Switches CI workflow to use OCI runner

.cirun.yml

@@ -0,0 +1,15 @@
+# Self-Hosted Github Action Runners on Oracle Cloud via Cirun.io
+# Reference: https://docs.cirun.io/reference/yaml
+runners:
+  - name: "oci-cncf-runner"
+    cloud: "oracle"
+    # https://docs.oracle.com/en-us/iaas/Content/Compute/References/computeshapes.htm#vm-standard
+    instance_type: "VM.Standard.E4.Flex"
+    # https://docs.oracle.com/en-us/iaas/images/
+    machine_image: "ocid1.image.oc1.us-sanjose-1.aaaaaaaavslpj7yhhuswzti6cucy2qofpb3vbijj4tw5q53d7j3dwpnxj7ta"
+    # https://docs.oracle.com/en-us/iaas/Content/General/Concepts/regions.htm
+    region: "us-sanjose-1"
+    # Add this label in the "runs-on" param in .github/workflows/<workflow-name>.yml
+    # So that this runner is created for running the workflow
+    labels:
+      - "oci-cncf-runner"

.github/workflows/ci.yml

@@ -25,8 +25,8 @@ env:
   AWS_USR: ${{ secrets.AWS_USR }}
 
 jobs:
-  detect-noop:
-    runs-on: ubuntu-20.04
+  detect-noop:    
+    runs-on: "oci-cncf-runner--${{ github.run_id }}"
     outputs:
       noop: ${{ steps.noop.outputs.should_skip }}
     steps:
@@ -40,7 +40,7 @@ jobs:
           concurrent_skipping: false
 
   lint:
-    runs-on: ubuntu-20.04
+    runs-on: "oci-cncf-runner--${{ github.run_id }}"
     needs: detect-noop
     if: needs.detect-noop.outputs.noop != 'true'
 
@@ -89,7 +89,7 @@ jobs:
           version: ${{ env.GOLANGCI_VERSION }}
 
   check-diff:
-    runs-on: ubuntu-20.04
+    runs-on: "oci-cncf-runner--${{ github.run_id }}"
     needs: detect-noop
     if: needs.detect-noop.outputs.noop != 'true'
 
@@ -131,7 +131,7 @@ jobs:
         run: make check-diff
 
   unit-tests:
-    runs-on: ubuntu-20.04
+    runs-on: "oci-cncf-runner--${{ github.run_id }}"
     needs: detect-noop
     if: needs.detect-noop.outputs.noop != 'true'