Adolfo Delorenzo
e372df578b
Complete Phase 1 implementation of KubeSolo OS — an immutable, bootable Linux distribution built on Tiny Core Linux for running KubeSolo single-node Kubernetes. Build system: - Makefile with fetch, rootfs, initramfs, iso, disk-image targets - Dockerfile.builder for reproducible builds - Scripts to download Tiny Core, extract rootfs, inject KubeSolo, pack initramfs, and create bootable ISO/disk images Init system (10 POSIX sh stages): - Early mount (proc/sys/dev/cgroup2), cmdline parsing, persistent mount with bind-mounts, kernel module loading, sysctl, DHCP networking, hostname, clock sync, containerd prep, KubeSolo exec Shared libraries: - functions.sh (device wait, IP lookup, config helpers) - network.sh (static IP, config persistence, interface detection) - health.sh (containerd, API server, node readiness checks) - Emergency shell for boot failure debugging Testing: - QEMU boot test with serial log marker detection - K8s readiness test with kubectl verification - Persistence test (reboot + verify state survives) - Workload deployment test (nginx pod) - Local storage test (PVC + local-path provisioner) - Network policy test - Reusable run-vm.sh launcher Developer tools: - dev-vm.sh (interactive QEMU with port forwarding) - rebuild-initramfs.sh (fast iteration) - inject-ssh.sh (dropbear SSH for debugging) - extract-kernel-config.sh + kernel-audit.sh Documentation: - Full design document with architecture research - Boot flow documentation covering all 10 init stages - Cloud-init examples (DHCP, static IP, Portainer Edge, air-gapped) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
84 lines
2.4 KiB
Bash
Executable File
84 lines
2.4 KiB
Bash
Executable File
#!/bin/bash
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# extract-core.sh — Extract Tiny Core Linux rootfs from ISO
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set -euo pipefail
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SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
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CACHE_DIR="${CACHE_DIR:-$PROJECT_ROOT/build/cache}"
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ROOTFS_DIR="${ROOTFS_DIR:-$PROJECT_ROOT/build/rootfs-work}"
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# shellcheck source=../config/versions.env
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. "$SCRIPT_DIR/../config/versions.env"
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TC_ISO="$CACHE_DIR/$TINYCORE_ISO"
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ISO_MNT="$ROOTFS_DIR/iso-mount"
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if [ ! -f "$TC_ISO" ]; then
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echo "ERROR: Tiny Core ISO not found: $TC_ISO"
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echo "Run 'make fetch' first."
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exit 1
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fi
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# Clean previous rootfs
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rm -rf "$ROOTFS_DIR"
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mkdir -p "$ROOTFS_DIR" "$ISO_MNT"
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# --- Mount ISO and extract kernel + initramfs ---
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echo "==> Mounting ISO: $TC_ISO"
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mount -o loop,ro "$TC_ISO" "$ISO_MNT" 2>/dev/null || {
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# Fallback for non-root: use 7z or bsdtar
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echo " mount failed (need root?), trying bsdtar..."
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mkdir -p "$ISO_MNT"
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bsdtar xf "$TC_ISO" -C "$ISO_MNT" 2>/dev/null || {
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echo " bsdtar failed, trying 7z..."
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7z x -o"$ISO_MNT" "$TC_ISO" >/dev/null 2>&1
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}
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}
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# Find vmlinuz and core.gz (path varies by Tiny Core version/arch)
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VMLINUZ=""
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COREGZ=""
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for f in "$ISO_MNT"/boot/vmlinuz64 "$ISO_MNT"/boot/vmlinuz; do
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[ -f "$f" ] && VMLINUZ="$f" && break
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done
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for f in "$ISO_MNT"/boot/corepure64.gz "$ISO_MNT"/boot/core.gz; do
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[ -f "$f" ] && COREGZ="$f" && break
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done
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if [ -z "$VMLINUZ" ] || [ -z "$COREGZ" ]; then
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echo "ERROR: Could not find vmlinuz/core.gz in ISO"
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echo "ISO contents:"
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find "$ISO_MNT" -type f
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umount "$ISO_MNT" 2>/dev/null || true
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exit 1
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fi
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echo "==> Found kernel: $VMLINUZ"
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echo "==> Found initramfs: $COREGZ"
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# Copy kernel
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cp "$VMLINUZ" "$ROOTFS_DIR/vmlinuz"
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# --- Extract initramfs (core.gz → rootfs) ---
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echo "==> Extracting initramfs..."
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mkdir -p "$ROOTFS_DIR/rootfs"
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cd "$ROOTFS_DIR/rootfs"
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zcat "$COREGZ" | cpio -idm 2>/dev/null
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# Unmount ISO
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cd "$PROJECT_ROOT"
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umount "$ISO_MNT" 2>/dev/null || true
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rm -rf "$ISO_MNT"
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echo "==> Rootfs extracted: $ROOTFS_DIR/rootfs"
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echo " Size: $(du -sh "$ROOTFS_DIR/rootfs" | cut -f1)"
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echo " Kernel: $ROOTFS_DIR/vmlinuz ($(du -h "$ROOTFS_DIR/vmlinuz" | cut -f1))"
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# --- Audit kernel config if available ---
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if [ -f "$ROOTFS_DIR/rootfs/proc/config.gz" ]; then
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echo "==> Kernel config found in rootfs, auditing..."
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"$SCRIPT_DIR/../config/kernel-audit.sh" <(zcat "$ROOTFS_DIR/rootfs/proc/config.gz") || true
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fi
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echo "==> Extract complete."
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