Example #1
0
func (r *Releaser) releaseActionFindPodController(service flux.ServiceID) ReleaseAction {
	return ReleaseAction{
		Description: fmt.Sprintf("Load the resource definition file for service %s", service),
		Do: func(rc *ReleaseContext) (res string, err error) {
			defer func(begin time.Time) {
				r.metrics.ActionDuration.With(
					"action", "find_pod_controller",
					"success", fmt.Sprint(err == nil),
				).Observe(time.Since(begin).Seconds())
			}(time.Now())

			resourcePath := rc.ConfigPath()
			if fi, err := os.Stat(resourcePath); err != nil || !fi.IsDir() {
				return "", fmt.Errorf("the resource path (%s) is not valid", resourcePath)
			}

			namespace, serviceName := service.Components()
			files, err := kubernetes.FilesFor(resourcePath, namespace, serviceName)

			if err != nil {
				return "", errors.Wrapf(err, "finding resource definition file for %s", service)
			}
			if len(files) <= 0 { // fine; we'll just skip it
				return fmt.Sprintf("no resource definition file found for %s; skipping", service), nil
			}
			if len(files) > 1 {
				return "", fmt.Errorf("multiple resource definition files found for %s: %s", service, strings.Join(files, ", "))
			}

			def, err := ioutil.ReadFile(files[0]) // TODO(mb) not multi-doc safe
			if err != nil {
				return "", err
			}
			rc.PodControllers[service] = def
			return "Found pod controller OK.", nil
		},
	}
}
Example #2
0
func (r *Releaser) releaseActionUpdatePodController(service flux.ServiceID, regrades []containerRegrade) ReleaseAction {
	var actions []string
	for _, regrade := range regrades {
		actions = append(actions, fmt.Sprintf("%s (%s -> %s)", regrade.container, regrade.current, regrade.target))
	}
	actionList := strings.Join(actions, ", ")

	return ReleaseAction{
		Description: fmt.Sprintf("Update %d images(s) in the resource definition file for %s: %s.", len(regrades), service, actionList),
		Do: func(rc *ReleaseContext) (res string, err error) {
			defer func(begin time.Time) {
				r.metrics.ActionDuration.With(
					"action", "update_pod_controller",
					"success", fmt.Sprint(err == nil),
				).Observe(time.Since(begin).Seconds())
			}(time.Now())

			resourcePath := rc.ConfigPath()
			if fi, err := os.Stat(resourcePath); err != nil || !fi.IsDir() {
				return "", fmt.Errorf("the resource path (%s) is not valid", resourcePath)
			}

			namespace, serviceName := service.Components()
			files, err := kubernetes.FilesFor(resourcePath, namespace, serviceName)
			if err != nil {
				return "", errors.Wrapf(err, "finding resource definition file for %s", service)
			}
			if len(files) <= 0 {
				return fmt.Sprintf("no resource definition file found for %s; skipping", service), nil
			}
			if len(files) > 1 {
				return "", fmt.Errorf("multiple resource definition files found for %s: %s", service, strings.Join(files, ", "))
			}

			def, err := ioutil.ReadFile(files[0])
			if err != nil {
				return "", err
			}
			fi, err := os.Stat(files[0])
			if err != nil {
				return "", err
			}

			for _, regrade := range regrades {
				// Note 1: UpdatePodController parses the target (new) image
				// name, extracts the repository, and only mutates the line(s)
				// in the definition that match it. So for the time being we
				// ignore the current image. UpdatePodController could be
				// updated, if necessary.
				//
				// Note 2: we keep overwriting the same def, to handle multiple
				// images in a single file.
				def, err = kubernetes.UpdatePodController(def, string(regrade.target), ioutil.Discard)
				if err != nil {
					return "", errors.Wrapf(err, "updating pod controller for %s", regrade.target)
				}
			}

			// Write the file back, so commit/push works.
			if err := ioutil.WriteFile(files[0], def, fi.Mode()); err != nil {
				return "", err
			}

			// Put the def in the map, so release works.
			rc.PodControllers[service] = def
			return "Update pod controller OK.", nil
		},
	}
}