[Tarantool-patches] [PATCH v4 7/8] lua/log: allow to configure logging without a box

[Oleg Babin]

Hi! It's ok I think. box.cfg table stores user-defined values.
But it's a good point. There is an example of similar behaviour[1]:

```
tarantool> box.cfg{listen = 0}
---
...

tarantool> box.cfg.listen
---
- '0'
...

tarantool> box.info.listen
---
- '[::]:64991'
...
```

box.cfg.listen is "0" because you acually specify it by hands. 
box.info.listen is real value of property.

My point in such case don't try to support consistency between box.cfg 
and log.cfg. But:
   - log.cfg should always store an actual value of parameters
   - box.info (maybe, but not box.cfg) should also do it.

I hope it's appropriate stay it as is but file an issue to fix such it 
in future. It won't breaking change for existing installations (that 
doesn't use log.cfg{})

[1] https://github.com/tarantool/tarantool/issues/4620

On 29/05/2020 11:41, Leonid Vasiliev wrote:
 > Hi! Thank you for the patch.
 > See some comments below.

...

 >
 > tarantool> log.cfg{log_level = 2}
 > ---
 > ...
 >
 > tarantool> box.cfg.log_level
 > ---
 > - 3
 > ...
 >
 > tarantool> log.cfg.log_level
 > ---
 > - 2
 > ...