Adolfo Delorenzo
d900fa920e
Implement a lightweight cloud-init system for first-boot configuration: - Go parser for YAML config (hostname, network, KubeSolo settings) - Static/DHCP network modes with DNS override - KubeSolo extra flags and API server SAN configuration - Portainer Edge Agent and air-gapped deployment support - New init stage 45-cloud-init.sh runs before network/hostname stages - Stages 50/60 skip gracefully when cloud-init has already applied - Build script compiles static Linux/amd64 binary (~2.7 MB) - 17 unit tests covering parsing, validation, and example files - Full documentation at docs/cloud-init.md Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
80 lines
2.1 KiB
Go
80 lines
2.1 KiB
Go
package cloudinit
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import (
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"fmt"
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"log/slog"
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"os"
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"path/filepath"
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"strings"
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)
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// ApplyKubeSolo writes KubeSolo configuration files based on cloud-init config.
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// These files are read by init stage 90-kubesolo.sh when building the
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// KubeSolo command line.
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func ApplyKubeSolo(cfg *Config, configDir string) error {
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if err := os.MkdirAll(configDir, 0o755); err != nil {
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return fmt.Errorf("creating config dir %s: %w", configDir, err)
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}
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// Write extra flags file (consumed by 90-kubesolo.sh)
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flags := buildExtraFlags(cfg)
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if flags != "" {
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flagsPath := filepath.Join(configDir, "extra-flags")
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if err := os.WriteFile(flagsPath, []byte(flags+"\n"), 0o644); err != nil {
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return fmt.Errorf("writing extra-flags: %w", err)
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}
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slog.Info("wrote KubeSolo extra flags", "path", flagsPath, "flags", flags)
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}
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// Write config.yaml for KubeSolo if we have settings beyond defaults
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if err := writeKubeSoloConfig(cfg, configDir); err != nil {
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return err
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}
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return nil
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}
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func buildExtraFlags(cfg *Config) string {
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var parts []string
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if cfg.KubeSolo.ExtraFlags != "" {
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parts = append(parts, cfg.KubeSolo.ExtraFlags)
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}
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// Add extra SANs from cloud-init
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for _, san := range cfg.KubeSolo.ExtraSANs {
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parts = append(parts, "--apiserver-extra-sans", san)
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}
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return strings.Join(parts, " ")
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}
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func writeKubeSoloConfig(cfg *Config, configDir string) error {
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var lines []string
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lines = append(lines, "# Generated by KubeSolo OS cloud-init")
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lines = append(lines, "data-dir: /var/lib/kubesolo")
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if cfg.KubeSolo.LocalStorage != nil {
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if *cfg.KubeSolo.LocalStorage {
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lines = append(lines, "local-storage: true")
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} else {
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lines = append(lines, "local-storage: false")
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}
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} else {
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lines = append(lines, "local-storage: true")
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}
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lines = append(lines, "bind-address: 0.0.0.0")
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lines = append(lines, "cluster-cidr: 10.42.0.0/16")
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lines = append(lines, "service-cidr: 10.43.0.0/16")
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dest := filepath.Join(configDir, "config.yaml")
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content := strings.Join(lines, "\n") + "\n"
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if err := os.WriteFile(dest, []byte(content), 0o644); err != nil {
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return fmt.Errorf("writing config.yaml: %w", err)
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}
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slog.Info("wrote KubeSolo config", "path", dest)
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return nil
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}
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