🔧 Add sysctl demonset to fix log streaming error

The symptom is: create fsnotify watcher: too many open files

(When trying to follow logs with e.g. kubectl logs or stern.)

I think this is a kubelet resource issue so the sysctl needs
to be adjusted on every node - hence a DaemonSet.

k8s/sysctl.yaml

@@ -0,0 +1,27 @@
+apiVersion: apps/v1
+kind: DaemonSet
+metadata:
+  name: sysctl
+spec:
+  selector:
+    matchLabels:
+      app: sysctl
+  template:
+    metadata:
+      labels:
+        app: sysctl
+    spec:
+      tolerations:
+      - operator: Exists
+      initContainers:
+      - name: sysctl
+        image: alpine
+        securityContext:
+          privileged: true
+        command:
+        - sysctl
+        - fs.inotify.max_user_instances=99999
+      containers:
+      - name: pause
+        image: registry.k8s.io/pause:3.8
+