| 1 | // SPDX-License-Identifier: GPL-3.0-or-later |
| 2 | |
| 3 | package prometheus |
| 4 | |
| 5 | import ( |
| 6 | "errors" |
| 7 | "fmt" |
| 8 | |
| 9 | "github.com/netdata/netdata/go/plugins/pkg/matcher" |
| 10 | "github.com/netdata/netdata/go/plugins/pkg/prometheus" |
| 11 | "github.com/netdata/netdata/go/plugins/pkg/web" |
| 12 | ) |
| 13 | |
| 14 | func (c *Collector) validateConfig() error { |
| 15 | if c.URL == "" { |
| 16 | return errors.New("'url' can not be empty") |
| 17 | } |
| 18 | return nil |
| 19 | } |
| 20 | |
| 21 | func (c *Collector) initPrometheusClient() (prometheus.Prometheus, error) { |
| 22 | httpClient, err := web.NewHTTPClient(c.ClientConfig) |
| 23 | if err != nil { |
| 24 | return nil, fmt.Errorf("init HTTP client: %v", err) |
| 25 | } |
| 26 | |
| 27 | req := c.RequestConfig.Copy() |
| 28 | |
| 29 | sr, err := c.Selector.Parse() |
| 30 | if err != nil { |
| 31 | return nil, fmt.Errorf("parsing selector: %v", err) |
| 32 | } |
| 33 | |
| 34 | if sr != nil { |
| 35 | return prometheus.NewWithSelector(httpClient, req, sr), nil |
| 36 | } |
| 37 | return prometheus.New(httpClient, req), nil |
| 38 | } |
| 39 | |
| 40 | func (c *Collector) initFallbackTypeMatcher(expr []string) (matcher.Matcher, error) { |
| 41 | if len(expr) == 0 { |
| 42 | return matcher.FALSE(), nil |
| 43 | } |
| 44 | |
| 45 | m := matcher.FALSE() |
| 46 | |
| 47 | for _, pattern := range expr { |
| 48 | v, err := matcher.NewGlobMatcher(pattern) |
| 49 | if err != nil { |
| 50 | return nil, fmt.Errorf("error on parsing pattern '%s': %v", pattern, err) |
| 51 | } |
| 52 | m = matcher.Or(m, v) |
| 53 | } |
| 54 | |
| 55 | return m, nil |
| 56 | } |