Live Docker, Kubernetes, and Swarm Q&A

Starts at 3:45. I’m joined by Nirmal Mehta and we answered a TON of common questions:

Topics

00:00 Waiting
03:45 Intros
06:00 Windows 10 WSL2 support and 2004 patch
20:00 Mutagen file-sync now built Into Docker Desktop
22:30 Small base images vs. dependency optimization
32:00 Docker defaults vs. “more secure” settings
41:00 Swarm managers, 1 vs 3
46:25 Not all Linux distributions are equal
56:40 Docker versions, and other rapid-fire questions

#devops

What is GEEK

Buddha Community

Live Docker, Kubernetes, and Swarm Q&A
Christa  Stehr

Christa Stehr

1602964260

50+ Useful Kubernetes Tools for 2020 - Part 2

Introduction

Last year, we provided a list of Kubernetes tools that proved so popular we have decided to curate another list of some useful additions for working with the platform—among which are many tools that we personally use here at Caylent. Check out the original tools list here in case you missed it.

According to a recent survey done by Stackrox, the dominance Kubernetes enjoys in the market continues to be reinforced, with 86% of respondents using it for container orchestration.

(State of Kubernetes and Container Security, 2020)

And as you can see below, more and more companies are jumping into containerization for their apps. If you’re among them, here are some tools to aid you going forward as Kubernetes continues its rapid growth.

(State of Kubernetes and Container Security, 2020)

#blog #tools #amazon elastic kubernetes service #application security #aws kms #botkube #caylent #cli #container monitoring #container orchestration tools #container security #containers #continuous delivery #continuous deployment #continuous integration #contour #developers #development #developments #draft #eksctl #firewall #gcp #github #harbor #helm #helm charts #helm-2to3 #helm-aws-secret-plugin #helm-docs #helm-operator-get-started #helm-secrets #iam #json #k-rail #k3s #k3sup #k8s #keel.sh #keycloak #kiali #kiam #klum #knative #krew #ksniff #kube #kube-prod-runtime #kube-ps1 #kube-scan #kube-state-metrics #kube2iam #kubeapps #kubebuilder #kubeconfig #kubectl #kubectl-aws-secrets #kubefwd #kubernetes #kubernetes command line tool #kubernetes configuration #kubernetes deployment #kubernetes in development #kubernetes in production #kubernetes ingress #kubernetes interfaces #kubernetes monitoring #kubernetes networking #kubernetes observability #kubernetes plugins #kubernetes secrets #kubernetes security #kubernetes security best practices #kubernetes security vendors #kubernetes service discovery #kubernetic #kubesec #kubeterminal #kubeval #kudo #kuma #microsoft azure key vault #mozilla sops #octant #octarine #open source #palo alto kubernetes security #permission-manager #pgp #rafay #rakess #rancher #rook #secrets operations #serverless function #service mesh #shell-operator #snyk #snyk container #sonobuoy #strongdm #tcpdump #tenkai #testing #tigera #tilt #vert.x #wireshark #yaml

Panmure  Anho

Panmure Anho

1601301859

Kubernetes vs. Docker Swarm (k8 vs Docker Swarm)

Basically, both Kubernetes and Docker Swarm both are the container orchestration tool. The rise in interest to containers has in turn brought in higher demands for their deployment and management. Both Kubernetes and Docker Swarm are important tools that are used to deploy containers inside a cluster. So the question arises here is which one to use?

So lets discuss one by one and see the the differances between them.

Introduction to Kubernetes:

The name Kubernetes originates from Greek, meaning helmsman or pilot. Kubernetes is an open-source, portable, and extensible platform for managing containerized workload and services. That facilitates both declarative configuration and automation. Kubernetes manage the containers that run the applications and ensure that there is no downtime into a huge scale production environment.

Introduction to Docker swarm:

Docker swarm is a container orchestration tool, meaning that it allows the user to manage multiple containers deployed across multiple host machines. Docker Swarm is designed to work around four key principles:

  1. Less cluttered/heavy and with just working methodology
  2. No Single Point of Failure option for Docker Swarm
  3. Secure due to auto-generation of security certificates.
  4. Compatibility with Backward versions easily.

Here you get to know that both in some manner are the same , So now let’s check out the differences and see:

#devops #docker #docker swarm #kubernetes #swarm

Kubernetes vs Docker Swarm

·Installation and Cluster configuration

Kubernetes:

Setting up a cluster manually is complex. The configurations differ between different operating systems. It requires a lot of pre-planning as far as the setup goes. Components like storage and networks require configurations. Third-party packages like kubectl etc are required.

Docker Swarm:

Installing Docker Swarm clusters is simple. It only requires a few commands to setup a cluster, and then to add further worker or manager nodes. The setup is also OS independent, and so developers don’t have to spend any time learning new commands based on the OS.

· Load balancing

Kubernetes:

It has to be setup manually but is not very complicated. An ingress can be used to load balancing. Pods are exposed as a service.

Docker Swarm:

Load balancing is done by default and ports are assigned automatically. All containers from a cluster remain in a common network.

#docker #container-orchestration #containers #kubernetes #docker-swarm

Iliana  Welch

Iliana Welch

1595249460

Docker Explained: Docker Architecture | Docker Registries

Following the second video about Docker basics, in this video, I explain Docker architecture and explain the different building blocks of the docker engine; docker client, API, Docker Daemon. I also explain what a docker registry is and I finish the video with a demo explaining and illustrating how to use Docker hub

In this video lesson you will learn:

  • What is Docker Host
  • What is Docker Engine
  • Learn about Docker Architecture
  • Learn about Docker client and Docker Daemon
  • Docker Hub and Registries
  • Simple demo to understand using images from registries

#docker #docker hub #docker host #docker engine #docker architecture #api

Aketch  Rachel

Aketch Rachel

1624332660

Selenium Grid With Docker Swarm

In this guide, we will talk about setting up a Selenium Grid using Docker Swarm on any of the cloud services like GCP or AWS.

Let’s start with the basics first, i.e. what is Selenium Grid and Docker Swarm.

What is Selenium Grid?

Selenium Grid allows the execution of WebDriver scripts on remote machines (virtual or real) by routing commands sent by the client to remote browser instances. It aims to provide an easy way to run tests in parallel on multiple machines.

Selenium Grid allows us to run tests in parallel on multiple machines, and to manage different browser versions and browser configurations centrally (instead of in each individual test).

Selenium Grid purposes and main functionalities

  1. A central entry point for all tests
  2. Management and control of the nodes/environment where the browsers run
  3. Scaling
  4. Running tests in parallel
  5. Load balancing

Now a question comes “When to use Grid”?

Generally speaking, there are two reasons why you might want to use Grid.

  1. To run your tests against multiple browsers, multiple versions of browsers, and browsers running on different operating systems.
  2. To reduce the time it takes for the test suite to complete a test pass.

Grid is used to speed up the execution of a test pass by using multiple machines to run tests in parallel. For example, if you have a suite of 100 tests, but you set up Grid to support 4 different machines (VMs or separate physical machines) to run those tests, your test suite will complete in (roughly) one-fourth the time as it would if you ran your tests sequentially on a single machine.

What is Docker Swarm?

Docker swarm is a container orchestration tool, meaning that it allows the user to manage multiple containers deployed across multiple host machines.

One of the key benefits associated with the operation of a docker swarm is the high level of availability offered for applications. In a docker swarm, there are typically several worker nodes and at least one manager node that is responsible for handling the worker nodes’ resources efficiently and ensuring that the cluster operates efficiently.

What are the two types of Docker Swarm mode services?

Docker Swarm has two types of services: replicated and global.

**Replicated services: **Swarm mode replicated services functions by you specifying the number of replica tasks for the swarm manager to assign to available nodes.

**Global services: **Global services function by using the swam manager to schedule one task to each available node that meets the services constraints and resource requirements.

#docker-swarm #docker #selenium #docker swarm