How to execute MySQL command from the host to container running MySQL server?

Question

I have followed the instruction in https://registry.hub.docker.com/_/mysql/ to pull an image and running a container in which it runs a MySQL server.

The container is run

Answer 1

I use the following to create a command that will sort out at least a couple of cases with databases outside or inside the container (with -h and -P) and supporting -e:

cat > ~/bin/mysql <<'EOF'
#/bin/bash

MARGS=()
MPORT="3306"

while test $# != 0; do
  if [[ $1 == -h ]]; then MHOST=$2; shift;
  elif [[ $1 == -h* ]]; then MHOST=${1#"-h"};
  elif [[ $1 == -e ]]; then MEXEC=$2; shift;
  elif [[ $1 == -e* ]]; then MEXEC=${1#"-e"};
  elif [[ $1 == --execute=* ]]; then MEXEC=${1#"--execute="};
  elif [[ $1 == -P ]]; then MPORT=$2; shift;
  elif [[ $1 == -P* ]]; then MPORT=${1#"-P"};
  else MARGS="$MARGS $1"
  fi

  shift;
done

if [ -z  "${MHOST+x}" ]; then
   MHOST=localhost
fi

if [ $(docker inspect --format '{{ .State.Status }}' mysql) == "running" ]; then
 if [ ! -z "${MHOST+x}" ]; then
    if [ "$MHOST" == "localhost" -o "$MHOST" == "127.0.0.1" ]; then
      CPORT=$(docker port mysql 3306/tcp)
      if [ ${CPORT#"0.0.0.0:"} == $MPORT ]; then
        #echo "aiming for container port ($MPORT -> $CPORT)";
        MHOST=$(docker inspect --format '{{ .NetworkSettings.IPAddress }}' mysql);
      else
        MHOST=$(ifconfig | sed -En 's/127.0.0.1//;s/.*inet (addr:)?(([0-9]*\.){3}[0-9]*).*/\2/p' | head -1);
      fi
    fi
  fi
fi

if [ -z "$MEXEC" ]; then
   docker run --link mysql:mysql -i --rm mysql mysql "-h" $MHOST "-P" $MPORT $MARGS
else
   docker run --link mysql:mysql -i --rm mysql mysql "-h" $MHOST "-P" $MPORT $MARGS <<< $MEXEC
fi
EOF
chmod +x ~/bin/mysql