198 lines
5.3 KiB
Markdown
198 lines
5.3 KiB
Markdown
# APU server
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The APU is a Linux box to be used as a control box at LIN sample environment
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servercfg/ contains the configuration files for all boxes
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to_system/ contains the files to be installed in the system
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## config files
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filename: servercfg/(hostname)_(hexdigits).cfg
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* (hostname) the hostname to be given on startup
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* (hexdigits) the last six digits of the ethernet adress of the first interface on the APU (leftmost plug)
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content of the config files:
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```
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[NETWORK]
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enp1s0=192.168.127.254 # leftmost socket: connect here a moxa with factory settings
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enp2s0=192.168.2.2 # connected device will get this ip via DHCP
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enp3s0=192.168.3.3 # or must be configured static to this IP
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enp4s0=dhcp # rightmost socket is the uplink
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[ROUTER]
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3000=/dev/ttyUSB0 # routing 3000 to the internal serial port /dev/ttyUSB0
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5900=192.168.2.33 # routing VNC (local port 5900 to port 5900 on 192.168.2.33
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8080=192.168.127.254:80 # routing 8080 to port 80 of 192.168.127.254
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[FRAPPY]
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cfg=uniax # the cfg file for the frappy server
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port=5000 # the port for the frappy server
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[DISPLAY]
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startup_text=startup...|HOST|ADDR # startup text, 3 lines separated with |
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```
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## network configuration
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The example above fits the most cases.
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Remark: as the control boxes (MLZ type) are labelled with 'eth0' etc., the names might be given in this form.
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Internally the more modern names like 'enp1s0' are used.
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Here a detailed description of possible settings:
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### fixed IP
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```
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enp2s0=192.168.3.5
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```
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Configure the IP address of the connected device to get the specified IP via DHCP or
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configure the device to with this static IP. The last number must be within 1..254,
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the APU port itself will get 1 (or 2, if the specified IP is 1).
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### custom network
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```
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enp3s0=192.168.3.1/24 # our ip address, the static address of the connected device must
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# be within 1-254 and not match our own
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```
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24 means 24 bit = 3 bytes network address.
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A local network with static addresses. This way, the APU can get an other address than
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192.168.x.1 or 192.168.x.2 or the network address size might be defined other than 24.
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Probably needed rarely.
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### uplink via DHCP
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```
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enp4s0=wan # or enp4s0=dhcp
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```
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Uplink configured for DHCP in any network n.x.y.z with n < 192
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### customized uplink
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```
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enp1s0=wan,192.168.1.0/24
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```
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Add more networks to the allowed uplink range. More than one range is allowed, comma separated.
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Must not overlap networks specified for other ports!
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### disabled port
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```
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enp3s0=off # disabled
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```
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## display
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available on control boxes (MLZ type) only. must therefore not be present on bare apu boxes.
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## Installation of a Fresh Control Box or bare APU
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### Tools / Resources needed
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#### progress bar
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On mac use ``brew install pv`` to install. If you do not want it, you may leve it out,
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it is a matter of convenience. In this case omit ``| pv `` in the commands
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## install image by means of an USB stick
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The stick has TinyLinux and on it and some additional scripts
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If you do not have one, you may create it logging to an other box as root
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### a) create a USB stick with TinyLinux (omit if you have the stick already)
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to verify that /dev/sdb is your stick, use the following command before and after plugging the stick
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```
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apu> ls /dev/sdb
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```
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copy the stick image to the stick (32 GB should be enough)
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```
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mac> dd if=apuinstall.lz4 bs=512k | pv | ssh root@<ip or hostname> "lz4 -d | dd of=/dev/sdb bs=512k"
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```
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### b) mount with TinyLinux from USB stick
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Connect a Mac with an USB to serial adapter (and null-modem!).
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If no such adapter is available, you might try to connect LAN and search for computer name box,
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do the registration in PacketFence and reboot, login with root/root).
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```
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mac> screen /dev/tty.usbserial-130 115200
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```
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Do not yet connect LAN, plug USB stick and start the box, wait for prompt 'tc@box:'
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```
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apu> cd /media/CENTOS7_APU (or /media/CENTOS_APU)
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apu> sh reg
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```
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enter new hostname (HWaddr will be on the output)
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register to PacketFence (if not yet done) and set role to sinq-samenv
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connect LAN to rightmost socket on a bare APU or the leftmost socket an a control box
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```
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apu> sh tiny
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...
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some random art images are shown ...
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...
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inet addr:129.168.1.43 Bcast:192.168.1.255 Mask:255.255.255.0
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inet addr:127.0.0.1 Mask:255.0.0.0
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```
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Use the displayed ip address for the following step.
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### c) Copy Image to APU SSD
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```
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mac> cd ~/switchdrive/apu/images
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mac> dd if=apumaster.lz4 bs=512k | pv | ssh root@192.168.1.43 "lz4 -d | dd of=/dev/sda bs=512k"
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```
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(you are asked for root password, which is root, ``| pv `` may be omitted)
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remove the stick, power off/on
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login with root/FrappyLinse
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```
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> cd aputools
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> git pull
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> python3 install.py
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...
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enter host name:
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...
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> reboot now
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```
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DONE!
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### d) Cloning an Image from an Existing Box
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Use (b) above to boot from TinyLinux (replace the IP address by the one from the box!)
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First make sure that a copy of the last apumaster.lz4 is saved with its date.
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```
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mac> ssh root@192.168.1.43 "dd if=/dev/sda bs=512k | lz4" | pv | dd of=apumaster.lz4 bs=512k
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```
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### e) Appendix
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Source of scripts on TinyLinux:
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```
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apu> cat tini.sh
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tce-load -wi nano
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tce-load -wi lz4
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tce-load -wi openssh
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sudo /usr/local/etc/init.d/openssh start
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sudo chpasswd << EOF
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tc:tc
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root:root
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EOF
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ifconfig | grep 'inet addr'
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```
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