new-install

commit 1af7fb047484050aa4c95a96701e326a2b84ae5e
parent d8bb5ce6473af1c47500e18bb2224974a92f7e0e
Author: Chris Bracken <chris@bracken.jp>
Date:   Wed,  8 Sep 2021 17:32:07 -0700

arch: add notes on idmapd for NFS

Diffstat:
M
arch_install.md
 | 
22
++++++++++++++++++----

1 file changed, 18 insertions(+), 4 deletions(-)
diff --git a/arch_install.md b/arch_install.md
@@ -656,9 +656,9 @@ set consistently across both:
 Domain = bracken.jp
 ```
 
-With the default security mechanism, idmapd support is disabled. You can verify
-this by running:
-```
+With the default security mechanism, [idmapd][idmapping] support is disabled.
+You can verify this by running:
+```sh
 cat /sys/module/nfs/parameters/nfs4_disable_idmapping
 cat /sys/module/nfsd/parameters/nfs4_disable_idmapping
 ```
@@ -671,12 +671,26 @@ options nfs nfs4_disable_idmapping=0
 options nfsd nfs4_disable_idmapping=0
 ```
 
-Edit `/etc/fstab` to contain the new mounts:
+Note that, as noted in the [idmapd][idmapping] section of the NFS wiki, it is
+_not_ necessary to run the nfs-imapd systemd service since there's already a
+newer ID mapper built-in. You can see this by running:
+```sh
+dmesg | grep id_resolver
+```
+
+Finally, we edit `/etc/fstab` to add the new mounts:
 ```
 # Filesystem                   Mountpoint           Type Options                      Dump  Pass
 servername:/path/to/directory  /path/to/mountpoint  nfs  rw,nfsvers=4,_netdev,noauto  0     0
 ```
 
+```
+systemctl start nfs-idmapd
+```
+
+[idmapping]: https://wiki.archlinux.org/title/NFS#Enabling_NFSv4_idmapping
+
+
 ### HP printer support
 
 Next, we'll configure [CUPS][cups_guide] printer support for HP printers,