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Docker is a tool for creating, running, and managing lightweight virtual machines. These virtual machines make it possible to distribute executable environments with all of the dependencies that can easily be run by others. These Docker images can then be stored and distributed on a Docker registryRegistry, a collection of these images. There are a number of open registries on the web, and Synapse hosts a private registry, freely available to our users, which will allow users to create software on a per project basis which that can be easily shared across Synapse. Learn more about Docker and Docker registry.
Registered Synapse users interact with the Synapse Docker registry using the standard Docker client. If you have not yet created a Synapse account, you must register for Synapse before you can use Docker.
In Synapse, Docker containers are represented as versioned ‘repositories’ under the ‘Docker’ Docker tab. As with Files files and Tablestables, repositories are organized by project and inherit the access permissions from the parent project. Local Sharing Settings can Local sharing settings can be applied directly to the repository if permissions should differ from the project.
Read more about local sharing settings in /wiki/spaces/DOCS/pages/2024276030.
To learn more about working with Docker using one of our programmatic clients, including code examples for the below tasks, see:
Docker in Python Docs.
Docker in R Docs.
Creating a
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New Docker
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Image
To create a custom Docker image. Users , you can choose to either modify an existing Docker image or build a Docker image from a Dockerfile. Docker images must be tagged with ‘docker.synapse.org/synapseProjectId/myreponame’myreponame to allow images to be saved.
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To tag an existing Docker image, users can use the IMAGE ID or the repo name. The IMAGE ID can be found by doing:
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Build your own image from a Dockerfile When
When building a Docker image from a Dockerfile, add a -t to the docker build command with the correct Synapse Docker registry tag.
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Learn more about building docker Docker images.
Storing Docker
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Images in the Synapse Docker
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Registry
To store Docker images, use the docker push command. To push to the Synapse Docker registry, users must be logged into the registry, be a Synapse certified user and have edit permissions:
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docker images #REPOSITORY TAG IMAGE ID CREATED SIZE #docker.synapse.org/syn12345/mytestrepo version1 f8d79ba03c00 6 days ago 126.4 MB #ubuntu latest f8d79ba03c00 6 days ago 126.4 MB #docker.synapse.org/syn12345/my-repo latest df323sdf123d 2 days ago 200.3 MB docker push docker.synapse.org/syn12345/mytestrepo:version1 docker push docker.synapse.org/syn12345/my-repo |
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Note: There is a 100GB limit per repository image layer. |
Note: An alternate way to log in, rather than using a user name and password, is with an OAuth access token. This method is unusual when using the Docker command line client, but it may occur when using a Docker client within a system that authenticates using the OAuth protocol. In this case the ‘user’ user field is ignored and the ‘password’ password field is interpreted as the access token. To perform docker pull operations the OAuth token must have download scope. To perform docker push operations the token must have download and modify scopes.
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docker login -u <anything> -p <access token> docker.synapse.org |
Using Docker
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Images Stored in the Synapse Docker
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Registry
To access the Docker images stored in Synapse, use the docker pull command. To pull from the Synapse Docker registry, users must be logged into the registry and have download permissions:
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Tip: By default, if you do not specify a tag, it will attach latest as the tag. If you specified a tag on your repository, be sure to pull the repository with the tag. |
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Docker tags can be assigned to later commits. If you want to be explicit about the version of an image then instead of referencing a tag you can reference a digest:
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docker login -u <synapse username> -p <synapse password> docker.synapse.org docker pull docker.synapse.org/syn12345/mytestrepo@sha256:2e36829f986351042e28242ae386913645a7b41b25844fb39b29af0bdf8dcb63 |
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To pull a container from a Synapse Docker repository, you must have download permissions in the sharing settings of the Synapse Docker repository. In Synapse, Docker repositories have names of the form: docker.synapse.org/syn123456syn12345678/repo-name, where syn123456 syn12345678 is the project ID. Navigate to syn123456 syn12345678 to check the project’s sharing settings. To push a new container to a Synapse Docker repository, you must be a Synapse certified user and have edit permissions. To push a change to an existing Synapse Docker repository, you must also have edit permissions. If the container is in the trash can, all operations will fail.Include Page