Codegazers / colors

Options for better usage

• Environment variables:
  • COLOR - Defines color
  • HOSTNAME - Defines an alternate hostname
  • APPROOT - Defines application root url (for example APPROOT=/colors will construct /colors/text for example)
  • REDIS_ENABLED - Currently in construction

Building

	git clone https://github.com/frjaraur/colors.git

	docker build -t codegazers/colors:VERSION .

	docker build -t frjaraur/colors:VERSION .

Simple Usage (Random):

docker service create --name colors \
	--publish target=3000,published=8000 \
	frjaraur/colors:VERSION

To access pages just curl on service port. For text version use

	curl http://localhost:8000/text

For health check use

	curl http://localhost:8000/health

We can include '/tmp/down' inside container to set 'down' app status.

Headers will change status too (AppStatus will change from UP to DOWN).

$ curl -vvv 0.0.0.0:8000/health
*   Trying 0.0.0.0...
* Connected to 0.0.0.0 (127.0.0.1) port 8000 (#0)
> GET /health HTTP/1.1
> Host: 0.0.0.0:8000
> User-Agent: curl/7.47.0
> Accept: */*
> 
< HTTP/1.1 200 OK
< Content-Type: text/plain; charset=UTF-8
< AppStatus: DOWN
< Date: Thu, 06 Sep 2018 15:38:46 GMT
< Connection: keep-alive
< Transfer-Encoding: chunked
< 
I am DOWN, thanks for asking
* Connection #0 to host 0.0.0.0 left intact

docker run -ti -e COLOR=white  \
-p 8080:3000  codegazers/colors:1.19

Docker EE Interlock Demo

version: "3.3"
# A Docker Compose file for configuration of the development environment

services:
  red:
    image: frjaraur/colors:1.4
    environment:
      - COLOR=red
    deploy:
     replicas: 1
     labels:
        com.docker.lb.hosts: red.example.com
        com.docker.lb.network: colors
        com.docker.lb.port: 3000
    networks:
      - colors


  blue:
    image: frjaraur/colors:1.4
    environment:
      - COLOR=blue
    deploy:
     replicas: 1
     labels:
        com.docker.lb.hosts: blue.example.com
        com.docker.lb.network: colors
        com.docker.lb.port: 3000
    networks:
      - colors

networks:
  colors:

We then use

$ curl -vvv -H "host: blue.example.com" http://<YOUR_UCP_FQDN>:<YOUR_UCP_INTERLOCK_HTTP_PORT>