Thales Maciel
3cf33d1e0a
Move the default guest package list into a repo manifest and record a hash beside built rootfs images so run/make-rootfs can warn when the docker-ready image is stale. Switch the Firecracker launch path to a single sparse root overlay per VM instead of separate /home and /var disks, so many VMs can share the same base image while still installing packages under /var and working from /root. Keep older images bootable by masking stale home.mount and var.mount units at boot, and scrub those obsolete fstab entries when customize.sh rebuilds an image. Verified with bash -n on the updated scripts; no live VM boot was run in this environment.
74 lines
1.6 KiB
Bash
Executable file
74 lines
1.6 KiB
Bash
Executable file
#!/usr/bin/env bash
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set -euo pipefail
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log() {
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printf '[make-rootfs] %s\n' "$*"
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}
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usage() {
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cat <<'EOF'
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Usage: ./make-rootfs.sh [--size <size>] [--base-rootfs <path>]
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Builds rootfs-docker.ext4 using customize.sh. If --base-rootfs is omitted,
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the first existing file is used:
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./rootfs.ext4
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./ubuntu-noble-rootfs/rootfs.ext4
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./ubuntu-lts/rootfs.ext4
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EOF
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}
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DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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source "$DIR/packages.sh"
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OUT_ROOTFS="$DIR/rootfs-docker.ext4"
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SIZE_SPEC="6G"
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BASE_ROOTFS=""
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while [[ $# -gt 0 ]]; do
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case "$1" in
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--size)
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SIZE_SPEC="${2:-}"
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shift 2
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;;
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--base-rootfs)
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BASE_ROOTFS="${2:-}"
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shift 2
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;;
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-h|--help)
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usage
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exit 0
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;;
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*)
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log "unknown option: $1"
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usage
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exit 1
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;;
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esac
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done
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if [[ -f "$OUT_ROOTFS" ]]; then
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OUT_ROOTFS_WARNING="$(banger_rootfs_manifest_warning "$OUT_ROOTFS" || true)"
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if [[ -n "$OUT_ROOTFS_WARNING" ]]; then
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log "warning: $OUT_ROOTFS_WARNING"
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fi
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log "already exists: $OUT_ROOTFS"
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exit 0
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fi
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if [[ -z "$BASE_ROOTFS" ]]; then
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if [[ -f "$DIR/rootfs.ext4" ]]; then
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BASE_ROOTFS="$DIR/rootfs.ext4"
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elif [[ -f "$DIR/ubuntu-noble-rootfs/rootfs.ext4" ]]; then
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BASE_ROOTFS="$DIR/ubuntu-noble-rootfs/rootfs.ext4"
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elif [[ -f "$DIR/ubuntu-lts/rootfs.ext4" ]]; then
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BASE_ROOTFS="$DIR/ubuntu-lts/rootfs.ext4"
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else
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log "no base rootfs found"
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exit 1
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fi
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fi
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log "building $OUT_ROOTFS from $BASE_ROOTFS"
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exec "$DIR/customize.sh" "$BASE_ROOTFS" \
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--out "$OUT_ROOTFS" \
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--size "$SIZE_SPEC" \
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--docker
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