[fix] more doc + fixes
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# LJ Packer
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### Welcome to LJ Packer, [LJ](https://git.interhacker.space/teamlaser/LJ) software's virtual machine images provider.
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#### Errr... Sorry but what is this "LJ" thing already?
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* LJ is used to command multiple _LASERS_ via a _CENTRAL SERVER_
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* _CENTRAL SERVER_ exchanges data with _LASERS_ and _POINTS GENERATORS_ on a Local Area Network (LAN)
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* _LASERS_ use _[ETHER-DREAMS](https://ether-dream.com/)_ interfaces to connect to _LAN_
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* _POINTS GENERATORS_ store their output in a _REDIS_ located on _CENTRAL SERVER_
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**The images produced by this code provide _CENTRAL SERVER_ and _REDIS_, plus some help to configure _LAN_.** You will need _LASERS_ and _ETHER-DREAMS_ to get a fully working setup.
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## OK, but why?
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LJ is written in Python with lots of dependencies and can be a bit difficult to configure, hence the need for such bootable and easily (re)configured system images.
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**But be cautious, the images are not safe to run on the Internet AT ALL!** The SSH server is open for root login with a _**VERY**_ simple password:
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```
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root:laser
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```
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**Run the images produced with care on local / airtight networks.**
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# Images
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No official repository for images yet, but this is expected in the future.
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# Limitations
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All of this has been tested only on Debian 10 Buster. YMMV.
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# Crash course
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These instructions are for *building* images, see below to *run* images.
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You need to [install packer](https://www.packer.io/downloads) first, the syntax is valid with version 1.6+
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**Compiling for qemu (recommanded):**
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```
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sudo apt install qemu qemu-kvm
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git clone https://git.interhacker.space/teamlaser/lj-packer
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cd lj-packer
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# The "no-desktop" install
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PACKER_LOG=1 sudo packer build -on-error=ask --only=teamlaser-lj build.json
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# The "desktop" install
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PACKER_LOG=1 sudo packer build -on-error=ask --only=teamlaser-lj-xfce build.json
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```
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**Compile for LXC (not fully tested, should work):**
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```
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sudo apt install lxc
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PACKER_LOG=1 sudo packer build -on-error=ask --only=teamlaser-lj-lxc build.json
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```
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All the compilation should be automatic, and result with images in local directories (output, output)
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# Running in KVM
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All commands are given for terminal use and probably require root access.
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You will need to select one of the images from those:
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```
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export IMAGE=packer-teamlaser-lj-xfce
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export IMAGE=packer-teamlaser-lj
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```
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## kvm:user : KVM with simple/no-LAN network
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**It is the simple solution, useful for fast testing the software.**
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You will access the VM services through "virtual" localhost ports of your machine.
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But the VM will not be able to exchange data on LAN.
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### kvm:user Local Ports to VM ports
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Ports translations are done by adding 10000 to each VM service port.
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* 10022 SSH(22)
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* 10080 HTTP(80)
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* 10443 HTTPS(443)
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* 16379 REDIS(6379)
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* 16454 ARTNET(6454)
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* 19001 WEBSOCKET(9001)
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So, to connect to the SSH server you will use the 10022 port on localhost.
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### kvm:user Booting
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```
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# start the VM
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sudo /usr/bin/qemu-system-x86_64 \
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-m 2048M -boot once=d \
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-machine type=pc,accel=kvm \
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-display gtk -vnc 127.0.0.1:6 \
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-name ${IMAGE}\
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-drive file=${IMAGE},format=qcow2
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-device virtio-net,netdev=user.0 \
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-netdev user,id=user.0,hostfwd=tcp::10022-:22,hostfwd=tcp::10080-:80,hostfwd=tcp::10443-:443,hostfwd=tcp::16379-:6379,hostfwd=tcp::6454-:6454,hostfwd=tcp::19001-:9001\
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```
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### kvm:user Connecting
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```
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# Wait until ssh/login is available in the VM
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# Type password "laser" i.e. "lqser" on AZERTY keyboards
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ssh root@localhost -p10022
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```
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## kvm:bridge KVM with full network access
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**It is a more complex solution, useful for real use of LJ with _LASERS_ on _LAN_.**
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You will access the VM services through "virtual" localhost ports of your machine.
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But the VM will not be able to exchange data on LAN.
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### kvm:bridge 1. Network configuration
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Here is the documentation on how to setup a bridge interface on your machine.
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It is a bit complex, but follow the instructions and it should be fine...
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#### kvm:bridge 1.0. First some variables / names we will use
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```
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# 0. Names / concepts
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HOST The name used to define your laptop (or any other machine running qemu)
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GUEST The name used to define the qemu virtual machine
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# 0. Variables
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HOST_IF The variable for HOST's network interface, the one used for LAN. Ex: eth0, ens3
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HOST_IP The variable for HOST's IP address on the LAN. Ex: 192.168.1.20
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IP_RANGE The variable for size of a the subnet for your LAN. Ex: /24
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GUEST_IF The variable for GUEST's network interface.
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GUEST_IP The variable for GUEST's IP address on the LAN. Ex: 192.168.1.21
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SU The sudo command required if not running as root
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## As an Example, here is a working configuration
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export HOST_IF=enx9cebe8ce6930
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export HOST_IP=192.168.1.99
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export IP_RANGE=/24
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export SU='sudo '
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```
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#### kvm:bridge 1.1. Configuring HOST network interfaces
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```
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# 1. Configure HOST: set up bridge over HOST_IF
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$SU ip l set dev ${HOST_IF} down
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$SU brctl addbr br0
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$SU brctl addif br0 ${HOST_IF}
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$SU ip tuntap add tap0 mode tap
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$SU brctl addif br0 tap0
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$SU iptables -t nat -A POSTROUTING -o br0 -j MASQUERADE
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$SU iptables -I FORWARD -i br0 -j ACCEPT
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$SU ip l set dev ${HOST_IF} up
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$SU ip l set dev br0 up
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$SU ip l set dev tap0 up
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$SU ip a add ${HOST_IP}${IP_RANGE} dev br0
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$SU sysctl net.ipv4.ip_forward=1
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##troubleshooting: there must be NO ip address attached to $HOST_IF
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$SU ip address show dev ${HOST_IF} | grep global || echo -e "\n\e[31mOops.... Remove all IP addresses from ${HOST_IF}! Use:\e[0m\n\n$SU ip address del (address/range shown above) dev ${HOST_IF}"
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```
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#### kvm:bridge 1.2. Booting the VM
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Notice how the `net` model changed: we have a MAC address and use the `tap` interface to exchange network packets.
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```
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sudo /usr/bin/qemu-system-x86_64\
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-m 2048M -boot once=d\
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-machine type=pc,accel=kvm\
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-display gtk -vnc 127.0.0.1:6\
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-name ${IMAGE}\
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-drive file=${IMAGE},format=qcow2\
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-net nic,model=virtio,macaddr=00:00:00:00:00:01\
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-net tap,ifname=tap0\
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```
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### kvm:bridge 1.3. Configuring GUEST's network
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This part may be more or less complex, as a DHCP server might automatically assign an IP address to your VM.
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Use the connection via login described below (1.4.2) : **a script will check the network connectivity on login.**
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According to its output,
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* *you might be fine*: it will show an IP address which you can use to connect using standard protocols, i.e. SSH, HTTPS, etc.
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* *you might be required to configure the network*. In such a case, you will be asked
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* if you want to configure the network with a graphical tool.
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This is an option for expert users.
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It uses the nmtui (network-manager Terminal UI) interface.
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Use <Edit a connection><Add a connection> and to forget to <Activate> your interface
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* to provide the GUEST_IP/RANGE and the GUEST_GW to use.
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* GUEST_IP/RANGE are depending on your HOST_IP in the LAN
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* GUEST_GW is your HOST_IP
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* Also, can do things by yourself with the following commands:
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```
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ip address add ${GUEST_IP}/${IP_RANGE} dev ${GUEST_IF}
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ip route add default via ${HOST_IP}
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```
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### kvm:bridge 1.4 Connecting
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#### kvm:bridge 1.4.1 Connecting via login
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If you started the QEMU with a display, you can connect to it as root.
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CAUTION for french users, it as QWERTY keyboard mapping, type`lqser`
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```
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USER "root"
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PASS "laser" # i.e. "lqser" on AZERTY keyboards
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```
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#### kvm:bridge 1.4.2 Connecting via SSH
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```
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# Wait until ssh/login is available in the VM
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# Type password "laser" i.e. "lqser" on AZERTY keyboards
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ssh root@${GUEST_IP}
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```
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# Todos
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[] Export USB devices
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[] Nginx redirect to https
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[] Nginx wss websockets redirect
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[x] @todo deploy http(+s with snakeoil cert) with nginx
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[x] @todo read IP from updateUI.pu OR BETTER read IP addresses from a common file
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@ -95,7 +95,6 @@
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"sleep 3",
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"apt update",
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"apt install -y --no-install-recommends cmake git libasound2-dev libjack-dev libsdl1.2-dev network-manager nginx portaudio19-dev python3-dev python3-pip python3-rtmidi redis-server screen ssh ssl-cert ",
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"systemctl disable network-manager.service",
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"pip3 install setuptools",
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"pip3 install DMXEnttecPro mido numpy pysimpledmx redis scipy ",
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"git clone https://github.com/ptone/pyosc --depth 1 /tmp/pyosc && cd /tmp/pyosc && ./setup.py install ",
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@ -1,79 +0,0 @@
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cd /opt/LJ
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echo -e "\n\e[1;31m"
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cat << HEREDOC
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\ \ / | | | |
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\ \ \ / _ \ | __| _ \ __ \__ \ _ \ __| _ \ | |
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\ \ \ / __/ | ( ( | | | | __/ | ( | | \ |
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\_/\_/ \___| _| \___| \___/ _| _| _| \___| \__| \___/ _____| \___/
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HEREDOC
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echo -e "\e[0m\n"
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# Check the ip address on the machine
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checkNetwork(){
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ping=$( ping 1.1.1.1 -c 1 -W 2 &>/dev/null; echo $?;)
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# Net is working, escape
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[[ 0 -eq $ping ]] && return
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echo -e "\nOops... No network configured yet..."
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# Eventually, use nm-tui for a graphical (ncurses install)
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read -e -p "Do you want to set up network via the ncurses tool? [yN]: "
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[[ "${REPLY^^}" == "Y" ]] && { nmtui; return; }
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# Get the ethernet interface
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# 772 is the loopback device, cf. http://lxr.linux.no/linux+v3.0/include/linux/if_arp.h#L67
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for f in /sys/class/net/* ; do
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[[ 772 != $(cat "$f/type" ) ]] && interface=$(basename $f)
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done
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[[ -z "$interface" ]] && { echo -e "\e[31mFatal Error : no network interface configured."; return; }
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echo "Found network interface '$interface'"
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# Ensure the interface is up
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ip l set $interface up
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ipList=$( ip address show | grep global )
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ipRoute=$( ip route show | grep default )
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[[ -z "$ipList" ]] && {
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echo -e "\nNo IP address configured. Please set one."
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read -e -i '192.168.2.100/24' -p "Which address/range do you want to use (or 'x' to skip)? " ipAddr
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[[ 'x' != "$ipAddr" ]] && {
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ip address add $ipAddr dev $interface
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}
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}
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[[ -z "$ipRoute" ]] && {
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echo -e "\nNo IP route configured. Please set one."
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read -e -i '192.168.2.1' -p "Which routing address do you want to use (or 'x' to skip)? " ipAddr
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[[ 'x' != "$ipAddr" ]] && {
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ip route add default via $ipAddr dev $interface
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}
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}
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}
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checkNetwork
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[[ ! -f /tmp/.first_run ]] && {
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touch /tmp/.first_run ;
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echo -e "\e[1mCaution! configuring the server and lasers network is mandatory for the app to work."
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echo -e "Type the "c" key immediately to start the configuration."
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echo -e "\e[0m"
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echo -e "Everytime you will login, the configure and documentation options will be offered to you."
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echo -e "Or use the commands 'config' or 'usage' any time to access the same functions."
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echo -e "\e[0m"
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}
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config(){ cd /opt/LJ ; /usr/bin/python3 configure.py; }
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usage(){ cat /opt/LJ/README.md; }
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echo -e "\e[1m"
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read -e -n 1 -p "Do you want to (c)onfigure the app, (r)ead documentation, or (n)othing: "
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echo -e "\e[0m"
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case $REPLY in
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(c):
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config
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;;
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(r):
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usage
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;;
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esac
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