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cmd: Only set memory/CPU limits on run (fix #6879)

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This commit is contained in:
Matthew Holt
2025-03-06 15:11:38 -07:00
parent 84364ffcd0
commit a686f7c346
2 changed files with 35 additions and 32 deletions
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19
cmd/commandfuncs.go
View File

@ -171,6 +171,9 @@ func cmdStart(fl Flags) (int, error) {
func cmdRun(fl Flags) (int, error) {
caddy.TrapSignals()
logger := caddy.Log()
setResourceLimits(logger)
configFlag := fl.String("config")
configAdapterFlag := fl.String("adapter")
resumeFlag := fl.Bool("resume")
@ -196,18 +199,18 @@ func cmdRun(fl Flags) (int, error) {
config, err = os.ReadFile(caddy.ConfigAutosavePath)
if errors.Is(err, fs.ErrNotExist) {
// not a bad error; just can't resume if autosave file doesn't exist
caddy.Log().Info("no autosave file exists", zap.String("autosave_file", caddy.ConfigAutosavePath))
logger.Info("no autosave file exists", zap.String("autosave_file", caddy.ConfigAutosavePath))
resumeFlag = false
} else if err != nil {
return caddy.ExitCodeFailedStartup, err
} else {
if configFlag == "" {
caddy.Log().Info("resuming from last configuration",
logger.Info("resuming from last configuration",
zap.String("autosave_file", caddy.ConfigAutosavePath))
} else {
// if they also specified a config file, user should be aware that we're not
// using it (doing so could lead to data/config loss by overwriting!)
caddy.Log().Warn("--config and --resume flags were used together; ignoring --config and resuming from last configuration",
logger.Warn("--config and --resume flags were used together; ignoring --config and resuming from last configuration",
zap.String("autosave_file", caddy.ConfigAutosavePath))
}
}
@ -225,7 +228,7 @@ func cmdRun(fl Flags) (int, error) {
if pidfileFlag != "" {
err := caddy.PIDFile(pidfileFlag)
if err != nil {
caddy.Log().Error("unable to write PID file",
logger.Error("unable to write PID file",
zap.String("pidfile", pidfileFlag),
zap.Error(err))
}
@ -236,7 +239,7 @@ func cmdRun(fl Flags) (int, error) {
if err != nil {
return caddy.ExitCodeFailedStartup, fmt.Errorf("loading initial config: %v", err)
}
caddy.Log().Info("serving initial configuration")
logger.Info("serving initial configuration")
// if we are to report to another process the successful start
// of the server, do so now by echoing back contents of stdin
@ -272,15 +275,15 @@ func cmdRun(fl Flags) (int, error) {
switch runtime.GOOS {
case "windows":
if os.Getenv("HOME") == "" && os.Getenv("USERPROFILE") == "" && !hasXDG {
caddy.Log().Warn("neither HOME nor USERPROFILE environment variables are set - please fix; some assets might be stored in ./caddy")
logger.Warn("neither HOME nor USERPROFILE environment variables are set - please fix; some assets might be stored in ./caddy")
}
case "plan9":
if os.Getenv("home") == "" && !hasXDG {
caddy.Log().Warn("$home environment variable is empty - please fix; some assets might be stored in ./caddy")
logger.Warn("$home environment variable is empty - please fix; some assets might be stored in ./caddy")
}
default:
if os.Getenv("HOME") == "" && !hasXDG {
caddy.Log().Warn("$HOME environment variable is empty - please fix; some assets might be stored in ./caddy")
logger.Warn("$HOME environment variable is empty - please fix; some assets might be stored in ./caddy")
}
}

48
cmd/main.go
View File

@ -69,30 +69,6 @@ func Main() {
os.Exit(caddy.ExitCodeFailedStartup)
}
logger := caddy.Log()
// Configure the maximum number of CPUs to use to match the Linux container quota (if any)
// See https://pkg.go.dev/runtime#GOMAXPROCS
undo, err := maxprocs.Set(maxprocs.Logger(logger.Sugar().Infof))
defer undo()
if err != nil {
caddy.Log().Warn("failed to set GOMAXPROCS", zap.Error(err))
}
// Configure the maximum memory to use to match the Linux container quota (if any) or system memory
// See https://pkg.go.dev/runtime/debug#SetMemoryLimit
_, _ = memlimit.SetGoMemLimitWithOpts(
memlimit.WithLogger(
slog.New(zapslog.NewHandler(logger.Core())),
),
memlimit.WithProvider(
memlimit.ApplyFallback(
memlimit.FromCgroup,
memlimit.FromSystem,
),
),
)
if err := defaultFactory.Build().Execute(); err != nil {
var exitError *exitError
if errors.As(err, &exitError) {
@ -488,6 +464,30 @@ func printEnvironment() {
}
}
func setResourceLimits(logger *zap.Logger) {
// Configure the maximum number of CPUs to use to match the Linux container quota (if any)
// See https://pkg.go.dev/runtime#GOMAXPROCS
undo, err := maxprocs.Set(maxprocs.Logger(logger.Sugar().Infof))
defer undo()
if err != nil {
caddy.Log().Warn("failed to set GOMAXPROCS", zap.Error(err))
}
// Configure the maximum memory to use to match the Linux container quota (if any) or system memory
// See https://pkg.go.dev/runtime/debug#SetMemoryLimit
_, _ = memlimit.SetGoMemLimitWithOpts(
memlimit.WithLogger(
slog.New(zapslog.NewHandler(logger.Core())),
),
memlimit.WithProvider(
memlimit.ApplyFallback(
memlimit.FromCgroup,
memlimit.FromSystem,
),
),
)
}
// StringSlice is a flag.Value that enables repeated use of a string flag.
type StringSlice []string