How does named container know each other's the ip address in docker user created bridged network? - 


docker network create --driver bridge network1 docker run -itd --name docker1 --network network1 busybox docker run -itd --name docker2 --network network1 busybox docker exec -it docker1 /bin/bash

now in docker1, can ping docker2

/ # ping docker2 ping docker2 (172.19.0.3): 56 data bytes 64 bytes 172.19.0.3: seq=0 ttl=64 time=0.056 ms

i thought entry added in /etc/hosts, not

/ # cat /etc/hosts 127.0.0.1       localhost ::1     localhost ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix 172.19.0.2      841c0dc99115

how docker1 know docker2's ip address?

docker resolves names through internal dns server used docker daemon can check dns adress cat /etc/resolv.conf understand more can read here


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