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>
81 lines
2.2 KiB
Bash
Executable File
81 lines
2.2 KiB
Bash
Executable File
#!/bin/sh
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# network.sh — Network configuration helpers for KubeSolo OS init
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# Sourced by init stages. POSIX sh only.
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# Configure a static IP address on an interface
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# Usage: static_ip <iface> <ip/prefix> <gateway> [dns1] [dns2]
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static_ip() {
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iface="$1" addr="$2" gw="$3" dns1="${4:-}" dns2="${5:-}"
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ip link set "$iface" up
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ip addr add "$addr" dev "$iface"
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ip route add default via "$gw" dev "$iface"
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# Write resolv.conf
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: > /etc/resolv.conf
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[ -n "$dns1" ] && echo "nameserver $dns1" >> /etc/resolv.conf
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[ -n "$dns2" ] && echo "nameserver $dns2" >> /etc/resolv.conf
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}
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# Save current network configuration for persistence across reboots
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# Writes a shell script that can be sourced to restore networking
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save_network_config() {
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dest="${1:-/mnt/data/network/interfaces.sh}"
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mkdir -p "$(dirname "$dest")"
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iface=""
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for d in /sys/class/net/*; do
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name="$(basename "$d")"
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case "$name" in lo|docker*|veth*|br*|cni*) continue ;; esac
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iface="$name"
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break
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done
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[ -z "$iface" ] && return 1
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addr=$(ip -4 addr show "$iface" | sed -n 's/.*inet \([0-9./]*\).*/\1/p' | head -1)
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gw=$(ip route show default 2>/dev/null | sed -n 's/default via \([0-9.]*\).*/\1/p' | head -1)
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cat > "$dest" << SCRIPT
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#!/bin/sh
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# Auto-saved network config — generated by KubeSolo OS
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ip link set $iface up
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ip addr add $addr dev $iface
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ip route add default via $gw dev $iface
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SCRIPT
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# Append DNS if resolv.conf has entries
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if [ -f /etc/resolv.conf ]; then
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echo ": > /etc/resolv.conf" >> "$dest"
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sed -n 's/^nameserver \(.*\)/echo "nameserver \1" >> \/etc\/resolv.conf/p' \
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/etc/resolv.conf >> "$dest"
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fi
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chmod +x "$dest"
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}
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# Get the primary network interface name
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get_primary_iface() {
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for d in /sys/class/net/*; do
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name="$(basename "$d")"
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case "$name" in lo|docker*|veth*|br*|cni*) continue ;; esac
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echo "$name"
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return 0
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done
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return 1
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}
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# Wait for link on an interface
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wait_for_link() {
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iface="$1"
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timeout="${2:-15}"
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i=0
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while [ "$i" -lt "$timeout" ]; do
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if ip link show "$iface" 2>/dev/null | grep -q 'state UP'; then
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return 0
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fi
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sleep 1
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i=$((i + 1))
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done
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return 1
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}
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