package docker import ( "fmt" "github.com/containous/traefik/v2/pkg/config/label" ) const ( labelDockerComposeProject = "com.docker.compose.project" labelDockerComposeService = "com.docker.compose.service" ) // configuration Contains information from the labels that are globals (not related to the dynamic configuration) or specific to the provider. type configuration struct { Enable bool Docker specificConfiguration } type specificConfiguration struct { Network string LBSwarm bool } func (p *Provider) getConfiguration(container dockerData) (configuration, error) { conf := configuration{ Enable: p.ExposedByDefault, Docker: specificConfiguration{ Network: p.Network, }, } err := label.Decode(container.Labels, &conf, "traefik.docker.", "traefik.enable") if err != nil { return configuration{}, err } return conf, nil } // getStringMultipleStrict get multiple string values associated to several labels // Fail if one label is missing func getStringMultipleStrict(labels map[string]string, labelNames ...string) (map[string]string, error) { foundLabels := map[string]string{} for _, name := range labelNames { value := getStringValue(labels, name, "") // Error out only if one of them is not defined. if len(value) == 0 { return nil, fmt.Errorf("label not found: %s", name) } foundLabels[name] = value } return foundLabels, nil } // getStringValue get string value associated to a label func getStringValue(labels map[string]string, labelName string, defaultValue string) string { if value, ok := labels[labelName]; ok && len(value) > 0 { return value } return defaultValue }