When you think about Kubernetes, you probably think AWS or GCP, a nice managed service where you can easily spin up resources and build applications on top of them. Azure Kubernetes Service (AKS) offers serverless Kubernetes, an integrated continuous integration and continuous delivery (CI/CD) experience, and enterprise-grade security and governance. You might be tempted to get a bunch of Rasberri Pi’s, but there are better alternatives.Before we dive into them, consider the following: Here is my K8S cluster, it fits on a single shelf in the closet: All the kit is plugged into a gigabit Ethernet switch. Also, running on Pi’s can be a pain unless everything you want to run has an ARM container, or you build your own. The key record will only be populated once the challenge completes — validate that it works. ), storage provider for K8S persistent volumes, authentication provider for kubernetes users. It is basically a helm chart values file. I have chosen Ubuntu Server 20.04 LTS, just because of familiarity and it’s ubiquity — there is even a version for Raspberri PI. I have used Kubernetes to host multiple applications on Google Cloud platform with great success and found the platform easy to use after the initial ramp up period with one big caveat, cost. While they might not crop up in most business-critical production environments this year, these technologies are exemplary projects to run in a home lab. On MicroK8S you install MetalLB by enabling the corresponding addon. Helm: This is a command-line interface that enables you to define, deploy, & upgrade Kubernetes applications using charts. Storage works the other way — we will install a distributed storage system on our cluster, they (typically) keep 3 copies of data for redundancy. Optionally set a hostname. All it … You can find more information about how I have setup Kubernetes at my Gitlab repo, which has helpful code snippets, full configuration files, as well as expanded documentation. At the end you'll be able to start learning how to interact with Kubernetes via its CLI kubectl. Ingress software is not part of the Kubernetes software project, instead Ingress Controllers are third party software that is installed in a cluster and configured by Kubernetes — like anything else, they run in a pod/container, and needs a service to be reachable form the outside world. Next, let’s assume you have a DNS registrar, got yourself the domain timmy.com. Validate that kubectl works form your dev machine and you can get pods, etc. If you need NFS-style shared storage, you will have to standup a separate service in a container, on top of it. The scheduler does respect Local PS and won’d move the pod — it’s a reasonable option if you are deploying a distributed database, or similar system which is designed to handle redundancy, replication, and clustering. We are going to be using Kubespray for our cluster, as it makes creating and updating a Kubernetes cluster very simple and straightforward. System administrators and IT services might be spending majority of their time here. Next level down are Services for administration and running the applications — that’s your own MySQL database, ELK Stack, Monitoring, etc. That is why we are going to look at setting up Kubernetes ourselves. K3S is much stranger — all components of K8S have been packed into a single binary, and run as a single service/deamon. Also, check the kube config file and make sure the IP is correct. I stole the ~/.kube/config off the master for my workstation and it worked! Behind your router, your LAN IPs will be split into three ranges: I have changed subnet /netmask of my router to 255.255.240.0. They have to be formatted and mounted — you add them as a filepath. In the Nodes tab, edit every node and add all the disks. You can only install Rancher on. The plebian option is to directly expose a disk or directory from our server to the container — that’s HostPath and Local Persistent Storage. Ever since I had my first house and ran a server on top of the fridge, I’ve always found some sort of excuse to operate a home lab, much like a lot of people. sudo snap install microk8s --classic --channel=1.18/stable, kubectl apply -f https://raw.githubusercontent.com/metallb/metallb/v0.9.3/manifests/namespace.yaml, git clone https://github.com/longhorn/longhorn && cd longorn, otherwise K3S will revert all changes and deploy Traefik the way it was, ou can create an endpoint and a corresponding service, https://github.com/jetstack/cert-manager/releases/download/v0.14.3/cert-manager.crds.yaml, https://acme-v02.api.letsencrypt.org/directory, Run a Minecraft server for free on Kubernetes, Create ReadWriteMany PersistentVolumeClaims on your Kubernetes Cluster, Manage iptables firewall for Docker/Kubernetes, Using SSL certificates from Let’s Encrypt in your Kubernetes Ingress via cert-manager, Deploying Traefik as Ingress Controller for Your Kubernetes Cluster, software components of K8S (kubelet, API-server, etc. Yeah, overkill. Kubernetes overview: Above: Kubernetes Components by Julia Evans It groups containers that make up an application into logical units for easy management and discovery. By following along with Chris' eBook, I've recently added Kubernetes and a few nodes to my network, which give me the ability to add any number of services. Distributed storage systems are designed to solve this problem, they pool together the storage space of all servers, and will provision a persistant volume for any pod that requests it. If you decide to do this later, you can simply make the change and then re-run the deployment with the command in step 4 above. Home Automation with Raspberry Pi(s) can now benefit from some of the tools used by large-scale deployments. To add other machines as agents in the cluster, retrieve the token from /var/lib/rancher/k3s/server/node-token on the master node. DEV Community – A constructive and inclusive social network for software developers. Single node. It is aimed at a home network, and does not rely on loadbalancers, SAN’s, multiple public IPs or any other fancy infrastructure. Kubernetes (K8s) is an open-source system for automating deployment, scaling, and management of containerized applications. This is a guide to run K8S in a home network, and use it as a home server — run your blog, media library, smart home, pet projects, etc. We're a place where coders share, stay up-to-date and grow their careers. On K3S you must install MetalLB through kubectl: Then you must create a configmap in the metallb-system namespace to specify the IP range it can use: Verify that MetalLB works by deploying a blank nginx application with service of type LoadBalancer. ; Tiller: This is a server component that runs in a Kubernetes cluster and accepts commands from helm.It handles the deployment and configuration of software applications on the cluster. Available for free at home-assistant.io Start for Free! Kubernetes (pronounced “koo-ber-net-ees”) is open-source software for deploying and managing those containers at scale—and it’s also the Greek word for helmsmen of a ship or pilot. Set the following vlaues, in addition to defaults: Save the resulting file as traefik-customised.yaml and delete the original — otherwise K3S will revert all changes and deploy Traefik the way it was. The folding@home project recently added support for the Corona virus (2019-nCoV). There are many. Only HTTP traffic can be routed based on domain name, so if we want to expose a MySQL database, we must port-forward that particular service. My home networks weren't always very complicated, but they ran a few services that I enjoyed having available, so it suited me. Hey there! Do you know that you can easily install a kubernetes cluster in your home lab without the need to provisioning cloud resources? Traffic on TCP:80 and 443 must be directed to the ingress service using it’s IP — from there it will be routed to the correct application depending on the domain name, and we can host virtually unlimited number of websites that way. Interesting approach! Your machine/VM should have at least 1 core and 3Gb of RAM. Kubernetes, also known as K8s, is an open-source system for automating deployment, scaling, and management of containerized applications. You can spend more time improving your cluster and deploying prometheus, grafana, and other services, or you could jump straight in and host your blog, or whatever else you have on your mind. Deploying Kubernetes has gotten easier than ever. You can test that your cluster is up and running with the following commands: kubectl cluster-info which should return something like: Kubernetes master is running at https://10.0.40.245:6444. kubectl get nodes which displays the state of all of your nodes. It comes with a great dashboard, edit the it’s service to Loadbalancer and open it in a browser — you will be presented with a summary of your cluster: Now your cluster has all the essentials — you are basically your own cloud provider. You can easily add more nodes by following the instructions kubeadm gives you when it runs. Docs Pricing. Getting Started with Kubernetes (at home) — Part 1, Getting Started with Kubernetes (at home) — Part 2, Getting Started with Kubernetes (at home) — Part 3, Getting Started with Kubernetes (at home) (3 Part Series), Configuring Istio with OIDC authentication, Install CentOS 7 from the USB ISO image, a basic install is fine, Create a user for Ansible access. Or you can always go with Intel-NUC if space is at a premium. Finally, edit K3S configuration in /etc/systemd/system/k3s.service and add —-no-deploy traefik, Verify that your ingress works correctly by creating an ingress for docker hello-world application, making it available at hello..com. You can then get them to join the cluster by running: Avoid using domain name for connecting agents to the master node — it will work but any issues with DNS will result in your cluster falling apart. From Minecraft, to Torrents, to your new startup, we build tools for hosting anything, anywhere! Edit existing ingress service in accordance with the above, and you are done. Enable net.bridge.bridge-nf-call-iptables. The open source project is hosted by the Cloud Native Computing Foundation. Beelink Gemini X45 with J4105 8GB RAM, 128GB SSD and 320 GB HDD, this is the master node. Once you’ve configured longhorn, I would advice reverting the servicetype back to ‘ClusterIP’, and configure ingress as an authenticating proxy, at least with basic authentication. In fact, in a recent survey, 42% of Kubernetes users list Planet Scale Designed on the same principles that allows Google to run billions of containers a week, Kubernetes can scale without increasing your ops team. 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