LING Dom0 service

lingd allows to boot LING apps via network, by exposing single directory with LING image and config files to client hosts.

Dependencies

gcc and Erlang/OTP 17.0 on master host
Xen xl toolstack on client hosts

Installation on master host

Clone repo and do the make:

	git clone https://github.com/cloudozer/lingd.git
	cd lingd
	make
	sudo make install

Last step will create an /io dir on your master host - it is a central storage for all LING images and configs.

Now install some app in it. Currently the only tested app is LINCX.

	git clone https://github.com/cloudozer/lincx.git
	cd lincx
	./rebar get-deps
	./rebar co
	cp lincx.yml.sample lincx.yml # default config will be fine, we need only img file from railing
	./railing image
	sudo ./scripts/lingd-install

This will put required LINCX files to /io dir.

Now lets configure LINCX for some client host, e.g. host peer1. Create subdir for it and host specific LINCX config:

	mkdir -p  /io/peer1/lincx1
    nano /io/peer1/lincx1/lincx1.yml

Fill yml file with something like that:

app: lincx

queues:
  - {id: 1, min: 0, max: 100}
  - {id: 2, min: 0, max: 200}

ports:
  - {id: 1, bridge: xenbr1}
  - {id: 2, bridge: xenbr2}
  - {id: 3, bridge: xenbr3}

controllers:
  - 192.168.3.30:6653
  - 10.10.1.1:6633

listen: 0.0.0.0:6653

memory: 512

(assuming that peer1 has all xenbr's set up).

The last thing needed is to generate secret key for lingd. Return to lingd dir and do the following:

	./lingd --generate-key=lingd.key

Ok, master host is ready to serve. Launch lingd on it in server mode:

	./lingd -s

Copy lingd binary and lingd.key to your client host and launch lingd from it in boot mode:

	./lingd -b 192.168.3.254:peer1

If everithing went smoothly you can check launched LINCX by executing on client host:

	xl console lincx1