lxc_manager_node

This has been tested on clean install of ubuntu 16.04 64bit.

install

Update you system to the newest packages and reboot. You may need to do this several times:

sudo apt-get update && sudo apt-get upgrade -y && sudo reboot

Once there are no more updates, add the virt user:

sudo adduser virt

Make the password something strong, and remember it.

Now you can install the packages we need:

sudo add-apt-repository ppa:ubuntu-lxc/stable
sudo add-apt-repository ppa:ubuntu-lxc/cgmanager-stable
sudo apt-get update && sudo apt-get upgrade
sudo apt-get install git nodejs npm lxc btrfs-tools lxctl lxc-templates uidmap libpam-cgfs

may need this

https://discuss.linuxcontainers.org/t/failed-creating-cgroups/272/10 looking more into it.

remap nodejs to node:

sudo ln -s /usr/bin/nodejs /usr/bin/node

And install the node packages:

sudo npm install -g forever

give the virt user network access:

echo "virt veth lxcbr0 1024" | sudo tee -a /etc/lxc/lxc-usernet

lets set up the config file for the virt user, first switch users:

su virt

The lines below will add the proper config file:

mkdir -p ~/.config/lxc
echo "lxc.id_map = u 0 `grep -oP "^$USER:\K\d+" /etc/subuid` `grep -oP "^$USER:\d+:\K\d+" /etc/subuid`" > ~/.config/lxc/default.conf
echo "lxc.id_map = g 0 `grep -oP "^$USER:\K\d+" /etc/subgid` `grep -oP "^$USER:\d+:\K\d+" /etc/subgid`" >> ~/.config/lxc/default.conf
echo "lxc.network.type = veth" >> ~/.config/lxc/default.conf
echo "lxc.network.link = lxcbr0" >> ~/.config/lxc/default.conf

Clone the repo and set it up:

git clone https://github.com/wmantly/lxc_manager_node.git
cd lxc_manager_node
npm install

Its safer at this point to reboot the system, exit back to the privlaged user and reboot

SSH or log dercily into the virt user!!! this will not work if you use su to get into the user!

Now you can can create a test container:

lxc-create -t download -n test-ubuntu -- -d ubuntu -r trusty -a amd64

start and attach the container to make sure everthing is ok:

lxc-start -n test-ubuntu -d
lxc-attach -n test-ubuntu

If everything worked you can stop and delete the container

lxc-stop -n test-ubuntu
lxc-destroy -n test-ubuntu

Open resty config file

server {
    listen 80;

    location / {
        resolver 10.0.3.1;  # use LXC dns

		set $target '';
		access_by_lua '
			function mysplit(inputstr, sep)
				-- http://stackoverflow.com/a/7615129/3140931
			    if sep == nil then
			            sep = "%s"
			    end
			    local t={} ; i=0
			    for str in string.gmatch(inputstr, "([^"..sep.."]+)") do
			            t[i] = str
			            i = i + 1
			    end
			    return t,i
			end

			host, hostLen = mysplit(ngx.var.host, ".")

			if hostLen == 1 then
				ngx.var.target = host[0]..":15000"
			elseif hostLen == 6 then
				ngx.var.target = host[1]..":"..host[0]
			elseif hostLen == 5 then
				ngx.var.target = host[0]..":15000"
			else
				return ngx.exit(599)
			end
		';

        proxy_pass http://$target;
        proxy_set_header X-Real-IP  $remote_addr;
        proxy_set_header X-Forwarded-For  $remote_addr;
        proxy_set_header Host $host;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }
}

auto start

crontab

@reboot /usr/local/bin/forever start -a -o /home/virt/lxc_manager_node/server.out.log -e /home/virt/lxc_manager_node/server.err.log /home/virt/lxc_manager_node/bin/www

##rc.local

sudo cgm create all virt
sudo cgm chown all virt $(id -u virt) $(id -g virt)

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