Lab #6: push Command

The docker-compose push command help you tou push the service images to Docker Hub or your own private Docker registry.

Pre-requisite:

Tested Infrastructure

<table class="tg"> <tr> <th class="tg-yw4l">Platform</th> <th class="tg-yw4l">Number of Instance</th> <th class="tg-yw4l">Reading Time</th> </tr> <tr> <td class="tg-yw4l"> Play with Docker</td> <td class="tg-yw4l">1</td> <td class="tg-yw4l">5 min</td> </tr> </table>

Pre-requisite

Create an account with DockerHub
Open PWD Platform on your browser
Click on Add New Instance on the left side of the screen to bring up Alpine OS instance on the right side

Assignment

Dockerfile for custom docker image
Create a docker-compose.yml file
Build the image using docker-compose
Upload the image to Docker registry

Dockerfile for custom docker image

$ mkdir -p dockerlabs/{nginx,httpd} ; cd dockerlabs

Dockerfile_nginx

$ echo 'FROM nginx:alpine
RUN echo "nginx - Welcome to Docker Workshop!" >/usr/share/nginx/html/index.html
CMD ["nginx", "-g", "daemon off;"] ' > nginx/Dockerfile_nginx

Dockerfile_httpd

$ echo 'FROM httpd:alpine
RUN echo "httpd - Welcome to Docker Workshop!" > /usr/local/apache2/htdocs/index.html
CMD ["/usr/sbin/httpd", "-D", "FOREGROUND"] ' > httpd/Dockerfile_httpd

Create a docker-compose.yml file

docker-compose.yml

version: "3.7"
services:
  customNginx:
    build:
      context: .
      dockerfile: nginx/Dockerfile_nginx
    image: saviovettoor/custom_nginx_dockerlabs:v1
  customHttpd:
    build:
      context: .
      dockerfile: httpd/Dockerfile_httpd
    image: saviovettoor/custom_httpd_dockerlabs:v1

NOTE: Make sure that image name should be <USER_NAME> / <REPOSITORY>.

Build the image using docker-compose

$ docker-compose build

Check the image have created

$ docker image ls
REPOSITORY                             TAG                 IMAGE ID            CREATED             SIZE
saviovettoor/custom_nginx_dockerlabs   v1                  3098d9cb3971        3 minutes ago       21.2MB
saviovettoor/custom_httpd_dockerlabs   v1                  866e070c373a        3 minutes ago       127MB

Upload the image to Docker registry

NOTE: before tryng to push the image log in to hub.

$ docker login -u <USER_NAME>

$ docker-compose push

Upload a single service image

$ docker-compose push customNginx
Pushing customNginx (saviovettoor/custom_nginx_dockerlabs:v1)...
The push refers to repository [docker.io/saviovettoor/custom_nginx_dockerlabs]
e4f534d7f270: Pushed
3e76d2df1790: Mounted from library/nginx
03901b4a2ea8: Mounted from library/nginx
v1: digest: sha256:aa83133b840728922ad95133ff17ed95fed7d3fb89e9919925a874cf848cd282 size: 946

Contributor

Savio Mathew

Next » Lab #7: up Command