[Bug 1876670] Re: nfs does not mount at boot with bridge

Mon Jul 6 14:16:08 UTC 2020

> May 06 17:35:45 bowser systemd[1]: Mounting NAS devices...
> May 06 17:35:46 bowser mount[751]: mount.nfs: Network is unreachable

it looks like your network isn't actually configured when your mount
tries to run. check your journalctl output to see what's going on. If
you can't figure it out maybe you should just add the mount to
/etc/fstab instead of crafting your own mount unit.

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https://bugs.launchpad.net/bugs/1876670

Title:
  nfs does not mount at boot with bridge

Status in systemd package in Ubuntu:
  Expired

Bug description:
  I am running a Ubuntu 20.04 server with lxd and kvm/qemu. 
  I try to connect a nfs share at boot. It is working while I do not configure any bridge with netplan. I am creating directly a systemd service for the NFS mount but I have the same problem if I edit the fstab file.

  #/etc/systemd/system/mnt-nas.mount
  [Unit]
  Description=NAS devices
  After=network.target

  [Mount]
  What=192.168.1.20:/volume2/media
  Where=/mnt/nas
  Type=nfs
  Options=_netdev,auto

  [Install]
  WantedBy=multi-user.target

  ## TEST WITHOUT BRIDGE

  #/etc/netplan/01-netcfg.yaml 
  network:
    version: 2
    renderer: networkd
    ethernets:
      eno1:
        dhcp4: yes

  root at bowser:~# ip a
  1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
      link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
      inet 127.0.0.1/8 scope host lo
         valid_lft forever preferred_lft forever
      inet6 ::1/128 scope host 
         valid_lft forever preferred_lft forever
  2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
      link/ether f8:75:a4:00:be:ad brd ff:ff:ff:ff:ff:ff
      inet 192.168.1.100/24 brd 192.168.1.255 scope global dynamic eno1
         valid_lft 86244sec preferred_lft 86244sec
      inet6 fe80::fa75:a4ff:fe00:bead/64 scope link 
         valid_lft forever preferred_lft forever
  3: wlp1s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
      link/ether 60:f2:62:38:d7:c2 brd ff:ff:ff:ff:ff:ff

  root at bowser:~# journalctl -b
  ...
  May 04 08:58:08 bowser systemd-networkd[535]: eno1: Gained carrier
  May 04 08:58:08 bowser kernel: e1000e: eno1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
  May 04 08:58:08 bowser kernel: IPv6: ADDRCONF(NETDEV_CHANGE): eno1: link becomes ready
  May 04 08:58:08 bowser systemd[1]: systemd-rfkill.service: Succeeded.
  May 04 08:58:08 bowser set-cpufreq[795]: Setting powersave scheduler for all CPUs
  May 04 08:58:08 bowser systemd[1]: ondemand.service: Succeeded.
  May 04 08:58:08 bowser systemd[1]: dmesg.service: Succeeded.
  May 04 08:58:09 bowser systemd-networkd[535]: eno1: Gained IPv6LL
  May 04 08:58:09 bowser systemd-timesyncd[757]: Network configuration changed, trying to establish connection.
  May 04 08:58:10 bowser systemd-networkd[535]: eno1: DHCPv4 address 192.168.1.100/24 via 192.168.1.1
  May 04 08:58:10 bowser systemd-timesyncd[757]: Network configuration changed, trying to establish connection.
  May 04 08:58:10 bowser systemd-timesyncd[757]: Network configuration changed, trying to establish connection.
  May 04 08:58:10 bowser systemd-timesyncd[757]: Network configuration changed, trying to establish connection.
  May 04 08:58:10 bowser systemd-networkd-wait-online[611]: managing: eno1
  May 04 08:58:10 bowser systemd[1]: Finished Wait for Network to be Configured.
  May 04 08:58:10 bowser systemd[1]: Reached target Network is Online.
  May 04 08:58:10 bowser systemd[1]: Condition check resulted in Login to default iSCSI targets being skipped.
  May 04 08:58:10 bowser systemd[1]: Reached target Remote File Systems (Pre).
  May 04 08:58:10 bowser systemd[1]: Mounting NAS devices...
  May 04 08:58:10 bowser systemd[1]: Starting Availability of block devices...
  May 04 08:58:10 bowser systemd[1]: Condition check resulted in Pollinate to seed the pseudo random number generator being skipped.
  May 04 08:58:10 bowser systemd[1]: Starting OpenBSD Secure Shell server...
  May 04 08:58:10 bowser systemd[1]: Finished Availability of block devices.
  May 04 08:58:10 bowser kernel: FS-Cache: Loaded
  May 04 08:58:10 bowser sshd[952]: Server listening on 0.0.0.0 port 22.
  May 04 08:58:10 bowser sshd[952]: Server listening on :: port 22.
  May 04 08:58:10 bowser systemd[1]: Started OpenBSD Secure Shell server.
  May 04 08:58:10 bowser kernel: FS-Cache: Netfs 'nfs' registered for caching
  May 04 08:58:10 bowser kernel: NFS: Registering the id_resolver key type
  May 04 08:58:10 bowser kernel: Key type id_resolver registered
  May 04 08:58:10 bowser kernel: Key type id_legacy registered
  May 04 08:58:10 bowser systemd[1]: /lib/systemd/system/rpc-statd.service:16: PIDFile= references a path below legacy directory /var/run/, updating /var/run/rpc.statd.pid → /run/rpc.statd.pid; please update the unit file accordingly.
  May 04 08:58:10 bowser systemd[1]: Starting Preprocess NFS configuration...
  May 04 08:58:10 bowser systemd[1]: nfs-config.service: Succeeded.
  May 04 08:58:10 bowser systemd[1]: Finished Preprocess NFS configuration.
  May 04 08:58:10 bowser systemd[1]: Starting Notify NFS peers of a restart...
  May 04 08:58:10 bowser systemd[1]: Starting NFS status monitor for NFSv2/3 locking....
  May 04 08:58:10 bowser sm-notify[962]: Version 1.3.3 starting
  May 04 08:58:10 bowser systemd[1]: rpc-statd-notify.service: Succeeded.
  May 04 08:58:10 bowser systemd[1]: Started Notify NFS peers of a restart.
  May 04 08:58:10 bowser rpc.statd[964]: Version 1.3.3 starting
  May 04 08:58:10 bowser rpc.statd[964]: Flags: TI-RPC
  May 04 08:58:10 bowser systemd[1]: Started NFS status monitor for NFSv2/3 locking..
  May 04 08:58:10 bowser systemd[1]: Mounted NAS devices.
  ...

  ## TEST WITH BRIDGE

  #/etc/netplan/01-netcfg.yaml 
  network:
    version: 2
    renderer: networkd
    ethernets:
      eno1:
        dhcp4: no
    bridges:
      br0:
        macaddress: f8:75:a4:00:be:ad
        dhcp4: yes
        interfaces: [eno1]

  root at bowser:~# ip a
  1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
      link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
      inet 127.0.0.1/8 scope host lo
         valid_lft forever preferred_lft forever
      inet6 ::1/128 scope host 
         valid_lft forever preferred_lft forever
  2: eno1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel master br0 state UP group default qlen 1000
      link/ether f8:75:a4:00:be:ad brd ff:ff:ff:ff:ff:ff
  3: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
      link/ether f8:75:a4:00:be:ad brd ff:ff:ff:ff:ff:ff
      inet 192.168.1.100/24 brd 192.168.1.255 scope global dynamic br0
         valid_lft 85658sec preferred_lft 85658sec
      inet6 fe80::fa75:a4ff:fe00:bead/64 scope link 
         valid_lft forever preferred_lft forever
  4: wlp1s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
      link/ether 60:f2:62:38:d7:c2 brd ff:ff:ff:ff:ff:ff

  root at bowser:~# journalctl -b
  ...
  May 04 07:40:14 bowser systemd-networkd[538]: eno1: Gained carrier
  May 04 07:40:14 bowser systemd-networkd[538]: br0: Gained carrier
  May 04 07:40:14 bowser kernel: e1000e: eno1 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: None
  May 04 07:40:14 bowser kernel: IPv6: ADDRCONF(NETDEV_CHANGE): eno1: link becomes ready
  May 04 07:40:14 bowser kernel: br0: port 1(eno1) entered blocking state
  May 04 07:40:14 bowser kernel: br0: port 1(eno1) entered forwarding state
  May 04 07:40:14 bowser kernel: IPv6: ADDRCONF(NETDEV_CHANGE): br0: link becomes ready
  May 04 07:40:14 bowser systemd-networkd-wait-online[609]: managing: eno1
  May 04 07:40:14 bowser systemd-networkd-wait-online[609]: managing: br0
  May 04 07:40:14 bowser systemd[1]: Finished Wait for Network to be Configured.
  May 04 07:40:14 bowser systemd[1]: Reached target Network is Online.
  May 04 07:40:14 bowser systemd[1]: Condition check resulted in Login to default iSCSI targets being skipped.
  May 04 07:40:14 bowser systemd[1]: Reached target Remote File Systems (Pre).
  May 04 07:40:14 bowser systemd[1]: Mounting NAS devices...
  May 04 07:40:14 bowser systemd[1]: Starting Availability of block devices...
  May 04 07:40:14 bowser systemd[1]: Condition check resulted in Pollinate to seed the pseudo random number generator being skipped.
  May 04 07:40:14 bowser systemd[1]: Starting OpenBSD Secure Shell server...
  May 04 07:40:14 bowser systemd[1]: Finished Availability of block devices.
  May 04 07:40:14 bowser kernel: FS-Cache: Loaded
  May 04 07:40:14 bowser sshd[934]: Server listening on 0.0.0.0 port 22.
  May 04 07:40:14 bowser sshd[934]: Server listening on :: port 22.
  May 04 07:40:14 bowser systemd[1]: Started OpenBSD Secure Shell server.
  May 04 07:40:14 bowser kernel: FS-Cache: Netfs 'nfs' registered for caching
  May 04 07:40:14 bowser kernel: NFS: Registering the id_resolver key type
  May 04 07:40:14 bowser kernel: Key type id_resolver registered
  May 04 07:40:14 bowser kernel: Key type id_legacy registered
  May 04 07:40:14 bowser mount[930]: mount.nfs: Network is unreachable
  May 04 07:40:14 bowser systemd[1]: mnt-nas.mount: Mount process exited, code=exited, status=32/n/a
  May 04 07:40:14 bowser systemd[1]: mnt-nas.mount: Failed with result 'exit-code'.
  May 04 07:40:14 bowser systemd[1]: Failed to mount NAS devices.
  May 04 07:40:14 bowser systemd[1]: Reached target Remote File Systems.
  ...

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