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Installing client-go

For the casual user

If you want to write a simple script, don't care about a reproducible client library install, don't mind getting HEAD (which may be less stable than a particular release), then simply:

go get k8s.io/client-go@master

This will record a dependency on k8s.io/client-go in your go module. You can now import and use the k8s.io/client-go APIs in your project. The next time you go build, go test, or go run your project, k8s.io/client-go and its dependencies will be downloaded (if needed), and detailed dependency version info will be added to your go.mod file (or you can also run go mod tidy to do this directly).

This assumes you are using go modules with go 1.11+. If you get a message like cannot use path@version syntax in GOPATH mode, see the instructions for enabling go modules.

Dependency management for the serious (or reluctant) user

Reasons why you might need to use a dependency management system:

  • You use a dependency that client-go also uses, and don't want two copies of the dependency compiled into your application. For some dependencies with singletons or global inits (e.g. glog) this wouldn't even compile...
  • You want to lock in a particular version (so you don't have to change your code every time we change a public interface).
  • You want your install to be reproducible. For example, for your CI system or for new team members.

Enabling go modules

Dependency management tools are built into go 1.11+ in the form of go modules. These are used by the main Kubernetes repo (>= v1.15.0) and client-go (>= kubernetes-1.15.0) to manage dependencies. If you are using go 1.11 or 1.12 and are working with a project located within $GOPATH, you must opt into using go modules:

export GO111MODULE=on

Ensure your project has a go.mod file defined at the root of your project. If you do not already have one, go mod init will create one for you:

go mod init

Add client-go as a dependency

Indicate which version of client-go your project requires (replace kubernetes-1.15.0 with the desired version):

go get k8s.io/client-go@kubernetes-1.15.0

You can now import and use the k8s.io/client-go APIs in your project. The next time you go build, go test, or go run your project, k8s.io/client-go and its dependencies will be downloaded (if needed), and detailed dependency version info will be added to your go.mod file (or you can also run go mod tidy to do this directly).

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