podman/docs/source/markdown/options/log-opt.md

--log-opt=name=value

Logging driver specific options.

Set custom logging configuration. The following names are supported:

path: specify a path to the log file (e.g. --log-opt path=/var/log/container/mycontainer.json);

max-size: specify a max size of the log file (e.g. --log-opt max-size=10mb);

tag: specify a custom log tag for the container (e.g. --log-opt tag="{{.ImageName}}". It supports the same keys as podman inspect --format. This option is currently supported only by the journald log driver.