Function FindContainersByLabels

pkg/dockerutil/containers.go:220–246

FindContainersByLabels takes a map of label names and values and returns any Docker containers which match all labels. Explanation of the query: * docs: https://docs.docker.com/engine/api/v1.23/ * Stack Overflow: https://stackoverflow.com/questions/28054203/docker-remote-api-filter-exited

(labels map[string]string)

// * docs: https://docs.docker.com/engine/api/v1.23/
// * Stack Overflow: https://stackoverflow.com/questions/28054203/docker-remote-api-filter-exited
func FindContainersByLabels(labels map[string]string) ([]container.Summary, error) {
	if len(labels) < 1 {
		return nil, fmt.Errorf("the provided list of labels was empty")
	}
	filterList := client.Filters{}
	for k, v := range labels {
		label := fmt.Sprintf("%s=%s", k, v)
		// If no value is specified, filter any value by the key.
		if v == "" {
			label = k
		}
		filterList = filterList.Add("label", label)
	}

	ctx, apiClient, err := GetDockerClient()
	if err != nil {
		return nil, err
	}
	containers, err := apiClient.ContainerList(ctx, client.ContainerListOptions{
		All:     true,
		Filters: filterList,
	})
	if err != nil {
		return nil, err
	}
	return containers.Items, nil
}

// FindContainersWithLabel returns all containers with the given label
// It ignores the value of the label, is only interested that the label exists.