Sergey, thanks for review. 
 
The reason is that each temporary docker image is about 5 GB and we don’t have space to keep it localy.
I will update commit message.
 
Среда, 20 мая 2020, 11:31 +03:00 от Sergey Bronnikov <sergeyb@tarantool.org>:
 
Hi, Oleg!

generally LGTM, but see my question regarding commit message.

On 03:36 Wed 20 May , Oleg Piskunov wrote:
>
>
> - add cleanup after perf docker
>   image preparation (perf_bootstrap job).
> - cleanup perf docker images on execution hosts
>   after perf testing (cleanup stage).
>  
> Closes #5003

There is a best practice to explain 'what' and 'why' in a commit message
body. It is unclear why we should cleanup these images and cannot reuse
existed images.

<snipped>
 
 
--
Oleg Piskunov