Author:
Docker Compose
and it's application⚓︎
We have already touched Docker Compose
from Guidance. Now it is time to do some advance behaviors based on Docker Compose
!
Docker Compose
is a way to handle more than oneDocKer Container
. That is setting communiation betweenDocKer Container
s. In this section, we will iterate all the situation between Server and Host combination to finally reach the goal ofDocKer Container
communications.
Assume our mock server looks like this:
mockapi.js
const express = require('express')
const app = express()
const port = 3000
var path = require('path')
var bodyParser = require('body-parser')
app.use(express.static(path.join(__dirname, 'build')));
var WeatherDataController = require('./REST_API/weather');
app.get('/data/2.5/weather', WeatherDataController.getData);//
//app.get('/data/2.5/weather', (req, res) => {
// res.json({"coord":{"lon":123.262,"lat":44.5646},"weather":[{"id":801,"main":"Clouds","description":"few clouds","icon":"02d"}],"base":"stations","main":{"temp":285.23,"feels_like":284.95,"temp_min":285.23,"temp_max":285.23,"pressure":1014,"humidity":94,"sea_level":1014,"grnd_level":997},"visibility":10000,"wind":{"speed":3.41,"deg":190,"gust":9.72},"clouds":{"all":18},"dt":1664661306,"sys":{"country":"CN","sunrise":1664660711,"sunset":1664702853},"timezone":28800,"id":2036338,"name":"Kaitong","cod":200})
//})
app.listen(port, () => {
console.log(`Example app listening on port ${port}`)
})
1. Server and client in the same Docker container⚓︎
S_d&C_d.yml
services:
server:
image: "swiftlang/swift:nightly-focal" #simpli_image
volumes:
- "C:/CS561_WEEK8:/code"
environment:
- USER=ytl_5
command: bash -c "apt-get update && apt-get install -y nodejs && node /code/myapp/app.js"
Bash
#Host:
docker-compose run --rm --name myserver server
#Docker:
curl localhost:3000/data/2.5/Weather
2. Server in Docker container, client on host⚓︎
S_d&C_h.yml
services:
server:
image: "swiftlang/swift:nightly-focal" #simpli_image
volumes:
- "C:/CS561_WEEK8:/code"
environment:
- USER=ytl_5
command: bash -c "apt-get update && apt-get install -y nodejs && node /code/myapp/app.js"
ports:
-"3000:3000"
Bash
#Host:
docker-compose run --rm --service-ports server
#Host:
curl localhost:3000/data/2.5/Weather
3. Server on host, client in Docker container⚓︎
S_h&C_d.yml
services:
client:
image: "swiftlang/swift:nightly-focal" #simpli_image
volumes:
- "C:/CS561_WEEK8:/code"
environment:
- USER=ytl_5
command: bash -c "apt-get update && apt-get install -y nodejs && node /code/myapp/app.js"
Bash
#Host:
docker-compose run --rm client
#Docker Container:
curl host.docker.internal:3000/data/2.5/weather
4. Server in Docker container, client in another Docker container⚓︎
S_d&C_another_d.yml
services:
server:
image: "swiftlang/swift:nightly-focal"
volumes:
- "C:/CS561_WEEK8:/code"
environment:
- USER=ytl_5
command: bash -c "apt-get update && apt-get install -y nodejs && node /code/myapp/app.js"
client:
image: "swiftlang/swift:nightly-focal"
volumes:
- "C:/CS561_WEEK8:/code"
- USER=ytl_5
Bash
#Host:
docker-compose run --rm --name myserver server
docker inspect myserver | grep IPAddress
docker-compose run --rm --name myclient client
docker inspect myclient | grep IPAddress
#Docker Container:
curl <server ip address>:3000/data/2.5/weather
Last update:
December 4, 2022 05:57:23
Created: November 12, 2022 08:13:32
Created: November 12, 2022 08:13:32