Comment # 12 on bug 1177461 from Thomas Blume

(In reply to Fabian Vogt from comment #11)
> Dracut just needs to install /usr/etc/{services,nsswitch.conf,protocols}
> next to the ones from /etc/

Thanks, now I got it.
But only including the files doesn't seem to be enough.
I've tried the following patch:

-->
diff --git a/modules.d/95nfs/module-setup.sh b/modules.d/95nfs/module-setup.sh
index a2803bba..735795bb 100755
--- a/modules.d/95nfs/module-setup.sh
+++ b/modules.d/95nfs/module-setup.sh
@@ -77,7 +77,9 @@ cmdline() {
 install() {
     local _nsslibs
     inst_multiple -o rpc.idmapd mount.nfs mount.nfs4 umount sed /etc/netconfig
chmod "$tmpfilesdir/rpcbind.conf"
-    inst_multiple /etc/services /etc/nsswitch.conf /etc/rpc /etc/protocols
/etc/idmapd.conf
+    for dir in /etc /usr/etc; do
+        inst_multiple -o $dir/services $dir/nsswitch.conf $dir/rpc
$dir/protocols $dir/idmapd.conf
+    done

     if [[ $hostonly_cmdline == "yes" ]]; then
         local _netconf
--<

But on my testmachine with a testpackage:

-->
c475:/tmp # for i in nsswitch service protocols; do lsinitrd | grep usr/etc/$i;
done
-rw-r--r--   1 root     root         2190 Mar 11 20:26 usr/etc/nsswitch.conf
-rw-r--r--   1 root     root       868252 Mar  2 15:12 usr/etc/services
-rw-r--r--   1 root     root        23259 Mar  2 15:12 usr/etc/protocols
c475:/tmp # 
--<

I still get:

-->
c475:/tmp # journalctl -axb | grep rpcbind
Apr 12 09:50:42 localhost rpcbind[269]: cannot get local address for udp:
Servname not supported for ai_socktype
Apr 12 09:50:42 localhost rpcbind[269]: cannot get local address for tcp:
Servname not supported for ai_socktype
Apr 12 09:50:42 localhost rpcbind[269]: cannot get local address for udp6:
Servname not supported for ai_socktype
Apr 12 09:50:42 localhost rpcbind[269]: cannot get local address for tcp6:
Servname not supported for ai_socktype
Apr 12 09:50:45 localhost rpcbind[270]: cannot open file =
/run/rpcbind/rpcbind.xdr for writing
Apr 12 09:50:45 localhost rpcbind[270]: cannot save any registration
Apr 12 09:50:45 localhost rpcbind[270]: cannot open file =
/run/rpcbind/portmap.xdr for writing
Apr 12 09:50:45 localhost rpcbind[270]: cannot save any registration
--<

Is rpcbind itself aware of /usr/etc?