Auto create InfluxDB database and users

Signed-off-by: Julien Riou <julien@riou.xyz>

README.md

@@ -16,7 +16,7 @@ This stack is also known as the **TIG** stack.
 The easiest way to test is to use [Docker](https://www.docker.com/). Ensure you have `docker` and
 `docker-compose` binary installed.
 
-Write your miner address, grafana username and grafana password:
+Write your miner address, grafana and influxdb credentials:
 
 ```
 vi docker/environment
@@ -25,14 +25,13 @@ vi docker/environment
 Then start containers:
 
 ```
-docker-compose up
+docker-compose up -d
 ```
 
 ## Going further
 
 You should secure [InfluxDB](https://docs.influxdata.com/influxdb/v1.7/administration/security/) by using encryption for
-communication, tokens for authentication (one read-only token for Grafana, one write only for Telegraf). The stack
-doesn't require Docker.
+communication. The stack doesn't require Docker.
 
 ## Disclaimer
 

docker-compose.yml

@@ -3,6 +3,8 @@ version: "2"
 services:
   influxdb:
     container_name: influxdb
+    env_file:
+      - ./docker/environment
     image: influxdb:1.7.10
     ports:
       - "8083:8083"
@@ -32,7 +34,7 @@ services:
       - ./docker/environment
     image: telegraf:1.15.4
     volumes:
-      - ./docker/telegraf/telegraf.conf:/etc/telegraf/telegraf.conf
+      - ./docker/telegraf.conf:/etc/telegraf/telegraf.conf
       - ./telegraf:/etc/telegraf/telegraf.d
     links:
       - "influxdb:influxdb"

docker/environment

@@ -1,3 +1,10 @@
 MINER_ADDRESS=
-GF_SECURITY_ADMIN_USER=
+GF_SECURITY_ADMIN_USER=admin
 GF_SECURITY_ADMIN_PASSWORD=
+INFLUXDB_DB=metrics
+INFLUXDB_WRITE_USER=telegraf
+INFLUXDB_WRITE_USER_PASSWORD=
+INFLUXDB_READ_USER=grafana
+INFLUXDB_READ_USER_PASSWORD=
+INFLUXDB_ADMIN_USER=admin
+INFLUXDB_ADMIN_USER_PASSWORD=

docker/telegraf.conf

@@ -13,5 +13,5 @@
   omit_hostname = false
 
 [[outputs.influxdb]]
-  database = "metrics"
-  urls = ["http://influxdb:8086"]
+  database = "${INFLUXDB_DB}"
+  urls = ["http://${INFLUXDB_WRITE_USER}:${INFLUXDB_WRITE_USER_PASSWORD}@influxdb:8086"]