The Docker plugin for Zabbix Agent2 does not collect the I/O block, but even the docker stat command shows this important metric.{}

Steps to reproduce:

1. Install Zabbix Agent 2 with Docker plugin
2. Wait autoidiscovery
3. Check lastest data
4. Check "docker stat" output

Result:
No disk IO data

Expected:

Any type of IO metrics.

This has already been discussed on the forum : https://www.zabbix.com/forum/zabbix-troubleshooting-and-problems/457834-zabbix-agent2-docker-container-discovery-handles-cpu-mem-etc-but-not-block-io
Other exporters like cadvisor show this metrics.

Some kind of raw disk IO information may be obtained by requesting docker socket:

curl --silent --unix-socket /var/run/docker.sock  http://v1.41/containers/zabbix-zabbix-server-1/stats?stream=false&one-shot=true