92 lines
2 KiB
Go
92 lines
2 KiB
Go
package main
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import (
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"errors"
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"log"
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"net/http"
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"os"
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"go.uber.org/zap"
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"go.uber.org/zap/zapcore"
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"github.com/baez90/nurse/api"
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"github.com/baez90/nurse/check"
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"github.com/baez90/nurse/config"
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"github.com/baez90/nurse/protocols/redis"
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)
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var (
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logLevel = zapcore.InfoLevel
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cfgFile string
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cfg config.Nurse
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)
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func main() {
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if err := prepareFlags(); err != nil {
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log.Fatalf("Failed to parse flags: %v", err)
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}
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setupLogging()
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logger := zap.L()
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nurseInstance, err := config.New(
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config.WithValuesFrom(cfg),
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config.WithConfigFile(cfgFile),
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config.WithServersFromEnv(),
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config.WithEndpointsFromEnv(),
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)
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if err != nil {
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logger.Fatal("Failed to load config from environment", zap.Error(err))
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}
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logger.Debug("Loaded config", zap.Any("config", nurseInstance))
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chkRegistry := check.NewRegistry()
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if err = chkRegistry.Register(redis.Module()); err != nil {
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logger.Fatal("Failed to register Redis module", zap.Error(err))
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}
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srvLookup, err := nurseInstance.ServerLookup()
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if err != nil {
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logger.Fatal("Failed to prepare server lookup", zap.Error(err))
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}
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mux, err := api.PrepareMux(nurseInstance, chkRegistry, srvLookup)
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if err != nil {
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logger.Fatal("Failed to prepare server mux", zap.Error(err))
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}
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if err := http.ListenAndServe(":8080", mux); err != nil {
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if errors.Is(err, http.ErrServerClosed) {
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return
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}
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logger.Fatal("Failed to serve HTTP", zap.Error(err))
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}
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}
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func setupLogging() {
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cfg := zap.NewProductionConfig()
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cfg.Level = zap.NewAtomicLevelAt(logLevel)
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logger, err := cfg.Build()
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if err != nil {
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log.Fatalf("Failed to setup logging: %v", err)
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}
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zap.ReplaceGlobals(logger)
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}
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func prepareFlags() error {
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set := config.ConfigureFlags(&cfg)
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set.Var(&logLevel, "log-level", "Log level to use")
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set.StringVar(
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&cfgFile,
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"config",
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config.LookupEnvOr[string]("NURSE_CONFIG", "", config.Identity[string]),
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"Config file to load, if not set $HOME/.nurse.yaml, /etc/nurse/config.yaml and ./nurse.yaml are tried - optional",
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)
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return set.Parse(os.Args)
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}
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