[SOLVED] Problem LXC mariadb debian 10

P

popallo

Well-Known Member
Jul 2, 2019
36
6
48
France
apacher.eu
People hi! :)

I just noticed an anomaly on a lxc container freshly installed with a debian 10 template.
Indeed, after installing the container I launched an "apt update && apt-upgrade" then "apt install mariadb-server".
Here is the error message I just had:

Code: 
systemctl status mariadb.service
● mariadb.service - MariaDB 10.3.15 database server
   Loaded: loaded (/lib/systemd/system/mariadb.service; enabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Sun 2019-07-14 13:00:21 CEST; 13s ago
     Docs: man:mysqld(8)
           https://mariadb.com/kb/en/library/systemd/
 Main PID: 1296 (code=exited, status=226/NAMESPACE)

Jul 14 13:00:20 mariadb systemd[1]: Starting MariaDB 10.3.15 database server...
Jul 14 13:00:21 mariadb systemd[1296]: mariadb.service: Failed to set up mount namespacing: Permission denied
Jul 14 13:00:21 mariadb systemd[1296]: mariadb.service: Failed at step NAMESPACE spawning /usr/sbin/mysqld: Permission denied
Jul 14 13:00:21 mariadb systemd[1]: mariadb.service: Main process exited, code=exited, status=226/NAMESPACE
Jul 14 13:00:21 mariadb systemd[1]: mariadb.service: Failed with result 'exit-code'.
Jul 14 13:00:21 mariadb systemd[1]: Failed to start MariaDB 10.3.15 database server.

By doing the same manipulation but with a debian template 9, I do not have this problem.

An idea ?

My server runs on debian 9 and proxmox 5.4-11 and lxc container on debian 10.
 
LnxBil said:
@tom Maybe if Debian Buster is detected, LXC should automatically enable nesting?
Click to expand...

we leave this decision to the user, as there are some implications to using nesting (such as exposing /proc and /sys from the host)
 
It seems like this problem ist till not solved on 6.0.9:


root@db1:~# systemctl status mariadb.service
* mariadb.service - MariaDB 10.4.8 database server
Loaded: loaded (/lib/systemd/system/mariadb.service; enabled; vendor preset: enabled)
Drop-In: /etc/systemd/system/mariadb.service.d
`-migrated-from-my.cnf-settings.conf
Active: failed (Result: exit-code) since Sat 2019-11-02 21:28:27 UTC; 28s ago
Docs: man:mysqld(8)
https://mariadb.com/kb/en/library/systemd/
Process: 329 ExecStart=/usr/sbin/mysqld $MYSQLD_OPTS $_WSREP_NEW_CLUSTER $_WSREP_START_P
Process: 177 ExecStartPre=/bin/sh -c [ ! -e /usr/bin/galera_recovery ] && VAR= || VAR=
Process: 170 ExecStartPre=/bin/sh -c systemctl unset-environment _WSREP_START_POSITION (
Process: 155 ExecStartPre=/usr/bin/install -m 755 -o mysql -g root -d /var/run/mysqld (c
Main PID: 329 (code=exited, status=1/FAILURE)
Status: "MariaDB server is down"

Nov 02 21:28:27 db1 systemd[1]: Starting MariaDB 10.4.8 database server...
Nov 02 21:28:27 db1 mysqld[329]: 2019-11-02 21:28:27 0 [Warning] option 'max_allowed_packe
Nov 02 21:28:27 db1 mysqld[329]: 2019-11-02 21:28:27 0 [Note] /usr/sbin/mysqld (mysqld 10.
Nov 02 21:28:27 db1 mysqld[329]: 2019-11-02 21:28:27 0 [Warning] Can't create test file /v
Nov 02 21:28:27 db1 mysqld[329]: 2019-11-02 21:28:27 0 [ERROR] mysqld: File '/var/log/mysq
Nov 02 21:28:27 db1 mysqld[329]: 2019-11-02 21:28:27 0 [ERROR] Aborting
Nov 02 21:28:27 db1 systemd[1]: mariadb.service: Main process exited, code=exited, status=
root@db1:~# systemctl stop mariadb.service

I can't start the mariadb service inside the container, even not with nested=1 This makes lxc more or less unusable for me ... This whole lxc stuff looks pretty buggy ...
 
Hmm, i just created a new unpriviledged Debian 10 container on PVE 6.0-9 from the PVE template (pveam) on ZFS, activated nesting, installed mariadb and it worked:

Code: 
root@test:~# systemctl status mariadb
● mariadb.service - MariaDB 10.3.17 database server
   Loaded: loaded (/lib/systemd/system/mariadb.service; enabled; vendor preset: enabled)
   Active: active (running) since Sun 2019-11-03 06:31:16 UTC; 12s ago
     Docs: man:mysqld(8)
           https://mariadb.com/kb/en/library/systemd/
Main PID: 1224 (mysqld)
   Status: "Taking your SQL requests now..."
    Tasks: 31 (limit: 4592)
   Memory: 64.9M
   CGroup: /system.slice/mariadb.service
           └─1224 /usr/sbin/mysqld

Nov 03 06:31:19 test /etc/mysql/debian-start[1262]: Running 'mysqlcheck' with connection arguments: --socket='/var/run/mysqld/mysqld.sock' --host='localhost' --socket='/var/run/mysqld/mysqld.sock' --host='localhost' --socket='/var/run/mysqld/mysqld.sock'
Nov 03 06:31:19 test /etc/mysql/debian-start[1262]: # Connecting to localhost...
Nov 03 06:31:19 test /etc/mysql/debian-start[1262]: # Disconnecting from localhost...
Nov 03 06:31:19 test /etc/mysql/debian-start[1262]: Processing databases
Nov 03 06:31:19 test /etc/mysql/debian-start[1262]: information_schema
Nov 03 06:31:19 test /etc/mysql/debian-start[1262]: performance_schema
Nov 03 06:31:19 test /etc/mysql/debian-start[1262]: Phase 7/7: Running 'FLUSH PRIVILEGES'
Nov 03 06:31:19 test /etc/mysql/debian-start[1262]: OK
Nov 03 06:31:19 test /etc/mysql/debian-start[1768]: Checking for insecure root accounts.
Nov 03 06:31:19 test /etc/mysql/debian-start[1778]: Triggering myisam-recover for all MyISAM tables and aria-recover for all Aria tables

EDIT: Works also with Ubuntu 19.04 and 19.10
 
Last edited:
sorry folks, this was my fault, the lxc ran with unpriviledged = no, now all ist fine with

#database server
#
#db1.toko.loc
#IP 192.168.4.16
#Gateway 10.10.10.16
arch: amd64
cores: 2
hostname: db1
memory: 1024
nameserver: 10.10.10.1
net0: name=eth0,bridge=vmbr1,gw=10.10.10.1,hwaddr=7A:D2:B9:3A:80:1A,ip=10.10.10.16/24,type=veth
onboot: 1
ostype: ubuntu
rootfs: local:106/vm-106-disk-0.raw,size=16G
searchdomain: netzwissen-toko.loc
startup: order=1
swap: 1024
unprivileged: 1
 
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