Thank you for your advice.
The default settings were:
process.cgroups.enabled: true
https://www.elastic.co/guide/en/beats/metricbeat/current/metricbeat-module-system.html
And disabled other default settings below. It worked fine.
/etc/metricbeat/modules.d/system.yml:
# process.include_top_n: # by_cpu: 5 # include top 5 processes by CPU # by_memory: 5 # include top 5 processes by memory
I was able to get the value with kibana.
Thank you !
Dashboard [Metricbeat System] Containers overview ECS Container CPU usage [Metricbeat System] ECS "Container ID","Process name","CPU user"... "libpod-56677f94b50a7cd0b4472a41b1ec6e16bda7e832a5f3c2c477339b47d799e0b0.scope","nginx","1,310,150,000,000"... Container Memory stats [Metricbeat System] ECS "Container ID","Process name","Usage"... "libpod-56677f94b50a7cd0b4472a41b1ec6e16bda7e832a5f3c2c477339b47d799e0b0.scope","nginx","6447104"... Container Block IO [Metricbeat System] ECS "Container ID","Process name",Total,"I/O" "libpod-56677f94b50a7cd0b4472a41b1ec6e16bda7e832a5f3c2c477339b47d799e0b0.scope","nginx","23126016,276"