Brian Picciano
8c3e6a2845
In a world where the daemon can manage more than one network, the Daemon is really responsible only for knowing which networks are currently joined, creating/joining/leaving networks, and routing incoming RPC requests to the correct network handler as needed. The new network package, with its Network interface, inherits most of the logic that Daemon used to have, leaving Daemon only the parts needed for the functionality just described. There's a lot of cleanup done here in order to really nail down the separation of concerns between the two, especially around directory creation.
100 lines
2.6 KiB
Go
100 lines
2.6 KiB
Go
package main
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import (
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"context"
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"fmt"
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"os"
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"isle/daemon"
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"isle/daemon/daecommon"
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"dev.mediocregopher.com/mediocre-go-lib.git/mlog"
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)
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// TODO it would be good to have an `isle daemon config-check` kind of command,
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// which could be run prior to a systemd service restart to make sure we don't
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// restart the service into a configuration that will definitely fail.
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var subCmdDaemon = subCmd{
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name: "daemon",
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descr: "Runs the isle daemon (Default if no sub-command given)",
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do: func(ctx subCmdCtx) error {
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flags := ctx.flagSet(false)
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daemonConfigPath := flags.StringP(
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"config-path", "c", "",
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"Optional path to a daemon.yml file to load configuration from.",
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)
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dumpConfig := flags.Bool(
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"dump-config", false,
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"Write the default configuration file to stdout and exit.",
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)
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logLevelStr := flags.StringP(
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"log-level", "l", "info",
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`Maximum log level which should be output. Values can be "debug", "info", "warn", "error", "fatal". Does not apply to sub-processes`,
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)
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if err := flags.Parse(ctx.args); err != nil {
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return fmt.Errorf("parsing flags: %w", err)
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}
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if *dumpConfig {
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return daecommon.CopyDefaultConfig(os.Stdout, envAppDirPath)
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}
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logLevel := mlog.LevelFromString(*logLevelStr)
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if logLevel == nil {
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return fmt.Errorf("couldn't parse log level %q", *logLevelStr)
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}
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logger := ctx.logger.WithMaxLevel(logLevel.Int())
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// TODO check that daemon is either running as root, or that the
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// required linux capabilities are set.
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// TODO check that the tun module is loaded (for nebula).
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daemonConfig, err := daecommon.LoadConfig(envAppDirPath, *daemonConfigPath)
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if err != nil {
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return fmt.Errorf("loading daemon config: %w", err)
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}
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daemonInst, err := daemon.New(
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ctx, logger, daemonConfig, envBinDirPath, nil,
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)
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if err != nil {
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return fmt.Errorf("starting daemon: %w", err)
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}
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defer func() {
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logger.Info(ctx, "Stopping child processes")
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if err := daemonInst.Shutdown(); err != nil {
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logger.Error(ctx, "Shutting down daemon cleanly failed, there may be orphaned child processes", err)
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}
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logger.Info(ctx, "Child processes successfully stopped")
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}()
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{
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logger := logger.WithNamespace("http")
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httpSrv, err := newHTTPServer(
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ctx, logger, daemonInst,
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)
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if err != nil {
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return fmt.Errorf("starting HTTP server: %w", err)
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}
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defer func() {
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// see comment in daemonInst shutdown logic regarding background
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// context.
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logger.Info(ctx, "Shutting down HTTP socket")
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if err := httpSrv.Shutdown(context.Background()); err != nil {
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logger.Error(ctx, "Failed to cleanly shutdown http server", err)
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}
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}()
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}
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<-ctx.Done()
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return nil
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},
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}
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