Skipper is an HTTP router built on top of a reverse proxy with the ability to modify requests and responses with filters. You can use it out of the box or add your own custom filters and predicates.
What Skipper Does
- identifies routes based on the requests' properties, such as path, method, host and headers
- routes each request to the configured server endpoint
- allows modification of requests and responds with filters that are independently configured for each route
- optionally acts as a final endpoint (shunt)
- updates the routing rules without restarting, while supporting multiple types of data sources — including etcd, Innkeeper and static files
Skipper provides a default executable command with a few built-in filters, however, its primary use case is to be extended with custom filters, predicates or data sources. See more in the Documentation
Skipper's design is largely inspired by Vulcand.
In order to build and run Skipper, only the latest version of Go needs to be installed.
Skipper can use Innkeeper or Etcd as data sources for routes. See more details in the Documentation.
Skipper is 'go get' compatible. If needed, create a Go workspace first:
mkdir ws cd ws export GOPATH=$(pwd) export PATH=$PATH:$GOPATH/bin
Get the Skipper packages:
go get github.com/zalando/skipper/...
Create a file with a route:
echo 'hello: Path("/hello") -> "https://www.example.org"' > example.eskip
Optionally, verify the file's syntax:
eskip check example.eskip
Start Skipper and make an HTTP request:
skipper -routes-file example.eskip & curl localhost:9090/hello
Working with the code
Getting the code with the test dependencies (
go get -t github.com/zalando/skipper/...
Build all packages:
cd src/github.com/zalando/skipper go install ./...
Test all packages:
etcd/install.sh go test ./...
Skipper's godoc page includes detailed information on these topics:
- The Routing Mechanism
- Matching Requests
- Filters - Augmenting Requests
- Service Backends
- Route Definitions
- Data Sources
- Extending It with Customized Predicates, Filters, and Builds
- Proxy Packages
- Logging and Metrics
- Performance Considerations