1d33874951
Go 1.13 and up enforce import paths to be versioned if a project contains a go.mod and has released v2 or up. The current v2.x branches (and releases) do not yet have a go.mod, and therefore are still allowed to be imported with a non-versioned import path (go modules add a `+incompatible` annotation in that case). However, now that this project has a `go.mod` file, incompatible import paths will not be accepted by go modules, and attempting to use code from this repository will fail. This patch uses `v3` for the import-paths (not `v2`), because changing import paths itself is a breaking change, which means that the next release should increment the "major" version to comply with SemVer (as go modules dictate). Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
118 lines
4.8 KiB
Markdown
118 lines
4.8 KiB
Markdown
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# Building the registry source
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## Use-case
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This is useful if you intend to actively work on the registry.
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### Alternatives
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Most people should use the [official Registry docker image](https://hub.docker.com/r/library/registry/).
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People looking for advanced operational use cases might consider rolling their own image with a custom Dockerfile inheriting `FROM registry:2`.
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OS X users who want to run natively can do so following [the instructions here](https://github.com/docker/docker.github.io/blob/master/registry/recipes/osx-setup-guide.md).
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### Gotchas
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You are expected to know your way around with go & git.
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If you are a casual user with no development experience, and no preliminary knowledge of go, building from source is probably not a good solution for you.
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## Build the development environment
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The first prerequisite of properly building distribution targets is to have a Go
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development environment setup. Please follow [How to Write Go Code](https://golang.org/doc/code.html)
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for proper setup. If done correctly, you should have a GOROOT and GOPATH set in the
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environment.
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If a Go development environment is setup, one can use `go get` to install the
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`registry` command from the current latest:
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go get github.com/distribution/distribution/cmd/registry
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The above will install the source repository into the `GOPATH`.
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Now create the directory for the registry data (this might require you to set permissions properly)
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mkdir -p /var/lib/registry
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... or alternatively `export REGISTRY_STORAGE_FILESYSTEM_ROOTDIRECTORY=/somewhere` if you want to store data into another location.
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The `registry`
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binary can then be run with the following:
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$ $GOPATH/bin/registry --version
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$GOPATH/bin/registry github.com/distribution/distribution v2.0.0-alpha.1+unknown
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> __NOTE:__ While you do not need to use `go get` to checkout the distribution
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> project, for these build instructions to work, the project must be checked
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> out in the correct location in the `GOPATH`. This should almost always be
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> `$GOPATH/src/github.com/distribution/distribution`.
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The registry can be run with the default config using the following
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incantation:
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$ $GOPATH/bin/registry serve $GOPATH/src/github.com/distribution/distribution/cmd/registry/config-example.yml
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INFO[0000] endpoint local-5003 disabled, skipping app.id=34bbec38-a91a-494a-9a3f-b72f9010081f version=v2.0.0-alpha.1+unknown
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INFO[0000] endpoint local-8083 disabled, skipping app.id=34bbec38-a91a-494a-9a3f-b72f9010081f version=v2.0.0-alpha.1+unknown
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INFO[0000] listening on :5000 app.id=34bbec38-a91a-494a-9a3f-b72f9010081f version=v2.0.0-alpha.1+unknown
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INFO[0000] debug server listening localhost:5001
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If it is working, one should see the above log messages.
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### Repeatable Builds
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For the full development experience, one should `cd` into
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`$GOPATH/src/github.com/distribution/distribution`. From there, the regular `go`
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commands, such as `go test`, should work per package (please see
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[Developing](#developing) if they don't work).
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A `Makefile` has been provided as a convenience to support repeatable builds.
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Please install the following into `GOPATH` for it to work:
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go get github.com/golang/lint/golint
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Once these commands are available in the `GOPATH`, run `make` to get a full
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build:
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$ make
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+ clean
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+ fmt
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+ vet
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+ lint
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+ build
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github.com/docker/docker/vendor/src/code.google.com/p/go/src/pkg/archive/tar
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github.com/sirupsen/logrus
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github.com/docker/libtrust
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...
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github.com/yvasiyarov/gorelic
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github.com/distribution/distribution/registry/handlers
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github.com/distribution/distribution/cmd/registry
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+ test
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...
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ok github.com/distribution/distribution/digest 7.875s
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ok github.com/distribution/distribution/manifest 0.028s
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ok github.com/distribution/distribution/notifications 17.322s
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? github.com/distribution/distribution/registry [no test files]
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ok github.com/distribution/distribution/registry/api/v2 0.101s
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? github.com/distribution/distribution/registry/auth [no test files]
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ok github.com/distribution/distribution/registry/auth/silly 0.011s
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...
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+ /Users/sday/go/src/github.com/distribution/distribution/bin/registry
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+ /Users/sday/go/src/github.com/distribution/distribution/bin/registry-api-descriptor-template
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+ binaries
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The above provides a repeatable build using the contents of the vendor
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directory. This includes formatting, vetting, linting, building,
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testing and generating tagged binaries. We can verify this worked by running
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the registry binary generated in the "./bin" directory:
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$ ./bin/registry --version
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./bin/registry github.com/distribution/distribution v2.0.0-alpha.2-80-g16d8b2c.m
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### Optional build tags
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Optional [build tags](http://golang.org/pkg/go/build/) can be provided using
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the environment variable `DOCKER_BUILDTAGS`.
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