158 lines
6.3 KiB
Markdown
158 lines
6.3 KiB
Markdown
<!--[metadata]>
|
||
+++
|
||
title = "Build instructions"
|
||
description = "Explains how to build & hack on the registry"
|
||
keywords = ["registry, on-prem, images, tags, repository, distribution, build, recipe, advanced"]
|
||
+++
|
||
<![end-metadata]-->
|
||
|
||
# Building the registry source
|
||
|
||
## Use-case
|
||
|
||
This is useful if you intend to actively work on the registry.
|
||
|
||
### Alternatives
|
||
|
||
Most people should use the [official Registry docker image](https://hub.docker.com/r/library/registry/).
|
||
|
||
People looking for advanced operational use cases might consider rolling their own image with a custom Dockerfile inheriting `FROM registry:2`.
|
||
|
||
OS X users who want to run natively can do so following [the instructions here](osx-setup-guide.md).
|
||
|
||
### Gotchas
|
||
|
||
You are expected to know your way around with go & git.
|
||
|
||
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.
|
||
|
||
## Build the development environment
|
||
|
||
The first prerequisite of properly building distribution targets is to have a Go
|
||
development environment setup. Please follow [How to Write Go Code](https://golang.org/doc/code.html)
|
||
for proper setup. If done correctly, you should have a GOROOT and GOPATH set in the
|
||
environment.
|
||
|
||
If a Go development environment is setup, one can use `go get` to install the
|
||
`registry` command from the current latest:
|
||
|
||
go get github.com/docker/distribution/cmd/registry
|
||
|
||
The above will install the source repository into the `GOPATH`.
|
||
|
||
Now create the directory for the registry data (this might require you to set permissions properly)
|
||
|
||
mkdir -p /var/lib/registry
|
||
|
||
... or alternatively `export REGISTRY_STORAGE_FILESYSTEM_ROOTDIRECTORY=/somewhere` if you want to store data into another location.
|
||
|
||
The `registry`
|
||
binary can then be run with the following:
|
||
|
||
$ $GOPATH/bin/registry -version
|
||
$GOPATH/bin/registry github.com/docker/distribution v2.0.0-alpha.1+unknown
|
||
|
||
> __NOTE:__ While you do not need to use `go get` to checkout the distribution
|
||
> project, for these build instructions to work, the project must be checked
|
||
> out in the correct location in the `GOPATH`. This should almost always be
|
||
> `$GOPATH/src/github.com/docker/distribution`.
|
||
|
||
The registry can be run with the default config using the following
|
||
incantation:
|
||
|
||
$ $GOPATH/bin/registry $GOPATH/src/github.com/docker/distribution/cmd/registry/config-example.yml
|
||
INFO[0000] endpoint local-5003 disabled, skipping app.id=34bbec38-a91a-494a-9a3f-b72f9010081f version=v2.0.0-alpha.1+unknown
|
||
INFO[0000] endpoint local-8083 disabled, skipping app.id=34bbec38-a91a-494a-9a3f-b72f9010081f version=v2.0.0-alpha.1+unknown
|
||
INFO[0000] listening on :5000 app.id=34bbec38-a91a-494a-9a3f-b72f9010081f version=v2.0.0-alpha.1+unknown
|
||
INFO[0000] debug server listening localhost:5001
|
||
|
||
If it is working, one should see the above log messages.
|
||
|
||
### Repeatable Builds
|
||
|
||
For the full development experience, one should `cd` into
|
||
`$GOPATH/src/github.com/docker/distribution`. From there, the regular `go`
|
||
commands, such as `go test`, should work per package (please see
|
||
[Developing](#developing) if they don't work).
|
||
|
||
A `Makefile` has been provided as a convenience to support repeatable builds.
|
||
Please install the following into `GOPATH` for it to work:
|
||
|
||
go get github.com/tools/godep github.com/golang/lint/golint
|
||
|
||
**TODO(stevvooe):** Add a `make setup` command to Makefile to run this. Have to think about how to interact with Godeps properly.
|
||
|
||
Once these commands are available in the `GOPATH`, run `make` to get a full
|
||
build:
|
||
|
||
$ GOPATH=`godep path`:$GOPATH make
|
||
+ clean
|
||
+ fmt
|
||
+ vet
|
||
+ lint
|
||
+ build
|
||
github.com/docker/docker/vendor/src/code.google.com/p/go/src/pkg/archive/tar
|
||
github.com/Sirupsen/logrus
|
||
github.com/docker/libtrust
|
||
...
|
||
github.com/yvasiyarov/gorelic
|
||
github.com/docker/distribution/registry/handlers
|
||
github.com/docker/distribution/cmd/registry
|
||
+ test
|
||
...
|
||
ok github.com/docker/distribution/digest 7.875s
|
||
ok github.com/docker/distribution/manifest 0.028s
|
||
ok github.com/docker/distribution/notifications 17.322s
|
||
? github.com/docker/distribution/registry [no test files]
|
||
ok github.com/docker/distribution/registry/api/v2 0.101s
|
||
? github.com/docker/distribution/registry/auth [no test files]
|
||
ok github.com/docker/distribution/registry/auth/silly 0.011s
|
||
...
|
||
+ /Users/sday/go/src/github.com/docker/distribution/bin/registry
|
||
+ /Users/sday/go/src/github.com/docker/distribution/bin/registry-api-descriptor-template
|
||
+ binaries
|
||
|
||
The above provides a repeatable build using the contents of the vendored
|
||
Godeps directory. This includes formatting, vetting, linting, building,
|
||
testing and generating tagged binaries. We can verify this worked by running
|
||
the registry binary generated in the "./bin" directory:
|
||
|
||
$ ./bin/registry -version
|
||
./bin/registry github.com/docker/distribution v2.0.0-alpha.2-80-g16d8b2c.m
|
||
|
||
### Developing
|
||
|
||
The above approaches are helpful for small experimentation. If more complex
|
||
tasks are at hand, it is recommended to employ the full power of `godep`.
|
||
|
||
The Makefile is designed to have its `GOPATH` defined externally. This allows
|
||
one to experiment with various development environment setups. This is
|
||
primarily useful when testing upstream bugfixes, by modifying local code. This
|
||
can be demonstrated using `godep` to migrate the `GOPATH` to use the specified
|
||
dependencies. The `GOPATH` can be migrated to the current package versions
|
||
declared in `Godeps` with the following command:
|
||
|
||
godep restore
|
||
|
||
> **WARNING:** This command will checkout versions of the code specified in
|
||
> Godeps/Godeps.json, modifying the contents of `GOPATH`. If this is
|
||
> undesired, it is recommended to create a workspace devoted to work on the
|
||
> _Distribution_ project.
|
||
|
||
With a successful run of the above command, one can now use `make` without
|
||
specifying the `GOPATH`:
|
||
|
||
make
|
||
|
||
If that is successful, standard `go` commands, such as `go test` should work,
|
||
per package, without issue.
|
||
|
||
### Optional build tags
|
||
|
||
Optional [build tags](http://golang.org/pkg/go/build/) can be provided using
|
||
the environment variable `DOCKER_BUILDTAGS`.
|
||
|
||
To enable the [Ceph RADOS storage driver](storage-drivers/rados.md)
|
||
(librados-dev and librbd-dev will be required to build the bindings):
|
||
|
||
export DOCKER_BUILDTAGS='include_rados'
|