Update Praefect virtual_storages format in ref architectures

The default => directly nodes format is deprecated, and we should
be using default => nodes => node{1,2,..}

doc/administration/reference_architectures/10k_users.md

@@ -1582,10 +1582,10 @@ To configure the Praefect nodes, on each one:
    # server ('praefect') and in git_data_dirs on Gitaly nodes ('gitaly-1')
    praefect['virtual_storages'] = {
      'default' => {
+       'nodes' => {
          'gitaly-1' => {
            'address' => 'tcp://10.6.0.91:8075',
-         'token'   => '<praefect_internal_token>',
-         'primary' => true
+           'token'   => '<praefect_internal_token>'
          },
          'gitaly-2' => {
            'address' => 'tcp://10.6.0.92:8075',
@@ -1597,6 +1597,7 @@ To configure the Praefect nodes, on each one:
          },
        }
      }
+   }
 
    # Set the network addresses that the exporters will listen on for monitoring
    node_exporter['listen_address'] = '0.0.0.0:9100'

doc/administration/reference_architectures/25k_users.md

@@ -1584,10 +1584,10 @@ To configure the Praefect nodes, on each one:
    # server ('praefect') and in git_data_dirs on Gitaly nodes ('gitaly-1')
    praefect['virtual_storages'] = {
      'default' => {
+       'nodes' => {
          'gitaly-1' => {
            'address' => 'tcp://10.6.0.91:8075',
-         'token'   => '<praefect_internal_token>',
-         'primary' => true
+           'token'   => '<praefect_internal_token>'
          },
          'gitaly-2' => {
            'address' => 'tcp://10.6.0.92:8075',
@@ -1599,6 +1599,7 @@ To configure the Praefect nodes, on each one:
          },
        }
      }
+   }
 
    # Set the network addresses that the exporters will listen on for monitoring
    node_exporter['listen_address'] = '0.0.0.0:9100'

doc/administration/reference_architectures/3k_users.md

@@ -1282,10 +1282,10 @@ To configure the Praefect nodes, on each one:
    # server ('praefect') and in git_data_dirs on Gitaly nodes ('gitaly-1')
    praefect['virtual_storages'] = {
      'default' => {
+       'nodes' => {
          'gitaly-1' => {
            'address' => 'tcp://10.6.0.91:8075',
-         'token'   => '<praefect_internal_token>',
-         'primary' => true
+           'token'   => '<praefect_internal_token>'
          },
          'gitaly-2' => {
            'address' => 'tcp://10.6.0.92:8075',
@@ -1297,6 +1297,7 @@ To configure the Praefect nodes, on each one:
          },
        }
      }
+   }
 
    # Set the network addresses that the exporters will listen on for monitoring
    node_exporter['listen_address'] = '0.0.0.0:9100'

doc/administration/reference_architectures/50k_users.md

@@ -1591,10 +1591,10 @@ To configure the Praefect nodes, on each one:
    # server ('praefect') and in git_data_dirs on Gitaly nodes ('gitaly-1')
    praefect['virtual_storages'] = {
      'default' => {
+       'nodes' => {
          'gitaly-1' => {
            'address' => 'tcp://10.6.0.91:8075',
-         'token'   => '<praefect_internal_token>',
-         'primary' => true
+           'token'   => '<praefect_internal_token>'
          },
          'gitaly-2' => {
            'address' => 'tcp://10.6.0.92:8075',
@@ -1606,6 +1606,7 @@ To configure the Praefect nodes, on each one:
          },
        }
      }
+   }
 
    # Set the network addresses that the exporters will listen on for monitoring
    node_exporter['listen_address'] = '0.0.0.0:9100'

doc/administration/reference_architectures/5k_users.md

@@ -1273,10 +1273,10 @@ To configure the Praefect nodes, on each one:
    # server ('praefect') and in git_data_dirs on Gitaly nodes ('gitaly-1')
    praefect['virtual_storages'] = {
      'default' => {
+       'nodes' => {
          'gitaly-1' => {
            'address' => 'tcp://10.6.0.91:8075',
-         'token'   => '<praefect_internal_token>',
-         'primary' => true
+           'token'   => '<praefect_internal_token>'
          },
          'gitaly-2' => {
            'address' => 'tcp://10.6.0.92:8075',
@@ -1288,6 +1288,7 @@ To configure the Praefect nodes, on each one:
          },
        }
      }
+   }
 
    # Set the network addresses that the exporters will listen on for monitoring
    node_exporter['listen_address'] = '0.0.0.0:9100'