This page describes how to push and pull images, which is two of the most common tasks done with Container Registry. To push a new image to Container Registry, you need to first tag it with the registry name, as described below.
To get up and running with Container Registry, see the quickstart.
For instructions on listing, tagging, and deleting images, see Managing Images.
Before you begin
Make sure that you:
Installed the most recent version of the Cloud SDK, which includes the
Have access to the registries which you will be pushing to and pulling from
Configured Docker to use
gcloudas a credential helper, or are using another authentication method. To use
gcloudas the crediential helper, run the command:
gcloud auth configure-docker
Pushing an image to a registry
To push any local image to Container Registry, you need to first tag it with the registry name and then push the image.
Tag the local image with the registry name
Determine the registry name:
Choose a hostname, which specifies the region of the registry's storage. This region is not your location, but the location where the images will be stored. For example, if you are in Australia, you may want to use the host in Asia.
The four options are:
gcr.iohosts the images in the United States, but the location may change in the future
us.gcr.iohosts the image in the United States, in a separate storage bucket from images hosted by
eu.gcr.iohosts the images in the European Union
asia.gcr.iohosts the images in Asia
In the console, the images' hostname will be listed under Location.
Choose an image name, which can be different from the image's name on your local machine.
Combine the hostname, your Google Cloud Platform Console project ID, and image name:
See Domain-scoped projects for how to work with projects IDs that include a domain.
Tag the local image with the registry name by using the command:
docker tag [SOURCE_IMAGE] [HOSTNAME]/[PROJECT-ID]/[IMAGE]
[SOURCE_IMAGE]is the local image name.
This command names the image with the registry name and applies the tag
latest. If you want to apply a different tag, then use the command:
docker tag [SOURCE_IMAGE] [HOSTNAME]/[PROJECT-ID]/[IMAGE]:[TAG]
Push the tagged image to Container Registry
Push the tagged image to Container Registry by using the command:
docker push [HOSTNAME]/[PROJECT-ID]/[IMAGE]
This command pushes the image that has the tag
latest. If you want to
push an image that has a different tag, the use the command:
docker push [HOSTNAME]/[PROJECT-ID]/[IMAGE]:[TAG]
When you push an image to a registry with a new hostname, Container Registry creates a storage bucket in the specified multi-regional location. After pushing your image, you can:
Go to the GCP Console to view the registry and image.
gcloud container images list-tagsto view the image's tag(s) and automatically-generated digest:
gcloud container images list-tags [HOSTNAME]/[PROJECT-ID]/[IMAGE]
The command's output is similar to the following:
DIGEST TAGS TIMESTAMP 44bde... test 2017-..-..
Pulling images from a registry
To pull from Container Registry, use the command:
docker pull [HOSTNAME]/[PROJECT-ID]/[IMAGE]:[TAG]
docker pull [HOSTNAME]/[PROJECT-ID]/[IMAGE]@[IMAGE_DIGEST]
[HOSTNAME]is listed under Location in the console. It's one of four options:
[PROJECT-ID]is your Google Cloud Platform Console project ID). See Domain-scoped projects for how to work with projects IDs that include a domain.
[IMAGE]is the image's name in Container Registry.
[TAG]is the tag applied to the image. In a registry, tags are unique to an image.
[IMAGE_DIGEST]is the sha256 hash value of the image contents. In the console, click on the specific image to see its metadata. The digest is listed as the Image digest.
To get the pull command for a specific image:
Click on the name of an image to go to the specific registry.
In the registry, check the box next to the version of the image that you want to pull.
Click SHOW PULL COMMAND on the top of the page.
Copy the pull command, which identifies the image using either the tag or the digest.
- Learn about managing your images, including adding or removing tags and deleting images.
- Learn about configuring access control.
- Read more about Container Registry's components and features.