Improving e2e reliability

Fixed access to nil pointer, which was polluting error messages.
Increased memory for fedora vagrant as kubectl rollout is getting stuck at times, and may be related to:
https://kubernetes.io/docs/tasks/manage-daemon/update-daemon-set/\#some-nodes-run-out-of-resources

.github/workflows/test.yml

@@ -68,7 +68,9 @@ jobs:
       - name: Boot Virtual Machine
         run: make vagrant-up-fedora
       - name: Show environment information
-        run: $RUN kubectl get nodes -o wide
+        run: |
+          $RUN kubectl wait --for=condition=ready --timeout=60s node 127.0.0.1
+          $RUN kubectl get nodes -o wide
       - name: Run E2E tests
         run: $RUN hack/ci/e2e-fedora.sh
 
@@ -93,6 +95,8 @@ jobs:
       - name: Boot Virtual Machine
         run: make vagrant-up-ubuntu
       - name: Show environment information
-        run: $RUN kubectl get nodes -o wide
+        run: |
+          $RUN kubectl wait --for=condition=ready --timeout=60s node ubuntu-focal
+          $RUN kubectl get nodes -o wide
       - name: Run E2E tests
         run: $RUN hack/ci/e2e-ubuntu.sh

hack/ci/Vagrantfile-fedora

@@ -4,7 +4,7 @@
 # Vagrant box for testing
 Vagrant.configure("2") do |config|
   config.vm.box = "fedora/35-cloud-base"
-  memory = 6144
+  memory = 8192
   cpus = 4
 
   config.vm.provider :virtualbox do |v|

test/suite_test.go

@@ -423,7 +423,10 @@ func (e *e2e) setWorkDir() string {
 func (e *e2e) run(cmd string, args ...string) string {
 	output, err := command.New(cmd, args...).RunSuccessOutput()
 	e.Nil(err)
-	return output.OutputTrimNL()
+	if output != nil {
+		return output.OutputTrimNL()
+	}
+	return ""
 }
 
 func (e *e2e) runFailure(cmd string, args ...string) string {