Add daemonset sample

This is mostly like busybox deployment using a daemonset instead of
deployment.

Signed-off-by: Nir Soffer <[email protected]>

busybox-daemonset/daemonset.yaml

@@ -0,0 +1,47 @@
+---
+apiVersion: apps/v1
+kind: DaemonSet
+metadata:
+  name: busybox
+spec:
+  selector:
+    matchLabels:
+      appname: busybox
+  template:
+    metadata:
+      labels:
+        appname: busybox
+    spec:
+      containers:
+        - name: logger
+          image: quay.io/nirsof/busybox:stable
+          imagePullPolicy: IfNotPresent
+          command:
+            - sh
+            - -c
+            - |
+              emit() {
+                  echo "$(date) $1" | tee -a /var/log/ramen.log
+                  sync
+              }
+              trap "emit STOP; exit" TERM
+              emit START
+              while true; do
+                  sleep 10 & wait
+                  emit UPDATE
+              done
+          volumeMounts:
+            - name: varlog
+              mountPath: /var/log
+      volumes:
+        - name: varlog
+          persistentVolumeClaim:
+            claimName: busybox-pvc
+      tolerations:
+        # Run also on control-plane and master nodes.
+        - key: node-role.kubernetes.io/control-plane
+          operator: Exists
+          effect: NoSchedule
+        - key: node-role.kubernetes.io/master
+          operator: Exists
+          effect: NoSchedule

busybox-daemonset/kustomization.yaml

@@ -0,0 +1,6 @@
+---
+resources:
+- pvc.yaml
+- daemonset.yaml
+commonLabels:
+  appname: busybox

busybox-daemonset/pvc.yaml

@@ -0,0 +1,12 @@
+---
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: busybox-pvc
+spec:
+  accessModes:
+  - ReadWriteOnce
+  storageClassName: rook-ceph-block
+  resources:
+    requests:
+      storage: 1Gi

dr-daemonset/kustomization.yaml

@@ -0,0 +1,6 @@
+---
+resources:
+  - ../dr
+namespace: busybox-sample-daemonset
+commonLabels:
+  app: busybox-sample-daemonset

subscription-daemonset/kustomization.yaml

@@ -0,0 +1,14 @@
+---
+resources:
+  - ../subscription
+namespace: busybox-sample-daemonset
+commonLabels:
+  app: busybox-sample-daemonset
+patches:
+  - target:
+      kind: Subscription
+      name: busybox-sub
+    patch: |-
+      - op: replace
+        path: /metadata/annotations/apps.open-cluster-management.io~1github-path
+        value: busybox-daemonset