Is a redirect enough in this case?

Question

Search Engine Optimization

The site lived. He lived for himself, on http. And then, once, and Yandex.Webmaster sends a notification. So and so, they say,
"
The main mirror of your site www.---.ru has changed: instead of www.---.ru, the domain https://www.---.ru has become the main one in the group of mirrors. We recommend checking that the new main mirror is available for indexing and gives the robot a code of 200.
If you are not happy with this choice, you can change the main mirror using a 301 redirect
.
, Sklifosovsky. We cannot at the momentmove to httpS. EXACTLY at the moment. We planned to do it later. (Because a lot of work needs to be done on the site, the site is very old, crooked, with http links that need to be cleaned up, and in general, before such a thing, conduct a major revision).
What's the question? I will do a 301 redirect like they say. is that enough? Or you also need to set rel="canonical" (with http)

Answer 1

Enough 301st, canonical is not needed. But leave the sitemap and robots available on the old site on http.
Help: https://yandex.ru/blog/platon/2778