change CI to use terraform role

Author: sjpb

.github/workflows/stackhpc.yml

@@ -14,7 +14,7 @@ jobs:
     env:
       ANSIBLE_FORCE_COLOR: True
       OS_CLOUD: openstack
-      TF_VAR_cluster_name: ci${{ github.run_id }}
+      CI_CLUSTER_NAME: ci${{ github.run_id }}
       CI_CLOUD: ${{ vars.CI_CLOUD }}
     steps:
       - uses: actions/checkout@v2
@@ -43,10 +43,6 @@ jobs:
         with:
           terraform: v1.5.5
 
-      - name: Initialise terraform
-        run: terraform init
-        working-directory: ${{ github.workspace }}/environments/.stackhpc/terraform
-        
       - name: Write clouds.yaml
         run: |
           mkdir -p ~/.config/openstack/
@@ -67,8 +63,7 @@ jobs:
         run: |
           . venv/bin/activate
           . environments/.stackhpc/activate
-          cd $APPLIANCES_ENVIRONMENT_ROOT/terraform
-          terraform apply -auto-approve -var-file="${{ vars.CI_CLOUD }}.tfvars"
+          ansible-playbook -v ansible/infra.yml -e terraform_autoapprove=true
 
       - name: Delete infrastructure if provisioning failed
         run: |