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// SPDX-License-Identifier: GPL-3.0-or-later
package prometheus
import (
"errors"
"fmt"
"os"
"github.com/netdata/netdata/go/go.d.plugin/pkg/matcher"
"github.com/netdata/netdata/go/go.d.plugin/pkg/prometheus"
"github.com/netdata/netdata/go/go.d.plugin/pkg/web"
)
func (p *Prometheus) validateConfig() error {
if p.URL == "" {
return errors.New("'url' can not be empty")
}
return nil
}
func (p *Prometheus) initPrometheusClient() (prometheus.Prometheus, error) {
httpClient, err := web.NewHTTPClient(p.Client)
if err != nil {
return nil, fmt.Errorf("init HTTP client: %v", err)
}
req := p.Request.Copy()
if p.BearerTokenFile != "" {
token, err := os.ReadFile(p.BearerTokenFile)
if err != nil {
return nil, fmt.Errorf("bearer token file: %v", err)
}
req.Headers["Authorization"] = "Bearer " + string(token)
}
sr, err := p.Selector.Parse()
if err != nil {
return nil, fmt.Errorf("parsing selector: %v", err)
}
if sr != nil {
return prometheus.NewWithSelector(httpClient, req, sr), nil
}
return prometheus.New(httpClient, req), nil
}
func (p *Prometheus) initFallbackTypeMatcher(expr []string) (matcher.Matcher, error) {
if len(expr) == 0 {
return nil, nil
}
m := matcher.FALSE()
for _, pattern := range expr {
v, err := matcher.NewGlobMatcher(pattern)
if err != nil {
return nil, fmt.Errorf("error on parsing pattern '%s': %v", pattern, err)
}
m = matcher.Or(m, v)
}
return m, nil
}
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