syz-cluster: initial code

The basic code of a K8S-based cluster that:
* Aggregates new LKML patch series.
* Determines the kernel trees to apply them to.
* Builds the basic and the patched kernel.
* Displays the results on a web dashboard.

This is a very rudimentary version with a lot of TODOs that
provides a skeleton for further work.

The project makes use of Argo workflows and Spanner DB.
Bootstrap is used for the web interface.

Overall structure:
* syz-cluster/dashboard: a web dashboard listing patch series
  and their test results.
* syz-cluster/series-tracker: polls Lore archives and submits
  the new patch series to the DB.
* syz-cluster/controller: schedules workflows and provides API for them.
* syz-cluster/kernel-disk: a cron job that keeps a kernel checkout up to date.
* syz-cluster/workflow/*: workflow steps.

For the DB structure see syz-cluster/pkg/db/migrations/*.

3 files changed, 65 insertions, 0 deletions

diff --git a/syz-cluster/kernel-disk/cron.yaml b/syz-cluster/kernel-disk/cron.yaml
new file mode 100644
index 000000000..8249e9c77
--- /dev/null
+++ b/syz-cluster/kernel-disk/cron.yaml
@@ -0,0 +1,45 @@
+# Copyright 2025 syzkaller project authors. All rights reserved.
+# Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
+
+apiVersion: batch/v1
+kind: CronJob
+metadata:
+  name: kernel-repo-update
+spec:
+  schedule: "0 */6 * * *" # Update every 6 hours
+  jobTemplate:
+    spec:
+      template:
+        spec:
+          restartPolicy: Never
+          volumes:
+            - name: git-repo
+              persistentVolumeClaim:
+                claimName: base-kernel-repo-pv-claim
+          containers:
+            - name: git-updater-debug-job
+              image: alpine/git:latest
+              imagePullPolicy: IfNotPresent
+              volumeMounts:
+                - name: git-repo
+                  mountPath: /repo.git
+              resources:
+                requests:
+                  cpu: 4
+                  memory: 8G
+                limits:
+                  cpu: 8
+                  memory: 16G
+              command: # TODO: request the trees via the controller's API.
+                - "/bin/sh"
+                - "-c"
+                - |
+                  cd /repo.git
+                  if [ ! -d "refs" ]; then
+                    git init --bare
+                  fi
+                  if ! git config --get remote.torvalds.url > /dev/null; then
+                    git remote add torvalds git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
+                  fi
+                  git fetch torvalds --tags
+                  git tag -f torvalds-head torvalds/master
diff --git a/syz-cluster/kernel-disk/kustomization.yaml b/syz-cluster/kernel-disk/kustomization.yaml
new file mode 100644
index 000000000..aeff33f63
--- /dev/null
+++ b/syz-cluster/kernel-disk/kustomization.yaml
@@ -0,0 +1,6 @@
+# Copyright 2025 syzkaller project authors. All rights reserved.
+# Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
+
+resources:
+  - pvc.yaml
+  - cron.yaml
diff --git a/syz-cluster/kernel-disk/pvc.yaml b/syz-cluster/kernel-disk/pvc.yaml
new file mode 100644
index 000000000..1977e969b
--- /dev/null
+++ b/syz-cluster/kernel-disk/pvc.yaml
@@ -0,0 +1,14 @@
+# Copyright 2025 syzkaller project authors. All rights reserved.
+# Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
+
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: base-kernel-repo-pv-claim
+spec:
+  storageClassName: standard
+  accessModes:
+    - ReadWriteMany
+  resources:
+    requests:
+      storage: 32Gi