CI: move to self-hosted GitHub ARC infrastructure

We are now running the self-hosted testing infrastructure with the help
of GitHub's ARC. This allows us to be more considerate with the
available resources as the VMs are now spawned on demand with the
requested kernel.

For now, we have to print KERNEL_VERSION in a previous job to pick up
the correct kernel. This should be fixed in the future by contributing a
labeling mechanism to GitHub's ARC.

Signed-off-by: Dennis Maisenbacher <[email protected]>

Author: MaisenbacherD

.github/workflows/run-nightly-tests.yml

@@ -7,15 +7,28 @@ on:
     - cron: '0 01 * * *'
 
 jobs:
+  request-kernel-version:
+    if: github.repository == 'linux-nvme/nvme-cli'
+    runs-on: ubuntu-latest
+    steps:
+      #We don't have to build the kernel here, as we have a cron job running on
+      #the k8s cluster that builds this target nightly.
+      - name: Request nightly Linus' master tree kernel build for the next job
+        run: |
+          echo "KERNEL_VERSION=linus-master" >> $GITHUB_ENV
+      - name: Notifying the next job to pick up the correct kernel tag
+        run: |
+          echo "${KERNEL_VERSION}"
   nightly-tests:
-    runs-on: nvme-nvm
     if: github.repository == 'linux-nvme/nvme-cli'
+    runs-on: arc-vm-runner-set
+    needs: request-kernel-version
     container:
       image: ghcr.io/linux-nvme/debian.python:latest
       #Expose all devices to the container through the `privileged` flag.
       #
       #BDEV0 is an environment variable of the self-hosted runner instance
-      #that contains a valid nvme ctrl name which is capable of the nvm
+      #that contains a valid nvme namespace which is capable of the nvm
       #command set.
       options: '--privileged -v "/dev":"/dev":z -e BDEV0'
     steps:
@@ -31,11 +44,11 @@ jobs:
           scripts/build.sh -b release -c gcc
       - name: Overwrite test config
         run: |
-          CONTROLLER=$(echo /dev/${BDEV0} | sed 's/n[0-9]*$//')
+          CONTROLLER=$(echo ${BDEV0} | sed 's/n[0-9]*$//')
           cat > tests/config.json << EOF
           {
             "controller" : "$CONTROLLER",
-            "ns1": "/dev/${BDEV0}",
+            "ns1": "${BDEV0}",
             "log_dir": "tests/nvmetests/",
             "nvme_bin": "$(pwd)/.build-ci/nvme"
           }