I'm writing a go app which is dockerized in 2 containers: db and app.
while starting containers 'docker-compose up' I see the message: dial tcp: lookup dbpgsql on 127.0.0.11:53: no such host
DB_ENV_DB=cldb
DB_ENV_USER=cldb
DB_ENV_PASS=cldb
DB_PORT_5432_TCP_ADDR=dbpgsql
DB_PORT_5432_TCP_PORT=5432
here is my docker-compose.yml
version: '2'
services:
server:
hostname: app
image: golang:1.7.3-alpine
build: ./server/
privileged: true
container_name: server
command: go run server.go
volumes:
- ../src/:/go/src/
- ../server.go:/go/server.go
links:
- db:db
ports:
- '8080:8080'
env_file: environment
db:
hostname: dbpgsql
image: postgres:latest
container_name: db
environment:
POSTGRES_USER: cldb
POSTGRES_PASSWORD: cldb
POSTGRES_DB: cldb
ports:
- '5432:5432'
volumes:
- ./data:/docker-entrypoint-initdb.d
The app fails here when DB.Ping() is executed:
func InitDB(dataSourceName string) {
var err error
DB, err = sql.Open("postgres", dataSourceName)
if err != nil {
log.Panic(err)
}
if err = DB.Ping(); err != nil {
log.Panic(err)
}
DB.SetMaxIdleConns(100)
}