Is it possible to reach localhost from the container?

Question

Docker

tried php:7.2-apache image and webdevops/apache-dev:7.2.
Locally, there are a couple of nginx applications that run on port 80. Is it possible to reach them from the container by hostname ? It gives me 404.

Answer 1

For the localhost container, this is the container itself, so yes, you can).
To access the parent system, you must use the container's default gateway.
It can be found in two ways, the first is to find out the address on the dockerX interface:

$ ip a | grep docker
5: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default 
    inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0

Or make ip r in the container

$ sudo docker exec -it php-fpm sh
/ # ip r | grep default
default via 172.18.0.1 dev eth0

Where 172.17.0.1 is the required IP address that must be accessed from the container.