Allow user to define busybox image (#1643)

Co-authored-by: Vishal <vishal-biyani@users.noreply.github.com>

charts/fission-all/templates/fluentbit.yaml

@@ -96,7 +96,7 @@ spec:
     spec:
       initContainers:
         - name: init
-          image: busybox
+          image: {{ .Values.busyboxImage | quote }}
           imagePullPolicy: {{ .Values.pullPolicy }}
           command: ['mkdir', '-p', '/var/log/fission']
           volumeMounts:

charts/fission-all/values.yaml

@@ -265,6 +265,9 @@ analyticsNonHelmInstall: false
 ## Enable Heapster only in clusters where heapster does not exist already
 heapster: false
 
+# Allow user to override busybox image used in fluent-bit init container
+busyboxImage: busybox
+
 ## Archive pruner is a garbage collector for archives on the fission storage service.
 ## This interval configures the frequency at which it runs inside the storagesvc pod.
 ## The value is in minutes.