Configure systemd-coredump on all nodes

[LukeHandle]

Currently the default config is that apport will hijack the core_pattern at start:

root@edge:~# cat /proc/sys/kernel/core_pattern
|/usr/share/apport/apport %p %s %c %d %P %E

We can instead make use of systemd-coredump which handily dumps the trace to jounald:

systemd-coredump[1879]: Process 486 (systemd-timesyn) of user 102 dumped core.

                                                           Stack trace of thread 486:
                                                           #0  0x00007f4d846995ce epoll_wait (libc.so.6 + 0x1225ce)
                                                           [...trimmed...]

The original files are still accessible as well:

root@edge:~# ls -al /var/lib/systemd/coredump
total 372
drwxr-xr-x  2 root root   4096 May 12 17:04 .
drwxr-xr-x 10 root root   4096 May 12 17:01 ..
-rw-r-----  1 root root 367543 May 12 17:04 core.systemd-timesyn.102.f033ea8366fd4952944bc4709b561e37.486.1620839062000000000000.lz4

root@edge:~# coredumpctl
TIME                            PID   UID   GID SIG COREFILE  EXE
Wed 2021-05-12 17:04:23 UTC     486   102   104  11 present   /usr/lib/systemd/systemd-timesyncd

root@edge:~# coredumpctl info 486
           PID: 486 (systemd-timesyn)
           UID: 102 (systemd-timesync)
           GID: 104 (systemd-timesync)
        Signal: 11 (SEGV)
     Timestamp: Wed 2021-05-12 17:04:22 UTC (1min 51s ago)
  Command Line: /lib/systemd/systemd-timesyncd
    Executable: /usr/lib/systemd/systemd-timesyncd
[...trimmed...]