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
},
}
}
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
},
}
}