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Cannot ping other containers on the same network


(Ysokolov) #1

I face a really weird case with Docker Compose 1.8 on RHEL 7 when containers can resolve their names but cannot access (ping) each other IP addresses.

YAML file looks like the one below:

version: ‘2’

services:
s1:
image: s1:latest
hostname: "s1"
s2:
image: s2:latest
hostname: “s2”

networks:
default:
ipam:
config:
- subnet: 10.29.0.0/16
ip_range: 10.29.5.0/24

s1 cannot ping s2 (IP address gets resolved but ping hangs).

Exactly same docker-compose configuration works in other environments.

I turned off the firewalld and iptables on the host machine but it doesn’t help. Any pointer is appreciated.