Fredric News

Tag: DevOps

  • Kubernetes kube-apiserver CA Certificates

    💡 Kubernetes kube-apiserver CA Certificates — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Kubernetes kube-apiserver CA Certificates. Related documents Setups 3rdParty Setups cluster cmd CNI cmd gitOps cmd SubDocs 3rd Party SubDocs Swagger Git OpenApi bash Copy https://raw.githubusercontent.com/kubernetes/kubernetes/master/api/openapi-spec/swagger.json SSL/PKI path kubectl describe pods -n kube-system kube-apiserver* ?: /etc/kubernetes/pki/* k8s-certs: /etc/kubernetes/ssl/*…

  • Kubernetes CoreDNS & systemd-resolved Config

    💡 Kubernetes CoreDNS & systemd-resolved Config — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Kubernetes CoreDNS & systemd-resolved Config. ReferenceGlossary DB: Siyoung’s Notion: troubleshooting: cmd: , References and Guidelines (NOTE) CoreDNS operation when using systemd-resolved on host HostNode: systemd-resolved is fixed as /etc/resolv.conf = 127.0.0.53loopback address. The actual resolve defined…

  • Infisical Secret Mgmt: Machine Identity & K8s

    💡 Infisical Secret Mgmt: Machine Identity & K8s — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Infisical Secret Mgmt: Machine Identity & K8s. API Reference

  • Kubernetes CoreDNS Nameserver T-Shoot

    💡 Kubernetes CoreDNS Nameserver T-Shoot — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Kubernetes CoreDNS Nameserver T-Shoot. TLDR@1qzxcThere is still version 1.27… . Tried a lot. The only thing that worked was to revert to the version you suggested. Here’s everything I tried for future reference. I installed kubernetes following…

  • Docker Image Tag, Push & Cleanup Automation

    💡 Docker Image Tag, Push & Cleanup Automation — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Docker Image Tag, Push & Cleanup Automation. V5 image tag & push bash Copy cat <<EOF >> tmp.sh repository=ghcr.io/myeong-han $(docker images | grep -Ev ‘REPOSITORY’ | awk ‘{ img = $1; sub(/.*\//, “”, img);…

  • Service Mesh Archi: Istio & Linkerd Data

    💡 Service Mesh Archi: Istio & Linkerd Data — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Service Mesh Archi: Istio & Linkerd Data. Service Mesh Overview Summary of reasons to use service mesh API gateway focuses on requests from the outside to services, while service mesh focuses on communication between…

  • Kubernetes Node Communication & Kubelet

    💡 Kubernetes Node Communication & Kubelet — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Kubernetes Node Communication & Kubelet. Infinite reboot issue of controlplanes such as etcd and kube-apiserver when using the latest version of containerd Action Change to use CRI-O Nameserver limit (3) exceeded when installing latest version k8s…

  • k3s Lightweight K8s Setup & Multi-Node

    💡 k3s Lightweight K8s Setup & Multi-Node — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for k3s Lightweight K8s Setup & Multi-Node. Server Default installation bash Copy curl -sfL https://get.k3s.io | sh – Use flag 1: Passed as an environment variable bash Copy curl -sfL https://get.k3s.io | INSTALL_K3S_EXEC=”$FLAGS” sh – 2:…

  • Jsonnet : Templating Large Kubernetes

    💡 Jsonnet : Templating Large Kubernetes — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Jsonnet : Templating Large Kubernetes. Installation jsonnet (c build or go build) jsonnet bundler — package manager bash Copy brew install jsonnet jsonnet-bundler Set up bash Copy # initiate the package manager jb init # >>…

  • Linux APT/YUM Private Mirror Repository Setup

    💡 Linux APT/YUM Private Mirror Repository Setup — Executive Summary Technical architectural analysis, practical configuration manifests, and deployment instructions for Linux APT/YUM Private Mirror Repository Setup. DEB/Ubuntu mariadb bash Copy curl -LsS https://r.mariadb.com/downloads/mariadb_repo_setup | sudo bash -s — –mariadb-server-version=”mariadb-10.4″ versions mariadb-10.4 mariadb-10.5 mariadb-10.6 mariadb-10.10 mariadb-10.11 mariadb-11.0 mariadb-11.1 mariadb-11.2 maxscale bash Copy curl -LsS https://r.mariadb.com/downloads/mariadb_repo_setup |…