@startuml title Host Mapping hide footbox autonumber participant "Client" as c participant "Gateway\nexternal=gw.ext" as gw box "Hadoop Cluster" participant "NameNode\nexternal=nn.ext\ninternal=nn.int" as nn participant "DataNode\nexternal=dn.ext\ninternal=dn.int" as dn end box '1 c->gw note right: POST https://gw.ext:8443/gateway/cluster/webhdfs/v1/temp/file activate c '2 gw->nn note right: POST http://nn.ext:50070/webhdfs/v1/temp/file activate gw activate nn '3 gw<--nn note right: 201, Location=http://<b><u>dn.int</u></b>:50075/webhdfs/v1/temp/file deactivate nn '4 gw->gw note right: Hostmap: <b><i>dn.int -> dn.ext '5 c<--gw note right: 201, Location=https://gw.ext:8443/gateway/cluster/webhdfs/data/temp/file?_=<i><color:green>[loc=http://<b><u>dn.ext</u></b>:50075/webhdfs/v1/temp/file>]</i> deactivate gw '6 c->gw note right: POST https://gw.ext:8443/gateway/cluster/webhdfs/data/temp/file?_=<i><color:green>[loc=http://<b><u>dn.ext</u></b>:50075/webhdfs/v1/temp/file>]</i> activate gw '7 gw->dn note right: POST loc=http://<b><u>dn.ext</u></b>:50075/webhdfs/v1/temp/file> activate dn '8 gw<--dn: OK note right: 200 OK deactivate dn '9 c<--gw: note right: 200 OK deactivate gw deactivate c legend center Text show in <i><color:green>[italic green]</color></i> above is encrypted. endlegend @enduml |