docker-samba/example/docker-compose.yml

version: '3.4'

networks:
  br-samba:
      external: false

services:
  samba:
    image: exp
    networks:
      - br-samba
    ports:
      - "137:137/udp"
      - "138:138/udp"
      - "139:139/tcp"
      - "445:445/tcp"
    environment:
      # create two users: "user1" with uid 1000, smb password password1 and add user1 to group1
      #                   "user2" with uid 1001, smb password password2 and add user2 to group1 and group2
      - "USERS=user1,1000,password1,group1;user2,1001,password2,group1,group2"
      # create groups with group name "group1" with gid 2000 and "group2" with gid 2001
      - "GROUPS=group1,2000;group2,2001"
      # launch smbd with extra parameters => -d 2 means log level = 2
      - "SMBD_ARGS=-d 2"
    restart: unless-stopped
    volumes:
      # this is the location of the config file
      - ./smb.conf:/samba/smb.conf
      # these are situational, depending on your smb.conf
      - ./private:/samba/private
      - ./public:/samba/public
      # you might need to tag the above files properly if you are running SELinux