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https://github.com/rahul-dhar-e5609/scaling-web-app

A repository for learning how to scale a web application, concentrates over using docker containers over a bridge network for application instances that are being load balanced using the Round Robin algorithm. The application instances interact with a data service and a logging service that run in their separate containers.
https://github.com/rahul-dhar-e5609/scaling-web-app

container docker dockerfile go golang load-balancer microservice

Last synced: 8 days ago
JSON representation

Host: GitHub
URL: https://github.com/rahul-dhar-e5609/scaling-web-app
Owner: rahul-dhar-e5609
Created: 2019-04-30T17:31:44.000Z (over 5 years ago)
Default Branch: master
Last Pushed: 2019-05-25T20:24:01.000Z (over 5 years ago)
Last Synced: 2024-10-31T10:44:04.452Z (about 2 months ago)
Topics: container, docker, dockerfile, go, golang, load-balancer, microservice
Language: Go
Homepage:
Size: 43 KB
Stars: 2
Watchers: 3
Forks: 0
Open Issues: 0
Metadata Files:
- Readme: README.md

Awesome Lists containing this project

README

# Scaling a web app

## Installation
### Create subnet
> Subnet makes service discovery easier, as all the microservices are gonna run on this subnet, and it will be easier to manually assign ip addresses.
- `docker network create --subnet=172.18.0.0/16 scalenet`

### Building image for the dataservice
- `docker build -f .docker/dataservice.dockerfile -t scale/dataservice .`

### Building image for the loadbalancer
- `docker build -f .docker/loadbalancer.dockerfile -t scale/loadbalancer .`

### Building image for cache service
- `docker build -f .docker/cacheservice.dockerfile -t scale/cacheservice .`

### Building image for log service
- `docker build -f .docker/logservice.dockerfile -t scale/logservice .`

### Building image for web backend
- `docker build -f .docker/web.dockerfile -t scale/web .`

### Create containers
- Containers:
```
docker run --name dataservice --ip=172.18.0.10 --net=scalenet -p 4000:4000 --rm -it -d scale/dataservice
docker run --name loadbalancer --ip=172.18.0.12 --net=scalenet -p 2000:2000 --rm -it -d scale/loadbalancer
docker run --name cacheservice --ip=172.18.0.13 --net=scalenet -p 5000:5000 --rm -it scale/cacheservice
docker run --name logservice --ip=172.18.0.14 --net=scalenet -p 6000:6000 --rm -it -v /Users/rahuldhar/log:/log scale/logservice
docker run --net=scalenet --ip=172.18.0.2 -p3000:3000 --name webtest --rm -it scale/web --dataservice=https://172.18.0.10:4000 --loadbalancer=https://172.18.0.12:2001 --cachingservice=https://172.18.0.13:5000 --logservice=https://172.18.0.14:6000
```
- Check that both the containers are up and running using the below-mentioned commands:
```
docker ps
docker network inspect scalenet
```
> The docker network inspect command should show both the containers in the Containers object of the configuration, see the eg below
- An output for docker network inspect scalenet
```
Rahuls-MacBook-Pro:scaling-web-app rahuldhar$ docker network inspect scalenet
[
{
"Name": "scalenet",
"Id": "01f8a6ee533b66b0775b4ad6fb99c825dbafd8aba963459d00fb835940ae9eab",
"Created": "2019-04-30T19:45:53.380381186Z",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": {},
"Config": [
{
"Subnet": "172.18.0.0/16",
"Gateway": "172.18.0.1"
}
]
},
"Internal": false,
"Attachable": false,
"Ingress": false,
"ConfigFrom": {
"Network": ""
},
"ConfigOnly": false,
"Containers": {
"a7c1fe39219c3eb41f69ef6965dd8b0911eb69067cc22e8171e30958f47d1cf5": {
"Name": "dataservice",
"EndpointID": "e3696f2c570ac122526c94e82fe258faa58d58a2f669e513b3c433c8f2b81df2",
"MacAddress": "02:42:ac:12:00:0a",
"IPv4Address": "172.18.0.10/16",
"IPv6Address": ""
},
"c7bffd2989d8534671005e43f23b9ad45fc2d67d351a6828c12a049bfceacc6d": {
"Name": "webtest",
"EndpointID": "000995e02495a6ea1455588af0747a9423bafba6761dddffd7f31513eab1c571",
"MacAddress": "02:42:ac:12:00:02",
"IPv4Address": "172.18.0.2/16",
"IPv6Address": ""
},
"f402bfa13e2491a5de1e08af880c80a59ffd2c4919400cf9c9a841f17202925c": {
"Name": "loadbalancer",
"EndpointID": "b8d56b9813d55ddcac5a12853ccd14ba2b911b4c8609537519b1c56d85904f9e",
"MacAddress": "02:42:ac:12:00:0c",
"IPv4Address": "172.18.0.12/16",
"IPv6Address": ""
}
},
"Options": {},
"Labels": {}
}
]
```