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>
55 lines
1.2 KiB
Go
55 lines
1.2 KiB
Go
package cloudinit
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import (
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"fmt"
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"os"
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"gopkg.in/yaml.v3"
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)
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// Parse reads a cloud-init YAML file and returns the parsed config.
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func Parse(path string) (*Config, error) {
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data, err := os.ReadFile(path)
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if err != nil {
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return nil, fmt.Errorf("reading cloud-init file %s: %w", path, err)
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}
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return ParseBytes(data)
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}
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// ParseBytes parses cloud-init YAML from a byte slice.
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func ParseBytes(data []byte) (*Config, error) {
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var cfg Config
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if err := yaml.Unmarshal(data, &cfg); err != nil {
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return nil, fmt.Errorf("parsing cloud-init YAML: %w", err)
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}
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if err := validate(&cfg); err != nil {
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return nil, fmt.Errorf("validating cloud-init config: %w", err)
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}
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// Apply defaults
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if cfg.Network.Mode == "" {
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cfg.Network.Mode = "dhcp"
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}
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return &cfg, nil
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}
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func validate(cfg *Config) error {
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switch cfg.Network.Mode {
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case "", "dhcp":
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// valid
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case "static":
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if cfg.Network.Address == "" {
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return fmt.Errorf("static network mode requires 'address' field")
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}
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if cfg.Network.Gateway == "" {
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return fmt.Errorf("static network mode requires 'gateway' field")
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}
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default:
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return fmt.Errorf("unknown network mode: %q (expected 'dhcp' or 'static')", cfg.Network.Mode)
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}
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return nil
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}
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