| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package prometheus |
| 4 | |
| 5 | import ( |
| 6 | "context" |
| 7 | _ "embed" |
| 8 | "fmt" |
| 9 | "time" |
| 10 | |
| 11 | "github.com/netdata/netdata/go/plugins/pkg/confopt" |
| 12 | "github.com/netdata/netdata/go/plugins/pkg/metrix" |
| 13 | "github.com/netdata/netdata/go/plugins/pkg/prometheus" |
| 14 | "github.com/netdata/netdata/go/plugins/pkg/prometheus/selector" |
| 15 | "github.com/netdata/netdata/go/plugins/pkg/web" |
| 16 | "github.com/netdata/netdata/go/plugins/plugin/framework/collectorapi" |
| 17 | "github.com/netdata/netdata/go/plugins/plugin/go.d/collector/prometheus/relabel" |
| 18 | ) |
| 19 | |
| 20 | //go:embed "config_schema.json" |
| 21 | var configSchema string |
| 22 | |
| 23 | func init() { |
| 24 | collectorapi.Register("prometheus", collectorapi.Creator{ |
| 25 | JobConfigSchema: configSchema, |
| 26 | Defaults: collectorapi.Defaults{ |
| 27 | UpdateEvery: 10, |
| 28 | }, |
| 29 | CreateV2: func() collectorapi.CollectorV2 { return New() }, |
| 30 | Config: func() any { return &Config{} }, |
| 31 | }) |
| 32 | } |
| 33 | |
| 34 | func New() *Collector { |
| 35 | return &Collector{ |
| 36 | Config: Config{ |
| 37 | HTTPConfig: web.HTTPConfig{ |
| 38 | ClientConfig: web.ClientConfig{ |
| 39 | Timeout: confopt.Duration(time.Second * 10), |
| 40 | }, |
| 41 | }, |
| 42 | MaxTS: 2000, |
| 43 | MaxTSPerMetric: 200, |
| 44 | }, |
| 45 | store: metrix.NewCollectorStore(), |
| 46 | } |
| 47 | } |
| 48 | |
| 49 | type Config struct { |
| 50 | Vnode string `yaml:"vnode,omitempty" json:"vnode"` |
| 51 | UpdateEvery int `yaml:"update_every,omitempty" json:"update_every"` |
| 52 | AutoDetectionRetry int `yaml:"autodetection_retry,omitempty" json:"autodetection_retry"` |
| 53 | web.HTTPConfig `yaml:",inline" json:""` |
| 54 | Name string `yaml:"name,omitempty" json:"name"` |
| 55 | Application string `yaml:"app,omitempty" json:"app"` |
| 56 | LabelPrefix string `yaml:"label_prefix,omitempty" json:"label_prefix"` |
| 57 | Selector selector.Expr `yaml:"selector,omitempty" json:"selector"` |
| 58 | ExpectedPrefix string `yaml:"expected_prefix,omitempty" json:"expected_prefix"` |
| 59 | MaxTS int `yaml:"max_time_series" json:"max_time_series"` |
| 60 | MaxTSPerMetric int `yaml:"max_time_series_per_metric" json:"max_time_series_per_metric"` |
| 61 | FallbackType struct { |
| 62 | Gauge []string `yaml:"gauge,omitempty" json:"gauge"` |
| 63 | Counter []string `yaml:"counter,omitempty" json:"counter"` |
| 64 | } `yaml:"fallback_type,omitempty" json:"fallback_type"` |
| 65 | } |
| 66 | |
| 67 | type Collector struct { |
| 68 | collectorapi.Base |
| 69 | Config `yaml:",inline" json:""` |
| 70 | |
| 71 | prom prometheus.Prometheus |
| 72 | relabelConfigs []relabel.Config |
| 73 | relabelTransform prometheus.SampleTransform |
| 74 | store metrix.CollectorStore |
| 75 | writer *metricFamilyWriter |
| 76 | chartTemplate string |
| 77 | } |
| 78 | |
| 79 | func (c *Collector) Configuration() any { |
| 80 | return c.Config |
| 81 | } |
| 82 | |
| 83 | func (c *Collector) Init(context.Context) error { |
| 84 | if err := c.validateConfig(); err != nil { |
| 85 | return fmt.Errorf("validating config: %v", err) |
| 86 | } |
| 87 | |
| 88 | prom, err := c.initPrometheusClient() |
| 89 | if err != nil { |
| 90 | return fmt.Errorf("init prometheus client: %v", err) |
| 91 | } |
| 92 | c.prom = prom |
| 93 | |
| 94 | // relabelConfigs are empty in this PR (rules are set by tests; profiles populate |
| 95 | // them later), so NewTransform returns a nil transform and Scrape keeps its |
| 96 | // no-transform fast path. A non-empty, invalid rule set fails Init here. |
| 97 | transform, err := relabel.NewTransform(c.relabelConfigs, c.onRelabelDrop) |
| 98 | if err != nil { |
| 99 | return fmt.Errorf("init relabel: %v", err) |
| 100 | } |
| 101 | c.relabelTransform = transform |
| 102 | |
| 103 | gaugeFallback, err := c.initFallbackTypeMatcher(c.FallbackType.Gauge) |
| 104 | if err != nil { |
| 105 | return fmt.Errorf("init gauge fallback type matcher: %v", err) |
| 106 | } |
| 107 | counterFallback, err := c.initFallbackTypeMatcher(c.FallbackType.Counter) |
| 108 | if err != nil { |
| 109 | return fmt.Errorf("init counter fallback type matcher: %v", err) |
| 110 | } |
| 111 | |
| 112 | c.writer = newMetricFamilyWriter(c.store, metricFamilyWriterPolicy{ |
| 113 | labelPrefix: c.LabelPrefix, |
| 114 | maxTSPerMetric: c.MaxTSPerMetric, |
| 115 | isFallbackTypeGauge: gaugeFallback, |
| 116 | isFallbackTypeCounter: counterFallback, |
| 117 | }, c.Logger) |
| 118 | |
| 119 | tmpl, err := buildChartTemplate(c.application()) |
| 120 | if err != nil { |
| 121 | return fmt.Errorf("build chart template: %v", err) |
| 122 | } |
| 123 | c.chartTemplate = tmpl |
| 124 | |
| 125 | return nil |
| 126 | } |
| 127 | |
| 128 | func (c *Collector) Check(ctx context.Context) error { |
| 129 | return c.check(ctx) |
| 130 | } |
| 131 | |
| 132 | func (c *Collector) Collect(ctx context.Context) error { |
| 133 | return c.collect(ctx) |
| 134 | } |
| 135 | |
| 136 | func (c *Collector) Cleanup(context.Context) { |
| 137 | if c.prom != nil && c.prom.HTTPClient() != nil { |
| 138 | c.prom.HTTPClient().CloseIdleConnections() |
| 139 | } |
| 140 | } |
| 141 | |
| 142 | func (c *Collector) MetricStore() metrix.CollectorStore { |
| 143 | return c.store |
| 144 | } |
| 145 | |
| 146 | func (c *Collector) ChartTemplateYAML() string { |
| 147 | return c.chartTemplate |
| 148 | } |