Add daily e2e job for refreshing the cache (#19)

To refresh the cache we need to checkout ramen source and run drenv cache with
the environment files. Using a workflow for this make this job easy to implement
and manage without accessing the runner directly.

The job can also run manually from github UI. This is likely to work for people
with write access.

Signed-off-by: Sheetal Pamecha <[email protected]>

.github/workflows/e2e-daily.yaml

@@ -0,0 +1,36 @@
+# SPDX-FileCopyrightText: The RamenDR authors
+# SPDX-License-Identifier: Apache-2.0
+
+---
+# yamllint disable rule:line-length
+name: E2E Daily
+
+on:  # yamllint disable-line rule:truthy
+  # Run every day on 03:00.
+  schedule:
+    - cron: '0 3 * * *'
+  # Allow manual run.
+  # (Actions -> E2E Daily -> Run workflow)
+  workflow_dispatch:
+
+jobs:
+  refresh-cache:
+    runs-on: [self-hosted, e2e-rdr]
+    if: github.repository == 'RamenDR/ramen'
+
+    steps:
+      - name: Checkout Repo
+        uses: actions/checkout@v4
+
+      - name: Install drenv
+        run: pip install -e test
+
+      - name: Refresh cache
+        uses: nick-fields/retry@v3
+        with:
+          timeout_minutes: 2
+          retry_wait_seconds: 60
+          max_attempts: 10
+          command: |
+            cd test
+            drenv cache -v envs/regional-dr.yaml