Update concpets for redissentinel

Signed-off-by: Neaj Morshad <[email protected]>

docs/guides/redis/concepts/redissentinel.md

@@ -81,7 +81,7 @@ spec:
       imagePullSecrets:
         - name: regcred
       containers:
-      - name: redis
+      - name: redissentinel
         args:
           - "--loglevel verbose"
         env:
@@ -248,9 +248,9 @@ KubeDB accept following fields to set in `spec.podTemplate:`
 - controller:
   - annotations (petset's annotation)
 - spec:
-  - args
-  - env
-  - resources
+  - containers
+  - volumes
+  - podPlacementPolicy
   - initContainers
   - imagePullSecrets
   - nodeSelector
@@ -265,14 +265,37 @@ KubeDB accept following fields to set in `spec.podTemplate:`
   - readinessProbe
   - lifecycle
 
+You can check out the full list [here](https://github.com/kmodules/offshoot-api/blob/master/api/v2/types.go#L26C1-L279C1).
 Uses of some field of `spec.podTemplate` is described below,
 
-#### spec.podTemplate.spec.args
- `spec.podTemplate.spec.args` is an optional field. This can be used to provide additional arguments to database installation.
+#### spec.podTemplate.spec.tolerations
 
-### spec.podTemplate.spec.env
+The `spec.podTemplate.spec.tolerations` is an optional field. This can be used to specify the pod's tolerations.
 
-`spec.podTemplate.spec.env` is an optional field that specifies the environment variables to pass to the Redis docker image.
+#### spec.podTemplate.spec.volumes
+
+The `spec.podTemplate.spec.volumes` is an optional field. This can be used to provide the list of volumes that can be mounted by containers belonging to the pod.
+
+#### spec.podTemplate.spec.podPlacementPolicy
+
+`spec.podTemplate.spec.podPlacementPolicy` is an optional field. This can be used to provide the reference of the podPlacementPolicy. This will be used by our Petset controller to place the db pods throughout the region, zone & nodes according to the policy. It utilizes kubernetes affinity & podTopologySpreadContraints feature to do so.
+
+
+
+
+#### spec.podTemplate.spec.containers
+
+The `spec.podTemplate.spec.containers` can be used to provide the list containers and their configurations for to the database pod. some of the fields are described below,
+
+##### spec.podTemplate.spec.containers[].name
+The `spec.podTemplate.spec.containers[].name` field used to specify the name of the container specified as a DNS_LABEL. Each container in a pod must have a unique name (DNS_LABEL). Cannot be updated.
+
+##### spec.podTemplate.spec.containers[].args
+`spec.podTemplate.spec.containers[].args` is an optional field. This can be used to provide additional arguments to database installation.
+
+##### spec.podTemplate.spec.containers[].env
+
+`spec.podTemplate.spec.containers[].env` is an optional field that specifies the environment variables to pass to the Redis containers.
 
 Note that, KubeDB does not allow to update the environment variables. If you try to update environment variables, KubeDB operator will reject the request with following error,
 
@@ -288,9 +311,13 @@ name
 namespace
 spec.storage
 spec.podTemplate.spec.nodeSelector
-spec.podTemplate.spec.env
+spec.podTemplate.spec.containers[].env
 ```
 
+##### spec.podTemplate.spec.containers[].resources
+
+`spec.podTemplate.spec.containers[].resources` is an optional field. This can be used to request compute resources required by containers of the database pods. To learn more, visit [here](http://kubernetes.io/docs/user-guide/compute-resources/).
+
 #### spec.podTemplate.spec.imagePullSecret
 
 `KubeDB` provides the flexibility of deploying Redis server from a private Docker registry. To learn how to deploy Redis from a private registry, please visit [here](/docs/guides/redis/private-registry/using-private-registry.md).
@@ -309,10 +336,6 @@ spec.podTemplate.spec.env
 
   If a service account name is given, and there's an existing service account by that name, the KubeDB operator will use that existing service account. Since this service account is not managed by KubeDB, users are responsible for providing necessary access permissions manually. Follow the guide [here](/docs/guides/redis/custom-rbac/using-custom-rbac.md) to grant necessary permissions in this scenario.
 
-#### spec.podTemplate.spec.resources
-
-`spec.podTemplate.spec.resources` is an optional field. This can be used to request compute resources required by the database pods. To learn more, visit [here](http://kubernetes.io/docs/user-guide/compute-resources/).
-
 ### spec.serviceTemplates
 
 You can also provide a template for the services created by KubeDB operator for Redis server through `spec.serviceTemplates`. This will allow you to set the type and other properties of the services.