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3. Storing the container image in a container registry

3.1. Push the container image to DockerHub

Now that you have your application containerized, you can store it in a container registry such as dockerhub. Storing static container images in container registry is required to deploy application on a remote kubernetes cluster.

  • Login to docker by running the following command:
docker login
  • You will see output similar to the following:
Login with your Docker ID to push and pull images from Docker Hub. If you don't have a Docker ID, head over to https://hub.docker.com to create one.
Username: manojjahgirdar
Password:
Login Succeeded
  • Rename the container image in the format username/imagename:tag by running the following command:
docker tag sample-app:v1.0 <username>/sample-app:v1.0
  • Push the image to docker hub by running the following command:
docker push <username>/sample-app:v1.0

  • You will see output similar to the following:

    Python Flask Output
    The push refers to repository [docker.io/manojjahgirdar/sample-app]
c51c5d086047: Pushed
c37b64c6b724: Pushed
af602c0dc044: Pushed
a765872192e3: Mounted from library/python
a6dfc8291750: Mounted from library/python
7e46f0272529: Mounted from library/python
5359ff267161: Mounted from library/python
2edcec3590a4: Mounted from library/python
1.0: digest: sha256:db6ad330c4d5e5df3728b4b3123129e9a0449f0becba21a7b681f8f773d7ba38 size: 1999

    NodeJs Express Output
    The push refers to repository [docker.io/manojjahgirdar/sample-app]
166293c07cb0: Pushed
c01bf11fccb2: Pushed
56034ba0dab4: Pushed
70b4fdd67645: Mounted from library/node
b77fe0f00494: Mounted from library/node
9b5ca33009b8: Mounted from library/node
75b4edf780e2: Mounted from library/node
126712f9d0fb: Mounted from library/node
330a6fb3364f: Mounted from library/node
b20560b6a21c: Mounted from library/node
a1215953fc64: Mounted from library/node
b14cb48b3aeb: Mounted from library/node
v1.0: digest: sha256:e15a8a285030922451616efb88bb2362a302fcbd4f9032e080534f464fde343b size: 2841

  • You can check the image in https://hub.docker.com

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