package "Maps cache cluster" as cache {
   node cp2003 {
     [varnish-frontend] as vfe2003
     [varnish-backend] as vbe2003
   }
   node cp2009 {
     [varnish-frontend] as vfe2009
     [varnish-backend] as vbe2009
   }
   node cp2015 {
     [varnish-frontend] as vfe2015
     [varnish-backend] as vbe2015
   }
   node cp2021 {
     [varnish-frontend] as vfe2021
     [varnish-backend] as vbe2021
   }
 }

 () "Maps\n(internal)" as mapsI

 node "maps-test2001\n(master)" as maps2001 {
   [Kartotherian] as Kartotherian2001
   [Tilerator] as Tilerator2001
   [TileratorUI] as TileratorUI2001
   [Osmosis] as Osmosis2001
   [osm2pgsql] as osm2pgsql2001
   [shp2pgsql] as shp2pgsql2001
   database Cassandra as Cassandra2001
   database Redis as Redis2001
   database "Postgres\nmaster" as Postgres2001

   () TileratorUI as TileratorUI_endpoint2001

   Tilerator2001 -left-> Redis2001: get tile\nto generate
   Tilerator2001 --> Postgres2001
   Tilerator2001 -> Cassandra2001

   TileratorUI2001 --> Redis2001: submit list\nof tiles\nto generate

   Kartotherian2001 --> Cassandra2001

   Osmosis2001 --> osm: import diffs
   Osmosis2001 --> osm2pgsql2001
   osm2pgsql2001 --> Postgres2001
   shp2pgsql2001 --> osm
   shp2pgsql2001 --> Postgres2001

   TileratorUI_endpoint2001 -- TileratorUI2001

   note left of TileratorUI_endpoint2001
     TileratorUI is only
     accessed over SSH
   end note

   note right of Osmosis2001
     Osmosis is run daily
     from cron
   end note

   note right of shp2pgsql2001
     shp2pgsql is run
     monthly from cron
   end note
 }
 node "maps-test2002-4\n(slaves)" as maps2002 {
   [Kartotherian] as Kartotherian20xx
   [Tilerator] as Tilerator20xx
   database Cassandra as Cassandra20xx
   database "Postgres\nslaves" as Postgres20xx

   Tilerator20xx -left-> Redis2001: get tile\nto generate
   Tilerator20xx --> Postgres20xx
   Tilerator20xx --> Cassandra20xx

   Kartotherian20xx --> Cassandra20xx
 }

 mapsI - Kartotherian2001
 mapsI - Kartotherian20xx

 vbe2003 -> mapsI
 vbe2009 -> mapsI
 vbe2015 -> mapsI
 vbe2021 -> mapsI

 vfe2003 --> vbe2003
 vfe2009 --> vbe2009
 vfe2015 --> vbe2015
 vfe2021 --> vbe2021

' un comment the block below to have the mostly complete Varnish connections ' vfe2003 --> vbe2003 ' vfe2003 --> vbe2009 ' vfe2003 --> vbe2015 ' vfe2003 --> vbe2021 ' ' vfe2009 --> vbe2003 ' vfe2009 --> vbe2009 ' vfe2009 --> vbe2015 ' vfe2009 --> vbe2021 ' ' vfe2015 --> vbe2003 ' vfe2015 --> vbe2009 ' vfe2015 --> vbe2015 ' vfe2015 --> vbe2021 ' ' vfe2021 --> vbe2003 ' vfe2021 --> vbe2009 ' vfe2021 --> vbe2015 ' vfe2021 --> vbe2021

 mapsP -- vfe2003
 mapsP -- vfe2009
 mapsP -- vfe2015
 mapsP -- vfe2021

 Postgres20xx <. Postgres2001
 Cassandra20xx <.> Cassandra2001

 note right of cache
   interconnections between
   Varnish frontend and backend
   are more complex, not showing
   all this here.
 end note

 note right of mapsI
   Kartotherian is a
   LVS service
 end note

}

note as n1

- unsure about what communication
  there is between maps-test nodes
- tileratorui runs on all nodes but
  should be used only on only one
  instance.

end note

@enduml