118 lines
2.7 KiB
Go
118 lines
2.7 KiB
Go
package openwrt
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import (
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"bytes"
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"context"
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"os"
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"os/exec"
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"forge.cadoles.com/Cadoles/emissary/internal/agent"
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"forge.cadoles.com/Cadoles/emissary/internal/openwrt/uci"
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ucispec "forge.cadoles.com/Cadoles/emissary/internal/spec/uci"
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"github.com/pkg/errors"
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"gitlab.com/wpetit/goweb/logger"
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)
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type UCIController struct {
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binPath string
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currentSpecRevision int
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}
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// Name implements node.Controller.
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func (*UCIController) Name() string {
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return "uci-controller"
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}
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// Reconcile implements node.Controller.
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func (c *UCIController) Reconcile(ctx context.Context, state *agent.State) error {
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uciSpec := ucispec.NewSpec()
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if err := state.GetSpec(ucispec.NameUCI, uciSpec); err != nil {
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if errors.Is(err, agent.ErrSpecNotFound) {
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logger.Info(ctx, "could not find uci spec, doing nothing")
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return nil
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}
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return errors.WithStack(err)
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}
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logger.Info(ctx, "retrieved spec", logger.F("spec", uciSpec.SpecName()), logger.F("revision", uciSpec.SpecRevision()))
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if c.currentSpecRevision == uciSpec.SpecRevision() {
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logger.Info(ctx, "spec revision did not change, doing nothing")
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return nil
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}
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if err := c.updateConfiguration(ctx, uciSpec); err != nil {
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err = errors.WithStack(err)
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logger.Error(ctx, "could not update configuration", logger.CapturedE(err))
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return nil
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}
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c.currentSpecRevision = uciSpec.SpecRevision()
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logger.Info(ctx, "updating current spec revision", logger.F("revision", c.currentSpecRevision))
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return nil
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}
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func (c *UCIController) updateConfiguration(ctx context.Context, spec *ucispec.Spec) error {
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logger.Info(ctx, "importing uci config")
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if err := c.importConfig(ctx, spec.Config); err != nil {
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return errors.WithStack(err)
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}
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if err := c.execPostImportCommands(ctx, spec.PostImportCommands); err != nil {
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return errors.WithStack(err)
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}
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return nil
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}
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func (c *UCIController) importConfig(ctx context.Context, uci *uci.UCI) error {
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cmd := exec.CommandContext(ctx, c.binPath, "import")
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var buf bytes.Buffer
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if _, err := buf.WriteString(uci.Export()); err != nil {
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return errors.WithStack(err)
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}
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cmd.Stdin = &buf
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cmd.Stderr = os.Stderr
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cmd.Stdout = os.Stdout
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if err := cmd.Run(); err != nil {
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return errors.WithStack(err)
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}
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return nil
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}
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func (c *UCIController) execPostImportCommands(ctx context.Context, commands []*ucispec.UCIPostImportCommand) error {
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for _, postImportCmd := range commands {
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cmd := exec.CommandContext(ctx, postImportCmd.Command, postImportCmd.Args...)
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cmd.Stderr = os.Stderr
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cmd.Stdout = os.Stdout
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if err := cmd.Run(); err != nil {
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return errors.WithStack(err)
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}
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}
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return nil
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}
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func NewUCIController(binPath string) *UCIController {
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return &UCIController{
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binPath: binPath,
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currentSpecRevision: -1,
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}
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}
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var _ agent.Controller = &UCIController{}
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