) error {
for {
select {
Expand All @@ -223,6 +236,9 @@ func processAttack(
if !ok {
return nil
}
if promMetrics != nil {
promMetrics.Observe(r)
}
if err := enc.Encode(r); err != nil {
return err
}
Expand Down
4 changes: 2 additions & 2 deletions attack_test.go
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Expand Up @@ -86,7 +86,7 @@ func TestAttackSignalOnce(t *testing.T) {
wg.Add(1)
go func() {
defer wg.Done()
processAttack(atk, res, enc, sig)
processAttack(atk, res, enc, sig, nil)
}()

// Allow more than one request to have started before stopping.
Expand Down Expand Up @@ -139,7 +139,7 @@ func TestAttackSignalTwice(t *testing.T) {
wg.Add(1)
go func() {
defer wg.Done()
processAttack(atk, res, enc, sig)
processAttack(atk, res, enc, sig, nil)
}()

// Exit as soon as possible.
Expand Down
27 changes: 27 additions & 0 deletions docker-compose.yml
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Original file line number Diff line number Diff line change
@@ -0,0 +1,27 @@
version: '3.5'

services:

vegeta:
build: .
image: tsenart/vegeta
ports:
- 8880:8880
command: sh -c 'echo "GET https://www.yahoo.com" | vegeta attack -duration=30s -rate=5 -prometheus-url=0.0.0.0:8880'

prometheus:
image: flaviostutz/prometheus
ports:
- 9090:9090
environment:
- SCRAPE_INTERVAL=10s
- SCRAPE_TIMEOUT=10s
- STATIC_SCRAPE_TARGETS=vegeta@vegeta:8880

grafana:
image: flaviostutz/grafana:5.2.4
ports:
- 3000:3000
environment:
- GF_SECURITY_ADMIN_PASSWORD=mypass

9 changes: 9 additions & 0 deletions go.mod
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Expand Up @@ -12,6 +12,7 @@ require (
github.com/influxdata/tdigest v0.0.1
github.com/mailru/easyjson v0.7.7
github.com/miekg/dns v1.1.55
github.com/prometheus/client_golang v1.16.0
github.com/rs/dnscache v0.0.0-20211102005908-e0241e321417
github.com/streadway/quantile v0.0.0-20220407130108-4246515d968d
github.com/tsenart/go-tsz v0.0.0-20180814235614-0bd30b3df1c3
Expand All @@ -20,12 +21,20 @@ require (
)

require (
github.com/beorn7/perks v1.0.1 // indirect
github.com/cespare/xxhash/v2 v2.2.0 // indirect
github.com/golang/protobuf v1.5.3 // indirect
github.com/iancoleman/orderedmap v0.3.0 // indirect
github.com/josharian/intern v1.0.0 // indirect
github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
github.com/prometheus/client_model v0.3.0 // indirect
github.com/prometheus/common v0.42.0 // indirect
github.com/prometheus/procfs v0.10.1 // indirect
golang.org/x/exp v0.0.0-20230713183714-613f0c0eb8a1 // indirect
golang.org/x/mod v0.12.0 // indirect
golang.org/x/sync v0.3.0 // indirect
golang.org/x/sys v0.10.0 // indirect
golang.org/x/text v0.11.0 // indirect
golang.org/x/tools v0.11.0 // indirect
google.golang.org/protobuf v1.30.0 // indirect
)
36 changes: 35 additions & 1 deletion go.sum
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Original file line number Diff line number Diff line change
@@ -1,16 +1,28 @@
github.com/alecthomas/jsonschema v0.0.0-20220216202328-9eeeec9d044b h1:doCpXjVwui6HUN+xgNsNS3SZ0/jUZ68Eb+mJRNOZfog=
github.com/alecthomas/jsonschema v0.0.0-20220216202328-9eeeec9d044b/go.mod h1:/n6+1/DWPltRLWL/VKyUxg6tzsl5kHUCcraimt4vr60=
github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
github.com/bmizerany/perks v0.0.0-20230307044200-03f9df79da1e h1:mWOqoK5jV13ChKf/aF3plwQ96laasTJgZi4f1aSOu+M=
github.com/bmizerany/perks v0.0.0-20230307044200-03f9df79da1e/go.mod h1:ac9efd0D1fsDb3EJvhqgXRbFx7bs2wqZ10HQPeU8U/Q=
github.com/c2h5oh/datasize v0.0.0-20220606134207-859f65c6625b h1:6+ZFm0flnudZzdSE0JxlhR2hKnGPcNB35BjQf4RYQDY=
github.com/c2h5oh/datasize v0.0.0-20220606134207-859f65c6625b/go.mod h1:S/7n9copUssQ56c7aAgHqftWO4LTf4xY6CGWt8Bc+3M=
github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/dgryski/go-gk v0.0.0-20200319235926-a69029f61654 h1:XOPLOMn/zT4jIgxfxSsoXPxkrzz0FaCHwp33x5POJ+Q=
github.com/dgryski/go-gk v0.0.0-20200319235926-a69029f61654/go.mod h1:qm+vckxRlDt0aOla0RYJJVeqHZlWfOm2UIxHaqPB46E=
github.com/dgryski/go-lttb v0.0.0-20230207170358-f8fc36cdbff1 h1:dxwR3CStJdJamsIoMPCmxuIfBAPTgmzvFax+MvFav3M=
github.com/dgryski/go-lttb v0.0.0-20230207170358-f8fc36cdbff1/go.mod h1:UwftcHUI/qTYvLAxrWmANuRckf8+08O3C3hwStvkhDU=
github.com/go-logfmt/logfmt v0.5.1/go.mod h1:WYhtIu8zTZfxdn5+rREduYbwxfcBr/Vr6KEVveWlfTs=
github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
github.com/golang/protobuf v1.3.5/go.mod h1:6O5/vntMXwX2lRkT1hjjk0nAC1IDOTvTlVgjlRvqsdk=
github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
github.com/golang/protobuf v1.5.3 h1:KhyjKVUg7Usr/dYsdSqoFveMYd5ko72D+zANwlG1mmg=
github.com/golang/protobuf v1.5.3/go.mod h1:XVQd3VNwM+JqD3oG2Ue2ip4fOMUkwXdXDdiuN0vRsmY=
github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
github.com/google/go-cmp v0.5.9 h1:O2Tfq5qg4qc4AmwVlvv0oLiVAGB7enBSJ2x2DqQFi38=
github.com/google/go-cmp v0.5.9/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
github.com/iancoleman/orderedmap v0.0.0-20190318233801-ac98e3ecb4b0/go.mod h1:N0Wam8K1arqPXNWjMo21EXnBPOPp36vB07FNRdD2geA=
Expand All @@ -20,18 +32,33 @@ github.com/influxdata/tdigest v0.0.1 h1:XpFptwYmnEKUqmkcDjrzffswZ3nvNeevbUSLPP/Z
github.com/influxdata/tdigest v0.0.1/go.mod h1:Z0kXnxzbTC2qrx4NaIzYkE1k66+6oEDQTvL95hQFh5Y=
github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8HmY=
github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=
github.com/jpillora/backoff v1.0.0/go.mod h1:J/6gKK9jxlEcS3zixgDgUAsiuZ7yrSoa/FX5e0EB2j4=
github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
github.com/julienschmidt/httprouter v1.3.0/go.mod h1:JR6WtHb+2LUe8TCKY3cZOxFyyO8IZAc4RVcycCCAKdM=
github.com/mailru/easyjson v0.7.7 h1:UGYAvKxe3sBsEDzO8ZeWOSlIQfWFlxbzLZe7hwFURr0=
github.com/mailru/easyjson v0.7.7/go.mod h1:xzfreul335JAWq5oZzymOObrkdz5UnU4kGfJJLY9Nlc=
github.com/matttproud/golang_protobuf_extensions v1.0.4 h1:mmDVorXM7PCGKw94cs5zkfA9PSy5pEvNWRP0ET0TIVo=
github.com/matttproud/golang_protobuf_extensions v1.0.4/go.mod h1:BSXmuO+STAnVfrANrmjBb36TMTDstsz7MSK+HVaYKv4=
github.com/miekg/dns v1.1.55 h1:GoQ4hpsj0nFLYe+bWiCToyrBEJXkQfOOIvFGFy0lEgo=
github.com/miekg/dns v1.1.55/go.mod h1:uInx36IzPl7FYnDcMeVWxj9byh7DutNykX4G9Sj60FY=
github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
github.com/modern-go/reflect2 v1.0.2/go.mod h1:yWuevngMOJpCy52FWWMvUC8ws7m/LJsjYzDa0/r8luk=
github.com/mwitkow/go-conntrack v0.0.0-20190716064945-2f068394615f/go.mod h1:qRWi+5nqEBWmkhHvq77mSJWrCKwh8bxhgT7d/eI7P4U=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/prometheus/client_golang v1.16.0 h1:yk/hx9hDbrGHovbci4BY+pRMfSuuat626eFsHb7tmT8=
github.com/prometheus/client_golang v1.16.0/go.mod h1:Zsulrv/L9oM40tJ7T815tM89lFEugiJ9HzIqaAx4LKc=
github.com/prometheus/client_model v0.3.0 h1:UBgGFHqYdG/TPFD1B1ogZywDqEkwp3fBMvqdiQ7Xew4=
github.com/prometheus/client_model v0.3.0/go.mod h1:LDGWKZIo7rky3hgvBe+caln+Dr3dPggB5dvjtD7w9+w=
github.com/prometheus/common v0.42.0 h1:EKsfXEYo4JpWMHH5cg+KOUWeuJSov1Id8zGR8eeI1YM=
github.com/prometheus/common v0.42.0/go.mod h1:xBwqVerjNdUDjgODMpudtOMwlOwf2SaTr1yjz4b7Zbc=
github.com/prometheus/procfs v0.10.1 h1:kYK1Va/YMlutzCGazswoHKo//tZVlFpKYh+PymziUAg=
github.com/prometheus/procfs v0.10.1/go.mod h1:nwNm2aOCAYw8uTR/9bWRREkZFxAUcWzPHWJq+XBB/FM=
github.com/rs/dnscache v0.0.0-20211102005908-e0241e321417 h1:Lt9DzQALzHoDwMBGJ6v8ObDPR0dzr2a6sXTB1Fq7IHs=
github.com/rs/dnscache v0.0.0-20211102005908-e0241e321417/go.mod h1:qe5TWALJ8/a1Lqznoc5BDHpYX/8HU60Hm2AwRmqzxqA=
github.com/streadway/quantile v0.0.0-20220407130108-4246515d968d h1:X4+kt6zM/OVO6gbJdAfJR60MGPsqCzbtXNnjoGqdfAs=
github.com/streadway/quantile v0.0.0-20220407130108-4246515d968d/go.mod h1:lbP8tGiBjZ5YWIc2fzuRpTaz0b/53vT6PEs3QuAWzuU=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.3.1-0.20190311161405-34c6fa2dc709 h1:Ko2LQMrRU+Oy/+EDBwX7eZ2jp3C47eDBB8EIhKTun+I=
github.com/stretchr/testify v1.3.1-0.20190311161405-34c6fa2dc709/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
github.com/tsenart/go-tsz v0.0.0-20180814235614-0bd30b3df1c3 h1:pcQGQzTwCg//7FgVywqge1sW9Yf8VMsMdG58MI5kd8s=
github.com/tsenart/go-tsz v0.0.0-20180814235614-0bd30b3df1c3/go.mod h1:SWZznP1z5Ki7hDT2ioqiFKEse8K9tU2OUvaRI0NeGQo=
Expand All @@ -42,6 +69,7 @@ golang.org/x/mod v0.12.0 h1:rmsUpXtvNzj340zd98LZ4KntptpfRHwpFOHG188oHXc=
golang.org/x/mod v0.12.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
golang.org/x/net v0.12.0 h1:cfawfvKITfUsFCeJIHJrbSxpeu/E81khclypR0GVT50=
golang.org/x/net v0.12.0/go.mod h1:zEVYFnQC7m/vmpQFELhcD1EWkZlX69l4oqgmer6hfKA=
golang.org/x/sync v0.0.0-20181221193216-37e7f081c4d4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
golang.org/x/sync v0.3.0 h1:ftCYgMx6zT/asHUrPw8BLLscYtGznsLAnjq5RH9P66E=
golang.org/x/sync v0.3.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
Expand All @@ -52,8 +80,14 @@ golang.org/x/text v0.11.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
golang.org/x/tools v0.0.0-20180525024113-a5b4c53f6e8b/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
golang.org/x/tools v0.11.0 h1:EMCa6U9S2LtZXLAMoWiR/R8dAQFRqbAitmbJ2UKhoi8=
golang.org/x/tools v0.11.0/go.mod h1:anzJrxPjNtfgiYQYirP2CPGzGLxrH2u2QBhn6Bf3qY8=
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
gonum.org/v1/gonum v0.0.0-20181121035319-3f7ecaa7e8ca h1:PupagGYwj8+I4ubCxcmcBRk3VlUWtTg5huQpZR9flmE=
gonum.org/v1/gonum v0.0.0-20181121035319-3f7ecaa7e8ca/go.mod h1:Y+Yx5eoAFn32cQvJDxZx5Dpnq+c3wtXuadVZAcxbbBo=
gonum.org/v1/netlib v0.0.0-20181029234149-ec6d1f5cefe6/go.mod h1:wa6Ws7BG/ESfp6dHfk7C6KdzKA7wR7u/rKwOGE66zvw=
google.golang.org/protobuf v1.26.0-rc.1/go.mod h1:jlhhOSvTdKEhbULTjvd4ARK9grFBp09yW+WbY/TyQbw=
google.golang.org/protobuf v1.26.0/go.mod h1:9q0QmTI4eRPtz6boOQmLYwt+qCgq0jsYwAQnmE0givc=
google.golang.org/protobuf v1.30.0 h1:kPPoIgf3TsEvrm0PFe15JQ+570QVxYzEvvHqChK+cng=
google.golang.org/protobuf v1.30.0/go.mod h1:HV8QOd/L58Z+nl8r43ehVNZIU/HEI6OcFqwMG9pJV4I=
gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
pgregory.net/rapid v1.0.0 h1:iQaM2w5PZ6xvt6x7hbd7tiDS+nk7YPp5uCaEba+T/F4=
pgregory.net/rapid v1.0.0/go.mod h1:PY5XlDGj0+V1FCq0o192FdRhpKHGTRIWBgqjDBTrq04=
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