Posts tagged "devops"
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Use docker context to make your life easier
Running several Compose projects on one machine means port conflicts and containers you can't safely kill. Moving each project into its own VM and reaching it through a docker context fixes both - without ever typing ssh.
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VM Snapshots in qcontroller: Go Back to When Everything Worked
qcontroller can now snapshot a running VM and restore it later - RAM, devices, disk, everything. Here's why I wanted it, and the one change to disk attachment that made the implementation almost trivial.
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-hda vs virtio-blk: Match the Disk Bus to the Guest Image
qcontroller booted Ubuntu cloud images without problems, then broke on 26.04. The reason: the image switched to initrdless boot, and my -hda (SATA) disk no longer had a driver. Here's how I tracked it down.
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Bootstrapping Kubernetes Before the Registry Exists - Pre-Tagging Images for containerd
Bootstrap a Kubernetes cluster before the private registry exists. Pre-tag side-loaded container images with the future registry path so Helm values, containerd cache, and kubelet pulls all reference the same string.
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Network Namespaces: Isolating VM Networking
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Running QEMU VMs on ARM64: UEFI Requirements
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Local DNS Resolution for Docker Containers in Development
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Introducing qcontroller: Declarative VM Management with QEMU and Go
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QEMU QAPI Client for Go — Native Code-Gen Straight from QEMU
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Automating Bridge + TAP Networking with a Go Binary (No Bash, No Fuss)
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How to customize PostgreSQL Docker Initialization the Right Way
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Setting Up VM Networking on Linux: Bridges, TAPs, and More
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Setting Up a Simple Two-Node Kubernetes Cluster in No Time
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QEMU networking on macOS
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Automating the Building of VMs with Packer
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Simplify networking with socat