Public bug reported:
Snaps with classic confinement, like conjure-up, cannot be installed
when $HOME is on NFS.
On Ubuntu Xenial server, with snapd 2.25, running conjure-up 2.2.2 fails:
$ conjure-up
cannot create user data directory: /home/ubuntu/snap/conjure-up/549: Permission
denied
$ mount | grep home
node09ob28.maas:/mnt/nfs/ubuntu on /home/ubuntu type nfs4
(rw,relatime,vers=4.0,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,port=0,timeo=600,retrans=2,sec=sys,clientaddr=172.27.28.117,local_lock=none,addr=172.27.28.116)
$ grep -i denied /var/log/syslog
Aug 15 23:35:11 node09ob28 kernel: [ 902.908181] audit: type=1400
audit(1502840111.290:34): apparmor=“DENIED” operation=“sendmsg”
profile="/snap/core/2462/usr/lib/snapd/snap-confine" pid=17018
comm=“snap-confine” laddr=172.27.28.117 lport=823 faddr=172.27.28.116
fport=2049 family=“inet” sock_type=“stream” protocol=6 requested_mask=“send”
denied_mask=“send"
Aug 15 23:35:11 node09ob28 kernel: [ 902.908200] audit: type=1400
audit(1502840111.290:35): apparmor=“DENIED” operation=“sendmsg”
profile=”/snap/core/2462/usr/lib/snapd/snap-confine" pid=17018
comm=“snap-confine” laddr=172.27.28.117 lport=823 faddr=172.27.28.116
fport=2049 family=“inet” sock_type=“stream” protocol=6 requested_mask=“send”
denied_mask=“send"
Aug 15 23:35:11 node09ob28 kernel: [ 902.908215] audit: type=1400
audit(1502840111.290:36): apparmor=“DENIED” operation=“sendmsg”
profile=”/snap/core/2462/usr/lib/snapd/snap-confine" pid=17018
comm=“snap-confine” laddr=172.27.28.117 lport=823 faddr=172.27.28.116
fport=2049 family=“inet” sock_type=“stream” protocol=6 requested_mask=“send”
denied_mask=“send”
NFS server configuration
$ cat /etc/exports
/mnt/nfs *(rw,sync,no_root_squash)
** Affects: snapd (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1713767
Title:
Snaps with classic confinement and /home on NFS
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