Dockerffm meetup 20150113_networking
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This document summarizes several popular Docker networking solutions including Pipework, Weave, Flannel, Socketplane, and Wire. Pipework provides low-level container networking and integration with existing infrastructure. Weave and Flannel provide overlay networking across hosts. Socketplane uses Open vSwitch and supports integration with existing Open vSwitch networks. Wire is a tool that models and automates multi-host Docker environments using configuration files to validate, deploy, and test networks and applications.
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Dockerffm meetup 20150113_networking
- 2. Host Container ~$ apt-get install
- 3. Host Container eth0 ~$ ip addr show eth0
- 4. Host Container eth0 vethY vethX Network Namespaces Veth Pair „namespaced“ interfaces ethZ
- 5. Host Container eth0 docker0 Connecting to the host network Linux Bridge, created by dockerd 172.17.42.1/16 172.17.42.5/16 „IPAM“ by dockerd
- 6. Host Container eth0 docker0 Connecting to the outside world Address TranslaJon RouJng Masquerading # /sbin/iptables -L -n -t nat
- 7. Host Container eth0 docker0 Containers talk on docker0, secured by iptables Container
- 8. Host Container eth0 docker0 Across hosts via host ips + exposed port forwardings Container Host Container eth0 docker0 Container
- 9. Host Container eth0 Multiple tenants, i.e. with tagged interfaces Container Host Container eth0 Container eth4 eth4eth5 eth5 Take tagging down to container level?
- 10. Multiple Hosts/DCs Host Container Container Container Container DC DC Host Container Container Container Container Host Container Container Container Container Host Container Container Container Container
- 11. Pluggable network architecture & multi-host networking
- 12. How to ? • .. integrate containers into an existing system infrastructure, • .. connect to existing networks, • .. support vlans or vxlans etc.
- 13. pipework @jpetazzo github.com/jpetazzo/pipework à Not part of docker! 1
- 14. pipework 1 • creates new linux bridges & works on existing Open vSwitch bridges • injects a new interface into a container • connects interfaces to bridges • dhcp, vlan, ovs, ... supported • independent of docker
- 15. Weave weave.works github.com/zettio/weave • Overlay network • Router / Switch functionality, ships as container • Encryption • wraps docker 2 Demos Docs
- 16. Flannel github.com/coreos/flannel • Overlay network • UDP-based (optional VxLAN-style) • Uses etcd to store cluster/ip infos • Does not wrap dockerd, but docker0! 3
- 18. Socketplane 4 socketplane.io github.com/socketplane/socketplane • Open vSwitch-based Overlay • Discovery w/ Multicast DNS • Uses consul to store cluster info • wraps docker • ships as container + shell scripts hSps://www.youtube.com/watch?v=ukITRl58ntg hSps://www.youtube.com/watch?v=5uzUSk3NjD0
- 19. socketplane in a picture (*) Host Container eth0 docker0-ovs (*) according to demo Vagranaile setup on github eth1 docker0 vxlan VTEP port vlan-‐tagged port Host 4 eth0 eth1 docker0-ovs Privileged socketplane Container
- 20. Overview Pipework • Swiss army knife of container/namespace networking! • Low-level, but high degree of freedom when integrating existing network infrastructure (i.e vlans) Weave • cross-host overlay network magic, encrypted (!) • Stays parallel to existing network infrastructure Flannel • Good fit to CoreOS (O RLY?), etcd/systemd/.. • Integration with VxLAN networks Socketplane • Open vSwitch-based, integration with ovs-capable network infrastructure in the future • Working close to Feature Proposals
- 21. Test-driven infrastructure & Repeatibility Green Field vs. Brown-Field
- 22. Commands are ad-hoc # pipework br1 28096eac487b 192.168.77.10/24 # weave launch # weave run 10.0.1.1/24 -t -i ubuntu # socketplane network create web 10.2.0.0/16 # socketplane run -n web -itd ubuntu
- 23. ... in contrast to model-based approaches • Packer -> pckr.json • Vagrant -> Vagrantfile • Fig -> fig.yaml • ... ⇒ packer validate ⇒ vagrant destroy ⇒ fig up && fig ps
- 25. How it works Model files ~# wire
- 26. How it works Model files ~# wire validate Check consistency of model
- 27. How it works Model files ~# wire validate Check consistency of model up ovs à Bridges, dnsmasq à DHCP, fig à containers, then wiring, etc.
- 28. How it works Model files ~# wire validate Check consistency of model up ovs à Bridges, dnsmasq à DHCP, fig à containers, then wiring, etc. verify Check eveything using linux commands
- 29. How it works Model files ~# wire validate Check consistency of model up ovs à Bridges, dnsmasq à DHCP, fig à containers, then wiring, etc. verify Check eveything using linux commands spec Generate a #serverspec and run it
- 30. How it works Model files ~# wire validate Check consistency of model up ovs à Bridges, dnsmasq à DHCP, fig à containers, then wiring, etc. verify Check eveything using linux commands spec Generate a #serverspec and run it down Take it down in reverse order (detach, stop containers, remove dhcp, bridges)
- 31. Model Zones • Separate Components • i.e. „DMZ is untrusted“ • Policy in mind „DMZ à Application, Application à Backend, but not DMZ à Backend“ DMZ Applica8on Backend
- 32. Model Networks • Equals Open vSwitch bridge • Have names network ranges • Host may have an ip on that network • May be attached to host interfaces • May serve dhcp using dnsmasq DMZ Applica8on Backend dmz-ext 10.0.1.0/24 dmz-int 10.0.2.0/24 App-int 10.1.0.0/16 be-int 10.37.15.0/24 (dhcp 10.37.15.[20..29]) 10.1.1.15 10.37.15.1
- 33. Model Application Groups • That‘s where containers are in. • Containers are attached to networks of zone. • Currently managed using fig (1 fig file per app group) DMZ Applica8on Backend Web group App #1 App #2 DB NoSQL
- 34. Demo
- 35. Demo
- 36. Demo
- 37. Demo
- 38. Demo
- 39. Goals • System & Network Architecture specification. • Manage a working application environment, identically between dev, stage and prod. • Connect multiple docker hosts: using VLANs, VxLANs • Be pluggable, integrate what‘s coming
- 41. Thanks! @aschmidt75 github.com/de-wiring andreas@de-wiring.net dustin@de-wiring.net Pipework is (C) @jpetazzo, . Licensed under the Apache License, Version 2.0 Weave is (C) 2014 Zego Ltd. Licensed under the Apache License, Version 2.0 Socketplane is (C) 2014 SocketPlane, Inc. Licensed under the Apache License, Version 2.0 Flannel is (C) CoreOS, Licensed under the Apache License, Version 2.0 Wire: The MIT License (MIT) Copyright (c) 2014 Andreas Schmidt, DusJn Huptas