The Docker container ecosystem is growing very fast and networking has taken an interesting direction with different networking models being introduced and it becomes even more interesting when container orchestration engines like Swarm, Mesos, Kubernetes have to implement networking for Docker containers. At this Meetup, we will talk about the networking capabilities for Docker, networking models like CNM (Container Network Model), how they fit into container orchestration frameworks, what's ready for production and what's in the design/discussion phase expected to be available in near future.

1. Docker Networking in Swarm, Mesos, Kubernetes
April 2016
Fawad Khaliq - @fawadkhaliq

2. Copyright © PLUMgrid, Inc. 2011-2016
Introduction
Speaker
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Sr. Software Engineer at PLUMgrid
Khaliq
Fawad
Twitter: @fawadkhaliq
IRC: fawadkhaliq

3. Copyright © PLUMgrid, Inc. 2011-2016
• Introduction
• Docker Orchestration Tools
• Docker Swarm
• Mesos
• Kubernetes
• Docker Networking
• Early (host, bridge, container modes)
• Modern (libnetwork)
• PLUMgrid’s involvement in the Docker ecosystem
• Demo
Agenda
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4. Orchestration Tools
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• Scheduling
• Scaling
• Management
• Upgrades
• Availability
• Service Discovery
• Networking
Docker Orchestration Tools
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Docker Swarm
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Mesos
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Kubernetes
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9. Networking
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• Early
• Bridge mode
• Host mode
• Container mode
• Evolution
• Container Network Model (CNM)
Docker Networking Strategies
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Docker’s interface between the docker daemon and the network
Container Network Model (CNM)
• Docker specific (Docker Swarm)
• Network = Subnet
• ‘Metadata’ to select group policies at the
network level
• Options: arbitrary key/value data
libnetwork
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docker network
create Create a network
connect Connect container to a network
disconnect Disconnect container from a network
inspect Display network information
ls List all networks
rm Remove a network
Docker Network CLI
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Container Network Interface
Treats container / group (pod) of containers synonymous to Linux network namespaces
Networks described on JSON based format for network and IPAM config in /etc/cni/net.d
{
"name": “test-net",
"type": ”bridge”,#type of network plugin:bridge,macvlan,ipvlan,commercial
"bridge": "cni0",
"isGateway": true,
"ipMasq": true,
"ipam": {
"type": “host-local", # can be pluggable IPAM
"subnet": "10.22.0.0/16",
"routes": [{ "dst": "0.0.0.0/0" }]
}}
Capable to providing networking for Docker containers as well
Other networking options
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Networking and Orchestration Tools Together
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* In discussion phase
** In design/implementation phase

15. PLUMgrid’s Involvement in the Docker Ecosystem
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16. Copyright © PLUMgrid, Inc. 2011-2016
• PLUMgrid and Docker Swarm
• PLUMgrid libnetwork plugin
• Available at https://github.com/plumgrid/libnetwork-plugin
• Uses PLUMgrid Open Networking Suite
• PLUMgrid and Mesos
• Mesos Networking under Docker containerizer
• Mesos Networking Isolators
PLUMgrid in Docker Ecosystem
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17. Copyright © PLUMgrid, Inc. 2011-2016
Docker Swarm and PLUMgrid
Libnetwork (CNM)
PLUMgrid Plugin
Slave Node
Container
Container
Container
Container
Docker
Daemon
Master Node
Swarm Manager
Consul / etcd / …
Docker Daemon (in each slave)
Daemon
IOVisor
PLUMgrid Director Cluster
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Docker Swarm and PLUMgrid
VD: t1
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19. DEMO
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Demo: Docker Swarm
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Overview
Network Creation w/ Docker Swarm (libnetwork)
Containers on-boarded on PLUMgrid VDs
Security Policies
Use Case
Micro-segmentation & Networking for
Containers and microservices
What to expect
Changing Policies alters the traffic flow
between containers
Environment

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