I'm new to Docker and facing challenges in connecting two separate services using docker-compose. I need to be able to write to a database and read from it. Additionally, each container should be able to ping the other one.
When I run
docker exec -ti node-app ping mongodocker exec -ti mongo ping node-appOCI runtime exec failed: exec failed: container_linux.go:348: starting container process caused "exec: \"ping\": executable file not found in $PATH": unknown
Furthermore, upon starting docker-compose, I get the error message: Server running... node-app | { MongoNetworkError: failed to connect to server [mongo:27017] on first connect [MongoNetworkError: connect ECONNREFUSED 172.21.0.3:27017]
Docker-compose
version: '3'
services:
app:
container_name: node-app
restart: always
build: .
ports:
- '80:3000'
networks:
- net
mongo:
container_name: mongo
image: mongo
restart: always
ports:
- 27017:27017
networks:
- net
networks:
net:
driver: bridge
Dockerfile
FROM node:10
WORKDIR /usr/src/app
COPY package*.json ./
RUN npm install
COPY . .
EXPOSE 35.158.153.133/80 # my aws public ip address
CMD ["npm", "start"]
index.js
mongoose
.connect(
'mongodb://mongo:27017/mongo',
{ useNewUrlParser: true }
)
.then(() => console.log('MongoDB Connected'))
.catch(err => console.log(err));
const Item = require('./models/Item');
app.get('/', (req, res) => {
Item.find()
.then(items => res.render('index', { items }))
.catch(err => res.status(404).json({ msg: 'No items found' }));
});
app.post('/item/add', (req, res) => {
const newItem = new Item({
name: req.body.name
});
newItem.save().then(item => res.redirect('/'));
});