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Docker-OVS
- 1. Docker Networking IntroMeetup Sriram Natarajan Dhananjay Sampath
- 2. Agenda Introduction toContainer Networking Docker + OpenvSwitch demo Hands on Tutorial instructions
- 3. Docker Networking 101 eth0 docker0 172.17.42.1 Container1 Container2 eth0 eth0 vethAQI2T veth01qe
- 4. Docker Bridge options --net=bridge --net=host --net=container:NAME_or_ID --net=none
- 5.
- 6. Port Mapping eth0 docker0 172.17.42.1:49514 Container1 Container2 eth0:5000 eth0 vethAQI2T veth01qe -P flag
- 7. Internet Communication eth0 docker0 172.17.42.1 internet Container1 Container2 eth0 eth0 vethAQI2T veth01qe ip_forward = 1
- 8. Inter Container Communication Container2 eth0 vethAQI2T veth01qe docker0 Container1 --icc=true
- 9. Linking of Containers ● Name the container using --name option ● Link container using --link name:alias db eth0 vethAQI2T veth01qe docker0 web
- 10. Hands on setupinstructions Containet Source Code: https://bitbucket.org/snrism/containet Instructions: README part of the source code.
- 11. Connecting docker containersin 2 hosts Container 1 Container 2 172.17.0.4 172.17.0.5 docker0 Container 3 Container 4 172.17.0.4 172.17.0.5 docker0 172.17.42.1 172.17.42.1 Host 1 Host 2 eth1 eth1 10.0.0.3 10.0.0.4 IP Address Conflicts…
- 12. Configuring container IPaddresses Container 1 Container 2 172.18.42.10 172.18.42.11 docker0 Container 3 Container 4 172.18.42.12 172.18.42.13 docker0 172.18.42.1 172.18.42.2 Host 1 Host 2 eth1 eth1 10.0.0.3 10.0.0.4 Start a container w/o using docker's default network config: docker run -d --net=none -t -i ubuntu /bin/bash Record the Container ID that just started: docker ps Configure IP addresses on eth0: ./start-container.sh <container-id> <ip-addr>
- 13. Experiment 1 Connecthosts via OVS (docker bridge + OVS) Container 1 Container 2 172.18.42.10 172.18.42.11 docker0 Container 3 Container 4 172.18.42.12 172.18.42.13 docker0 br0 (ovs) gre0 br0 g r e 0 (ovs) 172.18.42.1 172.18.42.2 Host 1 Host 2 eth1 eth1 10.0.0.3 10.0.0.4 Setup GRE Tunnel: ./ovs-tunnel-setup.sh Setup IPTables for containers to reach other hosts: ./iptables.sh Start a container w/o using docker's default network config: docker run -d --net=none -t -i ubuntu /bin/bash Record the Container ID that just started: docker ps Configure IP addresses on eth0: ./start-container.sh <container-id> <ip-addr>
- 14. Experiment 2 Connecthosts via OVS (direct OVS) Container 1 Container 2 Container 3 Container 4 br0 (ovs) gre0 br0 g r e 0 (ovs) Host 1 Host 2 eth1 eth1 10.0.0.3 10.0.0.4 Start a container w/o using docker's default network config: docker run -d --net=none -t -i ubuntu /bin/bash Record the Container ID that just started: docker ps Configure eth1 and attach to OVS: ./connect-container.sh <container-id> <ip-addr>
- 15. Experiment 3 Connecthosts via OVS (direct OVS) Use VLAN tags to segregate containers Container 1 Container 2 Container 3 Container 4 br0 (ovs) gre0 br0 g r e 0 (ovs) Host 1 Host 2 eth1 eth1 Start a container w/o usi1n0g.0 d.0o.3cker's default network config: docker run -d1 0--.n0.e0t.4=none -t -i ubuntu /bin/bash Record the Container ID that just started: docker ps Configure eth1 and attach to OVS: ./connect-container.sh <container-id> <ip-addr> <vlan-tag>
- 16. Advanced Tools OpenSource Tools Description Pipework https://github.com/jpetazzo/pipework Better configuration capabilities. Works well with LXC and docker Weave https://github.com/zettio/weave Simplifies connecting containers across multiple hosts. Lorispack https://github.com/lorispack/loris Heterogeneous options to connect containers across hosts Kubernetes https://github. com/GoogleCloudPlatform/kubernetes Container cluster manager Flannel https://github.com/coreos/flannel Overlay network that gives subnet for each machine with kubernetes Openstack Icehouse – Orchestrate docker containers via heat templates