mirror of
https://github.com/VictoriaMetrics/VictoriaMetrics.git
synced 2024-12-20 23:46:23 +01:00
d6415b2572
'any' type is supported starting from Go1.18. Let's consistently use it
instead of 'interface{}' type across the code base, since `any` is easier to read than 'interface{}'.
89 lines
2.3 KiB
Go
89 lines
2.3 KiB
Go
package dockerswarm
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import (
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"encoding/json"
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"fmt"
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"net/url"
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"strings"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/promscrape/discoveryutils"
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)
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var configMap = discoveryutils.NewConfigMap()
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type apiConfig struct {
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client *discoveryutils.Client
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port int
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// role is the type of objects to discover.
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//
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// filtersQueryArg is applied only to the given role - the rest of objects are queried without filters.
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role string
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// filtersQueryArg contains escaped `filters` query arg to add to each request to Docker Swarm API.
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filtersQueryArg string
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}
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func getAPIConfig(sdc *SDConfig, baseDir string) (*apiConfig, error) {
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v, err := configMap.Get(sdc, func() (any, error) { return newAPIConfig(sdc, baseDir) })
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if err != nil {
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return nil, err
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}
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return v.(*apiConfig), nil
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}
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func newAPIConfig(sdc *SDConfig, baseDir string) (*apiConfig, error) {
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cfg := &apiConfig{
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port: sdc.Port,
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filtersQueryArg: getFiltersQueryArg(sdc.Filters),
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}
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if cfg.port == 0 {
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cfg.port = 80
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}
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ac, err := sdc.HTTPClientConfig.NewConfig(baseDir)
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if err != nil {
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return nil, fmt.Errorf("cannot parse auth config: %w", err)
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}
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proxyAC, err := sdc.ProxyClientConfig.NewConfig(baseDir)
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if err != nil {
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return nil, fmt.Errorf("cannot parse proxy auth config: %w", err)
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}
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client, err := discoveryutils.NewClient(sdc.Host, ac, sdc.ProxyURL, proxyAC, &sdc.HTTPClientConfig)
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if err != nil {
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return nil, fmt.Errorf("cannot create HTTP client for %q: %w", sdc.Host, err)
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}
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cfg.client = client
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cfg.role = sdc.Role
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return cfg, nil
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}
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func (cfg *apiConfig) getAPIResponse(path, filtersQueryArg string) ([]byte, error) {
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if len(filtersQueryArg) > 0 {
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separator := "?"
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if strings.Contains(path, "?") {
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separator = "&"
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}
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path += separator + "filters=" + cfg.filtersQueryArg
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}
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return cfg.client.GetAPIResponse(path)
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}
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// Encodes filters as `map[string][]string` and then marshals it to JSON.
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// Reference: https://docs.docker.com/engine/api/v1.41/#tag/Task
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func getFiltersQueryArg(filters []Filter) string {
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if len(filters) == 0 {
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return ""
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}
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m := make(map[string][]string)
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for _, f := range filters {
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m[f.Name] = f.Values
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}
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buf, err := json.Marshal(m)
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if err != nil {
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logger.Panicf("BUG: unexpected error in json.Marshal: %s", err)
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}
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return url.QueryEscape(string(buf))
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}
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