DevOps and Docker Talk

DevOps and Docker Talk
Clips and interviews from my weekly YouTube Live show.

Can You Learn Linux inside Docker?
Aug 19 • 69 min
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.
What is Service Mesh and When You Might Need It, with Betty Junod of
Aug 12 • 62 min
In this episode I talk with Betty Junod of about Containers, Kubernetes, and Service Mesh.
Startup Order With Multi-Container Apps
Aug 5 • 4 min
In this episode, I answer a question about controlling container startup order in a multi-container app.
Learning DevOps With Ray The Intern
Jul 29 • 51 min
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.
Can I Turn a VM into a Container?
Jul 22 • 6 min
In this episode I answer a question about if it’s possible to migrate or containerize, a VM into a container.
How to Run Privileged Containers in Swarm
Jul 15 • 9 min
In this episode I answer a question about how to start a Swarm service container in privileged mode.
How to Use External Storage in Docker
Jul 8 • 4 min
In this episode I answer a question about how to use external volume storage with docker and swarm.
Troubleshooting Docker Swarm Networking and DNS
Jul 1 • 10 min
In this episode I answer a question about how to troubleshoot docker swarm networking and docker dns.
ENTRYPOINT vs. CMD, what’s the difference in Dockerfiles
Jun 24 • 11 min
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.
Docker and Swarm RBAC Options
Jun 11 • 2 min
In this episode, I answer a question about how to control admin access to docker and swarm using roll based authentication.
Learning Kubernetes with Jérôme Petazzoni
Jun 1 • 63 min
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.
Live from DockerCon with the Docker Captains
May 25 • 53 min
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,…
Pre DockerCon with Nirmal Mehta and Michael Irwin
May 17 • 74 min
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…
Pre DockerCon with Phil Estes, Scott Coulton, and Sujay Pillai
Apr 30 • 65 min
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,…
Pre DockerCon with Laura Tacho and Marcos Lilljedahl
Apr 21 • 70 min
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…
Multiple Docker Images From One Git Repo
Apr 15 • 3 min
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.
TLS in Dev and Prod with Docker
Apr 10 • 4 min
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.
Java and JBoss in Containers. One .war File Per Container?
Mar 28 • 6 min
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.
Backing Up a Database Container in Swarm
Mar 22 • 6 min
Docker Captain Michael Irwin and I discuss backups of databases in a container cluster like Docker Swarm.
Swarm Volume Storage Drivers
Mar 18 • 7 min
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.
Learning The New Docker App with Michael Irwin
Mar 13 • 27 min
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,…
Docker Bind-mount and Volume File Changes During Entrypoint
Mar 10 • 2 min
In this episode, I list the steps to copy or sync files between a docker volume and the host
Docker Swarm Install in AWS
Mar 8 • 5 min
In this episode I quickly list the steps to setup a Docker Swarm in AWS using docker-machine and shell scripts
Docker Environment Configs, Variables, and Entrypoints
Mar 6 • 22 min
I go through the multiple ways to get your environment variables into a container, and what shouldn’t go into your ENV’s.
Use Docker Compose or Swarm For A Single Server?
Feb 22 • 2 min
In this episode, I give a quick answer to the discussion on a single production server. Should you use docker-compose or Docker Swarm?
Auto Setup of Mongo Replicas in Docker
Feb 22 • 3 min
In this episode, I give a quick answer on how you might design MongoDB and other database servers for auto-clustering inside Docker.
Using Supervisor To Run Multiple Apps In A Container
Feb 21 • 5 min
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.
Should You Move Postgres to Containers
Feb 20 • 7 min
In this episode, I answer the question: should you migrate your postgres servers into containers.
Docker “runC” Security Vulnerability: CVE-2018-5736
Feb 19 • 7 min
In this episode, I talk about the recent Docker runc vulnerability and what you need to do about it.
Updating A Proxy From A Different Container
Feb 18 • 7 min
In this episode I answer a question about how to control docker and other containers like a nginx proxy from inside a seperate container.
Windows 10 Containers Get Process Isolation
Feb 7 • 7 min
In Docker 18.09.1 and Docker Desktop (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…
Getting Started With Raspberry Pi Development in Docker
Feb 7 • 4 min
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…
Elasticsearch Local Development Shows Yellow Health Status
Feb 7 • 4 min
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.
Docker Network IP Subnet Conflicts with Outside Networks
Feb 7 • 5 min
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…
Docker Swarm Service Fails Deployment When Image Prunes
Feb 7 • 6 min
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…
Updating Swarm Configs and Secrets Without Downtime
Jan 31 • 6 min
I answer questions about updating your app secrets and configs in Docker Swarm without downtime
Apache In Containers And Multiple Virtual Host Websites
Jan 31 • 4 min
I answer questions about designing Apache web servers for multiple Websites in containers
Container Non-root Users, SUDO, GOSU, and File Permissions
Jan 31 • 8 min
I answer a question about using sudo in containers and file permissions when using non-root users.
Alpine Linux As A Base Image, Is It Really Secure?
Jan 31 • 20 min
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.