mariadb won't start with mapped volume /var/lib/mysql

[sebastian-haendel]

To keep the database on updates and for backup reasons, i tried to start the piler with the following compose file:

version: '3.3'
services:
piler:
image: woa7/piler
ports:
- 80:80
- 25:25
user: 0:0
environment:
- TZ=Europe/Berlin
- PILER_HOST=mailarchiv.test.de
- PUID=1000
- PGID=1000
volumes:
- /usr/share/zoneinfo/Europe/Berlin:/etc/localtime
- /opt/piler/etc/piler:/etc/piler
- /opt/piler/var/piler:/var/piler
- /opt/piler/var/lib/mysql:/var/lib/mysql

Here the log:

...
User uid: 1000
User gid: 1000

[cont-init.d] 10-adduser: exited 0.
[cont-init.d] 99-custom-scripts: executing...
[custom-init] no custom files found exiting...
[cont-init.d] 99-custom-scripts: exited 0.
[cont-init.d] done.
[services.d] starting services
[services.d] done.

• Starting enhanced syslogd rsyslogd
  rsyslogd: imklog: cannot open kernel log (/proc/kmsg): Operation not permitted.
  rsyslogd: activation of module imklog failed [v8.32.0 try http://www.rsyslog.com/e/2145 ]
  ...done.
• Starting MariaDB database server mysqld
  ...fail!
  [cmd] /bin/bash exited 1
  [cont-finish.d] executing container finish scripts...
  [cont-finish.d] done.
  [s6-finish] waiting for services.
  [s6-finish] sending all processes the TERM signal.
  [s6-finish] sending all processes the KILL signal and exiting.

[sebastian-haendel]

When i use NFS Volumes everything works:

version: '3.3'
services:
piler:
image: woa7/piler
ports:
- 80:80
- 25:25
environment:
- TZ=Europe/Berlin
- PILER_HOST=mailarchiv.test.de
- PUID=1000
- PGID=1000
volumes:
- /usr/share/zoneinfo/Europe/Berlin:/etc/localtime
- piler-etc:/etc/piler
- piler-var:/var/piler
- piler-mysql:/var/lib/mysql
- nginx-log:/var/log/nginx
volumes:
piler-etc:
driver: local
driver_opts:
type: nfs
device: ":/piler/piler-etc"
o: "addr=192.168.0.35,nolock,soft,rw"
piler-var:
driver: local
driver_opts:
type: nfs
device: ":/piler/piler-var"
o: "addr=192.168.0.35,nolock,soft,rw"
piler-mysql:
driver: local
driver_opts:
type: nfs
device: ":/piler/piler-mysql"
o: "addr=192.168.0.35,nolock,soft,rw"
nginx-log:
driver: local
driver_opts:
type: nfs
device: ":/piler/nginx-log"
o: "addr=192.168.0.35,nolock,soft,rw"