func main() {
flags := struct {
help bool
pretty bool
inFile string
outFile string
}{}
flag.BoolVar(&flags.help, "help", false, "print help and exit")
flag.BoolVar(&flags.pretty, "pretty", false, "indent the output file")
flag.StringVar(&flags.inFile, "in-file", "/dev/stdin", "input file (YAML)")
flag.StringVar(&flags.outFile, "out-file", "/dev/stdout", "output file (JSON)")
flag.Parse()
if flags.help {
flag.Usage()
return
}
dataIn, err := ioutil.ReadFile(flags.inFile)
if err != nil {
stderr("Failed to read: %v", err)
os.Exit(1)
}
cfg, err := config.ParseAsV2_0_0(dataIn)
if err != nil {
stderr("Failed to parse: %v", err)
os.Exit(1)
}
var dataOut []byte
if flags.pretty {
dataOut, err = json.MarshalIndent(&cfg, "", " ")
dataOut = append(dataOut, '\n')
} else {
dataOut, err = json.Marshal(&cfg)
}
if err != nil {
stderr("Failed to marshal output: %v", err)
os.Exit(1)
}
if err := ioutil.WriteFile(flags.outFile, dataOut, 0640); err != nil {
stderr("Failed to write: %v", err)
os.Exit(1)
}
}
// ignitionHandler returns a handler that responds with the Ignition config
// for the requester. The Ignition file referenced in the Profile is parsed
// as raw Ignition (for .ign/.ignition) or rendered to a Fuze config (YAML)
// and converted to Ignition. Ignition configs are served as HTTP JSON
// responses.
func (s *Server) ignitionHandler(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.IgnitionGet(ctx, profile.IgnitionId)
if err != nil {
s.logger.WithFields(logrus.Fields{
"labels": labelsFromRequest(nil, req),
"group": group.Id,
"group_name": group.Name,
"profile": group.Profile,
}).Infof("No Ignition or Fuze template named: %s", profile.IgnitionId)
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 an Ignition or Fuze template")
// Skip rendering if raw Ignition JSON is provided
if isIgnition(profile.IgnitionId) {
_, err := ignition.Parse([]byte(contents))
if err != nil {
s.logger.Warningf("warning parsing Ignition JSON: %v", err)
}
s.writeJSON(w, []byte(contents))
return
}
// Fuze 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
}
}
data["query"] = req.URL.RawQuery
for key, value := range group.Selector {
data[strings.ToLower(key)] = value
}
// render the template for an Ignition config with data
var buf bytes.Buffer
err = s.renderTemplate(&buf, data, contents)
if err != nil {
http.NotFound(w, req)
return
}
// Parse fuze config into an Ignition config
config, err := fuze.ParseAsV2_0_0(buf.Bytes())
if err == nil {
s.renderJSON(w, config)
return
}
s.logger.Errorf("error parsing Ignition config: %v", err)
http.NotFound(w, req)
return
}
return ContextHandlerFunc(fn)
}