diff options
Diffstat (limited to 'archive/kvm-lab-create.bak')
| -rwxr-xr-x | archive/kvm-lab-create.bak | 132 |
1 files changed, 91 insertions, 41 deletions
diff --git a/archive/kvm-lab-create.bak b/archive/kvm-lab-create.bak index d0d5865..43d2926 100755 --- a/archive/kvm-lab-create.bak +++ b/archive/kvm-lab-create.bak @@ -1,51 +1,106 @@ #!/usr/bin/env bash set -euo pipefail -# Libvirt context (system) URI="qemu:///system" -# Base/template (immutable parent qcow2) -BASE="/var/lib/libvirt/images/base/debian13-template.qcow2" -TEMPLATE_DOMAIN="debian13-template" +IMGROOT="/var/lib/libvirt/images" +BASEDIR="$IMGROOT/base" +LABDIR="$IMGROOT/lab" -# Lab overlays directory (dedicated) -LABDIR="/var/lib/libvirt/images/lab" +TEMPLATE_DOMAIN="debian13-template" +TEMPLATE_BASE="$BASEDIR/debian13-template.qcow2" usage() { - echo "Usage: kvm-lab-create <lab-name> [--start]" - echo "Example: kvm-lab-create lab02 --start" + echo "Usage: kvm-lab-create <lab-name> [--base template|work01|/abs/path.qcow2] [--start]" + echo "Examples:" + echo " kvm-lab-create lab10 --base template --start" + echo " kvm-lab-create lab11 --base work01 --start" + echo " kvm-lab-create lab12 --base /var/lib/libvirt/images/base/custom.qcow2 --start" } +# --- Parse args --- NAME="${1:-}" -START="${2:-}" +shift || true -if [[ -z "$NAME" ]]; then - usage - exit 1 -fi +BASESEL="template" +START="no" + +while [[ $# -gt 0 ]]; do + case "$1" in + --base) + BASESEL="${2:-}" + shift 2 + ;; + --start) + START="yes" + shift + ;; + -h|--help) + usage + exit 0 + ;; + *) + echo "ERROR: Unknown argument: $1" + usage + exit 1 + ;; + esac +done -if [[ "${START:-}" != "" && "${START:-}" != "--start" ]]; then +if [[ -z "$NAME" ]]; then usage exit 1 fi DISK="${LABDIR}/${NAME}.qcow2" XML_TMP="$(mktemp "/tmp/${NAME}.xml.XXXXXX")" - cleanup() { rm -f "$XML_TMP"; } trap cleanup EXIT -# ---- Preconditions (read-only checks) ---- -if ! sudo test -r "$BASE"; then - echo "ERROR: Base image not readable: $BASE" - exit 1 -fi +# --- Resolve base selection --- +resolve_base() { + local sel="$1" + if [[ "$sel" == "template" ]]; then + echo "$TEMPLATE_BASE" + return 0 + fi + + if [[ "$sel" == "work01" ]]; then + # Pick newest promoted work01 base (must exist first) + local latest + latest="$(ls -1t "$BASEDIR"/work01-base-*.qcow2 2>/dev/null | head -n 1 || true)" + if [[ -z "$latest" ]]; then + echo "ERROR: No work01 base found in $BASEDIR (expected work01-base-*.qcow2)." + echo "Action: run your promote script to create one." + return 1 + fi + echo "$latest" + return 0 + fi + # Absolute path base + if [[ "$sel" == /* ]]; then + echo "$sel" + return 0 + fi + + echo "ERROR: Invalid --base '$sel' (use template|work01|/abs/path.qcow2)" + return 1 +} + +BASE="$(resolve_base "$BASESEL")" + +# --- Preconditions (read-only checks) --- if [[ ! -d "$LABDIR" ]]; then echo "ERROR: Lab directory missing: $LABDIR" exit 1 fi +if ! sudo test -r "$BASE"; then + echo "ERROR: Base image not readable (via sudo): $BASE" + exit 1 +fi + if [[ -e "$DISK" ]]; then echo "ERROR: Disk already exists: $DISK" exit 1 @@ -61,50 +116,45 @@ if ! virsh -c "$URI" dominfo "$TEMPLATE_DOMAIN" &>/dev/null; then exit 1 fi -# ---- Create overlay disk ---- +# --- Create overlay disk --- +echo "Using base: $BASE" echo "Creating overlay disk: $DISK" sudo qemu-img create -f qcow2 -F qcow2 -b "$BASE" "$DISK" >/dev/null - -# Ensure qemu/libvirt can open it sudo chown libvirt-qemu:libvirt "$DISK" sudo chmod 0660 "$DISK" -# Quick sanity: confirm backing file is correct echo "Validating backing file..." -sudo qemu-img info "$DISK" | grep -E "backing file:|file format:|virtual size:" || true +sudo qemu-img info "$DISK" | grep -E "file format:|virtual size:|backing file:" || true -# ---- Clone domain XML ---- +# --- Clone domain XML --- echo "Cloning domain XML from: $TEMPLATE_DOMAIN" virsh -c "$URI" dumpxml "$TEMPLATE_DOMAIN" > "$XML_TMP" -# Replace <name> and the disk path, and force NAT-only network "default" -# Notes: -# - disk path substitution assumes template points at /var/lib/libvirt/images/base/debian13-template.qcow2 -# - network replacement assumes a standard <interface type='network'> exists +# Set name, disk path, and force NAT-only network "default" sed -i \ -e "s|<name>${TEMPLATE_DOMAIN}</name>|<name>${NAME}</name>|" \ - -e "s|${BASE}|${DISK}|g" \ + -e "s|${TEMPLATE_BASE}|${DISK}|g" \ -e "s|<source network='[^']*'|<source network='default'|g" \ "$XML_TMP" -# Extra safety: remove any hostfs passthrough (if any) to prevent host access via mounts -# (If none exist, this does nothing.) -perl -0777 -i -pe 's/<filesystem[\s\S]*?<\/filesystem>\n?//g' "$XML_TMP" -# # Remove UUID to avoid collision with template sed -i -E '/<uuid>[^<]*<\/uuid>/d' "$XML_TMP" -# ---- Define domain ---- + +# Remove any host filesystem passthrough (if present) +perl -0777 -i -pe 's/<filesystem[\s\S]*?<\/filesystem>\n?//g' "$XML_TMP" + +# --- Define domain --- echo "Defining domain: $NAME" virsh -c "$URI" define "$XML_TMP" >/dev/null -# ---- Optional start ---- -if [[ "$START" == "--start" ]]; then +# --- Optional start --- +if [[ "$START" == "yes" ]]; then echo "Starting domain: $NAME" virsh -c "$URI" start "$NAME" >/dev/null fi -echo "OK: Lab '${NAME}' created (disk: ${DISK})." -if [[ "$START" != "--start" ]]; then - echo "To start: virsh -c $URI start ${NAME}" +echo "OK: Lab '$NAME' created (disk: $DISK)." +if [[ "$START" != "yes" ]]; then + echo "To start: virsh -c $URI start $NAME" fi |