[2024-feb-29] Sad news: Eric Layton aka Nocturnal Slacker aka vtel57 passed away on Feb 26th, shortly after hospitalization. He was one of our Wiki's most prominent admins. He will be missed.
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howtos:network_services:nfs_root [2018/05/28 21:38 (UTC)] – [Configuring LILO] bifferos | howtos:network_services:nfs_root [2018/05/28 22:11 (UTC)] – [Configuring LILO] bifferos | ||
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==== Creating the kernel ==== | ==== Creating the kernel ==== | ||
- | The full huge kernel that comes with Slackware is close to providing everything we need, but we still need to recompile it. I'd recommend doing the compilation on a 32-bit virtual machine if you are targeting a 32-bit thin client, or 64-bit if your thin client is 64-bit. | + | The full huge kernel that comes with Slackware |
< | < | ||
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< | < | ||
- | [OPTIONAL] It's pretty useful to append a local version to this kernel release. | + | [OPTIONAL] It's pretty useful to append a local version to this kernel release. |
< | < | ||
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Obviously keep your default linux kernel in another image= section so you can switch between booting the nfsroot and the normal kernel to play around with this stuff. | Obviously keep your default linux kernel in another image= section so you can switch between booting the nfsroot and the normal kernel to play around with this stuff. | ||
- | You cannot specify a normal root= entry in this section because | + | You cannot specify a normal root= entry in this section because |
The v3 seems to be really important in making anything at all happen on boot. If that isn't set, no communication seems to occur. | The v3 seems to be really important in making anything at all happen on boot. If that isn't set, no communication seems to occur. | ||
- | The ' | + | The ' |
With the kernel compilation finished, copy the kernel into the /boot directory and rename it: | With the kernel compilation finished, copy the kernel into the /boot directory and rename it: | ||
Line 107: | Line 107: | ||
< | < | ||
- | It may be created elsewhere depending on your architecture, | + | It may be created elsewhere |
Don't forget to run LILO: | Don't forget to run LILO: | ||
< | < | ||
+ | |||
+ | ==== First Boot ==== | ||
+ | |||
+ | The above is enough to get you a booting Slackware system, or should be. There are some additional steps that you may wish to now do. | ||
+ | |||
+ | === Modules === | ||
+ | |||
+ | None of the modules have been installed, let's add them. Shutting down the nfsroot system and booting back into the Slackware kernel compilation virtual machine we can now compile the missing modules. | ||
+ | |||
+ | < | ||
+ | |||
+ | Then we can compile and install the modules: | ||
+ | |||
+ | < | ||
+ | # make modules | ||
+ | # make modules_install INSTALL_MOD_PATH=/ | ||
+ | |||
+ | For the last command, try to avoid adding a trailing slash to /mnt, and try not to forget the INSTALL_MOD_PATH, | ||
+ | |||
+ | === Swap on NFS === | ||
+ | |||
+ | You can create a swap file on your NFS share somewhere like this: | ||
+ | |||
+ | < | ||
+ | |||
+ | Then format it for swap: | ||
+ | |||
+ | < | ||
+ | |||
+ | Then on the client you associate a loopback device with the file: | ||
+ | |||
+ | < | ||
+ | |||
+ | Then start using the loopback device for swap: | ||
+ | |||
+ | < | ||
+ | |||
+ | Obviously you need to add the last two commands to / | ||
+ | |||
+ | === Locking down / | ||
+ | |||
+ | Assuming your thin client connects from a predictable address, now that we've installed the modules we can finally lock down access to only the thin client (/ | ||
+ | |||
+ | < | ||
+ | |||
+ | And we presumably don't want all-and-sundry using our newly prepared rootfs directory, so drop it down a level and qualify it by IP address: | ||
+ | |||
+ | < | ||
+ | # mv nfs_share 172.17.0.81 | ||
+ | # mkdir nfs_share | ||
+ | # mv 172.17.0.81 nfs_share</ | ||
+ | |||
+ | Now over on the client machine, having booted into the kernel compilation machine, configure lilo so nfsroot | ||
+ | requests the nfs share based on the client' | ||
+ | |||
+ | < | ||
+ | label = nfs | ||
+ | read-only | ||
+ | append= " | ||
+ | |||
+ | NFS Root is never going to be considered secure, but at least this makes cross-contamination of nfsroots less likely. | ||
+ | |||
+ | |||
====== Sources ====== | ====== Sources ====== |