scytale

(pronounced "skit-uh-​lee")

Summary

Scytale is the API server of XMiDT. Scytale will fanout the API request to all the petasoses that scytale knows of.

Table of Contents

• Code of Conduct
• Details
• Build
• Deploy
• Contributing

Code of Conduct

This project and everyone participating in it are governed by the XMiDT Code Of Conduct. By participating, you agree to this Code.

Details

Scytale has two API endpoints to interact with the devices: 1) get the statistics for a device and 2) send a WRP Message to the device. If the device isn't connected, a 404 is returned.

Device Statistics - /api/v2/device/{deviceID}/stat endpoint

This will return the statistics of the connected device, including information such as uptime and bytes sent. This information is retrieved from the talaria that the device is connected to.

Send WRP to Device - /api/v2/device/send endpoint

This will send a WRP message to the device. Scytale will accept a WRP message encoded in a valid WRP representation - generally msgpack or json and will forward the request to the correct talaria.

Build

Source

In order to build from the source, you need a working Go environment with version 1.11 or greater. Find more information on the Go website.

You can directly use go get to put the scytale binary into your GOPATH:

GO111MODULE=on go get github.com/xmidt-org/scytale

You can also clone the repository yourself and build using make:

mkdir -p $GOPATH/src/github.com/xmidt-org
cd $GOPATH/src/github.com/xmidt-org
git clone git@github.com:xmidt-org/scytale.git
cd scytale
make build

Makefile

The Makefile has the following options you may find helpful:

• make build: builds the scytale binary
• make docker: builds a docker image for scytale, making sure to get all dependencies
• make local-docker: builds a docker image for scytale with the assumption that the dependencies can be found already
• make test: runs unit tests with coverage for scytale
• make clean: deletes previously-built binaries and object files

RPM

First have a local clone of the source and go into the root directory of the repository. Then use rpkg to build the rpm:

rpkg srpm --spec <repo location>/<spec file location in repo>
rpkg -C <repo location>/.config/rpkg.conf sources --outdir <repo location>'

Docker

The docker image can be built either with the Makefile or by running a docker command. Either option requires first getting the source code.

See Makefile on specifics of how to build the image that way.

For running a command, either you can run docker build after getting all dependencies, or make the command fetch the dependencies. If you don't want to get the dependencies, run the following command:

docker build -t scytale:local -f deploy/Dockerfile .

If you want to get the dependencies then build, run the following commands:

GO111MODULE=on go mod vendor
docker build -t scytale:local -f deploy/Dockerfile.local .

For either command, if you want the tag to be a version instead of local, then replace local in the docker build command.

Kubernetes

A helm chart can be used to deploy scytale to kubernetes

helm install xmidt-scytale deploy/helm/scytale

Deploy

For deploying a XMiDT cluster refer to getting started.

For running locally, ensure you have the binary built. If it's in your GOPATH, run:

scytale

If the binary is in your current folder, run:

./scytale

Contributing

Refer to CONTRIBUTING.md.