In this episode, I answer some student questions around Kubernetes setup, DNS round robin, some new docker plugins, and what GitOps is.
In this episode, I give a brief rundown of Kubernetes architecture, and how the raft consensus algorithm plays a major role in server communication within your cluster.
In this episode, we're celebrating the annual Sysadmin Day by covering system administration topics with containers. We'll go over healthchecks, exit codes, containers on windows, and more.
In this episode, I talk with Chris Hickman about using containers since the early days of docker, using AWS ECS as your orchestrator, and more...
In this episode I talk with the authors of the book Docker In Action, 2nd Edition. We have a great chat on real-world craziness in running software and challenges with containers. It was a lot of fun, and I've put their book discount code in the show notes.
In this episode, I talk with Docker Captain Antonis Kalipetis about various developent in docker topics.
In this episode, I discuss learning Linux with John Kennedy, who helps organize the Northern Virginia Linux Users Group, and how we might learn Linux by running things inside Docker containers.
In this episode I talk with Betty Junod of Solo.io about Containers, Kubernetes, and Service Mesh.
In this episode, I answer a question about controlling container startup order in a multi-container app.
In this episode, I chat with Ray Vittum, our DevOps intern, about his experience while moving from a traditional sysadmin role to a DevOps one.
In this episode I answer a question about if it's possible to migrate or containerize, a VM into a container.
In this episode I answer a question about how to start a Swarm service container in privileged mode.
In this episode I answer a question about how to use external volume storage with docker and swarm.
In this episode I answer a question about how to troubleshoot docker swarm networking and docker dns.
In this episode I discuss the differences between the dockerfiles commands of ENTRYPOINT and CMD, and how to use them together for automate container startup tasks.
In this episode, I answer a question about how to control admin access to docker and swarm using roll based authentication.
In this episode, I talk with Kubernetes, Docker, and Swarm instructor Jérôme Petazzoni about how to learn and use Kubernetes, and we answer a bunch of YouTube Live questions along the way.
In this episode I'm live from the show floor at DockerCon with Nirmal Mehta and Nils De Moor as we cover the announcments, our favorite sessions, and take your questions on everything from Kubernetes, K3s, Proxy's, Traefik, Docker Enterprise 3.0, Linkerd, storage replication, and more.
In this episode, I have guests Nirmal Mehta, a Chief Technologist at Booz Allen Hamilton, and Michael Irwin, an Application Architect at Virginia Tech University. We talk about running tech meetups, how to be a community leader, the Docker and ARM announcement (the processor in Raspberry Pi), Docker for Node.js, AWS ARM A1 instances, QEMU, Traefik Proxies, Docker Swarm, Network Time (NTP, SNTP), Let's Encrypt, and more.
In this episode, I am joined by Phil Estes of IBM, Scott Coulton of Microsoft, and Sujay Pillai. We're all working in the DevOps space and discuss topics and open source projects weeks before DockerCon. Topics include Kubernetes, CNCF, ContainerD, CNAB, Rootless Docker, Linux security in containers, and more.
In this episode, I chat with Laura Tacho from CloudBees and Marcos Lilljedahl from iúnigo, both Docker Captains and developers. We take questions from the live audience and discuss topics ranging from the difference between Jenkins and Jenkins X, to Facebook's osquery and other new open source, to Docker's upcoming 19.03 release and its new features.
I answer a question about how to build multiple Docker images from a single GitHub repository. I talk about how to change which Dockerfile Docker build will use, and how to control the path (or context) that Docker builds from.
I answer a question about using TLS/SSL certificates in local development with Docker for microservices and then how to use those certs in production Docker. I talk about Let's Encrypt, Traefik, and more.
Docker Captain Michael Irwin and I discuss Java .war files in containers, and how you should break them up. We answer a question on how to design them for easy isolation and replacement.
Docker Captain Michael Irwin and I discuss backups of databases in a container cluster like Docker Swarm.
Docker Captain Michael Irwin and I go over various storage options for persistent volumes in Swarm, and how you need to think about storage for Docker.
In March of 2019 I talked with Michael about the new "docker-app" experimental tool. This clip talks about why it exists, and how to use it. In April 2019 Docker released a beta of 19.03 that includes "docker-app" as a plugin to the standard docker CLI, as "docker app", but most other features of this tool stay the same. We also talk about the standard behind this tool, CNAB.
In this episode, I list the steps to copy or sync files between a docker volume and the host
In this episode I quickly list the steps to setup a Docker Swarm in AWS using docker-machine and shell scripts
I go through the multiple ways to get your environment variables into a container, and what shouldn't go into your ENV's.
In this episode, I give a quick answer to the discussion on a single production server. Should you use docker-compose or Docker Swarm?
In this episode, I give a quick answer on how you might design MongoDB and other database servers for auto-clustering inside Docker.
In this episode, I answer a question on when you should run multiple apps in a container, and how you can use supervisor to do that.
In this episode, I answer the question: should you migrate your postgres servers into containers.
In this episode, I talk about the recent Docker runc vulnerability and what you need to do about it.
In this episode I answer a question about how to control docker and other containers like a nginx proxy from inside a seperate container.
In Docker 18.09.1 and Docker Desktop 188.8.131.52 (stable) in January 2019, we now have a new option for running Windows Containers on Windows 10 in "process isolation mode" which removes the need to launch a full Windows Server Hyper-V VM. It's a great new way for running lightweight Windows Containers, but has its own limits and config requirements.
A viewer asks how they can prototype their software in Docker with a Raspberry Pi. I explain the various parts of the workflow including ARM 64 vs. x64 CPU architectures, the benefits of QEMU emulation in Docker Desktop, and how to get Docker images from your local machine to the Pi.
A viewer asks why their Elasticsearch server on their local development setup with Docker Compose would give them a yellow health status. I talk about the common causes for this in my own experience with shard replication.
A viewer asks about how their local docker container IP's, if behind NAT, can have issues with outside subnets at their company. I explain some of the ways even NAT won't solve IP routing for containers and how you can change your settings to different private subnets.
Someone asks about image pruning while a Swarm service is in the middle of deployment, and how they've experienced failed containers. I reply with the details of what's going on in specific steps of a Service creation and deployment, and how the prune command could interfere.
I answer questions about updating your app secrets and configs in Docker Swarm without downtime
I answer questions about designing Apache web servers for multiple Websites in containers
I answer a question about using sudo in containers and file permissions when using non-root users.
Alpine Linux container images are often regarded as the "best for production, security, and image size", but I debate this based on several trends and current limitations.