[systemd-devel] journal: how to query journal to see ALL output of given unit?

[Mantas Mikulėnas]

On Tue, Jan 7, 2014 at 11:19 PM, Warpme <warpme at o2.pl> wrote:
> On 06/01/14 21:52, Zbigniew Jędrzejewski-Szmek wrote:
>>
>> journalctl -o verbose for mysqld-check.sh
>
> Zbyszku,
>
> Here is output for 'journalctl SYSLOG_IDENTIFIER=mysqld-check.sh -o verbose'
>
> Sat 2014-01-04 23:32:07.364159 CET
> [s=bd641dc956b04278a26115fa814b910a;i=4365;b=1fad31caaf1e48348c9d4403b7d68ff6;m=2689289;t=4ef2c98c3163f;x=dc153004a
>     _TRANSPORT=stdout
>     PRIORITY=6
>     SYSLOG_FACILITY=3
>     _UID=0
>     _GID=0
>     _MACHINE_ID=beb0f0a1c2c303b17213bb8d4a87a3a6
>     _HOSTNAME=mythtv
>     _CAP_EFFECTIVE=1fffffffff
>     _BOOT_ID=1fad31caaf1e48348c9d4403b7d68ff6
>     SYSLOG_IDENTIFIER=mysqld-check.sh
>     MESSAGE=--> mysqld: No need to check MythTV DB. Stop was clean...
>     _PID=807
>     _COMM=mysqld-check.sh
>
>
>
>
>
> And here is exemplary output for mysqld:
>
> Mon 2014-01-06 16:24:36.037183 CET
> [s=6d5ef6e5ef9e413fbcb7fca114dd8465;i=43cb;b=5bbb0bb34be64b14886ed38600badb66;m=41e23ff;t=4ef4edb81a63f;x=b9e5fbfb9
>     _TRANSPORT=stdout
>     PRIORITY=6
>     SYSLOG_FACILITY=3
>     _UID=0
>     _GID=0
>     _SYSTEMD_SLICE=system.slice
>     _MACHINE_ID=beb0f0a1c2c303b17213bb8d4a87a3a6
>     _HOSTNAME=mythtv
>     _CAP_EFFECTIVE=1fffffffff
>     SYSLOG_IDENTIFIER=su
>     _COMM=su
>     _EXE=/bin/su
>     _CMDLINE=/bin/su mysql -c /usr/bin/mysqld
> --defaults-file=/etc/mysql/my.cnf --datadir=/var/lib/mysql
> --socket=/var/run/mysqld/mysqld.sock
>     _SYSTEMD_CGROUP=/system.slice/mysqld.service
>     _SYSTEMD_UNIT=mysqld.service
>     _BOOT_ID=5bbb0bb34be64b14886ed38600badb66
>     _PID=1478
>     MESSAGE=Version: '5.5.24'  socket: '/var/run/mysqld/mysqld.sock'  port:
> 3306  Source distribution

It could be that the script exits before journald has a chance to read
its cgroup information – it's a known limitation which AFAIK needs
minor kernel changes (or maybe kdbus?).


-- 
Mantas Mikulėnas <grawity at gmail.com>