(系統：Centos 7.4 ，docker 版本：18.03.1-ce， docker-compose version 1.18.0)
cat docker-compose.yml
version: '3'
services:
test1:
image: busybox:latest # 鏡像為 busybox
entrypoint: # 容器啟動后執行 top 命令，使容器沒法立即退出
- top
networks:
backend: # 使用指定的網絡 backend, 並且設置網絡別名為 test1，
aliases: # 設置網絡別名后，可以在其他容器中 ping test1 訪問到該容器
- test1
test2:
image: busybox:latest
entrypoint:
- top
networks:
backend:
aliases:
- test2
networks:
backend:
啟動
docker-compose up -d
docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
4d05ceb2088d busybox:latest "top" 5 seconds ago Up 4 seconds ibaboss_test2_1
f4ccafa24664 busybox:latest "top" 5 seconds ago Up 4 seconds ibaboss_test1_1
docker exec -it 4d05ceb2088d /bin/sh
/ # ping test1
PING test1 (172.19.0.2): 56 data bytes
64 bytes from 172.19.0.2: seq=0 ttl=64 time=0.061 ms
64 bytes from 172.19.0.2: seq=1 ttl=64 time=0.062 ms
ping ibaboss_test1_1
PING ibaboss_test1_1 (172.19.0.2): 56 data bytes
64 bytes from 172.19.0.2: seq=0 ttl=64 time=0.045 ms
64 bytes from 172.19.0.2: seq=1 ttl=64 time=0.056 ms
64 bytes from 172.19.0.2: seq=2 ttl=64 time=0.061 ms
# 在網絡中可以通過 容器名字或者網絡的別名 進行通信