Add description how to disable blob usage (#1383)

* doc: Add description how to disable blob usage

* doc: Rewrite the description of disabling blob

doc/content/the-things-stack/host/kubernetes/azure/architecture/_index.md

@@ -24,10 +24,10 @@ We use [Azure Database for PostgreSQL](https://learn.microsoft.com/en-us/azure/p
 
 Azure offers a managed [Azure Cache for Redis Database](https://azure.microsoft.com/en-us/products/cache) service, but due to it's version not being compatible with {{% tts %}} the Redis we use is in-cluster. The newest Redis version supported by Azure Cache is 6.0, while the minimum required version of Redis for {{% tts %}} is 6.2.
 
-User uploads of profile pictures and end device pictures are stored in public Azure Storage Containers.
+User uploads of profile pictures and end device pictures are stored in public Azure Storage Containers (Optional).
 
 ## Configuration
 
 The Azure Kubernetes deployment of {{% tts %}} uses a combination of configuration stored as Terraform and Helm configuration files.
 
-The configuration for interoperability with other LoRaWAN Backend Interfaces-compliant servers is stored as multiple files in a private Azure Storage Account.
+The configuration for interoperability with other LoRaWAN Backend Interfaces-compliant servers is stored as multiple files in a private Azure Storage Account (Optional).

doc/content/the-things-stack/host/kubernetes/generic/configuration/_index.md

@@ -25,7 +25,7 @@ global:
       adminUserID: # User ID for the Administrator of the tenant. Do not use `admin`.
       adminEmail: # Email of the Administrator of the tenant.
   blob:
-    provider: "aws", "azure", "gcp" or "local"
+    provider: # "aws", "azure", "gcp", "local" or empty string to disable blob usage
     aws: # Set only if provider is "aws".
       region: # region
       accessKeyID: # AWS access key ID
@@ -65,6 +65,9 @@ global:
   tenancy:
     adminKey: # See preparation section.
   interop:
+    # Description: Interoperability configuration source.
+    # Expected value: "blob", "directory", "url" or empty string to disable blob usage
+    configSource: "blob"
     blob:
       # Description: Bucket for interoperability configuration.
       # Expected value: string

doc/content/the-things-stack/host/kubernetes/generic/preparation/_index.md

@@ -22,8 +22,8 @@ Copy each generated secret to a local file and then transfer those values later
 | PProf Password                        | Password to access profiling (pprof)                                  | 16   | `global.http.pprof.password`        |
 | Console Oauth Secret                  | Secret used by the Console to connect to The Things Stack             | 16   | `global.console.oauth.clientSecret` |
 | Tenant Administration Key             | Secret used to administer cluster tenants                             | 32   | `global.tenancy.adminKey`           |
-| NOC Grafana Admin Password (optional) | Grafana admin password for The Things Stack Network Operations Center | 24   | `noc.grafana.adminPassword`         |
-| NOC Oauth Client Secret (optional)    | OAuth client secret for The Things Stack Network Operations Center    | 24   | `noc.oauth.clientSecret`            |
+| NOC Grafana Admin Password (optional) | Grafana admin password for The Things Stack Network Operations Center | 24   | `global.noc.grafana.adminPassword`  |
+| NOC Oauth Client Secret (optional)    | OAuth client secret for The Things Stack Network Operations Center    | 24   | `global.noc.oauth.clientSecret`     |
 
 The simplest option is to use `openssl`.
 

doc/content/the-things-stack/host/kubernetes/generic/prerequisites/_index.md

@@ -105,6 +105,10 @@ $ sudo chown -R 886:886 <blob>
 2. Create the `edcs`, `interop`, `end_device_pictures` and `profile_pictures` folders at the root of the blob folder.
 3. Create an empty `config.yml` in the `edcs` and `interop` folders.
 
+##### Disabling Blob Storage
+
+{{% tts %}} Helm Charts by default expects a blob storage configured but it is possible to use {{% tts %}} without it. You can disable the usage of blob by setting `global.interop.configSource` and `global.blob.provider` values to an empty string `""`.
+
 #### 5. Traefik Proxy
 
 The Things Stack Helm Charts currently only supports the [Traefik](https://traefik.io/traefik/) proxy out of the box to load balance incoming traffic.
@@ -229,9 +233,9 @@ The Things Stack expects the name of this secret to be set in the value `global.
 
 The process of provisioning and maintenance of the certificate secret is left to the operator.
 
-#### 7. (optional) TimescaleDB
+#### 7. (Optional) TimescaleDB
 
-Both {{% tts %}} [Storage Integration](https://www.thethingsindustries.com/docs/integrations/storage/) and {% tts %}} [Network Operations Center](https://www.thethingsindustries.com/docs/reference/components/network-operations-center/#accessing-network-operations-center) require a TimescaleDB instance.
+Both {{% tts %}} [Storage Integration](https://www.thethingsindustries.com/docs/integrations/storage/) and {{% tts %}} [Network Operations Center](https://www.thethingsindustries.com/docs/reference/components/network-operations-center/#accessing-network-operations-center) require a TimescaleDB instance.
 
 There can either be two separate TimeScaleDB instances or a single instance but different Databases.