EXTENSIONS

Set up an Ubuntu host to run KVM/QEMU virtual machines with libvirt, the way the kvm-training deck does it, with the check/apply pattern @adam/cfgmgmt uses: host (the QEMU, libvirt and virtinst packages, and the user added to libvirt and kvm), pool (directory storage pools), network (nat, bridge, macvtap or routed), vm (Ubuntu Server guests from the release's cloud image, checked against SHA256SUMS and configured by cloud-init, with their address from qemu-guest-agent, and snapshots) and uplink, which says which of those can work on the host and why: Wi-Fi can't be bridged, a host that is itself a VM needs its hypervisor's help, and Docker can block bridged traffic. Every type runs on the host itself, as a swamp worker step, or over SSH with cfgmgmt's nodeHost arguments; workflows for both are included.

Render, validate and publish an Ubuntu Server autoinstall NoCloud seed from typed inputs, over SSH to an artifact-server root or for a CIDATA image. The password is a crypt hash from vault and no output carries a plaintext.

Install and operate Apt-Cacher NG on a Linux host over SSH and point apt clients at it: one managed server fragment plus per-distribution mirror backends, client proxy configuration with conflict detection and rollback, hit/miss and byte statistics, and removal. One model type serves any host: the SSH target and inputs arrive per call, and state is keyed by the target.

SSH-based configuration management for Linux and macOS.