Docker, Docker Swarm, Kubernetes and container orchestration on high-availability clusters. 33 articles from the MassiveGRID engineering teams.
Docker's own guidance on managers is precise: odd numbers, (N-1)/2 failures tolerated, three availability zones, drain the managers. This guide turns it into three swarm layouts with a monthly price for each.
Read MoreThe Kubernetes project publishes a small minimum for kubeadm: 2 GB RAM, 2 CPUs, swap off, ports open. This guide sizes a real cluster from it and prices three layouts with no control-plane fee.
Read MoreManaged Kubernetes charges for the control plane and for nodes sized to the busiest hour. A cluster billed per cloudlet-hour, with workers added on load triggers, changes both lines.
Read MoreNamespaces are not isolation when the change is to the ingress or the CRDs. Cloning a whole cluster per pull request, and stopping it when nobody is looking, turns out to be affordable.
Read MoreThe hospital's question was not whether the vendor used Kubernetes but where every byte went. A single-region cluster with isolated groups and firewall rules answered it in one diagram.
Read MoreKubernetes requests vs limits: why CPU throttles and memory kills, QoS classes and eviction order, why CPU limits often hurt, measuring real usage, LimitRange, quotas.
Read MoreArgo CD on a self-hosted cluster: pull vs push, the first Application, selfHeal and prune, repository layout, secrets options, AppProjects, and what GitOps does not fix.
Read MoreVelero for Kubernetes backup: what etcd snapshots cannot do, installing against S3, CSI vs file-system volume backup, hooks, schedules, and namespace-mapped restores.
Read MoreTalos Linux explained: no SSH or package manager, config as one API-applied file, patches over hand edits, system extensions, image-swap upgrades, and when to say no.
Read MoreMigrate Docker Compose to Kubernetes: what maps mechanically, replacing depends_on, ConfigMaps and Secrets, volumes and access modes, and restoring network isolation.
Read MoreDiagnose Kubernetes pods: Pending scheduling failures, CrashLoopBackOff exit codes, OOMKilled limits, ImagePullBackOff, empty endpoints and node pressure evictions.
Read MoreHelm explained: charts, values and releases, why helm template beats trial and error, where release state lives, the five common failures, and when Kustomize wins.
Read MoreThe Compose file that ran on one VPS runs on a three-node swarm with a deploy section added. Here is the move, service by service, and what the platform handles around the swarm.
Read MoreBoth packages install in a click and both scale. The engineer's question was which one a three-person team could run for five years, and the answer depended on two services, not twelve.
Read MoreTwo founders, 300 paying customers, no ops hire. The product runs on a Swarm whose workers appear when signups do, on managers spread across three hosts, for a bill that reads like a unit cost.
Read MoreKubernetes storage explained: PV, PVC and StorageClass, why access modes decide your architecture, StatefulSets, volume expansion and why snapshots are not backups.
Read MoreKubernetes ingress controllers compared: nginx, Traefik, HAProxy and Envoy Gateway, TLS patterns, the LoadBalancer problem off-cloud, and when to use Gateway API.
Read MoreNot everything needs an orchestrator. A developer runs the company's internal tools on one Docker Engine node with Compose and Portainer, and knows exactly when to graduate to a swarm.
Read MoreOpenShift vs Kubernetes: what Red Hat adds, the security default that breaks public images, a whole-cost comparison with real annual pricing, and how to decide.
Read MoreRun Kubernetes on Proxmox: VM template settings, control plane placement, how the two recovery layers interact, Ceph CSI storage, MetalLB and snapshot limits.
Read MoreBuild an HA Kubernetes control plane: quorum arithmetic, the API endpoint, containerd cgroups, kubeadm init and join, failover testing and certificate expiry.
Read MoreInstall k3s on a VPS: sizing, firewall ports, the bundled defaults worth changing, adding agents, HA with embedded etcd, and common failures.
Read MoreDocker Swarm vs Kubernetes for Small Teams: What Docker Swarm Does Well, What Kubernetes Adds, The Complexity Tax and When Swarm + Dokploy Is Enough.
Read MoreEvery Docker container you launch gets its own isolated network namespace — its own IP address, its own routing table, its own port space.
Read MoreDocker Volumes and Persistent Data on Ubuntu VPS: Why Containers Lose Data, Volumes vs Bind Mounts vs tmpfs and Creating and Managing Named Volumes.
Read MoreDocker transformed how we deploy applications, but managing containers entirely from the command line can feel like navigating a cockpit with no instruments.
Read MoreWhen you run multiple Docker applications on a single server, you need a reverse proxy to route incoming traffic to the right container.
Read MoreDocker Swarm on Ubuntu VPS: When Docker Swarm Makes Sense, Docker Swarm vs Kubernetes vs Nomad, Prerequisites and Initializing the Swarm.
Read MoreDocker Container Security on Ubuntu VPS: Understanding Docker's Attack Surface and Image Security: Scanning, Selecting, and Verifying.
Read MoreHow to Migrate Docker Applications Between Cloud Providers: Why Docker Migrations Are Easier (And Harder) Than You Think and Pre-Migration Preparation.
Read MoreHow to Install Docker and Docker Compose on an Ubuntu VPS: Prerequisites, Remove Old Docker Packages and Add Docker's Official APT Repository.
Read MoreHow to Run Docker on the Cloud with MassiveGRID: Running Docker in the cloud is a powerful way to deploy, manage, and scale applications with ease.
Read MoreWhat are the benefits of hosting a Kubernetes Cluster on MassiveGRID’s high availability clusters: Running a Kubernetes cluster on MassiveGRID’s high.
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