64 lines
1.6 KiB
Go
64 lines
1.6 KiB
Go
package docker
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import (
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"fmt"
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"github.com/traefik/traefik/v3/pkg/config/label"
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)
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const (
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labelDockerComposeProject = "com.docker.compose.project"
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labelDockerComposeService = "com.docker.compose.service"
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)
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// configuration Contains information from the labels that are globals (not related to the dynamic configuration)
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// or specific to the provider.
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type configuration struct {
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Enable bool
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Docker specificConfiguration
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}
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type specificConfiguration struct {
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Network string
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LBSwarm bool
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}
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func (p *Shared) extractLabels(container dockerData) (configuration, error) {
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conf := configuration{
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Enable: p.ExposedByDefault,
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Docker: specificConfiguration{
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Network: p.Network,
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},
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}
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err := label.Decode(container.Labels, &conf, "traefik.docker.", "traefik.enable")
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if err != nil {
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return configuration{}, err
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}
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return conf, nil
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}
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// getStringMultipleStrict get multiple string values associated to several labels.
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// Fail if one label is missing.
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func getStringMultipleStrict(labels map[string]string, labelNames ...string) (map[string]string, error) {
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foundLabels := map[string]string{}
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for _, name := range labelNames {
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value := getStringValue(labels, name, "")
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// Error out only if one of them is not defined.
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if len(value) == 0 {
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return nil, fmt.Errorf("label not found: %s", name)
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}
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foundLabels[name] = value
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}
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return foundLabels, nil
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}
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// getStringValue get string value associated to a label.
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func getStringValue(labels map[string]string, labelName, defaultValue string) string {
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if value, ok := labels[labelName]; ok && len(value) > 0 {
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return value
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}
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return defaultValue
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}
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