allow custom hostnames setting for db, elastic, rabbit with envvar (#554

)

* allow custom hostnames setting for db, elastic, rabbit with envvar

You can not always assume the hostname of the remote services.

For example, in tezos-k8s, I am running everything in a pod, so
I need to set everything to `localhost`.

In order to not disrupt any existing workflow, we set these env
vars to standard values in the Dockerfile; they can be overridden
at runtime. See: https://stackoverflow.com/a/40334819/207209

* use default env in docker-compose instead of Dockerfile

* postgres => db

configs/production.yml

@@ -23,16 +23,16 @@ tzkt:
 
 storage:
   uri:
-    - http://elastic:9200
-    - http://elastic:9200
+    - http://${ELASTIC_HOSTNAME:-elastic}:9200
+    - http://${ELASTIC_HOSTNAME:-elastic}:9200
   timeout: 10
 
 rabbitmq:
-  uri: "amqp://${RABBITMQ_DEFAULT_USER}:${RABBITMQ_DEFAULT_PASS}@mq:5672/"
+  uri: "amqp://${RABBITMQ_DEFAULT_USER}:${RABBITMQ_DEFAULT_PASS}@${RABBITMQ_HOSTNAME:-mq}:5672/"
   timeout: 10
 
 db:
-  conn_string: "host=db port=5432 user=${POSTGRES_USER} dbname=${POSTGRES_DB} password=${POSTGRES_PASSWORD} sslmode=disable"
+  conn_string: "host=${DB_HOSTNAME:-db} port=5432 user=${POSTGRES_USER} dbname=${POSTGRES_DB} password=${POSTGRES_PASSWORD} sslmode=disable"
   timeout: 10
 
 oauth:

configs/sandbox.yml

@@ -5,15 +5,15 @@ rpc:
 
 storage:
   uri:
-    - http://elastic:9200
+    - http://${ELASTIC_HOSTNAME:-elastic}:9200
   timeout: 10
 
 rabbitmq:
-  uri: "amqp://${RABBITMQ_DEFAULT_USER}:${RABBITMQ_DEFAULT_PASS}@mq:5672/"
+  uri: "amqp://${RABBITMQ_DEFAULT_USER}:${RABBITMQ_DEFAULT_PASS}@${RABBITMQ_HOSTNAME:-mq}:5672/"
   timeout: 10
 
 db:
-  conn_string: "host=db port=5432 user=${POSTGRES_USER} dbname=${POSTGRES_DB} password=${POSTGRES_PASSWORD} sslmode=disable"
+  conn_string: "host=${DB_HOSTNAME:-db} port=5432 user=${POSTGRES_USER} dbname=${POSTGRES_DB} password=${POSTGRES_PASSWORD} sslmode=disable"
   timeout: 10
 
 share_path: ${HOME}/.bcd

configs/you.yml

@@ -23,15 +23,15 @@ tzkt:
 
 storage:
   uri:
-    - http://elastic:9200
+    - http://${ELASTIC_HOSTNAME:-elastic}:9200
   timeout: 10
 
 rabbitmq:
-  uri: "amqp://${RABBITMQ_DEFAULT_USER}:${RABBITMQ_DEFAULT_PASS}@mq:5672/"
+  uri: "amqp://${RABBITMQ_DEFAULT_USER}:${RABBITMQ_DEFAULT_PASS}@${RABBITMQ_HOSTNAME:-mq}:5672/"
   timeout: 10
 
 db:
-  conn_string: "host=db port=5432 user=${POSTGRES_USER} dbname=${POSTGRES_DB} password=${POSTGRES_PASSWORD} sslmode=disable"
+  conn_string: "host=${DB_HOSTNAME:-db} port=5432 user=${POSTGRES_USER} dbname=${POSTGRES_DB} password=${POSTGRES_PASSWORD} sslmode=disable"
   timeout: 10
 
 oauth: