enable configuring 'single-node' variant

ci-operator/jobs/openshift/installer/openshift-installer-master-presubmits.yaml

@@ -507,6 +507,89 @@ presubmits:
         secret:
           secretName: result-aggregator
     trigger: (?m)^/test( | .* )e2e-aws-shared-vpc,?($|\s.*)
+  - agent: kubernetes
+    always_run: false
+    branches:
+    - master
+    cluster: build02
+    context: ci/prow/e2e-aws-single-node
+    decorate: true
+    decoration_config:
+      skip_cloning: true
+    labels:
+      pj-rehearse.openshift.io/can-be-rehearsed: "true"
+    name: pull-ci-openshift-installer-master-e2e-aws-single-node
+    optional: true
+    rerun_command: /test e2e-aws-single-node
+    spec:
+      containers:
+      - args:
+        - --gcs-upload-secret=/secrets/gcs/service-account.json
+        - --image-import-pull-secret=/etc/pull-secret/.dockerconfigjson
+        - --lease-server-password-file=/etc/boskos/password
+        - --report-password-file=/etc/report/password.txt
+        - --report-username=ci
+        - --secret-dir=/usr/local/e2e-aws-single-node-cluster-profile
+        - --target=e2e-aws-single-node
+        - --template=/usr/local/e2e-aws-single-node
+        command:
+        - ci-operator
+        env:
+        - name: CLUSTER_TYPE
+          value: aws
+        - name: CLUSTER_VARIANT
+          value: single-node
+        - name: JOB_NAME_SAFE
+          value: e2e-aws-single-node
+        - name: TEST_COMMAND
+          value: TEST_SUITE=openshift/conformance/parallel run-tests
+        image: ci-operator:latest
+        imagePullPolicy: Always
+        name: ""
+        resources:
+          requests:
+            cpu: 10m
+        volumeMounts:
+        - mountPath: /etc/boskos
+          name: boskos
+          readOnly: true
+        - mountPath: /usr/local/e2e-aws-single-node-cluster-profile
+          name: cluster-profile
+        - mountPath: /secrets/gcs
+          name: gcs-credentials
+          readOnly: true
+        - mountPath: /usr/local/e2e-aws-single-node
+          name: job-definition
+          subPath: cluster-launch-installer-e2e.yaml
+        - mountPath: /etc/pull-secret
+          name: pull-secret
+          readOnly: true
+        - mountPath: /etc/report
+          name: result-aggregator
+          readOnly: true
+      serviceAccountName: ci-operator
+      volumes:
+      - name: boskos
+        secret:
+          items:
+          - key: password
+            path: password
+          secretName: boskos-credentials
+      - name: cluster-profile
+        projected:
+          sources:
+          - secret:
+              name: cluster-secrets-aws
+      - configMap:
+          name: prow-job-cluster-launch-installer-e2e
+        name: job-definition
+      - name: pull-secret
+        secret:
+          secretName: registry-pull-credentials
+      - name: result-aggregator
+        secret:
+          secretName: result-aggregator
+    trigger: (?m)^/test( | .* )e2e-aws-single-node,?($|\s.*)
   - agent: kubernetes
     always_run: false
     branches:

ci-operator/templates/openshift/installer/cluster-launch-installer-e2e.yaml

@@ -453,10 +453,16 @@ objects:
         mkdir -p ~/.ssh
         cp "${SSH_PRIV_KEY_PATH}" ~/.ssh/
 
+        masters=3
+        if has_variant "single-node" ;then
+          masters=1
+        fi
+
         workers=3
-        if has_variant "compact" || has_variant "multisocket"; then
+        if has_variant "compact" || has_variant "multisocket" || has_variant "single-node"; then
           workers=0
         fi
+
         if [[ "${CLUSTER_TYPE}" == "aws" ]]; then
             master_type=null
             if has_variant "multisocket"; then
@@ -508,7 +514,7 @@ objects:
           name: ${CLUSTER_NAME}
         controlPlane:
           name: master
-          replicas: 3
+          replicas: ${masters}
           platform:
             aws:
               type: ${master_type}

core-services/template-deprecation/_allowlist.yaml

@@ -736,6 +736,9 @@ templates:
         pull-ci-openshift-installer-master-e2e-aws-rhel8:
           generated: false
           kind: presubmit
+        pull-ci-openshift-installer-master-e2e-aws-single-node:
+          generated: false
+          kind: presubmit
         pull-ci-openshift-installer-release-4.4-e2e-aws-rhel8:
           generated: false
           kind: presubmit