Merge branch 'improve-core-apr-2019' into pycon2019

slides/k8s/daemonset.md

@@ -73,18 +73,13 @@
 
 - Dump the `rng` resource in YAML:
   ```bash
-  kubectl get deploy/rng -o yaml --export >rng.yml 
+  kubectl get deploy/rng -o yaml >rng.yml
   ```
 
 - Edit `rng.yml`
 
 ]
 
-Note: `--export` will remove "cluster-specific" information, i.e.:
-- namespace (so that the resource is not tied to a specific namespace)
-- status and creation timestamp (useless when creating a new resource)
-- resourceVersion and uid (these would cause... *interesting* problems)
-
 ---
 
 ## "Casting" a resource to another

slides/k8s/ourapponkube.md

@@ -11,6 +11,7 @@
 
 - Deploy everything else:
   ```bash
+    set -u
     for SERVICE in hasher rng webui worker; do
       kubectl create deployment $SERVICE --image=$REGISTRY/$SERVICE:$TAG
     done