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roachtests: introduce admission-control/elastic-backup
Informs #89208. This test sets up a 3-node CRDB cluster on 8vCPU machines running 1000-warehouse TPC-C with an aggressive (every 20m) full backup schedule. We've observed latency spikes during backups because of its CPU-heavy nature -- it can elevate CPU scheduling latencies which in turn translates to an increase in foreground latency. In #86638 we introduced admission control mechanisms to dynamically pace such work while maintaining acceptable CPU scheduling latencies (sub millisecond p99s). This roachtest exercises that machinery. In future commits we'll add libraries to the roachtest package to automatically spit out the degree to which {CPU-scheduler,foreground} latencies are protected. Release note: None
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110 changes: 110 additions & 0 deletions
110
pkg/cmd/roachtest/tests/admission_control_elastic_backup.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,110 @@ | ||
| // Copyright 2022 The Cockroach Authors. | ||
| // | ||
| // Use of this software is governed by the Business Source License | ||
| // included in the file licenses/BSL.txt. | ||
| // | ||
| // As of the Change Date specified in that file, in accordance with | ||
| // the Business Source License, use of this software will be governed | ||
| // by the Apache License, Version 2.0, included in the file | ||
| // licenses/APL.txt. | ||
|
|
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| package tests | ||
|
|
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| import ( | ||
| "context" | ||
| "fmt" | ||
| "time" | ||
|
|
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| "github.com/cockroachdb/cockroach/pkg/cmd/roachtest/cluster" | ||
| "github.com/cockroachdb/cockroach/pkg/cmd/roachtest/registry" | ||
| "github.com/cockroachdb/cockroach/pkg/cmd/roachtest/spec" | ||
| "github.com/cockroachdb/cockroach/pkg/cmd/roachtest/test" | ||
| "github.com/cockroachdb/cockroach/pkg/roachprod/prometheus" | ||
| ) | ||
|
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| // This test sets up a 3-node CRDB cluster on 8vCPU machines running | ||
| // 1000-warehouse TPC-C with an aggressive (every 20m) full backup schedule. | ||
| // We've observed latency spikes during backups because of its CPU-heavy nature | ||
| // -- it can elevate CPU scheduling latencies which in turn translates to an | ||
| // increase in foreground latency. In #86638 we introduced admission control | ||
| // mechanisms to dynamically pace such work while maintaining acceptable CPU | ||
| // scheduling latencies (sub millisecond p99s). This roachtest exercises that | ||
| // machinery. | ||
| // | ||
| // TODO(irfansharif): Add libraries to automatically spit out the degree to | ||
| // which {CPU-scheduler,foreground} latencies are protected and track this data | ||
| // in roachperf. | ||
| func registerElasticControlForBackups(r registry.Registry) { | ||
| r.Add(registry.TestSpec{ | ||
| Name: "admission-control/elastic-backup", | ||
| Owner: registry.OwnerAdmissionControl, | ||
| // TODO(irfansharif): After two weeks of nightly baking time, reduce | ||
| // this to a weekly cadence. This is a long-running test and serves only | ||
| // as a coarse-grained benchmark. | ||
| // Tags: []string{`weekly`}, | ||
| Cluster: r.MakeClusterSpec(4, spec.CPU(8)), | ||
| Run: func(ctx context.Context, t test.Test, c cluster.Cluster) { | ||
| if c.Spec().NodeCount < 4 { | ||
| t.Fatalf("expected at least 4 nodes, found %d", c.Spec().NodeCount) | ||
| } | ||
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| crdbNodes := c.Spec().NodeCount - 1 | ||
| workloadNode := crdbNodes + 1 | ||
| numWarehouses, workloadDuration, estimatedSetupTime := 1000, 90*time.Minute, 10*time.Minute | ||
| if c.IsLocal() { | ||
| numWarehouses, workloadDuration, estimatedSetupTime = 1, time.Minute, 2*time.Minute | ||
| } | ||
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| promCfg := &prometheus.Config{} | ||
| promCfg.WithPrometheusNode(c.Node(workloadNode).InstallNodes()[0]). | ||
| WithNodeExporter(c.Range(1, c.Spec().NodeCount-1).InstallNodes()). | ||
| WithCluster(c.Range(1, c.Spec().NodeCount-1).InstallNodes()). | ||
| WithGrafanaDashboard("http://go.crdb.dev/p/backup-admission-control-grafana"). | ||
| WithScrapeConfigs( | ||
| prometheus.MakeWorkloadScrapeConfig("workload", "/", | ||
| makeWorkloadScrapeNodes( | ||
| c.Node(workloadNode).InstallNodes()[0], | ||
| []workloadInstance{{nodes: c.Node(workloadNode)}}, | ||
| ), | ||
| ), | ||
| ) | ||
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| if t.SkipInit() { | ||
| t.Status(fmt.Sprintf("running tpcc for %s (<%s)", workloadDuration, time.Minute)) | ||
| } else { | ||
| t.Status(fmt.Sprintf("initializing + running tpcc for %s (<%s)", workloadDuration, 10*time.Minute)) | ||
| } | ||
|
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| runTPCC(ctx, t, c, tpccOptions{ | ||
| Warehouses: numWarehouses, | ||
| Duration: workloadDuration, | ||
| SetupType: usingImport, | ||
| EstimatedSetupTime: estimatedSetupTime, | ||
| SkipPostRunCheck: true, | ||
| ExtraSetupArgs: "--checks=false", | ||
| PrometheusConfig: promCfg, | ||
| During: func(ctx context.Context) error { | ||
| db := c.Conn(ctx, t.L(), crdbNodes) | ||
| defer db.Close() | ||
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| t.Status(fmt.Sprintf("during: enabling admission control (<%s)", 30*time.Second)) | ||
| setAdmissionControl(ctx, t, c, true) | ||
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| m := c.NewMonitor(ctx, c.Range(1, crdbNodes)) | ||
| m.Go(func(ctx context.Context) error { | ||
| t.Status(fmt.Sprintf("during: creating full backup schedule to run every 20m (<%s)", time.Minute)) | ||
| _, err := db.ExecContext(ctx, | ||
| `CREATE SCHEDULE FOR BACKUP INTO $1 RECURRING '*/20 * * * *' FULL BACKUP ALWAYS WITH SCHEDULE OPTIONS ignore_existing_backups;`, | ||
| "gs://cockroachdb-backup-testing/"+c.Name()+"?AUTH=implicit", | ||
| ) | ||
| return err | ||
| }) | ||
| m.Wait() | ||
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| t.Status(fmt.Sprintf("during: waiting for workload to finish (<%s)", workloadDuration)) | ||
| return nil | ||
| }, | ||
| }) | ||
| }, | ||
| }) | ||
| } |
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