Container opt-in

README.md

@@ -68,6 +68,10 @@ $ docker run -v /var/run/docker.sock:/var/run/docker.sock:ro --rm -ti camptocamp
 
 You can set containers to only warn if they are outdated by placing an `io.upkick.warn_only=true` label on them.
 
+## Per container opt-in
+
+If the global `--warn-only` flag is passed, you can opt-in for container kicking by placing an `io.upkick.warn_only=false` label on them.
+
 
 ## Metrics
 

handler/handler.go

@@ -167,7 +167,15 @@ func (u *Upkick) Kick(i *image.Image) (err error) {
 		}
 
 		for _, c := range hashS.Containers {
-			if u.Config.Warn {
+			cont, err := u.Client.ContainerInspect(context.Background(), c)
+			if err != nil {
+				log.Errorf("failed to inspect container %s: %v", c, err)
+				continue
+			}
+
+			warnOnly, warnLabel := cont.Config.Labels["io.upkick.warn_only"]
+
+			if u.Config.Warn && !(warnLabel && warnOnly == "false") {
 				log.Warnf("Container %s uses an out-of-date image", c)
 				outWarn++
 				continue