Sharing a unix socket between a Docker container and it's host

README.md

• Build the image from the Dockerfile above:

docker build --rm -t cberg-test .

• Run a container, sharing the host dir /root/foo:

docker run --rm -v /root/foo:/foo cberg-test

• In another shell, write something to the socket (which was created in /root/foo by the container):

echo 'hello docker' | socat - UNIX-CONNECT:/root/foo/bar.sock

• See the output of the container in the first shell:

hello docker

Dockerfile

FROM ubuntu

RUN apt-get update
RUN apt-get install -y socat

VOLUME /foo

CMD socat UNIX-LISTEN:/foo/bar.sock -

FROM alpine
RUN apk --update add socat
CMD socat UNIX-LISTEN:/foo/bar.sock -

in mac, i got connection refused error

docker run --name mysql-server -t
-v /var/run/mysqld:/var/run/mysqld
-d mysql:5.7
--socket=/var/run/mysqld/mysqld.sock
It does not work well ,when i ru the command docker logs mysql-server ,then found this:
[ERROR] Could not create unix socket lock file /var/run/mysqld/mysqld.sock.lock.

in mac, i got connection refused error

Yes, because on the Mac Docker is running in a little Linux VM which is not the same machine as your Mac. Hence, no socket-based communication between the two. :-(