Add staged apply e2e test (cert-manager)

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

.github/workflows/e2e.yaml

@@ -59,13 +59,15 @@ jobs:
           kubectl get crd tests.testing.kustomizer.dev 2>&1 | grep NotFound
       - name: Load test apply (110 objects)
         run: |
-          time ./bin/kustomizer apply -k ./testdata/loadtest/ --inventory-name load-test
+          ./bin/kustomizer apply -k ./testdata/loadtest/ --inventory-name load-test
       - name: Load test delete (110 objects)
         run: |
-          time ./bin/kustomizer delete --inventory-name load-test
+          ./bin/kustomizer delete --inventory-name load-test
+      - name: Test staged apply
+        run: |
+          ./bin/kustomizer apply -k ./testdata/certs/ --prune --wait --inventory-name cert-test --mode=ApplyAllStaged
+          kubectl -n kustomizer-cert-test wait issuers/my-ca-issuer --for=condition=ready --timeout=1m
       - name: Debug failure
         if: failure()
         run: |
-          kubectl version --client --short
           kubectl -n default get configmaps -oyaml
-          kubectl -n kustomizer-demo get all

testdata/certs/cert.yaml

@@ -0,0 +1,37 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: kustomizer-cert-test
+---
+apiVersion: cert-manager.io/v1
+kind: ClusterIssuer
+metadata:
+  name: selfsigned-issuer
+spec:
+  selfSigned: {}
+---
+apiVersion: cert-manager.io/v1
+kind: Certificate
+metadata:
+  name: my-selfsigned-ca
+  namespace: kustomizer-cert-test
+spec:
+  isCA: true
+  commonName: my-selfsigned-ca
+  secretName: root-secret
+  privateKey:
+    algorithm: ECDSA
+    size: 384
+  issuerRef:
+    name: selfsigned-issuer
+    kind: ClusterIssuer
+    group: cert-manager.io
+---
+apiVersion: cert-manager.io/v1
+kind: Issuer
+metadata:
+  name: my-ca-issuer
+  namespace: kustomizer-cert-test
+spec:
+  ca:
+    secretName: root-secret

testdata/certs/kustomization.yaml

@@ -0,0 +1,5 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+- https://github.com/jetstack/cert-manager/releases/download/v1.5.3/cert-manager.yaml
+- cert.yaml