Just copying is not enough sometimes. If you want to clone some production images to your dev/test environment you need to change some params in production imag

Just copying is not enough sometimes. If you want to clone some production images to your dev/test environment you need to change some params in production image to make it work. For example, if you have nginx in production environment that proxies queries to set of upstreams it's necessary to change server addresses in that upstream to local dev servers.