Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision
Previous revision
httpboot [2009/02/11 17:50]
gluneau
httpboot [2010/10/14 04:39] (current)
dali
Line 1: Line 1:
 ====== HTTP booting ====== ====== HTTP booting ======
- 
-{{ screenshots/​uniboot1.png?​360x200|Linux booting via HTTP}} 
  
 Booting from HTTP with gPXE is as simple as replacing the DHCP filename field with an %%http://%% URL.  For example, if you currently have ///​etc/​dhcpd.conf//​ containing Booting from HTTP with gPXE is as simple as replacing the DHCP filename field with an %%http://%% URL.  For example, if you currently have ///​etc/​dhcpd.conf//​ containing
Line 12: Line 10:
     filename "​http://​my.web.server/​pxe.0";​     filename "​http://​my.web.server/​pxe.0";​
  
 +{{ screenshots/​uniboot1.png?​360x200|Linux booting via HTTP}}
  
-===== Boot file content ​=====+===== Scalability ​=====
  
-You can use any of the commands found in the [[commandline|gPXE command line reference]] ​as instructions booting ​your OS.+HTTP can handle much larger files than TFTP, and scale to much larger distances.  ​You can easily download multi-megabyte files, such as a Linux kernel and a root filesystem, and you can download from servers that are not on your local area network We have successfully tested booting across the Atlantic using HTTP! 
 +===== Using PXELINUX =====
  
-For example http://​etherboot.com/gtest/gtest.gpxe file contains the following gPXE commands:+PXELINUX versions >= 3.70 can use gPXE-provided HTTP.  (See syslinux/NEWS "​Changes in 3.70")
  
-    #!gpxe +By default, PXELINUX will look for its configuration file using TFTP To override this behaviour, you can specify DHCP options 209 and/or 210 (See syslinux/doc/rfc5071.txt)
-    kernel http://​etherboot.org/​gtest/​bz2bzImage root=100 +
-    initrd http://etherboot.org/gtest/initrd.bz2 +
-    boot+
  
-or this will boot from iSCSI:+You can specify these options with your DHCP service ​or you can specify them in a gPXE script:
  
     #!gpxe     #!gpxe
-    ​sanboot iscsi:192.168.2.23::::iqn.1994-04.org.netbsd.iscsi-target:​target1+    ​echo Performing DHCP on first network interface 
 +    dhcp net0 
 +    set 209:string pxelinux.cfg/​default 
 +    set 210:string http://​example.com/​ 
 +    chain ${210:string}pxelinux.0
  
 +The '​chain'​ command above will be expanded by gPXE to:
 +  chain http://​example.com/​pxelinux.0
 +and the chained-to PXELINUX will look for its configuration file using the 210 prefix.
 +All relative paths specified in the PXELINUX configuration file will also have this prefix
 +prepended to them.
  
 +===== Using gpxelinux.0 =====
  
-===== Scalability ===== +Since SYSLINUX 3.85 there is also the option of using gpxelinux.0 with pxelinux.0 embeddedexample: 
- +<code text> 
-HTTP can handle much larger files than TFTP, and scale to much larger distances You can easily download multi-megabyte filessuch as a Linux kernel and a root filesystem, and you can download from servers that are not on your local area network. ​ We have successfully tested booting across the Atlantic using HTTP!+#!gpxe 
 +echo Performing DHCP on first network ​interface 
 +dhcp net0 
 +set 209:string pxelinux.cfg/​default 
 +set 210:string http://​example.com/​ 
 +imgload pxelinux.0 
 +boot pxelinux.0 
 +</​code>​
  

Navigation

* [[:start|Home]] * [[:about|About our Project]] * [[:download|Download]] * [[:screenshots|Screenshots]] * Documentation * [[:howtos|HowTo Guides]] * [[:appnotes|Application Notes]] * [[:faq:|FAQs]] * [[:doc|General Doc]] * [[:talks|Videos, Talks, and Papers]] * [[:hardwareissues|Hardware Issues]] * [[:mailinglists|Mailing lists]] * [[http://support.etherboot.org/|Bugtracker]] * [[:contributing|Contributing]] * [[:editing_permission|Wiki Edit Permission]] * [[:wiki:syntax|Wiki Syntax]] * [[:contact|Contact]] * [[:relatedlinks|Related Links]] * [[:commerciallinks|Commercial Links]] * [[:acknowledgements|Acknowledgements]] * [[:logos|Logo Art]]

QR Code
QR Code httpboot (generated for current page)