When i try and connect to a port from within my container to another container, i am unsuccessful and get,
root@ac1590a59fe5:/opt/f5massupgrade# curl -v https://172.17.0.1:6379
* Rebuilt URL to: https://172.17.0.1:6379/
* Hostname was NOT found in DNS cache
* Trying 172.17.0.1...
* connect to 172.17.0.1 port 6379 failed: No route to host
* Failed to connect to 172.17.0.1 port 6379: No route to host
* Closing connection 0
From the docker host I am successful,
[root@docker-host ~]# curl -v https://172.17.0.1:6379/0
* About to connect() to 172.17.0.1 port 6379 (#0)
* Trying 172.17.0.1...
* Connected to 172.17.0.1 (172.17.0.1) port 6379 (#0)
* Initializing NSS with certpath: sql:/etc/pki/nssdb
* CAfile: /etc/pki/tls/certs/ca-bundle.crt
CApath: none
If i check the iptables I can see the issue,
[root@docker-host ~]# iptables -S INPUT
-P INPUT ACCEPT
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -i docker0 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
So I add the following and it all works well,
iptables -I INPUT 4 -i docker0 -j ACCEPT
Am i missing something here?
[root@docker-host ~]# docker version
Client:
Version: 1.9.1
API version: 1.21
Package version: docker-common-1.9.1-40.el7.centos.x86_64
Go version: go1.4.2
Git commit: ab77bde/1.9.1
Built:
OS/Arch: linux/amd64
Server:
Version: 1.9.1
API version: 1.21
Package version: docker-common-1.9.1-40.el7.centos.x86_64
Go version: go1.4.2
Git commit: ab77bde/1.9.1
Built:
OS/Arch: linux/amd64
Thanks,