// LoadClientConfig loads the client config from file if the file exists,
// otherwise will load from environment variables.
func LoadClientConfig(cf string) (*api.CalicoAPIConfig, error) {
if _, err := os.Stat(cf); err != nil {
log.Infof("Config file cannot be read - reading config from environment")
cf = ""
}
return client.LoadClientConfig(cf)
}
func initializeClient() {
var err error
if config, err = datastoreClient.LoadClientConfig(""); err != nil {
panic(err)
}
if client, err = datastoreClient.New(*config); err != nil {
panic(err)
}
if os.Getenv("CALICO_DEBUG") != "" {
log.SetLevel(log.DebugLevel)
log.Debugln("Debug logging enabled")
}
}
// main performs startup operations for a node.
// For now, this only creates the ClusterGUID. Ultimately,
// all of the function from startup.py will be moved here.
func main() {
// Build a Calico client.
log.Info("Creating Calico client")
cfg, err := client.LoadClientConfig("")
if err != nil {
panic(fmt.Sprintf("Error loading config: %s", err))
}
c, err := backend.NewClient(*cfg)
if err != nil {
panic(fmt.Sprintf("Error creating client: %s", err))
}
log.Info("Ensuring datastore is initialized")
err = c.EnsureInitialized()
if err != nil {
panic(fmt.Sprintf("Error initializing datastore: %s", err))
}
log.Info("Datastore is initialized")
// Make sure we have a global cluster ID set.
log.Info("Ensuring a cluster guid is set")
ensureClusterGuid(c)
}