func ParseUserData(contents string) (interface{}, error) {
if len(contents) == 0 {
return nil, nil
}
switch {
case config.IsScript(contents):
log.Printf("Parsing user-data as script")
return config.NewScript(contents)
case config.IsCloudConfig(contents):
log.Printf("Parsing user-data as cloud-config")
cc, err := config.NewCloudConfig(contents)
if err != nil {
return nil, err
}
if err := cc.Decode(); err != nil {
return nil, err
}
return cc, nil
case config.IsIgnitionConfig(contents):
return nil, ErrIgnitionConfig
default:
return nil, errors.New("Unrecognized user-data format")
}
}
func saveCloudConfig() error {
userDataBytes, metadata, err := fetchUserData()
if err != nil {
return err
}
userData := string(userDataBytes)
scriptBytes := []byte{}
if config.IsScript(userData) {
scriptBytes = userDataBytes
userDataBytes = []byte{}
} else if isCompose(userData) {
if userDataBytes, err = composeToCloudConfig(userDataBytes); err != nil {
log.Errorf("Failed to convert compose to cloud-config syntax: %v", err)
return err
}
} else if config.IsCloudConfig(userData) {
if _, err := rancherConfig.ReadConfig(userDataBytes, false); err != nil {
log.WithFields(log.Fields{"cloud-config": userData, "err": err}).Warn("Failed to parse cloud-config, not saving.")
userDataBytes = []byte{}
}
} else {
log.Errorf("Unrecognized user-data\n%s", userData)
userDataBytes = []byte{}
}
if _, err := rancherConfig.ReadConfig(userDataBytes, false); err != nil {
log.WithFields(log.Fields{"cloud-config": userData, "err": err}).Warn("Failed to parse cloud-config")
return errors.New("Failed to parse cloud-config")
}
return saveFiles(userDataBytes, scriptBytes, metadata)
}
func saveCloudConfig() error {
var userDataBytes []byte
var metadata datasource.Metadata
ds, err := currentDatasource()
if err != nil {
log.Errorf("Failed to select datasource: %v", err)
return err
}
if ds != nil {
log.Infof("Fetching user-data from datasource %v", ds.Type())
userDataBytes, err = ds.FetchUserdata()
if err != nil {
log.Errorf("Failed fetching user-data from datasource: %v", err)
return err
}
log.Infof("Fetching meta-data from datasource of type %v", ds.Type())
metadata, err = ds.FetchMetadata()
if err != nil {
log.Errorf("Failed fetching meta-data from datasource: %v", err)
return err
}
}
userDataBytes = substituteUserDataVars(userDataBytes, metadata)
userData := string(userDataBytes)
scriptBytes := []byte{}
if config.IsScript(userData) {
scriptBytes = userDataBytes
userDataBytes = []byte{}
} else if isCompose(userData) {
if userDataBytes, err = toCompose(userDataBytes); err != nil {
log.Errorf("Failed to convert to compose syntax: %v", err)
return err
}
} else if config.IsCloudConfig(userData) {
if rancherConfig.ReadConfig(userDataBytes) == nil {
log.WithFields(log.Fields{"cloud-config": userData}).Warn("Failed to parse cloud-config, not saving.")
userDataBytes = []byte{}
}
} else {
log.Errorf("Unrecognized cloud-init\n%s", userData)
userDataBytes = []byte{}
}
userDataBytesMerged, scriptBytes, err := mergeBaseConfig(userDataBytes, scriptBytes)
if err != nil {
log.Errorf("Failed to merge base config: %v", err)
} else if rancherConfig.ReadConfig(userDataBytesMerged) == nil {
log.WithFields(log.Fields{"cloud-config": userData}).Warn("Failed to parse merged cloud-config, not merging.")
} else {
userDataBytes = userDataBytesMerged
}
return saveFiles(userDataBytes, scriptBytes, metadata)
}
// cloudHandler returns a handler that responds with the cloud config for the
// requester.
func cloudHandler(srv server.Server) ContextHandler {
fn := func(ctx context.Context, w http.ResponseWriter, req *http.Request) {
group, err := groupFromContext(ctx)
if err != nil || group.Profile == "" {
http.NotFound(w, req)
return
}
profile, err := srv.ProfileGet(ctx, &pb.ProfileGetRequest{Id: group.Profile})
if err != nil || profile.CloudId == "" {
http.NotFound(w, req)
return
}
contents, err := srv.CloudGet(ctx, profile.CloudId)
if err != nil {
http.NotFound(w, req)
return
}
// collect data for rendering
data := make(map[string]interface{})
if group.Metadata != nil {
err = json.Unmarshal(group.Metadata, &data)
if err != nil {
log.Errorf("error unmarshalling metadata: %v", err)
http.NotFound(w, req)
return
}
}
for key, value := range group.Selector {
data[strings.ToLower(key)] = value
}
// render the template of a cloud config with data
var buf bytes.Buffer
err = renderTemplate(&buf, data, contents)
if err != nil {
http.NotFound(w, req)
return
}
config := buf.String()
if !cloudinit.IsCloudConfig(config) && !cloudinit.IsScript(config) {
log.Error("error parsing user-data")
http.NotFound(w, req)
return
}
if cloudinit.IsCloudConfig(config) {
if _, err = cloudinit.NewCloudConfig(config); err != nil {
log.Errorf("error parsing cloud config: %v", err)
http.NotFound(w, req)
return
}
}
http.ServeContent(w, req, "", time.Time{}, strings.NewReader(config))
}
return ContextHandlerFunc(fn)
}
func mergeBaseConfig(current, currentScript []byte) ([]byte, []byte, error) {
files, err := ioutil.ReadDir(baseConfigDir)
if err != nil {
if os.IsNotExist(err) {
log.Infof("%s does not exist, not merging", baseConfigDir)
return current, currentScript, nil
}
log.Errorf("Failed to read %s: %v", baseConfigDir, err)
return nil, nil, err
}
scriptResult := currentScript
result := []byte{}
for _, file := range files {
if file.IsDir() || strings.HasPrefix(file.Name(), ".") {
continue
}
input := path.Join(baseConfigDir, file.Name())
content, err := ioutil.ReadFile(input)
if err != nil {
log.Errorf("Failed to read %s: %v", input, err)
// ignore error
continue
}
if config.IsScript(string(content)) {
scriptResult = content
continue
}
log.Infof("Merging %s", input)
if isCompose(string(content)) {
content, err = toCompose(content)
if err != nil {
log.Errorf("Failed to convert %s to cloud-config syntax: %v", input, err)
}
}
result, err = util.MergeBytes(result, content)
if err != nil {
log.Errorf("Failed to merge bytes: %v", err)
return nil, nil, err
}
}
if len(result) == 0 {
return current, scriptResult, nil
} else {
result, err := util.MergeBytes(result, current)
return result, scriptResult, err
}
}
func saveCloudConfig() error {
var userDataBytes []byte
var metadata datasource.Metadata
ds, err := currentDatasource()
if err != nil {
log.Errorf("Failed to select datasource: %v", err)
return err
}
if ds != nil {
log.Infof("Fetching user-data from datasource %v", ds.Type())
userDataBytes, err = ds.FetchUserdata()
if err != nil {
log.Errorf("Failed fetching user-data from datasource: %v", err)
return err
}
log.Infof("Fetching meta-data from datasource of type %v", ds.Type())
metadata, err = ds.FetchMetadata()
if err != nil {
log.Errorf("Failed fetching meta-data from datasource: %v", err)
return err
}
}
userDataBytes = substituteUserDataVars(userDataBytes, metadata)
userData := string(userDataBytes)
scriptBytes := []byte{}
if config.IsScript(userData) {
scriptBytes = userDataBytes
userDataBytes = []byte{}
} else if isCompose(userData) {
if userDataBytes, err = toCompose(userDataBytes); err != nil {
log.Errorf("Failed to convert to compose syntax: %v", err)
return err
}
} else if config.IsCloudConfig(userData) {
// nothing to do
} else {
log.Errorf("Unrecognized cloud-init\n%s", userData)
userDataBytes = []byte{}
}
if userDataBytes, scriptBytes, err = mergeBaseConfig(userDataBytes, scriptBytes); err != nil {
log.Errorf("Failed to merge base config: %v", err)
return err
}
return saveFiles(userDataBytes, scriptBytes, metadata)
}
// cloudHandler returns a handler that responds with the cloud config for the
// requester.
func cloudHandler(store Store) ContextHandler {
fn := func(ctx context.Context, w http.ResponseWriter, req *http.Request) {
group, err := groupFromContext(ctx)
if err != nil || group.Spec == "" {
http.NotFound(w, req)
return
}
spec, err := store.Spec(group.Spec)
if err != nil || spec.CloudConfig == "" {
http.NotFound(w, req)
return
}
contents, err := store.CloudConfig(spec.CloudConfig)
if err != nil {
http.NotFound(w, req)
return
}
// collect data for rendering
data := make(map[string]interface{})
for k := range group.Metadata {
data[k] = group.Metadata[k]
}
// render the template of a cloud config with data
var buf bytes.Buffer
err = renderTemplate(&buf, data, contents)
if err != nil {
http.NotFound(w, req)
return
}
config := buf.String()
if !cloudinit.IsCloudConfig(config) && !cloudinit.IsScript(config) {
log.Errorf("error parsing user-data")
http.NotFound(w, req)
return
}
if cloudinit.IsCloudConfig(config) {
if _, err = cloudinit.NewCloudConfig(config); err != nil {
log.Errorf("error parsing cloud config: %v", err)
http.NotFound(w, req)
return
}
}
http.ServeContent(w, req, "", time.Time{}, strings.NewReader(config))
}
return ContextHandlerFunc(fn)
}
// Validate runs a series of validation tests against the given userdata and
// returns a report detailing all of the issues. Presently, only cloud-configs
// can be validated.
func Validate(userdataBytes []byte) (Report, error) {
switch {
case len(userdataBytes) == 0:
return Report{}, nil
case config.IsScript(string(userdataBytes)):
return Report{}, nil
case config.IsCloudConfig(string(userdataBytes)):
return validateCloudConfig(userdataBytes, Rules)
default:
return Report{entries: []Entry{
Entry{kind: entryError, message: `must be "#cloud-config" or begin with "#!"`, line: 1},
}}, nil
}
}
func ParseUserData(contents string) (interface{}, error) {
if len(contents) == 0 {
return nil, nil
}
switch {
case config.IsScript(contents):
log.Printf("Parsing user-data as script")
return config.NewScript(contents)
case config.IsCloudConfig(contents):
log.Printf("Parsing user-data as cloud-config")
return config.NewCloudConfig(contents)
default:
return nil, errors.New("Unrecognized user-data format")
}
}
// cloudHandler returns a handler that responds with the cloud config for the
// requester.
func (s *Server) cloudHandler(core server.Server) ContextHandler {
fn := func(ctx context.Context, w http.ResponseWriter, req *http.Request) {
group, err := groupFromContext(ctx)
if err != nil {
s.logger.WithFields(logrus.Fields{
"labels": labelsFromRequest(nil, req),
}).Infof("No matching group")
http.NotFound(w, req)
return
}
profile, err := core.ProfileGet(ctx, &pb.ProfileGetRequest{Id: group.Profile})
if err != nil {
s.logger.WithFields(logrus.Fields{
"labels": labelsFromRequest(nil, req),
"group": group.Id,
"group_name": group.Name,
}).Infof("No profile named: %s", group.Profile)
http.NotFound(w, req)
return
}
contents, err := core.CloudGet(ctx, profile.CloudId)
if err != nil {
s.logger.WithFields(logrus.Fields{
"labels": labelsFromRequest(nil, req),
"group": group.Id,
"group_name": group.Name,
"profile": group.Profile,
}).Infof("No cloud-config template named: %s", profile.CloudId)
http.NotFound(w, req)
return
}
// match was successful
s.logger.WithFields(logrus.Fields{
"labels": labelsFromRequest(nil, req),
"group": group.Id,
"profile": profile.Id,
}).Debug("Matched a cloud-config template")
// collect data for rendering
data := make(map[string]interface{})
if group.Metadata != nil {
err = json.Unmarshal(group.Metadata, &data)
if err != nil {
s.logger.Errorf("error unmarshalling metadata: %v", err)
http.NotFound(w, req)
return
}
}
for key, value := range group.Selector {
data[strings.ToLower(key)] = value
}
// render the template of a cloud config with data
var buf bytes.Buffer
err = s.renderTemplate(&buf, data, contents)
if err != nil {
http.NotFound(w, req)
return
}
config := buf.String()
if !cloudinit.IsCloudConfig(config) && !cloudinit.IsScript(config) {
s.logger.Error("error parsing user-data")
http.NotFound(w, req)
return
}
if cloudinit.IsCloudConfig(config) {
if _, err = cloudinit.NewCloudConfig(config); err != nil {
s.logger.Errorf("error parsing cloud config: %v", err)
http.NotFound(w, req)
return
}
}
http.ServeContent(w, req, "", time.Time{}, strings.NewReader(config))
}
return ContextHandlerFunc(fn)
}