# Changelog

All notable changes to KubeSolo OS are documented in this file.

Format based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
versioning follows [Semantic Versioning](https://semver.org/spec/v2.0.0.html).

## [0.2.0] - 2026-02-12

### Added
- Cloud-init: support all documented KubeSolo CLI flags (`--local-storage-shared-path`, `--debug`, `--pprof-server`, `--portainer-edge-id`, `--portainer-edge-key`, `--portainer-edge-async`)
- Cloud-init: `full-config.yaml` example showing all supported parameters
- Cloud-init: KubeSolo configuration reference table in docs/cloud-init.md
- Security hardening: mount hardening, sysctl, kernel module lock, AppArmor profiles
- ARM64 Raspberry Pi support with A/B boot via tryboot
- BootEnv abstraction for GRUB and RPi boot environments
- Go 1.25.5 installed on host for native builds

## [0.1.0] - 2026-02-12

First release with all 5 design-doc phases complete. ISO boots and runs K8s pods.

### Added

#### Custom Kernel
- Custom kernel build (6.18.2-tinycore64) with container-critical configs
- Added CONFIG_CGROUP_BPF, CONFIG_DEVTMPFS, CONFIG_DEVTMPFS_MOUNT, CONFIG_MEMCG, CONFIG_CFS_BANDWIDTH
- Stripped unnecessary subsystems (sound, GPU, wireless, Bluetooth, etc.)
- Selective kernel module install — only modules.list + transitive deps in initramfs

#### Init System (Phase 1)
- POSIX sh init system with staged boot (00-early-mount through 90-kubesolo)
- switch_root from initramfs to SquashFS root
- Persistent data partition mount with bind-mounts for K8s state
- Kernel module loading, sysctl tuning, network, hostname, NTP
- Emergency shell fallback on boot failure
- Device node creation via mknod fallback from sysfs

#### Cloud-Init (Phase 2)
- Go-based cloud-init parser (~2.7 MB static binary)
- Network configuration: DHCP and static IP modes
- Hostname and machine-id generation
- KubeSolo configuration (node-name, extra flags)
- Portainer Edge Agent integration via K8s manifest injection
- Persistent config saved to /mnt/data/ for next-boot fast path
- 22 Go tests

#### A/B Atomic Updates (Phase 3)
- 4-partition GPT disk image: EFI + System A + System B + Data
- GRUB 2 bootloader with A/B slot selection and boot counter rollback
- Go update agent (~6.0 MB static binary) with check, apply, activate, rollback commands
- Health check: containerd + K8s API + node Ready verification
- Update server protocol: HTTP serving latest.json + image files
- K8s CronJob for automated update checks (every 6 hours)
- Zero external Go dependencies — uses kubectl/ctr exec commands

#### Production Hardening (Phase 4)
- Ed25519 image signing with pure Go stdlib (zero external deps)
- Key generation, signing, and verification CLI commands
- Portainer Edge Agent deployment via cloud-init
- SSH extension injection for debugging (hack/inject-ssh.sh)
- Boot time and resource usage benchmarks
- Deployment guide documentation

#### Distribution & Fleet Management (Phase 5)
- Gitea Actions CI/CD (test + build + shellcheck on push, release on tags)
- OCI container image packaging (scratch-based)
- Prometheus metrics endpoint (zero-dependency text exposition format)
- USB provisioning script with cloud-init injection
- ARM64 cross-compilation support

#### Build System
- Makefile with full build orchestration
- Dockerized reproducible builds (build/Dockerfile.builder)
- Component fetching with version pinning
- ISO and raw disk image creation
- Fast rebuild path (`make quick`)

#### Documentation
- Architecture design document
- Boot flow reference
- A/B update flow reference
- Cloud-init configuration reference
- Deployment and operations guide

### Fixed
- Replaced `grep -oP` with POSIX-safe `sed` in functions.sh (BusyBox compatibility)
- Replaced `grep -qiE` with `grep -qi -e` pattern (POSIX compliance)
- Fixed KVM flag handling in dev-vm.sh (bash array context)
- Added iptables table pre-initialization before kube-proxy start (nf_tables issue)
- Added /dev/kmsg and /etc/machine-id creation for kubelet
- Added CA certificates bundle to initramfs (containerd TLS verification for Docker Hub)
- Added DNS fallback (10.0.2.3 + 8.8.8.8) when DHCP client doesn't populate resolv.conf
- Added headless Service to Portainer Edge Agent manifest (agent peer discovery DNS)
- Added kubesolo.edge_id/edge_key kernel boot parameters for Portainer Edge
- Added auto-format of unformatted data disks on first boot
- Rewrote dev-vm.sh for macOS: bsdtar ISO extraction, Homebrew mkfs.ext4 detection, direct kernel boot, TCG acceleration, port 8080 forwarding
- Kubeconfig now served via HTTP on port 8080 (serial console truncates base64 lines)
- Added 127.0.0.1 and 10.0.2.15 to API server SANs for QEMU port forwarding
- dev-vm.sh now works on Linux: fallback ISO extraction via isoinfo or loop mount, KVM auto-detection, platform-aware error messages