Merge branch 'ash2k/private-api-env-vars' into 'master'

KAS: mention new env vars for private API

See merge request https://gitlab.com/gitlab-org/omnibus-gitlab/-/merge_requests/7159

Merged-by: Balasankar 'Balu' C <[email protected]>
Approved-by: Jason Plum <[email protected]>
Approved-by: Achilleas Pipinellis <[email protected]>
Approved-by: Balasankar 'Balu' C <[email protected]>
Reviewed-by: Balasankar 'Balu' C <[email protected]>
Co-authored-by: Mikhail Mazurskiy <[email protected]>

Author: balasankarc

files/gitlab-config-template/gitlab.rb.template

@@ -2037,8 +2037,15 @@ external_url 'GENERATED_EXTERNAL_URL'
 ##! Environment variables for GitLab KAS
 # gitlab_kas['env'] = {
 #   'SSL_CERT_DIR' => "/opt/gitlab/embedded/ssl/certs/",
-#   # In a multi-node setup, this address MUST be reachable from other KAS instances. In a single-node setup, it can be on localhost for simplicity
+#   # In a multi-node setup, this address MUST be reachable from other KAS instances. In a single-node setup,
+#   # it can be on localhost for simplicity.
+#   # Use OWN_PRIVATE_API_CIDR + OWN_PRIVATE_API_PORT (optional) + OWN_PRIVATE_API_SCHEME (optional) if you cannot
+#   # specify a correct address for each KAS instance in OWN_PRIVATE_API_URL.
 #   'OWN_PRIVATE_API_URL' => 'grpc://localhost:8155'
+#   # 'OWN_PRIVATE_API_CIDR' => '10.0.0.0/8', # IPv4 example
+#   # 'OWN_PRIVATE_API_CIDR' => '2001:db8:8a2e:370::7334/64', # IPv6 example
+#   # 'OWN_PRIVATE_API_PORT' => '8155', # if not set, port from private_api_listen_address is used
+#   # 'OWN_PRIVATE_API_SCHEME' => 'grpc', # use grpcs when using TLS on private API endpoint
 # }
 
 ##! Error Reporting and Logging with Sentry