bug#23064: herd has incomplete status reporting, not so helpful

[Danny Milosavljevic]

Hi Ludo,

> Could you try this and report back?

$ patch -p1 < ...
$ sudo ./pre-inst-env guix system reconfigure /etc/config.scm
$ sudo herd stop postgres
$ sudo herd start postgres
Service postgres has been started.
$ tail -f /var/log/messages 
Mar 22 20:15:51 localhost nscd: 213 monitored file `/etc/services` was created, 
adding watch
Mar 22 20:15:51 localhost nscd: 213 monitored file `/etc/services` was written 
to
Mar 22 20:20:40 localhost postgres[2115]: [1-1] FATAL:  database files are 
incompatible with server
Mar 22 20:20:40 localhost postgres[2115]: [1-2] DETAIL:  The data directory was 
initialized by PostgreSQL version 9.3, which is not compatible with this 
version 9.5.1.
...

Nice :-)

Thanks!

Although it would be nice to have shepherd have a field in "herd status" which 
tells you when it respawned the service in < 1 s intervals (or maybe if it 
respawned it < 1 s after the initial start) - or maybe just how long ago it was 
(last) started and when the actual herd start command was :-)