Trying a new setup and I get the following in the logs.
docker logs observium
*** Running /etc/my_init.d/10_syslog-ng.init...
Dec 18 10:36:10 bcba2e7b52f3 syslog-ng[14]: syslog-ng starting up; version='3.13.2'
*** Running /etc/my_init.d/firstrun.sh...
Using existing PHP database config file.
warning: commands will be executed using /bin/sh
job 1 at Tue Dec 18 10:37:00 2018
*** Booting runit daemon...
*** Runit started as PID 33
Initializing Data Directory.
Dec 18 10:36:13 bcba2e7b52f3 cron[39]: (CRON) INFO (pidfile fd = 3)
Dec 18 10:36:13 bcba2e7b52f3 cron[39]: (CRON) INFO (Running @reboot jobs)
Installation complete.
Dec 18 10:36:45 bcba2e7b52f3 mysqld_safe: Starting mysqld daemon with databases from /config/databases
Dec 18 10:36:45 bcba2e7b52f3 mysqld: 2018-12-18 10:36:45 0 [Note] /usr/sbin/mysqld (mysqld 10.3.11-MariaDB-1:10.3.11+maria~bionic-log) starting as process 329 ...
Dec 18 10:36:46 bcba2e7b52f3 mysqld: 2018-12-18 10:36:46 0 [ERROR] Could not open mysql.plugin table. Some plugins may be not loaded
Dec 18 10:36:46 bcba2e7b52f3 mysqld: 2018-12-18 10:36:46 0 [Note] InnoDB: Using Linux native AIO
Dec 18 10:36:46 bcba2e7b52f3 mysqld: 2018-12-18 10:36:46 0 [Note] InnoDB: Mutexes and rw_locks use GCC atomic builtins
Dec 18 10:36:46 bcba2e7b52f3 mysqld: 2018-12-18 10:36:46 0 [Note] InnoDB: Uses event mutexes
Dec 18 10:36:46 bcba2e7b52f3 mysqld: 2018-12-18 10:36:46 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
Dec 18 10:36:46 bcba2e7b52f3 mysqld: 2018-12-18 10:36:46 0 [Note] InnoDB: Number of pools: 1
Dec 18 10:36:46 bcba2e7b52f3 mysqld: 2018-12-18 10:36:46 0 [Note] InnoDB: Using SSE2 crc32 instructions
Dec 18 10:36:46 bcba2e7b52f3 mysqld: 2018-12-18 10:36:46 0 [Note] InnoDB: Initializing buffer pool, total size = 256M, instances = 1, chunk size = 128M
Dec 18 10:36:46 bcba2e7b52f3 mysqld: 2018-12-18 10:36:46 0 [Note] InnoDB: Completed initialization of buffer pool
Dec 18 10:36:46 bcba2e7b52f3 mysqld: 2018-12-18 10:36:46 0 [Note] InnoDB: If the mysqld execution user is authorized, page cleaner thread priority can be changed. See the man page of setpriority().
Dec 18 10:36:47 bcba2e7b52f3 mysqld: 2018-12-18 10:36:47 0 [Note] InnoDB: 128 out of 128 rollback segments are active.
Dec 18 10:36:47 bcba2e7b52f3 mysqld: 2018-12-18 10:36:47 0 [Note] InnoDB: Creating shared tablespace for temporary tables
Dec 18 10:36:47 bcba2e7b52f3 mysqld: 2018-12-18 10:36:47 0 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...
Dec 18 10:36:47 bcba2e7b52f3 mysqld: 2018-12-18 10:36:47 0 [Note] InnoDB: File './ibtmp1' size is now 12 MB.
Dec 18 10:36:47 bcba2e7b52f3 mysqld: 2018-12-18 10:36:47 0 [Note] InnoDB: 10.3.11 started; log sequence number 1630637; transaction id 23
Dec 18 10:36:47 bcba2e7b52f3 mysqld: 2018-12-18 10:36:47 0 [Note] InnoDB: Loading buffer pool(s) from /config/databases/ib_buffer_pool
Dec 18 10:36:47 bcba2e7b52f3 mysqld: 2018-12-18 10:36:47 0 [Note] InnoDB: Buffer pool(s) load completed at 181218 10:36:47
Dec 18 10:36:47 bcba2e7b52f3 mysqld: 2018-12-18 10:36:47 0 [Note] Plugin 'FEEDBACK' is disabled.
Dec 18 10:36:48 bcba2e7b52f3 mysqld: 2018-12-18 10:36:48 0 [Note] Server socket created on IP: '127.0.0.1'.
Dec 18 10:36:50 bcba2e7b52f3 mysqld: 2018-12-18 10:36:50 0 [Note] Reading of all Master_info entries succeded
Dec 18 10:36:50 bcba2e7b52f3 mysqld: 2018-12-18 10:36:50 0 [Note] Added new Master_info '' to hash table
Dec 18 10:36:50 bcba2e7b52f3 mysqld: 2018-12-18 10:36:50 0 [Note] /usr/sbin/mysqld: ready for connections.
Dec 18 10:36:50 bcba2e7b52f3 mysqld: Version: '10.3.11-MariaDB-1:10.3.11+maria~bionic-log' socket: '/var/run/mysqld/mysqld.sock' port: 3306 mariadb.org binary distribution
Dec 18 10:36:50 bcba2e7b52f3 mysqld: 2018-12-18 10:36:50 9 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:36:51 bcba2e7b52f3 mysqld: 2018-12-18 10:36:51 10 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:36:52 bcba2e7b52f3 mysqld: 2018-12-18 10:36:52 11 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:36:53 bcba2e7b52f3 mysqld: 2018-12-18 10:36:53 12 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:36:54 bcba2e7b52f3 mysqld: 2018-12-18 10:36:54 13 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:36:55 bcba2e7b52f3 mysqld: 2018-12-18 10:36:55 14 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:36:56 bcba2e7b52f3 mysqld: 2018-12-18 10:36:56 15 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:36:57 bcba2e7b52f3 mysqld: 2018-12-18 10:36:57 16 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:36:58 bcba2e7b52f3 mysqld: 2018-12-18 10:36:58 17 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:36:59 bcba2e7b52f3 mysqld: 2018-12-18 10:36:59 18 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:00 bcba2e7b52f3 mysqld: 2018-12-18 10:37:00 19 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:01 bcba2e7b52f3 mysqld: 2018-12-18 10:37:01 20 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:02 bcba2e7b52f3 mysqld: 2018-12-18 10:37:02 21 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:03 bcba2e7b52f3 mysqld: 2018-12-18 10:37:03 22 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:04 bcba2e7b52f3 mysqld: 2018-12-18 10:37:04 23 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:05 bcba2e7b52f3 mysqld: 2018-12-18 10:37:05 24 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:06 bcba2e7b52f3 mysqld: 2018-12-18 10:37:06 25 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:07 bcba2e7b52f3 mysqld: 2018-12-18 10:37:07 26 [Warning] Access denied for user 'observium'@'localhost' (using password: YES)
Dec 18 10:37:07 bcba2e7b52f3 mysqld: 2018-12-18 10:37:07 27 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:08 bcba2e7b52f3 mysqld: 2018-12-18 10:37:08 28 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:09 bcba2e7b52f3 mysqld: 2018-12-18 10:37:09 29 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:10 bcba2e7b52f3 mysqld: 2018-12-18 10:37:10 30 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:11 bcba2e7b52f3 mysqld: 2018-12-18 10:37:11 31 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:13 bcba2e7b52f3 mysqld: 2018-12-18 10:37:13 32 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:14 bcba2e7b52f3 mysqld: 2018-12-18 10:37:14 33 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:17 bcba2e7b52f3 mysqld: 2018-12-18 10:37:17 34 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:18 bcba2e7b52f3 mysqld: 2018-12-18 10:37:18 35 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:19 bcba2e7b52f3 mysqld: 2018-12-18 10:37:19 36 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:20 bcba2e7b52f3 mysqld: 2018-12-18 10:37:20 37 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:21 bcba2e7b52f3 mysqld: 2018-12-18 10:37:21 38 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:22 bcba2e7b52f3 mysqld: 2018-12-18 10:37:22 39 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:23 bcba2e7b52f3 mysqld: 2018-12-18 10:37:23 40 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:24 bcba2e7b52f3 mysqld: 2018-12-18 10:37:24 41 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:25 bcba2e7b52f3 mysqld: 2018-12-18 10:37:25 42 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:26 bcba2e7b52f3 mysqld: 2018-12-18 10:37:26 43 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:27 bcba2e7b52f3 mysqld: 2018-12-18 10:37:27 44 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:28 bcba2e7b52f3 mysqld: 2018-12-18 10:37:28 45 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:29 bcba2e7b52f3 mysqld: 2018-12-18 10:37:29 46 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:30 bcba2e7b52f3 mysqld: 2018-12-18 10:37:30 47 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:31 bcba2e7b52f3 mysqld: 2018-12-18 10:37:31 48 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:32 bcba2e7b52f3 mysqld: 2018-12-18 10:37:32 49 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:33 bcba2e7b52f3 mysqld: 2018-12-18 10:37:33 50 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:34 bcba2e7b52f3 mysqld: 2018-12-18 10:37:34 51 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:35 bcba2e7b52f3 mysqld: 2018-12-18 10:37:35 52 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:36 bcba2e7b52f3 mysqld: 2018-12-18 10:37:36 53 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:37 bcba2e7b52f3 mysqld: 2018-12-18 10:37:37 54 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:38 bcba2e7b52f3 mysqld: 2018-12-18 10:37:38 55 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:39 bcba2e7b52f3 mysqld: 2018-12-18 10:37:39 56 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:40 bcba2e7b52f3 mysqld: 2018-12-18 10:37:40 57 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:41 bcba2e7b52f3 mysqld: 2018-12-18 10:37:41 58 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:42 bcba2e7b52f3 mysqld: 2018-12-18 10:37:42 59 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:44 bcba2e7b52f3 mysqld: 2018-12-18 10:37:44 60 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:45 bcba2e7b52f3 mysqld: 2018-12-18 10:37:45 61 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:46 bcba2e7b52f3 mysqld: 2018-12-18 10:37:46 62 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:47 bcba2e7b52f3 mysqld: 2018-12-18 10:37:47 63 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:48 bcba2e7b52f3 mysqld: 2018-12-18 10:37:48 64 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:49 bcba2e7b52f3 mysqld: 2018-12-18 10:37:49 65 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:50 bcba2e7b52f3 mysqld: 2018-12-18 10:37:50 66 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:51 bcba2e7b52f3 mysqld: 2018-12-18 10:37:51 67 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:52 bcba2e7b52f3 mysqld: 2018-12-18 10:37:52 68 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:53 bcba2e7b52f3 mysqld: 2018-12-18 10:37:53 69 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:54 bcba2e7b52f3 mysqld: 2018-12-18 10:37:54 70 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:55 bcba2e7b52f3 mysqld: 2018-12-18 10:37:55 71 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:56 bcba2e7b52f3 mysqld: 2018-12-18 10:37:56 72 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:57 bcba2e7b52f3 mysqld: 2018-12-18 10:37:57 73 [Warning] Access denied for user 'root'@'localhost' (using password: NO)
Dec 18 10:37:59 bcba2e7b52f3 mysqld: 2018-12-18 10:37:59 74 [Warning] Access denied for user 'root'@'localhost' (using password: NO)