Add force_boot command to rabbit start template

Currently, if a multi-node cluster is shut down unexpectedly,
RabbitMQ is not able to boot and sync with the other nodes.

The purpose of this change is to add the possibility to use the
rabbitmqctl force_boot command to recover RabbitMQ cluster from
an unexpected shut down.

Test plan:
PASS: Shutdown and start a multi-node RabbitMQ cluster

Regression:
PASS: OpenStack can be applied successfully
PASS: RabbitMQ nodes can join the RabbitMQ cluster

Story: 2009784
Task: 44290

Ref:
[0] https://www.rabbitmq.com/rabbitmqctl.8.html#force_boot

Signed-off-by: Maik Catrinque <maik.wandercatrinqueandrade@windriver.com>
Co-authored-by: Andrew Martins Carletti <Andrew.MartinsCarletti@windriver.com>
Change-Id: I56e966ea64e8881ba436213f0c9e1cbe547098e3

rabbitmq/Chart.yaml

@@ -15,6 +15,6 @@ apiVersion: v1
 appVersion: v3.7.26
 description: OpenStack-Helm RabbitMQ
 name: rabbitmq
-version: 0.1.15
+version: 0.1.16
 home: https://github.com/rabbitmq/rabbitmq-server
 ...

rabbitmq/templates/bin/_rabbitmq-start.sh.tpl

@@ -94,4 +94,7 @@ if ! [ "${POD_INCREMENT}" -eq "0" ] && ! [ -d "/var/lib/rabbitmq/mnesia" ] ; the
   rm -fv /tmp/rabbit-disable-readiness /tmp/rabbit-disable-liveness-probe
 fi
 
+{{- if .Values.forceBoot.enabled }}
+if [ "${POD_INCREMENT}" -eq "0" ] && [ -d "/var/lib/rabbitmq/mnesia/${RABBITMQ_NODENAME}" ]; then rabbitmqctl force_boot; fi
+{{- end}}
 exec rabbitmq-server

rabbitmq/values.yaml

@@ -46,6 +46,12 @@ images:
       - dep_check
       - image_repo_sync
 
+# forceBoot: executes 'rabbitmqctl force_boot' to force boot on
+# cluster shut down unexpectedly in an unknown order.
+# ref: https://www.rabbitmq.com/rabbitmqctl.8.html#force_boot
+forceBoot:
+  enabled: false
+
 pod:
   probes:
     prometheus_rabbitmq_exporter:

releasenotes/notes/rabbitmq.yaml

@@ -15,4 +15,5 @@ rabbitmq:
   - 0.1.13 Add prestop action and version 3.8.x upgrade prep
   - 0.1.14 Update readiness and liveness probes
   - 0.1.15 Update htk requirements
+  - 0.1.16 Add force_boot command to rabbit start template
 ...