mirror of https://github.com/k3s-io/k3s
103 lines
2.4 KiB
Go
103 lines
2.4 KiB
Go
package bootstrap
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import (
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"encoding/json"
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"io"
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"net/http"
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"os"
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"path/filepath"
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"time"
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"github.com/k3s-io/k3s/pkg/daemons/config"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
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)
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func Handler(bootstrap *config.ControlRuntimeBootstrap) http.Handler {
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return http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
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rw.Header().Set("Content-Type", "application/json")
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ReadFromDisk(rw, bootstrap)
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})
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}
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// ReadFromDisk reads the bootstrap data from the files on disk and
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// writes their content in JSON form to the given io.Writer.
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func ReadFromDisk(w io.Writer, bootstrap *config.ControlRuntimeBootstrap) error {
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paths, err := ObjToMap(bootstrap)
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if err != nil {
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return nil
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}
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dataMap := make(map[string]File)
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for pathKey, path := range paths {
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if path == "" {
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continue
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}
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data, err := os.ReadFile(path)
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if err != nil {
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logrus.Warnf("failed to read %s", path)
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continue
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}
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info, err := os.Stat(path)
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if err != nil {
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return err
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}
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dataMap[pathKey] = File{
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Timestamp: info.ModTime(),
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Content: data,
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}
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}
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return json.NewEncoder(w).Encode(dataMap)
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}
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// File is a representation of a certificate
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// or key file within the bootstrap context that contains
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// the contents of the file as well as a timestamp from
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// when the file was last modified.
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type File struct {
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Timestamp time.Time
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Content []byte
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}
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type PathsDataformat map[string]File
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// WriteToDiskFromStorage writes the contents of the given reader to the paths
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// derived from within the ControlRuntimeBootstrap.
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func WriteToDiskFromStorage(files PathsDataformat, bootstrap *config.ControlRuntimeBootstrap) error {
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paths, err := ObjToMap(bootstrap)
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if err != nil {
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return err
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}
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for pathKey, bsf := range files {
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path, ok := paths[pathKey]
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if !ok || path == "" {
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continue
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}
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if err := os.MkdirAll(filepath.Dir(path), 0700); err != nil {
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return errors.Wrapf(err, "failed to mkdir %s", filepath.Dir(path))
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}
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if err := os.WriteFile(path, bsf.Content, 0600); err != nil {
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return errors.Wrapf(err, "failed to write to %s", path)
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}
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if err := os.Chtimes(path, bsf.Timestamp, bsf.Timestamp); err != nil {
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return errors.Wrapf(err, "failed to update modified time on %s", path)
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}
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}
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return nil
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}
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func ObjToMap(obj interface{}) (map[string]string, error) {
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bytes, err := json.Marshal(obj)
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if err != nil {
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return nil, err
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}
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data := map[string]string{}
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return data, json.Unmarshal(bytes, &data)
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}
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