[Bug 1907141] Re: blkmapd: open pipe file /run/rpc_pipefs/nfs/blocklayout failed: No such file or directory

[Thomas Debesse]

In fact the modprobe only workarounds one problem, the service is still
failing.

Before `modprobe blocklayoutdriver`, I got that:

```
Starting pNFS block layout mapping daemon...
open pipe file /run/rpc_pipefs/nfs/blocklayout failed: No such file or directory
Started pNFS block layout mapping daemon.
nfs-blkmap.service: Main process exited, code=killed, status=6/ABRT
nfs-blkmap.service: Failed with result 'signal'.
```

After, I get that:

```
Starting pNFS block layout mapping daemon...
nfs-blkmap.service: Can't open PID file /run/blkmapd.pid (yet?) after start: Operation not permitted
Started pNFS block layout mapping daemon.
nfs-blkmap.service: Main process exited, code=killed, status=6/ABRT
nfs-blkmap.service: Failed with result 'protocol'.
```

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https://bugs.launchpad.net/bugs/1907141

Title:
  blkmapd: open pipe file /run/rpc_pipefs/nfs/blocklayout failed: No
  such file or directory

Status in nfs-utils package in Ubuntu:
  Confirmed
Status in nfs-utils package in Debian:
  New

Bug description:
  for a long time I have seen such an error in the boot log

  Dec 07 21:00:07 homl blkmapd[267]: open pipe file
  /run/rpc_pipefs/nfs/blocklayout failed: No such file or directory

  while the NFS works without problems 
  recently found a solution to this error
  https://bugzilla.redhat.com/show_bug.cgi?id=1753870

  add kernel module pre-load to the unit

  # /etc/systemd/system/nfs-blkmap.service.d/override.conf
  [Service]
  ExecStartPre=/usr/sbin/modprobe blocklayoutdriver

  and the next time the system boots this error did not appear

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