Fluent-Logging: Update fluent-bit to use common OSH entrypoint pattern

This PS updates the fluent-logging chart to use the same entrypoint
pattern as other OSH components.

Change-Id: I3bf9baf9824e1b7f7e46c4fcae292240566d9153

fluent-logging/templates/bin/_fluent-bit.sh.tpl

@@ -0,0 +1,21 @@
+#!/bin/sh
+
+{{/*
+Copyright 2017 The Openstack-Helm Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+   http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/}}
+
+set -ex
+
+exec /fluent-bit/bin/fluent-bit -c /fluent-bit/etc/fluent-bit.conf

fluent-logging/templates/configmap-bin.yaml

@@ -24,6 +24,8 @@ metadata:
 data:
   fluentd.sh: |
 {{ tuple "bin/_fluentd.sh.tpl" . | include "helm-toolkit.utils.template" | indent 4 }}
+  fluent-bit.sh: |
+{{ tuple "bin/_fluent-bit.sh.tpl" . | include "helm-toolkit.utils.template" | indent 4 }}
   helm-tests.sh: |
 {{ tuple "bin/_helm-tests.sh.tpl" . | include "helm-toolkit.utils.template" | indent 4 }}
   image-repo-sync.sh: |+

fluent-logging/templates/daemonset-fluent-bit.yaml

@@ -51,7 +51,13 @@ spec:
           image: {{ .Values.images.tags.fluentbit }}
           imagePullPolicy: {{ .Values.images.pull_policy }}
 {{ tuple $envAll $envAll.Values.pod.resources.fluentbit | include "helm-toolkit.snippets.kubernetes_resources" | indent 10 }}
+          command:
+            - /tmp/fluent-bit.sh
           volumeMounts:
+            - name: fluent-logging-bin
+              mountPath: /tmp/fluent-bit.sh
+              subPath: fluent-bit.sh
+              readOnly: true
             - name: varlog
               mountPath: /var/log
             - name: varlibdockercontainers
@@ -74,6 +80,10 @@ spec:
         - name: varlibdockercontainers
           hostPath:
             path: /var/lib/docker/containers
+        - name: fluent-logging-bin
+          configMap:
+            name: fluent-logging-bin
+            defaultMode: 0555
         - name: fluent-logging-etc
           configMap:
             name: fluent-logging-etc