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PMM-12463 Add telemetry envvar datasource (percona#2532)
* PMM-12463 allow ireturn on DataSources * PMM-12463 fix some command hints * PMM-12463 add ENV_VAR dataSource * PMM-12463 add a provisionary envvar metrics extraction * PMM-12463 add a test for EnvVar datasource * PMM-12463 revert staticckeck linter * PMM-12463 fix linter warnings * PMM-12463 revert changes to main.go * PMM-12463 refactor the output format * PMM-12463 add a transform to strip values * PMM-12463 fix linter warnings * PMM-12463 refactor transform, add tests * PMM-12463 run format * PMM-12463 follow up on review comments * PMM-12185 remove the debug statement * PMM-12185 don't be too noisy when a ds is not initialized
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| // Copyright (C) 2023 Percona LLC | ||
| // | ||
| // This program is free software: you can redistribute it and/or modify | ||
| // it under the terms of the GNU Affero General Public License as published by | ||
| // the Free Software Foundation, either version 3 of the License, or | ||
| // (at your option) any later version. | ||
| // | ||
| // This program is distributed in the hope that it will be useful, | ||
| // but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| // GNU Affero General Public License for more details. | ||
| // | ||
| // You should have received a copy of the GNU Affero General Public License | ||
| // along with this program. If not, see <https://www.gnu.org/licenses/>. | ||
|
|
||
| // Package telemetry provides telemetry functionality. | ||
| package telemetry | ||
|
|
||
| import ( | ||
| "context" | ||
| "os" | ||
|
|
||
| pmmv1 "github.com/percona-platform/saas/gen/telemetry/events/pmm" | ||
| "github.com/sirupsen/logrus" | ||
| ) | ||
|
|
||
| type dsEnvvars struct { | ||
| l *logrus.Entry | ||
| config DSConfigEnvVars | ||
| } | ||
|
|
||
| // check interfaces. | ||
| var ( | ||
| _ DataSource = (*dsEnvvars)(nil) | ||
| ) | ||
|
|
||
| // NewDataSourceEnvVars makes a new data source for collecting envvars. | ||
| func NewDataSourceEnvVars(config DSConfigEnvVars, l *logrus.Entry) DataSource { | ||
| return &dsEnvvars{ | ||
| l: l, | ||
| config: config, | ||
| } | ||
| } | ||
|
|
||
| // Enabled flag that determines if data source is enabled. | ||
| func (d *dsEnvvars) Enabled() bool { | ||
| return d.config.Enabled | ||
| } | ||
|
|
||
| func (d *dsEnvvars) Init(_ context.Context) error { | ||
| return nil | ||
| } | ||
|
|
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| func (d *dsEnvvars) FetchMetrics(_ context.Context, config Config) ([]*pmmv1.ServerMetric_Metric, error) { | ||
| var metrics []*pmmv1.ServerMetric_Metric | ||
|
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| check := make(map[string]bool, len(config.Data)) | ||
|
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| for _, col := range config.Data { | ||
| if col.Column == "" { | ||
| d.l.Warnf("no column defined or empty column name in config %s", config.ID) | ||
| continue | ||
| } | ||
| if value, ok := os.LookupEnv(col.Column); ok && value != "" { | ||
| if _, alreadyHasItem := check[col.MetricName]; alreadyHasItem { | ||
| d.l.Warnf("repeated metric key %s found in config %s, the last will win", col.MetricName, config.ID) | ||
| continue | ||
| } | ||
|
|
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| check[col.MetricName] = true | ||
|
|
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| metrics = append(metrics, &pmmv1.ServerMetric_Metric{ | ||
| Key: col.MetricName, | ||
| Value: value, | ||
| }) | ||
| } | ||
| } | ||
|
|
||
| return metrics, nil | ||
| } | ||
|
|
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| func (d *dsEnvvars) Dispose(_ context.Context) error { | ||
| return nil | ||
| } |
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