Include Go plugin sources in main repository. (#16997)

* Include Go plugin sources in main repository.

* Fix CI issues.

* Rename source tree.

1 files changed, 127 insertions, 0 deletions

diff --git a/src/go/collectors/go.d.plugin/modules/prometheus/prometheus.go b/src/go/collectors/go.d.plugin/modules/prometheus/prometheus.go
new file mode 100644
index 0000000000..32a91e5c25
--- /dev/null
+++ b/src/go/collectors/go.d.plugin/modules/prometheus/prometheus.go
@@ -0,0 +1,127 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package prometheus
+
+import (
+	_ "embed"
+	"time"
+
+	"github.com/netdata/go.d.plugin/agent/module"
+	"github.com/netdata/go.d.plugin/pkg/matcher"
+	"github.com/netdata/go.d.plugin/pkg/prometheus"
+	"github.com/netdata/go.d.plugin/pkg/prometheus/selector"
+	"github.com/netdata/go.d.plugin/pkg/web"
+)
+
+//go:embed "config_schema.json"
+var configSchema string
+
+func init() {
+	module.Register("prometheus", module.Creator{
+		JobConfigSchema: configSchema,
+		Defaults: module.Defaults{
+			UpdateEvery: 10,
+		},
+		Create: func() module.Module { return New() },
+	})
+}
+
+func New() *Prometheus {
+	return &Prometheus{
+		Config: Config{
+			HTTP: web.HTTP{
+				Client: web.Client{
+					Timeout: web.Duration{Duration: time.Second * 10},
+				},
+			},
+			MaxTS:          2000,
+			MaxTSPerMetric: 200,
+		},
+		charts: &module.Charts{},
+		cache:  newCache(),
+	}
+}
+
+type Config struct {
+	web.HTTP        `yaml:",inline"`
+	Name            string `yaml:"name"`
+	Application     string `yaml:"app"`
+	BearerTokenFile string `yaml:"bearer_token_file"`
+
+	Selector selector.Expr `yaml:"selector"`
+
+	ExpectedPrefix string `yaml:"expected_prefix"`
+	MaxTS          int    `yaml:"max_time_series"`
+	MaxTSPerMetric int    `yaml:"max_time_series_per_metric"`
+	FallbackType   struct {
+		Counter []string `yaml:"counter"`
+		Gauge   []string `yaml:"gauge"`
+	} `yaml:"fallback_type"`
+}
+
+type Prometheus struct {
+	module.Base
+	Config `yaml:",inline"`
+
+	charts *module.Charts
+
+	prom  prometheus.Prometheus
+	cache *cache
+
+	fallbackType struct {
+		counter matcher.Matcher
+		gauge   matcher.Matcher
+	}
+}
+
+func (p *Prometheus) Init() bool {
+	if err := p.validateConfig(); err != nil {
+		p.Errorf("validating config: %v", err)
+		return false
+	}
+
+	prom, err := p.initPrometheusClient()
+	if err != nil {
+		p.Errorf("init prometheus client: %v", err)
+		return false
+	}
+	p.prom = prom
+
+	m, err := p.initFallbackTypeMatcher(p.FallbackType.Counter)
+	if err != nil {
+		p.Errorf("init counter fallback type matcher: %v", err)
+		return false
+	}
+	p.fallbackType.counter = m
+
+	m, err = p.initFallbackTypeMatcher(p.FallbackType.Gauge)
+	if err != nil {
+		p.Errorf("init counter fallback type matcher: %v", err)
+		return false
+	}
+	p.fallbackType.gauge = m
+
+	return true
+}
+
+func (p *Prometheus) Check() bool {
+	return len(p.Collect()) > 0
+}
+
+func (p *Prometheus) Charts() *module.Charts {
+	return p.charts
+}
+
+func (p *Prometheus) Collect() map[string]int64 {
+	mx, err := p.collect()
+	if err != nil {
+		p.Error(err)
+	}
+
+	if len(mx) == 0 {
+		return nil
+	}
+	return mx
+}
+
+func (p *Prometheus) Cleanup() {}