Steps to reproduce:

1. I downloaded Ubuntu 18.04.4 and installed it on a virtual machine.
2. I have installed apache2, mysql-server, php, php7.2-cli, php7.2-mysql, php7.2-common, php7.2-curl, php7.2-json, php7.2-cgi, libapache2-mod-php7.2, php7.2.
3. I have installed zabbix-release_4.5-1+bionic_all.deb.
4. I have installed zabbix-server-mysql, zabbix-frontend-php, zabbix-apache-conf, zabbix-agent2.
5. I set up a MySQL database version 14.14.
6. I made a basic setup /etc/zabbix/zabbix_server.conf and /etc/zabbix/zabbix_agent2.conf and started the services.

1. Add Template App Docker to Zabbix server in Zabbix webconsole.
2. I launched Docker Containers on the same VM.

Result:

Error "Not supported".

See screenshot...

1. zabbix_get -s 127.0.0.1 -k docker.ping

0

# zabbix_get -s 127.0.0.1 -k docker.info

ZBX_NOTSUPPORTED: Cannot fetch data.

Expected:
Getting Docker Containers Metrics.