nilrt-net-boot
所属分类:网络
开发工具:Shell
文件大小:0KB
下载次数:6
上传日期:2020-02-06 23:44:57
上 传 者:
sh-1993
说明: NI Linux RT网络引导工具
(NI Linux RT Network Boot Tools)
文件列表:
LICENSE (1071, 2020-02-06)
dnsmasq.conf (1051, 2020-02-06)
nilrt-make-netboot-image.sh (6664, 2020-02-06)
tftpboot/ (0, 2020-02-06)
tftpboot/ldlinux.c32 (119668, 2020-02-06)
tftpboot/pxelinux.0 (42899, 2020-02-06)
tftpboot/pxelinux.cfg/ (0, 2020-02-06)
tftpboot/pxelinux.cfg/default (680, 2020-02-06)
# nilrt-net-boot: NI Linux RT Network Boot Tools
Network booting is the process of booting a computer system from a
network rather than local disk/flash media. The system's kernel and file
systems are retrieved over the network by firmware/BIOS instead of
accessing those files from local storage. In many cases, storage devices
can be completely removed from these systems to reduce cost. These
schemes are typically employed to centralize software and system
configuration to reduce maintenance overhead.
Preboot Execution Environment (PXE) is a common protocol to implement
network boot. It's supported on some NI controllers like PXIe-8840.
The tutorial below demonstrates PXE network booting an NI Linux RT OS
with user installed software (E.g. LabVIEW RT built app) on PXI.
Written by Haris Okanovic to demonstrate
network boot capabilities of NI Linux RT. Use at your own risk.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
## Create ramdisk image
1. Format, install software, and otherwise configure a real (hardware)
controller using MAX, SD, LabVIEW, and/or other tools. This will
serve as a template system to take an image.
2. Reboot to safemode
3. Copy the enclosed nilrt-make-netboot-image.sh to admin's home
directory via ssh/sftp.
4. Run `nilrt-make-netboot-image.sh -i /mnt/userfs -o /path/to/img.d`
as admin to take an image. Substitute `/path/to/img.d` with any
secondary storage device that's big enough to store the image. E.g.
This could be a USB mass storage device or a network share.
5. Copy `img.d` into the enclosed `tftpboot` directory on your desktop.
This directory contains other files needed for PXE boot. The layout
is documented below for reference.
## TFTP Root Directory Layout
The `tftpboot` directory should look like this after `img.d` is copied:
```
tftpboot/
img.d/
bzImage - Linux kernel image
init - gzipped cpio ramdisk of runmode filesystem
SHA256SUM - checksums of aforementioned files
pxelinux.cfg/
default - PXE configuration file tuned for NI Linux RT
pxelinux.0 - x86_64 Syslinux PXE boot loader (binary)
ldlinux.c32 - x86_64 Syslinux PXE boot loader (binary)
```
NOTE: You can compile your own Syslinux PXE boot loader if desired.
Syslinux PXE Documentation: https://wiki.syslinux.org/wiki/index.php?title=PXELINUX
Syslinux Source: https://mirrors.edge.kernel.org/pub/linux/utils/boot/syslinux/
## PXE Image Hosting Example
NOTE: This simple example uses dnsmasq to provide DHCP and TFTP services
on an isolated network, directly connected to hardware we're booting.
This configuration is intended only to demonstrate PXE booting
capabilities in the simplest environment possible. Please take care when
adapting this example for your network. Hosting a second DHCP service
may create problems for other users/devices on your network!
1. Connect a PXE capable NI controller (E.g. PXIe-8840) to an unused
Ethernet adapter on your desktop. We'll call that adapter "demoEth".
You can connect a USB Ethernet adapter if you don't have a second
one to work with.
2. Run `sudo ifconfig demoEth 192.168.92.1/24` to give demoEth a static
address on the new network. You can change the `192.168.92.X` subnet
if it's already in use. Be sure to update dnsmasq.conf accordingly.
3. Run `dnsmasq --no-daemon --conf-file=dnsmasq.conf --tftp-root="$PWD/tftpboot" --interface=demoEth`
to launch DHCP and TFTP services.
4. Boot the NI controller to BIOS by repeatedly pressing DEL after
powering on.
5. Go to the "Boot" tab.
Enable the "PXE Network Boot" option.
Disable all "Boot Option ##"'s, except the network adapter.
6. Save and reboot in BIOS: Go to "Save & Exit" tab then click on "Save
Changes and Reset" option.
7. You should see the PXE boot agent run, download several files via
TFTP, and boot into NI Linux RT. It will retry indefinitely if
DHCP and TFTP are not configured correctly and you did not specify
a fallback boot device in BIOS.
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