chart, salt: Add annotations to fluent-bit pod

Add annotations containing configmap and secret to fluent-bit pod so it
is restarted whenever these objects are updated.

MK8S-203

Author: eg-ayoub

CHANGELOG.md

@@ -60,6 +60,9 @@
 - Implement ability to add certificates to fluent-bit by mounting a fluent-bit-certs secret
   (PR[#4812](https://github.com/scality/metalk8s/pull/4812))
 
+- Ensure fluent-bit pods are restarted when its configmap or secret is modified
+  (PR[#4834](https://github.com/scality/metalk8s/pull/4834))
+
 ### Bug Fixes
 
 - Fix a bug where part of the upgrade process would silently be skipped

charts/fluent-bit.yaml

@@ -5,9 +5,8 @@ image:
 existingConfigMap: fluent-bit
 
 podAnnotations:
-  prometheus.io/scrape: "true"
-  prometheus.io/port: "2020"
-  prometheus.io/path: /api/v1/metrics/prometheus
+  checksum/config: '__slot__:salt:metalk8s_kubernetes.get_object_digest(kind="ConfigMap", apiVersion="v1", namespace="metalk8s-logging", name="fluent-bit", path="data:fluent-bit.conf")'
+  checksum/secret: '__slot__:salt:metalk8s_kubernetes.get_object_digest(kind="Secret", apiVersion="v1", namespace="metalk8s-logging", name="fluent-bit-certs")'
 
 resources: '__var__(fluent_bit.spec.deployment.resources)'
 

salt/metalk8s/addons/logging/fluent-bit/deployed/chart.sls

@@ -1694,10 +1694,10 @@ spec:
   template:
     metadata:
       annotations:
-        checksum/config: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
-        prometheus.io/path: /api/v1/metrics/prometheus
-        prometheus.io/port: '2020'
-        prometheus.io/scrape: 'true'
+        checksum/config: __slot__:salt:metalk8s_kubernetes.get_object_digest(kind="ConfigMap",
+          apiVersion="v1", namespace="metalk8s-logging", name="fluent-bit", path="data:fluent-bit.conf")
+        checksum/secret: __slot__:salt:metalk8s_kubernetes.get_object_digest(kind="Secret",
+          apiVersion="v1", namespace="metalk8s-logging", name="fluent-bit-certs")
       labels:
         app.kubernetes.io/instance: fluent-bit
         app.kubernetes.io/name: fluent-bit