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Docker Online Meetup #41: Deep Dive into Docker 1.12 Networking

For this week’s #Docker Online Meetup, Sr. Director, Networking at Docker, Madhu Venugopal, joined us to talk about Docker 1.12 Networking and answer questions.
Starting with Docker 1.12, Docker has added features to the core Docker Engine to make multi-host and multi-container orchestration simple to use and accessible to everyone. Docker 1.12 Networking plays a key role in enabling these orchestration features.
In this online meetup, we learned all the new and exciting networking features introduced in Docker 1.12:

Swarm-mode networking
Routing Mesh
Ingress and Internal Load-Balancing
Service Discovery
Encrypted Network Control-Plane and Data-Plane
Multi-host networking without external KV-Store
MACVLAN Driver

 
The number of questions Madhu got at the end of the online meetup was amazing and because he did not have time to answer all of them, we’ve added the rest of the Q&A below:
Q: Will you address the DNS configuration in Docker? We have two apps created with docker compose and would like to enable communication and DNS resolution from containers in one of the apps to containers in the other app.
Check out the PTAL external network feature in docker compose in the Docker docs to get started. If that does not satisfy your requirement, please raise an issue in docker/docker.
Q: What mechanism is used to register the different docker instances with each other so that they recognize a shared network between hosts, please?
Docker swarm-mode uses Raft and GRPC to communicate between docker instances. That’s how the nodes in the cluster exchange data and recognize shared network. At the data-plane, overlay driver uses VXLAN tunnels to provide per-network multi-host connectivity and isolation.
Q: Does it work with NSX?
This question is related to network plugins and the community has developed OVS & OVN plugins.  We are not sure if NSX integration is feasible through that.  Typically vendor plugin are created and maintained by the vendor directly.
Q: Is there a way to see all records registered in Docker internal DNS?  Is it exposed via API so it can be queried?
The Internal DNS is not exposed but network inspect and service inspect APIs can be used to gather this information.
Q: Has swarm mode created dependency of docker-engine on iptables?
Docker Engines has been using iptables since 1.0 for the bridge driver. Swarm mode merely makes use of iptables to provide functionality like the routing mesh.
Q: Can I have only 2 nodes in swarm and both are managers and node themselves as well?
Docker recommends an odd number of manager nodes as the Raft consensus requires majority consensus and to take full advantage of the fault tolerance features of swarm mode.  Please read through https://docs.docker.com/engine/swarm/raft/ for more information.
Q: Wil making ports into a cluster wide resources limit the number of total services whereas using public VIPs is expandable?
Yes.  Docker does not control public VIP so it needs to be managed external to the docker cluster. However, only front-end services require port-publishing & only those services that requires port-publishing will be participating in the Routing Mesh. Back-end services do not reserve cluster-wide ports.
Q: Can I plumb more than one IP per container while only using one network?
At the moment, libnetwork supports one routable IP per endpoint (per network). But users can configure many more link-local ip-addresses to the same endpoint. If you are interested in discussing this capability further, please open an enhancement request in docker/docker.
Q: Can you insert records into DNS to cause static IPs to be used?
Docker doesn’t expose embedded DNS APIs externally. Users can provide external DNS using the –dns option and one can insert custom name-lookup entries in the external DNS server which will be used by the containers.
Q: Can you talk more about automatic key rotation for secure networks? How often does it occur and is the interval configurable? What process(es) are responsible for key rotation?  How are the keys circulated throughout the cluster?
Please read the Overlay Security Model on the Docker Docs. Currently this is not configurable, but we are working on the configurability of this and other swarm mode features. Key-rotation is entirely handled by manager node process (swarmkit) and is distributed in the secured grpc channel established between the manager and workers.
Q: Regarding front end ports, is there a limitation on the number of port 80&8217;s you can listen on?
Yes. The best way to mitigate that is to run a global nginx or haproxy or other reverse-proxy service and back the backend services by the host-header.
Have a question that wasn’t answered or a specific requirement? Check out the Docker Forums or open an issue on GitHub.

Watch @MadhuVenugopal to learn about the new networking features introduced in docker 1.12Click To Tweet

Want to learn more about Docker 1.12 and networking? Check out these resources:

Docker 1.12 Networking Model Overview by Docker Captain Ajeet Singh Raina
Docker Docs: Understand Docker container network
Docker 1.12 Release Notes
Docker Blog: Docker 1.12: Now With Built-In Orchestration!
Scale a real microservice with Docker 1.12 Swarm Mode by Docker Captain Alex Ellis
Docker 1.12 orchestration built-in by Docker Captain Gianluca Arbezzano

The post Docker Online Meetup #41: Deep Dive into Docker 1.12 Networking appeared first on Docker Blog.
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Your Docker Agenda for LinuxCon North America

Hey Dockers! We’re excited to be back at #LinuxCon this year in Toronto and hope you are, too! We’ve a got a round-up of many of our awesome #Docker speakers, as well as a booth. Come visit us in between the sessions at booth #41 inside “The Hub”. You may even be able to score yourself some Docker swag.
 

Monday:
11:45am – Curious about the Cloud Native Computing Foundation, Open Container Initiative, Cloud Foundry Foundation and their role in the cloud ecosystem? Docker’s Stephen Walli joins other panelists to deliver So CFF, CNCF, and OCI Walk into a Room (or ‘Demystifying the Confusion: CFF, CNCF, OCI).
3:00pm &8211; Docker Captain Phil Estes will describe and demonstrate the use of the new schema format’s capabilities for multiple platform-specific image references in his More than x86_64: Docker Images for Multi-Platform session.
4:20 pm &8211; Join Docker’s Mike Coleman for Containers, Physical, and virtual, Oh My! insight on what points businesses need to consider as they decide how and where to run their Docker containers.
 
Tuesday:
2:00pm &8211; Docker Captain Phil Estes is back with Runc: The Little (Container) Engine that Could where he will 1) give an overview of runc, 2) explain how to take existing Docker Containers and migrate them to runc bundles and 3) demonstrate how modern container isolation features can be exploited via runc container configuration.
2:00pm &8211; Docker’s Amir Chaudhry will explain Unikernels: When you Should and When you Shouldn’t to help you weigh the pros and cons of using unikernels and help you decide when when it may be appropriate to consider a library OS for your next project.
 
Wednesday:
10:55am &8211; Mike Goelzer and Victor Vieux rom Docker’s Core team will walk the audience through the new orchestration features added to Docker this summer: secure clustering, declarative service specification, load balancing, service discovery and more in their session From 1 to N Docker Hosts: Getting Started with Docker Clustering.
11:55am &8211; Kendrick Coleman, Docker Captain will talk about Highly Available & Distributed Containers. Learn how to deploy stateless and stateful services all completely load balanced in a Docker 1.12 swarm cluster
2:15pm &8211; Docker’s Paul Novarese will dive into User namespace and Seccomp support in Docker Engine, covering new features that respectively allow users to run Containers as without elevated privileges and provide a method of containment for containers.
4:35pm &8211; Docker’s Riyaz Faizullabhoy will deliver When The Going Gets Tough, Get TUF Going!
The Update Framework (TUF) helps developers secure new or existing software update systems. Join Docker’s Riyaz Faizullabhoy’s When The Going Gets Tough, Get TUF Going! to learn the attacks that TUF protects against and how it actually does so in a usable manner.
 
Thursday:
9:00am &8211; In this all day tutorial, Jerome Petazzoni will teach attendees how to Orchestrate Containers in Production at Scale with Docker Swarm.
In addition to our Docker talks, we have two amazing Docker Toronto meetups lined up just for you. Check them out:
On August 23rd, we’re joining together with Toronto NATS Cloud Native and IoT Group at Lighthouse Labs to feature Diogo Monteiro on “Implementing Microservices with NATS” and our own Riyaz Faizullabhoy on “Docker Security and the Update Framework (TUF)”.
Come August 24th we’ll be at the Mozilla Community Space. Gou Rao, CTO and co-founder of Portworx will be touching on “Radically Simple Storage for Docker”, while Drew Erny from Docker will discuss “High Availability using Docker Swarm”.

Going to linuxcon next week? here is the list of docker sessions we recommend cc…Click To Tweet

The post Your Docker Agenda for LinuxCon North America appeared first on Docker Blog.
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Your Docker Agenda in August

From webinars to workshops, #meetups to conference talks, check out our list of events that are coming up in August!

North America | South America | Europe | Oceania | Asia | Africa | Official Docker Training Courses
 

Check out the @Docker agenda for August! Tons of awesome meetups, webinars & conferences!Click To Tweet

Official Docker Training Courses
View the full schedule of instructor led training courses here! Description of courses are below.

Docker Datacenter Training Series
Introduction to Docker
Docker Administration and Operations
Advanced Docker Operations
Managing Container Services with Universal Control Plane
Deploying Docker Datacenter
User Management and Troubleshooting UCP

North America
 
Aug 3rd: Docker Meetup at Docker HQ – San Francisco, CA
Come and join us at Docker HQ on Wednesday for our 47th meetup! Ben Bonnefoy , a member of the Docker technical staff, will give an insight into Docker for Mac and Docker for Windows and then Nishant Totla , a software engineer in the core open source team, will give some updates on Docker #1.12. This will be followed by a talk by Neil Gehani , a Sr. Product Manager at HPE, on in-cluster testing. It will be a fun evening of learning, exchanging ideas and networking with pizza, beer and plenty of Docker stickers for everyone.
RSVP
Aug 3rd: Docker Meetup at Meltmedia &8211; Tempe, AZ
This meetup will focus on Docker for AWS, specifically running distributed apps from localhost to AWS.
RSVP
Aug 4th: Docker Meetup at Rackspace &8211; Austin, TX
A discussion about Docker Tips and Tricks.
RSVP
Aug 9th: Docker Meetup at CA Technologies &8211; Denver, CO
A talk about moving from SaaS to On-Premise with Docker, in particular how Docker made it possible to deploy a SaaS web application into firewalled networks and a journey of orchestrating together micro-service architecture from raw bash script to Replicated.
RSVP
Aug 11th: Docker Meetup at Full Sail Campus &8211; Orlando, FL
Docker Ecosystem and Use Case talks, followed by networking.
RSVP
Aug 11th: Docker Meetup at Braintree &8211; Chicago, IL
Ken Sipe will take the group through a look at the anatomy of a container including control groups (cgroups) and namespaces. Then there will be a discussion about Java’s memory management and GC characteristics and how JRE characteristics change based on core count.
RSVP
Aug 16th: Docker Meetup at AEEC Innovation Lab &8211; Alexandria, VA
Docker Captain, Phil Estes, will present.
RSVP
Aug 16th: Docker Meetup at Datastax &8211; Santa Clara, CA
Databases, Image Management, In-cluster and Chaos Testing talks by Baruch Sadogursky, Ben Bromhead and Neil Gehani.
RSVP
Aug 16th: Docker Meetup at Impact Hub &8211; Santa Barbara, CA
This meetup will be about leveraging Docker + Compose for a real world dev environment. James Brown from Invoca will discuss how the move to Docker has benefited their development process.
RSVP
Aug 18th: Docker Meetup at CirrusMio &8211; Lexington, KY
Come and learn how others are using Docker! There will be two demos/talks scheduled for this meetup. The first will be about using Jenkins to build containers and the second will be about Docker in production.
RSVP
Aug 18th: Docker Meetup in Minneapolis &8211; Minneapolis, MN
The Container Summit City Series comes to Minneapolis on August 18th to continue the conversation surrounding containers in production! Bryan Cantrell, CTO of Joyent, will be joined in speaking by other expert users from companies that have been running containers in production for years and have experience with what solution stacks work best and what pitfalls to avoid.
RSVP
Aug 22nd: Docker Meetup at Issuetrak &8211; Virginia Beach , VA
Bret Fisher will tell all about DockerCon 2016 and what&8217;s in store for Docker in 1.12.
Aug 22nd &8211; 24th: LinuxCon/ ContainerCon &8211; Toronto, CA
There’s plenty of us at LinuxCon/ ContainerCon this year! Come see us at Booth #41 to meet the Docker speakers and pick up your swag.
Aug 23rd: Docker and NATS Cloud Native Meetup During LinuxCon &8211; Toronto, Canada
The Docker Toronto meetup group and the Toronto NATS Cloud Native and IoT meetup group are joining forces to bring you a mega-meetup during LinuxCon! Riyaz Faizullabhoy from Docker will present on ‘The Update Framework&8217; and , Diogo Monteiro will discuss implementing microservices with NATS. Raffi Der Haroutiounian will give an overview of NATS, Docker and Microservices.
Aug 23rd: Docker Meetup at the Iron Yard &8211; Houston, TX
Join us for our next meetup event!
RSVP
Aug 24th: Docker Meetup at CodeGuard &8211; Atlanta, GA
Talk by Eldon Stegall entitled, &8216;Abusing The Bridge: Booting a baremetal cluster from a docker container.&8217;
RSVP
Aug 28th &8211; 31h: VMworld 16 US &8211; Las Vegas, CA
Docker returns to VMworld this year and in Las Vegas! We’re launching our newest and biggest booth yet, so be sure to catch us at Booth #2362. Yes, there will be swag given away.
Aug 31st: Docker Meetup in Salt Lake City &8211; Salt Lake City , UT
Come for a tutorial on new Docker 1.12 features and a review of DockerCon 2016 by Ryan Walls.
RSVP

South America
 
Aug 4th: Docker Meetup at Globant &8211; Córdoba, Argentina
Come for a talk on Docker for AWS. Talks by Florencia Caro, Ruben Dopazo, Carlos Santiago Moreno y Luis Barrueco.
RSVP
Aug 6th: Docker Meetup at Universidad Interamericana de Panamá &8211; Panamá, Panama
An introduction to Docker and Docker Cluster.
RSVP
Aug 9th: Docker Meetup at VivaReal&8211; Sao Paulo, Brazil
RSVP
Aug 13th: Docker Meetup at Microsoft Peru &8211; Lima, Peru
Join for a DockerCon recap.
RSVP
Aug 20th: Docker Meetup at Auditório-Unijorge Campus Comércio &8211; Salvador, Brazil
This is the beginning of the Docker Tour: the Docker Salvador meetup group&8217;s initiate to spread Docker technology among IT students in Salvador. This event will have two lectures for beginners where they can install the tool and learn Docker at ease in a friendly environment.
RSVP
Aug 23rd: Docker Meetup at Auditório Tecnopuc &8211; Porto Alegre, Brazil
A meetup to discuss PHP and Docker.
RSVP

Europe
 
Aug 3rd: Docker HandsOn &8211; Meet-Repeat C##n+1 &8211; Hamburg, Germany
Aug 4th: Docker Meetup at SkyScanner Glasgow &8211; Glasgow, United Kingdom
What&8217;s new in Docker Land (@rawkode and @GJTempleton). Guy & I will be walking you through all the latest developments in Docker Land, including Docker Engine 1.12, Docker Compose 1.8, and Docker for Mac and Windows. Also well as these Docker updates, we&8217;ll be providing a quick review of DockerCon 2016 and highlighting some of the best talks for you to watch in your own time.
RSVP
Aug 8th: Docker Talk at Golang Conference &8211; Golang, UK
Speaking Docker Captain Tiffany Jernigan
Aug 9th: IOT RpiCar si ASP.NET Core + Docker &8211; Bucharest, Romania
Aug 10th:  Docker Meetup at KWORKS &8211; Istanbul, Turkey
Dockerizing a Complex Application Stack [w/Istanbul DevOps]
Aug 24th: Docker Meetup at Pipedrive &8211; Tallinn, Estonia
Let&8217;s share and discuss our experience with Docker ecosystem. More details of the content coming up!
RSVP
Aug 24th: Docker Meetup at Elastx &8211; Stockholm, Sweden
Continuously Deploying Containers To Docker Swarm Cluster. Speaker: Viktor Farcic (Docker Captain), & Senior Consultant, CloudBees. Abstract: Many of us have already experimented with Docker &8211; for example, running one of the pre-built images from Docker Hub. It is possible that your team might have recognized the benefits that Docker, in conjunction with experimentation, provides in building microservices and the advantages the technology could bring to development, testing, integration, and, ultimately, production.
RSVP
Aug 25th: Day of Containers &8211; Stockholm &8211; Stockholm, Sweden
Andrey Devyatkin & Viktor Farcic (Docker Captain) will give a talk “Docker 101.” If you are new to docker, this session is for you! In this sessions you will learn all the basics of docker and its main components. We will go through the the concept of containers, writing your own docker files, connecting data volumes, and basic orchestration with compose and swarm. Bring your laptops!
Aug 28th: Docker Meetup at Praqma &8211; Copenhagen, Denmark
Continuously Deploying Containers To Docker Swarm Cluster. Speaker: Viktor Farcic, Docker Captain & Senior Consultant, CloudBees. Abstract: Many of us have already experimented with Docker &8211; for example, running one of the pre-built images from Docker Hub. It is possible that your team might have recognized the benefits that Docker, in conjunction with experimentation, provides in building microservices and the advantages the technology could bring to development, testing, integration, and, ultimately, production.
RSVP
Aug 28th: Docker Talk at Agile Peterborough &8211; Peterborough, UK
Speaker Docker Captain Alex Ellis
Aug 28th: Docker Pre- Conference Meetup &8211; Praqma, Copenhagen
Speaker Docker Captain Viktor Farcic
Aug 29th: Docker Meetup at Praqma &8211; Copenhagen, Denmark
Laura Frank (Docker Captain) &8211; &8220;Stop being lazy and test your software.&8221; Testing software is necessary, no matter the size or status of your company. Introducing Docker to your development workflow can help you write and run your testing frameworks more efficiently, so that you can always deliver your best product to your customers and there are no excuses for not writing tests anymore. Jan Krag &8211; &8220;Docker 101.&8221; If you are new to docker, this session is for you! In this sessions you will learn all the basics of docker and its main components.
Viktor Farcic (Docker Captain)

Aug 31st: Docker Meetup at INCUBA &8211; Aarhus, Denmark
Rohde & Schwarz will give a talk about how they use Docker for development and test. HLTV.org will give a talk about how they use Docker to easily deploy microservices as part of their web platform.
RSVP
Aug 31st &8211; Sep 2: Software Circus &8211; Amsterdam, Netherlands
In Amsterdam for Software Circus? So is Docker! Speaking from Docker Ben Firshman

Asia
 
Aug 20th: Docker Meetup at Red Hat India Pvt. Ltd &8211; Bangalore, India
Docker for AWS and Azure &8211; Neependra Khare (Docker Captain), CloudYuga. Service Discovery and Load Balancing with Docker Swarm &8211; Ajeeth S. Raina (Docker Captain), Dell. Docker Application Bundle Overview &8211; Thomas Chacko. Logging as a service using Docker &8211; Manoj Goyal, Cisco. SDN-Like App Delivery Controller using Docker Swarm &8211; Prasad Rao, Avi Networks.
RSVP

Oceania 
Aug 1st: Docker Meetup in Auckland &8211; Auckland, New Zealand
Learn about all the new Docker features and offerings announced at DockerCon16 in Seattle!
RSVP
Aug 8th: Docker Meetup at Commbank &8211; Sydney, Australia
The Big Debate: AWS v Azure vs Google Cloud vs EMC Hybrid Cloud. One of the questions will help bring to light each platform&8217;s integration with the Docker ecosystem.
RSVP

Africa
Aug 6th: Docker Meetup at LakeHub &8211; Kisumu, Kenya
Please join us to learn about all the exciting announcements from DockerCon! Talk 1: What&8217;s New in Docker 1.12, by William Ondenge. In this presentation, William will describe Docker 1.12 new features and help you get your hands on the latest builds of Docker to try them on your own.
RSVP
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