PXE nfsroot ignoring "%s"
by ThePulsar from LinuxQuestions.org on (#5K4J6)
Hello all,
I have an issue with PXE boot when it comes to handling several clients.
I can get it working -no problem- if I share the same NFS folder for all clients that I set in read-only to avoid concurrency issues. However, this generates a lot of errors and warning by the OS. Fortunately, according to the documentation nfsroot.txt it should be possible to include "%s" in the directory name to have it substituted by the client IP address:
Quote:
so I tried:
Code:APPEND root=/dev/nfs initrd=initrd.img-4.19.0-10-amd64 nfsroot=10.0.0.1:/tftpdboot/%s,rw ip=dhcp rwI also tried adding a trailing / and using \%s but without success. I get an error that the NFS drive does not exist and when I look journalctl I see that %s is never substituted but appears as-is. I checked nfsroot.c and I see no conditional branching that would suggest some env flags would be required for the substitution to occur.
Does anybody have experience in using %s with nfsroot ? Any suggestion ?
I'm running debian 4.19.0-10 (AMD64) on both the client & server. They are inside VirtualBox at the moment. Note again that the PXE boot itself is working, I just have issue when I try to use the %s option.
Final note: documentation also says that if no nfsroot parameter is given, default is /tftpdboot/%s. However, when I omit it I get an error that no nfsroot parameter is given and it does not work either.
I have an issue with PXE boot when it comes to handling several clients.
I can get it working -no problem- if I share the same NFS folder for all clients that I set in read-only to avoid concurrency issues. However, this generates a lot of errors and warning by the OS. Fortunately, according to the documentation nfsroot.txt it should be possible to include "%s" in the directory name to have it substituted by the client IP address:
Quote:
| nfsroot=[<server-ip>:]<root-dir>[,<nfs-options>] If the `nfsroot' parameter is NOT given on the command line, the default "/tftpboot/%s" will be used. <server-ip>Specifies the IP address of the NFS server. If this field is not given, the default address as determined by the `ip' variable (see below) is used. One use of this parameter is for example to allow using different servers for RARP and NFS. Usually you can leave this blank. <root-dir>Name of the directory on the server to mount as root. If there is a "%s" token in the string, the token will be replaced by the ASCII-representation of the client's IP address. |
Code:APPEND root=/dev/nfs initrd=initrd.img-4.19.0-10-amd64 nfsroot=10.0.0.1:/tftpdboot/%s,rw ip=dhcp rwI also tried adding a trailing / and using \%s but without success. I get an error that the NFS drive does not exist and when I look journalctl I see that %s is never substituted but appears as-is. I checked nfsroot.c and I see no conditional branching that would suggest some env flags would be required for the substitution to occur.
Does anybody have experience in using %s with nfsroot ? Any suggestion ?
I'm running debian 4.19.0-10 (AMD64) on both the client & server. They are inside VirtualBox at the moment. Note again that the PXE boot itself is working, I just have issue when I try to use the %s option.
Final note: documentation also says that if no nfsroot parameter is given, default is /tftpdboot/%s. However, when I omit it I get an error that no nfsroot parameter is given and it does not work either.