Create environment variables for docker containers on the host machine

gistfile1.sh

#!/bin/bash

# Create environment variables for docker containers on the host machine

containers=(
  "DB0:postgres"
  "ES0:elasticsearch"
  "REDIS0:redis"
)

for c in "${containers[@]}"; do
  ALIAS="${c%%:*}"
  CONTAINER="${c##*:}"

  ip=$(docker inspect -format='{{ .NetworkSettings.IPAddress }}' $CONTAINER)
  # Only gets first exposed port for now
  port=($(docker inspect -format='{{ .NetworkSettings.Ports  }}' $CONTAINER | sed "s/^map\[\([0-9]*\)\/\([a-z]\{3,\}\).*\]/\1 \2/"))

  export "${ALIAS}_PORT_${port[0]}_${port[1]^^}"=${port[1]}://$ip:${port[0]}
  export "${ALIAS}_PORT_${port[0]}_${port[1]^^}_PROTO"=$ip:${port[0]}
  export "${ALIAS}_PORT_${port[0]}_${port[1]^^}_ADDR"=$ip
  export "${ALIAS}_PORT_${port[0]}_${port[1]^^}_PORT"=${port[0]}
done