Skull

Skull is an event-driven serving framework with multiple modern designs to allow user:

Fast to create a prototype
Easy to maintain even a huge project
Write code in lock-free environment

It helps people to build an application/server extremely fast and strong, high scalability and flexibility in application layer, and with strong performance in engine level. Read more here.

Skull can be used in generic serving layer or embedded device. E.g. web logic server, game server, etc. Want an example? Check this DNSTurbo project, and watch its Trailer on Youtube for a quick start :)

Releases

Changelog

Latest Feature Demo

Memory tracing reports:

Memory Usage
Cross-Scope Malloc/Free
Memory Leak

Documentations

How to Build

Use Ubuntu18.04 as an example. (Tested on Debian jessie/stretch, Ubuntu 14.04/16.04/18.04, alpine 3.6/3.8, RHEL6/7 and Raspbian jessie/stretch)

Basic System Requirements

Skull requires:

Platform: Linux
C/C++: Compiler supports at least c99/c++11 standards or higher
Python: Python3

Install Dependencies

# Install System Dependencies
sudo apt-get install autoconf libtool valgrind expect python3-dev python3-pip;
sudo pip3 install PyYAML pympler WebOb;

# Clone and Build Dependencies (For example: project folder is 'skull')
cd skull && git submodule update --init --recursive;

# Compile and install dependencies
make -j4 dep; sudo make install-dep;

Build and Install

make -j4
sudo make install

Notes:

To disable jemalloc, use make -j4 disable_jemalloc=true to build it
For some Linux Releases, we might need to use CFLAGS, CXXFLAGS, LDFLAGS to finish the build

More Options:

python_path: By default it's python3, but we can override it to another path for testing purpose

Docker Images

Also, the Docker images are ready now, if people don't want to waste time to set up a brand new environment, we can run the Docker image directly within 1 min :)

Assume that we've already installed Docker, then apply the following commands to pull and run the image to bring user into a development ready environment super fast:

-bash$ docker pull finaldie/skull:1.2-build
-bash$ docker run -it finaldie/skull:1.2-build

And the below table is the current images:

Tag	Dockerfile	Notes
1.4	(Dockerfile)	1.4 Debian runtime image
1.4-build	(Dockerfile)	1.4 Debian dev/building image
1.4-ubuntu	(Dockerfile)	1.4 Ubuntu runtime image
1.4-ubuntu-build	(Dockerfile)	1.4 Ubuntu dev/building image
1.4-alpine	(Dockerfile)	1.4 Alpine runtime image
1.4-alpine-build	(Dockerfile)	1.4 Alpine dev/building image

A Quick Demo

After installing Skull into the system, run the following steps to create a Skull project, have fun :)

Create a Skull Project

Notes:

By default, a new module contains the example code which is used to echo-back message
Above creation is for C++ module, type py in language selection step if needed

Playing with Skull

Existing Services

Name	Description
DNS Client	Async DNS client for A/AAAA record
Http Client	Async http client service, easy to send/receive http request/response

Other Resources

Name	Description
Skull-Perf Cases	Including some basic perf cases
DNSTurbo	Smart DNS Client based on Skull. Trailer

Contribution and Discussion

To discuss any issues, there are some ways we can use:

Open an issue on Github directly
Discuss at Reddit: https://www.reddit.com/r/skullengine/
Send an email to skull-engine@googlegroups.com
Go directly to the Mail Group, and post the questions.

To fix a bug or add a new feature, just Fork the repo, then apply the fixes/features via a PR.