** Changed in: nfs-utils (Debian)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1616123
Title:
rpc-svcgssd.service uses incorrrect variable SVCGSSDARGS
Status in nfs-utils package in Ubuntu:
Fix Released
Status in nfs-utils source package in Xenial:
Fix Released
Status in nfs-utils source package in Bionic:
Fix Released
Status in nfs-utils source package in Cosmic:
Fix Released
Status in nfs-utils package in Debian:
Fix Released
Bug description:
[Impact]
Command line options set for rpc.svcgssd in the
/etc/default/nfs-kernel-server file are not passed on to the service, being
ignored.
[Test Case]
* In a VM (LXD won't work), install nfs-server and a kerberos server. Use
"EXAMPLE.LOCAL" for the realm, and "localhost" for the servers, when prompted:
sudo apt install nfs-server krb5-kdc krb5-user krb5-admin-server
* create the EXAMPLE.LOCAL realm. Use any password you want for the database
master key, it won't be requested again:
sudo krb5_newrealm
* create a principal for the nfs service:
sudo kadmin.local -q "addprinc -randkey nfs/$(hostname -f)"
* extract the key into the system wide keytab:
sudo kadmin.local -q "ktadd -k /etc/krb5.keytab nfs/$(hostname -f)"
* edit /etc/default/nfs-common and enable gssd:
NEED_GSSD=y
* edit /etc/default/nfs-kernel-server and add an option to RPCSVCGSSDOPTS:
RPCSVCGSSDOPTS="-v"
* restart nfs-server
sudo systemctl restart nfs-server
* on xenial, you also have to restart nfs-config:
sudo systemctl restart nfs-config
* verify if /run/sysconfig/nfs-utils has the option we added above:
$ cat /run/sysconfig/nfs-utils
PIPEFS_MOUNTPOINT=/run/rpc_pipefs
RPCNFSDARGS=" 8"
RPCMOUNTDARGS="--manage-gids"
STATDARGS=""
RPCSVCGSSDARGS="-v"
* Verify the running rpc.gssd process. Without the fix, it won't have the
"-v" option:
ps axw|grep svcgssd|grep -v grep
4285 ? Ss 0:00 /usr/sbin/rpc.svcgssd
With the fix, right after installing the udpated packages, the option we
added to /etc/default/nfs-kernel-server will show up:
ps axw|grep svcgssd|grep -v grep
5656 ? Ss 0:00 /usr/sbin/rpc.svcgssd -v
[Regression Potential]
This is an old bug and whoever was affected by it probably worked around the
problem by now. I tried to cope with one such scenario by not just renaming the
variable we export, but exporting the correct one in addition to the old
incorrect one, but that's it. I hope this, and the explanation added to the
shell script wrapper nfs-utils.sh, is enough to help people with corner cases.
idance to testers in regression-testing the SRU.
[Other Info]
This patch was accepted in debian:
https://salsa.debian.org/debian/nfs-utils/merge_requests/2
[Original Description]
In /etc/default/nfs-kernel-server you can specify parameters for rpc.svcgssd:
# Options for rpc.svcgssd.
RPCSVCGSSDOPTS="-n"
But the variable is named incorrectly in /lib/systemd/system/rpc-
svcgssd.service:
ExecStart=/usr/sbin/rpc.svcgssd $SVCGSSDARGS
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