Set shell options for reliability.

Tweak a few other small things in our shell scripts.

hack/e2e-test.sh

@@ -17,6 +17,10 @@
 # Starts a Kubernetes cluster, runs the e2e test suite, and shuts it
 # down.
 
+set -o errexit
+set -o nounset
+set -o pipefail
+
 # Use testing config
 export KUBE_CONFIG_FILE="config-test.sh"
 KUBE_ROOT=$(dirname "${BASH_SOURCE}")/..
@@ -34,9 +38,6 @@ ALREADY_UP=${1:-0}
 LEAVE_UP=${2:-0}
 TEAR_DOWN=${3:-0}
 
-# Exit on error
-set -e
-
 if [[ $TEAR_DOWN -ne 0 ]]; then
   detect-project
   trap test-teardown EXIT