Tweak what's next

slides/k8s/whatsnext.md

@@ -136,77 +136,6 @@ And *then* it is time to look at orchestration!
 
 ---
 
-## HTTP traffic handling
-
-- *Services* are layer 4 constructs
-
-- HTTP is a layer 7 protocol
-
-- It is handled by *ingresses* (a different resource kind)
-
-- *Ingresses* allow:
-
-  - virtual host routing
-  - session stickiness
-  - URI mapping
-  - and much more!
-
-- [This section](kube-selfpaced.yml.html#toc-exposing-http-services-with-ingress-resources) shows how to expose multiple HTTP apps using [Træfik](https://docs.traefik.io/user-guide/kubernetes/)
-
----
-
-## Logging
-
-- Logging is delegated to the container engine
-
-- Logs are exposed through the API
-
-- Logs are also accessible through local files (`/var/log/containers`)
-
-- Log shipping to a central platform is usually done through these files
-
-  (e.g. with an agent bind-mounting the log directory)
-
-- [This section](kube-selfpaced.yml.html#toc-centralized-logging) shows how to do that with [Fluentd](https://docs.fluentd.org/v0.12/articles/kubernetes-fluentd) and the EFK stack
-
----
-
-## Metrics
-
-- The kubelet embeds [cAdvisor](https://github.com/google/cadvisor), which exposes container metrics
-
-  (cAdvisor might be separated in the future for more flexibility)
-
-- It is a good idea to start with [Prometheus](https://prometheus.io/)
-
-  (even if you end up using something else)
-
-- Starting from Kubernetes 1.8, we can use the [Metrics API](https://kubernetes.io/docs/tasks/debug-application-cluster/core-metrics-pipeline/)
-
-- [Heapster](https://github.com/kubernetes/heapster) was a popular add-on
-
-  (but is being [deprecated](https://github.com/kubernetes/heapster/blob/master/docs/deprecation.md) starting with Kubernetes 1.11)
-
----
-
-## Managing the configuration of our applications
-
-- Two constructs are particularly useful: secrets and config maps
-
-- They allow to expose arbitrary information to our containers
-
-- **Avoid** storing configuration in container images
-
-  (There are some exceptions to that rule, but it's generally a Bad Idea)
-
-- **Never** store sensitive information in container images
-
-  (It's the container equivalent of the password on a post-it note on your screen)
-
-- [This section](kube-selfpaced.yml.html#toc-managing-configuration) shows how to manage app config with config maps (among others)
-
----
-
 ## Managing stack deployments
 
 - The best deployment tool will vary, depending on: