MySQL stopped and it can't be restart

Hi there,

I have a big issue on my droplet.

Today, after pull from my git repo, I install a php extension (imagick).

After that, mysql began to start/stop frequenty, and now I am not able to restart it.

If i try:

sudo service mysql restart

It says me

Job for mysql.service failed because the control process exited with error code. See "systemctl status mysql.service" and "journalctl -xe" for details.

Log of journalctl -xe says:

-- Subject: Unit mysql.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit mysql.service has failed.
-- 
-- The result is failed.
Apr 25 10:41:38 wordpress-512mb-ams3-01 systemd[1]: mysql.service: Unit entered failed state.
Apr 25 10:41:38 wordpress-512mb-ams3-01 systemd[1]: mysql.service: Failed with result 'exit-code'.
Apr 25 10:41:38 wordpress-512mb-ams3-01 systemd[1]: mysql.service: Service hold-off time over, scheduling restart.
Apr 25 10:41:38 wordpress-512mb-ams3-01 systemd[1]: Stopped MySQL Community Server.
-- Subject: Unit mysql.service has finished shutting down
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit mysql.service has finished shutting down.
Apr 25 10:41:38 wordpress-512mb-ams3-01 systemd[1]: Starting MySQL Community Server...
-- Subject: Unit mysql.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unit mysql.service has begun starting up.
Apr 25 10:41:38 wordpress-512mb-ams3-01 audit[3864]: AVC apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/proc/3864/status" pid=3864 comm="mysqld" requested_mask="r" denied_mask="r" fsuid=112 ouid=112
Apr 25 10:41:38 wordpress-512mb-ams3-01 kernel: audit: type=1400 audit(1493116898.796:1567): apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/proc/3864/status" pid=3864 comm="mysqld" requested_mask="r" denied_mask="r" fsuid=112 ouid=112
Apr 25 10:41:38 wordpress-512mb-ams3-01 audit[3864]: AVC apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/sys/devices/system/node/" pid=3864 comm="mysqld" requested_mask="r" denied_mask="r" fsuid=112 ouid=0
Apr 25 10:41:38 wordpress-512mb-ams3-01 audit[3864]: AVC apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/proc/3864/status" pid=3864 comm="mysqld" requested_mask="r" denied_mask="r" fsuid=112 ouid=112
Apr 25 10:41:38 wordpress-512mb-ams3-01 kernel: audit: type=1400 audit(1493116898.812:1568): apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/sys/devices/system/node/" pid=3864 comm="mysqld" requested_mask="r" denied_mask="r" fsuid=112 ouid=0
Apr 25 10:41:38 wordpress-512mb-ams3-01 kernel: audit: type=1400 audit(1493116898.812:1569): apparmor="DENIED" operation="open" profile="/usr/sbin/mysqld" name="/proc/3864/status" pid=3864 comm="mysqld" requested_mask="r" denied_mask="r" fsuid=112 ouid=112
Apr 25 10:41:39 wordpress-512mb-ams3-01 systemd[1]: mysql.service: Main process exited, code=exited, status=1/FAILURE

And finally, /var/log/mysql/error.log says:

2017-04-25T10:45:43.868541Z 0 [ERROR] InnoDB: Plugin initialization aborted with error Generic error
2017-04-25T10:45:43.868576Z 0 [ERROR] Plugin 'InnoDB' init function returned error.
2017-04-25T10:45:43.868596Z 0 [ERROR] Plugin 'InnoDB' registration as a STORAGE ENGINE failed.
2017-04-25T10:45:43.868615Z 0 [ERROR] Failed to initialize plugins.
2017-04-25T10:45:43.868629Z 0 [ERROR] Aborting

2017-04-25T10:45:43.868673Z 0 [Note] Binlog end
2017-04-25T10:45:43.868837Z 0 [Note] Shutting down plugin 'CSV'
2017-04-25T10:45:43.869563Z 0 [Note] /usr/sbin/mysqld: Shutdown complete

Any help would be appreciated, thank you in advance.