Update fluentd to latest quay.io image, add json parser for message

charts/kubezero-logging/README.md.gotmpl

@@ -45,3 +45,4 @@
 
 - https://www.elastic.co/downloads/elastic-cloud-kubernetes
 - https://github.com/elastic/cloud-on-k8s
+- https://grafana.com/grafana/dashboards/7752

charts/kubezero-logging/values.yaml

@@ -31,7 +31,7 @@ fluentd:
   enabled: false
   image:
     repository: quay.io/fluentd_elasticsearch/fluentd
-    tag: v2.9.0
+    tag: v3.0.4
   istio:
     enabled: false
 
@@ -158,7 +158,15 @@ fluentd:
         </buffer>
       </match>
 
-#  filter.conf: |
+    filter.conf: |
+      <filter kube.*>
+        key_name message
+        remove_key_name_field true
+        <parse>
+          @type json
+        </parse>
+      </filter>
+
 #    <filter auth system.auth>
 #      @type parser
 #      key_name message