by Devin Yang
(This article was automatically translated.)

Published - 1 year ago ( Updated - 1 year ago )

You can check the docker version, confirm that the version is Docker v20.10+
you can add extra_hosts as follows:

#=== php service ==========================
 php:
  build:
    context: ./dockerfiles
    dockerfile: Dockerfile-php82-${CPU-x86_64}
    args:
      USER_ID: ${USER_ID-1000}
      GROUP_ID: ${GROUP_ID-1000}
  image: ${PROJECT}_php
  extra_hosts:
    - "host.docker.internal:host-gateway"

In this way, we can ping to the host.

dlaravel@37bc03f69cc5:/var/www/html$ ping host.docker.internal
PING host.docker.internal (172.17.0.1) 56(84) bytes of data.
64 bytes from host.docker.internal (172.17.0.1): icmp_seq=1 ttl=64 time=0.049 ms
64 bytes from host.docker.internal (172.17.0.1): icmp_seq=2 ttl=64 time=0.067 ms
64 bytes from host.docker.internal (172.17.0.1): icmp_seq=3 ttl=64 time=0.061 ms
64 bytes from host.docker.internal (172.17.0.1): icmp_seq=4 ttl=64 time=0.056 ms
64 bytes from host.docker.internal (172.17.0.1): icmp_seq=5 ttl=64 time=0.058 ms
64 bytes from host.docker.internal (172.17.0.1): icmp_seq=6 ttl=64 time=0.047 ms
64 bytes from host.docker.internal (172.17.0.1): icmp_seq=7 ttl=64 time=0.059 ms
64 bytes from host.docker.internal (172.17.0.1): icmp_seq=8 ttl=64 time=0.059 ms
64 bytes from host.docker.internal (172.17.0.1): icmp_seq=9 ttl=64 time=0.067 ms
64 bytes from host.docker.internal (172.17.0.1): icmp_seq=10 ttl=64 time=0.086 ms

Maybe you will be curious about where the IP of 172.17.0.1 can be seen, we can use it, and we can find it
Because host-gateway is our default bridge network ip.

docker inspect bridge|grep Gateway
                    "Gateway": "172.17.0.1"

Tags: docker phpenv

Devin Yang

Feel free to ask me, if you don't get it.:)

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