use file-logger have a err : Permission denied

[woyouyitouchenfeijv]

use linux virtual machine
apisix - 2.12.1

I want to log to a file ，use logger-file
Because the version is lower，I modified his log method

function _M.log(conf, ctx)
local metadata = plugin.plugin_metadata(plugin_name)
local entry = log_util.get_full_log(ctx, metadata.value.log_format)
write_file_data(conf, entry)
end

but use file-logger have a err Permission denied

Manually granting permissions still doesn't work

[woyouyitouchenfeijv]

Resolved，use root start，add conf in config.yaml