d2s_db_setup.md

+#D2Sphere DB Setup
+
+## new DB connection setup
+
+* device-server will write into DB so no loadbalanceing only fallback
+* d2sphere-admin will read only from DB so loadbalanceing is ok
+
+```
+stage
+ds:
+url: jdbc:mysql://10.21.31.2,10.21.31.4,10.21.31.3/ds_stage
+admin:
+url: jdbc:mysql:loadbalance://10.21.31.2,10.21.31.3,10.21.31.4/ds_stage
+
+live
+ds:
+url: jdbc:mysql://10.21.31.2,10.21.31.4,10.21.31.3/ds_live
+admin:
+url: jdbc:mysql:loadbalance://10.21.31.2,10.21.31.3,10.21.31.4/ds_live
+
+eval
+ds:
+url: jdbc:mysql://10.21.31.4,10.21.31.2,10.21.31.3/ds_beta
+admin:
+url: jdbc:mysql:loadbalance://10.21.31.2,10.21.31.3,10.21.31.4/ds_beta
+
+custom
+ds:
+url: jdbc:mysql://10.21.31.4,10.21.31.2,10.21.31.3/ds_custom
+admin:
+url: jdbc:mysql:loadbalance://10.21.31.2,10.21.31.3,10.21.31.4/ds_custom
+
+```
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