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Creating and Using a Docker Image Stored in an OVHcloud Managed Private Registry (Harbor)

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Stephanie R.
  • Updated

Learn how to create a Docker image, store it in the OVHcloud Managed Private Registry service, and use it from a Docker client.

OVHcloud Managed Private Registry service provides a managed, authenticated Docker registry where you can privately store your Docker images.

 

Requirements

 

Instructions

Get your OVHcloud Managed Private Registry API URL

From the OVHcloud Control Panel:

  1. Select Public Cloud in the top navigation bar.
  2. Select your project.
  3. In the left-hand navigation menu, under Containers & Orchestration, click Managed Private Registry.
  4. Select the more options ... button at the right of your registry and click Harbor API.

MPR_usedockerimage01***.png

Copy the URL of the API Harbor, it's the URL of your private registry and we are going to use it several times in this guide.

MPR_usedockerimage02*.png

In fact, when you click the copy button as indicated by a hand icon in the image, the copied string starts with https://. Please remove the https:// part.

 

Creating a Docker image

You're going to create a Docker image using a very simple Dockerfile and some resource files.

Create a hello-ovh/ folder in a known location and inside create:

  • A Dockerfile file:
FROM nginx:1.15-alpine

COPY index.html /usr/share/nginx/html/index.html
COPY ovh.svg /usr/share/nginx/html/ovh.svg
  • A index.html file:
<!doctype html>
<html>
  <head>
    <title>OVHcloud K8S</title>
    <style>
      .title {
      font-size: 3em;
      padding: 2em;
      text-align: center;
      }
    </style>
  </head>
  <body>
    <div class="title">
      <p>Hello from Private Registry!</p>
      <img src="./ovh.svg">
    </div>
  </body>
</html>

  • A ovh.svg file (right click and save it):

    blobid0.dat

You should have these files in your hello-ovh directory:

├── Dockerfile
├── index.html
└── ovh.svg
  • Go into the hello-ovh folder, containing the three files, and do a docker build. You will need to tag your build using your private registry URL, the project within the registry (private if you followed the managing users and projects guide), and the image name (hello-ovh):
docker build --tag [YOUR_PRIVATE_REGISTRY_URL]/[YOUR_PROJECT]/hello-ovh:1.0.0 .

Here is the result of running the command for my private registry in the private project:

$ docker build --tag 8093ff7x.c1.va1.container-registry.ovh.us/private/hello-ovh:1.0.0 .
Sending build context to Docker daemon  14.34kB
Step 1/3 : FROM nginx:1.15-alpine
1.15-alpine: Pulling from library/nginx
e7c96db7181b: Pull complete 
264026bbe255: Pull complete 
a71634c55d29: Pull complete 
5595887beb81: Pull complete 
Digest: sha256:57a226fb6ab6823027c0704a9346a890ffb0cacde06bc19bbc234c8720673555
Status: Downloaded newer image for nginx:1.15-alpine
---> dd025cdfe837
Step 2/3 : COPY index.html /usr/share/nginx/html/index.html
---> f1f2487532bc
Step 3/3 : COPY ovh.svg /usr/share/nginx/html/ovh.svg
---> 3f803b45da18
Successfully built 3f803b45da18
Successfully tagged 8093ff7x.c1.va1.container-registry.ovh.us/private/hello-ovh:1.0.0
  • Login to your private registry, using a user with write rights to the project (private-user if you followed the managing users and projects guide)
docker login [YOUR_PRIVATE_REGISTRY_URL]

In my private registry:

$ docker login 8093ff7x.c1.va1.container-registry.ovh.us
Username: private-user
Password: 
Login Succeeded
  • Upload the image to the private registry
docker push [YOUR_PRIVATE_REGISTRY_URL]/[YOUR_PROJECT]/hello-ovh:1.0.0

In my private registry example:

$ docker push 8093ff7x.c1.va1.container-registry.ovh.us/private/hello-ovh:1.0.0
The push refers to repository [8093ff7x.c1.va1.container-registry.ovh.us/private/hello-ovh]
369ed87ef8b1: Pushed 
d2220a0eb85b: Pushed 
a521e1bbddf5: Pushed 
bf381a670956: Pushed 
a61993362baf: Pushed 
f1b5933fe4b5: Pushed 
1.0.0: digest: sha256:f5a6a8f0d7c95cf3926b504a7949c8575e478106b59d8913ab947729aa5bd075 size: 1568

 

If you go to your Harbor UI, you will see a hello-ovh repository in the private project:

usedockerimage04.png

 

This repository will store all the versions of the hello-ovh image (right now only the 1.0.0):

usedockerimage05.png

 

Deploy the private image

Now you can use docker pull (preceded by a docker login on your private registry if you're doing it from a different computer) to deploy the image from the OVHcloud Managed Private Registry.

docker pull [YOUR_PRIVATE_REGISTRY_URL]/[YOUR_PROJECT]/hello-ovh:1.0.0

In my private registry example:

$ docker pull 8093ff7x.c1.va1.container-registry.ovh.us/private/hello-ovh:1.0.0
1.0.0: Pulling from private/hello-ovh
e7c96db7181b: Already exists 
264026bbe255: Already exists 
a71634c55d29: Already exists 
5595887beb81: Already exists 
4c1b9819c67d: Pull complete 
5df2876c6416: Pull complete 
Digest: sha256:f5a6a8f0d7c95cf3926b504a7949c8575e478106b59d8913ab947729aa5bd075
Status: Downloaded newer image for 8093ff7x.c1.va1.container-registry.ovh.us/private/hello-ovh:1.0.0

And then you can run it:

docker run -d -p 80:80 [YOUR_PRIVATE_REGISTRY_URL]/[YOUR_PROJECT]/hello-ovh:1.0.0

In my private registry example:

$ docker run -d -p 8080:80 8093ff7x.c1.va1.container-registry.ovh.us/private/hello-ovh:1.0.0
c18f071c3c8c10ca636ed9be84878c12f3a270b6def131eb756f69435b978da1

And now you can test it with the curl command:

$ curl localhost:8080
<!doctype html>

<html>
<head>
<title>OVH K8S</title>
</head>
<style>
.title {
font-size: 3em;
padding: 2em;
text-align: center;
}
</style>
<body>
<div class="title">
<pHello from Private Registry!</p>
<img src="./ovh.svg">
</div>
</body>
</html>

Or in your browser:

NOTE: You need to enter localhost:8080 in your browser's address bar.

usedockerimage06.jpg

 

Go further

For more information and tutorials, please see our other Managed Private Registry support guides or explore the guides for other OVHcloud products and services.

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