2024-06-17 18:51:02 +00:00
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// Package daemon implements the isle daemon, which is a long-running service
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2024-07-06 13:36:48 +00:00
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// managing all isle background tasks and sub-processes for a single network.
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2022-10-26 21:21:31 +00:00
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package daemon
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import (
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2024-06-17 18:51:02 +00:00
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"context"
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2024-09-10 20:51:33 +00:00
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"errors"
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2022-10-26 21:21:31 +00:00
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"fmt"
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2024-06-17 18:51:02 +00:00
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"isle/bootstrap"
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2024-09-07 13:11:04 +00:00
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"isle/daemon/daecommon"
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2024-09-09 14:34:00 +00:00
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"isle/daemon/network"
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2024-07-07 18:01:10 +00:00
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"isle/nebula"
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2024-09-24 09:03:18 +00:00
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"sort"
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2024-07-06 13:36:48 +00:00
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"sync"
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2022-10-26 21:21:31 +00:00
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2024-06-22 15:49:56 +00:00
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"dev.mediocregopher.com/mediocre-go-lib.git/mlog"
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2022-10-26 21:21:31 +00:00
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)
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2024-09-07 11:52:32 +00:00
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var _ RPC = (*Daemon)(nil)
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2024-11-11 14:32:15 +00:00
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type joinedNetwork struct {
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id string
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network.Network
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config *daecommon.NetworkConfig
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}
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2024-09-07 11:52:32 +00:00
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// Daemon implements all methods of the Daemon interface, plus others used
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// to manage this particular implementation.
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//
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// Daemon manages all child processes and state required by the isle
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// service, as well as an HTTP socket over which RPC calls will be served.
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//
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// Inner Children instance(s) will be wrapped such that they will be
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// automatically shutdown and re-created whenever there's changes in the network
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// which require the configuration to be changed (e.g. a new nebula lighthouse).
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// During such an inner restart all methods will return ErrRestarting, except
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// Shutdown which will block until the currently executing restart is finished
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// and then shutdown cleanly from there.
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//
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// While still starting up the Daemon for the first time all methods will return
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// ErrInitializing, except Shutdown which will block until initialization is
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// canceled.
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type Daemon struct {
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logger *mlog.Logger
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networkLoader network.Loader
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daemonConfig daecommon.Config
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2024-09-23 17:04:14 +00:00
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l sync.RWMutex
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networks map[string]joinedNetwork
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}
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2024-09-09 14:34:00 +00:00
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// New initializes and returns a Daemon.
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func New(
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ctx context.Context,
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logger *mlog.Logger,
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networkLoader network.Loader,
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daemonConfig daecommon.Config,
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) (
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*Daemon, error,
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2024-07-07 10:44:49 +00:00
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) {
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d := &Daemon{
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logger: logger,
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networkLoader: networkLoader,
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daemonConfig: daemonConfig,
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networks: map[string]joinedNetwork{},
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}
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2024-11-10 21:13:06 +00:00
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loadableNetworks, err := networkLoader.Loadable(ctx)
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if err != nil {
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return nil, fmt.Errorf("listing loadable networks: %w", err)
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2024-06-24 16:55:36 +00:00
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}
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2024-12-14 14:57:07 +00:00
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if err := validateConfig(
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ctx, networkLoader, daemonConfig, loadableNetworks,
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); err != nil {
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return nil, fmt.Errorf("validating daemon config: %w", err)
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}
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2024-09-23 17:04:14 +00:00
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for _, creationParams := range loadableNetworks {
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var (
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id = creationParams.ID
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networkConfig = pickNetworkConfig(
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daemonConfig.Networks, creationParams,
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)
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2024-07-06 13:36:48 +00:00
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)
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2024-11-11 14:32:15 +00:00
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n, err := networkLoader.Load(
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ctx,
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networkLogger(logger, creationParams),
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creationParams,
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&network.Opts{
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Config: networkConfig,
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},
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2024-07-20 09:07:11 +00:00
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)
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if err != nil {
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2024-09-09 14:34:00 +00:00
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return nil, fmt.Errorf("loading network %q: %w", id, err)
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2022-10-26 21:21:31 +00:00
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}
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2024-12-14 14:57:07 +00:00
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d.networks[id] = joinedNetwork{id, n, networkConfig}
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}
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2024-09-09 14:34:00 +00:00
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return d, nil
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2024-07-07 18:01:10 +00:00
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}
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2024-09-07 11:52:32 +00:00
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// CreateNetwork will initialize a new network using the given parameters.
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// - name: Human-readable name of the network.
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// - domain: Primary domain name that network services are served under.
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// - ipNet: An IP subnet, in CIDR form, which will be the overall range of
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// possible IPs in the network. The first IP in this network range will become
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// this first host's IP.
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// - hostName: The name of this first host in the network.
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//
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// The daemon on which this is called will become the first host in the network,
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// and will have full administrative privileges.
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2024-09-09 14:34:00 +00:00
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//
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// Errors:
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// - network.ErrInvalidConfig
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func (d *Daemon) CreateNetwork(
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ctx context.Context,
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name, domain string, ipNet nebula.IPNet, hostName nebula.HostName,
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) error {
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2024-09-09 14:34:00 +00:00
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d.l.Lock()
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defer d.l.Unlock()
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2024-07-13 12:34:06 +00:00
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2024-11-11 14:32:15 +00:00
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var (
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creationParams = bootstrap.NewCreationParams(name, domain)
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2024-12-14 14:57:07 +00:00
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networkConfig = pickNetworkConfig(
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d.daemonConfig.Networks, creationParams,
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)
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networkLogger = networkLogger(d.logger, creationParams)
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2024-11-11 14:32:15 +00:00
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)
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2024-09-23 17:04:14 +00:00
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if joined, err := alreadyJoined(ctx, d.networks, creationParams); err != nil {
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return fmt.Errorf("checking if already joined to network: %w", err)
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} else if joined {
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2024-09-09 14:34:00 +00:00
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return ErrAlreadyJoined
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2024-07-14 11:11:18 +00:00
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}
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2024-12-13 12:52:39 +00:00
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networkLogger.Info(ctx, "Creating network")
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2024-11-10 21:13:06 +00:00
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n, err := d.networkLoader.Create(
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ctx,
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2024-12-13 12:52:39 +00:00
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networkLogger,
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2024-07-14 11:11:18 +00:00
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creationParams,
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2024-09-09 14:34:00 +00:00
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ipNet,
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2024-07-07 18:01:10 +00:00
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hostName,
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2024-11-11 14:32:15 +00:00
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&network.Opts{
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Config: networkConfig,
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},
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2024-07-07 18:01:10 +00:00
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)
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if err != nil {
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2024-09-09 14:34:00 +00:00
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return fmt.Errorf("creating network: %w", err)
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2024-07-07 18:01:10 +00:00
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}
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2024-12-13 12:52:39 +00:00
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networkLogger.Info(ctx, "Network created successfully")
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2024-12-14 14:57:07 +00:00
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d.networks[creationParams.ID] = joinedNetwork{
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creationParams.ID, n, networkConfig,
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}
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2024-07-14 11:11:18 +00:00
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return nil
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2024-07-06 13:36:48 +00:00
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}
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2022-10-26 21:21:31 +00:00
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2024-09-07 11:52:32 +00:00
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// JoinNetwork joins the Daemon to an existing network using the given
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// Bootstrap.
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//
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// Errors:
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// - ErrAlreadyJoined
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func (d *Daemon) JoinNetwork(
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2024-09-09 14:34:00 +00:00
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ctx context.Context, newBootstrap network.JoiningBootstrap,
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2024-07-07 10:44:49 +00:00
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) error {
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2024-11-11 14:32:15 +00:00
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d.l.Lock()
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defer d.l.Unlock()
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2024-09-10 20:51:33 +00:00
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var (
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2024-11-11 14:32:15 +00:00
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creationParams = newBootstrap.Bootstrap.NetworkCreationParams
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networkID = creationParams.ID
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2024-12-14 14:57:07 +00:00
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networkConfig = pickNetworkConfig(
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d.daemonConfig.Networks, creationParams,
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)
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networkLogger = networkLogger(
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2024-12-13 12:52:39 +00:00
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d.logger, newBootstrap.Bootstrap.NetworkCreationParams,
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)
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2024-09-10 20:51:33 +00:00
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)
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2024-09-23 17:04:14 +00:00
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if joined, err := alreadyJoined(ctx, d.networks, creationParams); err != nil {
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return fmt.Errorf("checking if already joined to network: %w", err)
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} else if joined {
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2024-07-07 10:44:49 +00:00
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return ErrAlreadyJoined
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}
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2024-12-13 12:52:39 +00:00
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networkLogger.Info(ctx, "Joining network")
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2024-11-10 21:13:06 +00:00
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n, err := d.networkLoader.Join(
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2024-09-09 14:34:00 +00:00
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ctx,
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2024-12-13 12:52:39 +00:00
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networkLogger,
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2024-09-09 14:34:00 +00:00
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newBootstrap,
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2024-11-11 14:32:15 +00:00
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&network.Opts{
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Config: networkConfig,
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},
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2024-09-09 14:34:00 +00:00
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)
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if err != nil {
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return fmt.Errorf(
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"joining network %q: %w", networkID, err,
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)
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2024-07-07 18:01:10 +00:00
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}
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2024-12-13 12:52:39 +00:00
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networkLogger.Info(ctx, "Network joined successfully")
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2024-12-14 14:57:07 +00:00
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d.networks[networkID] = joinedNetwork{networkID, n, networkConfig}
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2024-07-20 09:07:11 +00:00
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return nil
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2024-07-07 10:44:49 +00:00
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}
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2024-09-09 14:34:00 +00:00
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func withNetwork[Res any](
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ctx context.Context,
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d *Daemon,
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2024-11-11 14:32:15 +00:00
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fn func(context.Context, joinedNetwork) (Res, error),
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2024-09-09 14:34:00 +00:00
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) (
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Res, error,
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) {
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d.l.RLock()
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defer d.l.RUnlock()
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2024-07-12 14:03:37 +00:00
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2024-11-10 21:13:06 +00:00
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network, err := pickNetwork(ctx, d.networkLoader, d.networks)
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2024-09-23 17:04:14 +00:00
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if err != nil {
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2024-09-09 14:34:00 +00:00
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var zero Res
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2024-11-09 20:13:33 +00:00
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return zero, err
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2024-09-07 11:52:32 +00:00
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}
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2024-09-23 17:04:14 +00:00
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return fn(ctx, network)
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2024-09-09 14:34:00 +00:00
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}
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2024-09-07 11:52:32 +00:00
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2024-09-24 09:03:18 +00:00
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// GetNetworks returns all networks which have been joined by the Daemon,
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// ordered by their name.
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func (d *Daemon) GetNetworks(
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ctx context.Context,
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) (
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[]bootstrap.CreationParams, error,
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) {
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d.l.RLock()
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defer d.l.RUnlock()
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res := make([]bootstrap.CreationParams, 0, len(d.networks))
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for id, network := range d.networks {
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creationParams, err := network.GetNetworkCreationParams(ctx)
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if err != nil {
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return nil, fmt.Errorf(
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"getting network creation params of network %q: %w", id, err,
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)
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}
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res = append(res, creationParams)
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}
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sort.Slice(res, func(i, j int) bool {
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return res[i].Name < res[j].Name
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})
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return res, nil
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}
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2024-12-07 19:39:13 +00:00
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// GetBootstrap implements the method for the network.RPC interface.
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func (d *Daemon) GetBootstrap(
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2024-07-13 12:34:06 +00:00
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ctx context.Context,
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) (
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2024-12-07 19:39:13 +00:00
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bootstrap.Bootstrap, error,
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2024-07-13 12:34:06 +00:00
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) {
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2024-09-09 14:34:00 +00:00
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return withNetwork(
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ctx,
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d,
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func(
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2024-11-11 14:32:15 +00:00
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ctx context.Context, n joinedNetwork,
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2024-09-09 14:34:00 +00:00
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) (
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2024-12-07 19:39:13 +00:00
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bootstrap.Bootstrap, error,
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2024-09-09 14:34:00 +00:00
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) {
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2024-12-07 19:39:13 +00:00
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return n.GetBootstrap(ctx)
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2024-09-09 14:34:00 +00:00
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},
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)
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2024-07-13 12:34:06 +00:00
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}
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2024-12-07 19:39:13 +00:00
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// GetGarageClientParams implements the method for the network.RPC interface.
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func (d *Daemon) GetGarageClientParams(
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2024-09-07 11:52:32 +00:00
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ctx context.Context,
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) (
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2024-12-07 19:39:13 +00:00
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network.GarageClientParams, error,
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2024-09-07 11:52:32 +00:00
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) {
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2024-09-09 14:34:00 +00:00
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return withNetwork(
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ctx,
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d,
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func(
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2024-11-11 14:32:15 +00:00
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|
|
ctx context.Context, n joinedNetwork,
|
2024-09-09 14:34:00 +00:00
|
|
|
) (
|
2024-12-07 19:39:13 +00:00
|
|
|
network.GarageClientParams, error,
|
2024-09-09 14:34:00 +00:00
|
|
|
) {
|
2024-12-07 19:39:13 +00:00
|
|
|
return n.GetGarageClientParams(ctx)
|
2024-09-09 14:34:00 +00:00
|
|
|
},
|
|
|
|
)
|
2024-09-07 11:52:32 +00:00
|
|
|
}
|
|
|
|
|
2024-09-09 14:34:00 +00:00
|
|
|
// RemoveHost implements the method for the network.RPC interface.
|
2024-09-07 11:52:32 +00:00
|
|
|
func (d *Daemon) RemoveHost(ctx context.Context, hostName nebula.HostName) error {
|
2024-09-09 14:34:00 +00:00
|
|
|
_, err := withNetwork(
|
|
|
|
ctx,
|
|
|
|
d,
|
|
|
|
func(
|
2024-11-11 14:32:15 +00:00
|
|
|
ctx context.Context, n joinedNetwork,
|
2024-09-09 14:34:00 +00:00
|
|
|
) (
|
|
|
|
struct{}, error,
|
|
|
|
) {
|
|
|
|
return struct{}{}, n.RemoveHost(ctx, hostName)
|
|
|
|
},
|
2024-07-21 15:03:59 +00:00
|
|
|
)
|
2024-09-09 14:34:00 +00:00
|
|
|
return err
|
2024-09-07 11:52:32 +00:00
|
|
|
}
|
|
|
|
|
2024-09-09 14:34:00 +00:00
|
|
|
// CreateHost implements the method for the network.RPC interface.
|
2024-09-07 11:52:32 +00:00
|
|
|
func (d *Daemon) CreateHost(
|
2024-07-13 14:31:52 +00:00
|
|
|
ctx context.Context,
|
|
|
|
hostName nebula.HostName,
|
2024-09-09 14:34:00 +00:00
|
|
|
opts network.CreateHostOpts,
|
2024-07-13 14:31:52 +00:00
|
|
|
) (
|
2024-09-09 14:34:00 +00:00
|
|
|
network.JoiningBootstrap, error,
|
2024-07-13 14:31:52 +00:00
|
|
|
) {
|
2024-09-09 14:34:00 +00:00
|
|
|
return withNetwork(
|
|
|
|
ctx,
|
|
|
|
d,
|
|
|
|
func(
|
2024-11-11 14:32:15 +00:00
|
|
|
ctx context.Context, n joinedNetwork,
|
2024-09-09 14:34:00 +00:00
|
|
|
) (
|
|
|
|
network.JoiningBootstrap, error,
|
|
|
|
) {
|
|
|
|
return n.CreateHost(ctx, hostName, opts)
|
|
|
|
},
|
2024-07-20 10:36:21 +00:00
|
|
|
)
|
2024-07-13 14:31:52 +00:00
|
|
|
}
|
|
|
|
|
2024-09-09 14:34:00 +00:00
|
|
|
// CreateNebulaCertificate implements the method for the network.RPC interface.
|
2024-09-07 11:52:32 +00:00
|
|
|
func (d *Daemon) CreateNebulaCertificate(
|
2024-07-13 14:08:13 +00:00
|
|
|
ctx context.Context,
|
|
|
|
hostName nebula.HostName,
|
|
|
|
hostPubKey nebula.EncryptingPublicKey,
|
|
|
|
) (
|
|
|
|
nebula.Certificate, error,
|
|
|
|
) {
|
2024-09-09 14:34:00 +00:00
|
|
|
return withNetwork(
|
|
|
|
ctx,
|
|
|
|
d,
|
|
|
|
func(
|
2024-11-11 14:32:15 +00:00
|
|
|
ctx context.Context, n joinedNetwork,
|
2024-09-09 14:34:00 +00:00
|
|
|
) (
|
|
|
|
nebula.Certificate, error,
|
|
|
|
) {
|
|
|
|
return n.CreateNebulaCertificate(ctx, hostName, hostPubKey)
|
|
|
|
},
|
|
|
|
)
|
2024-07-13 14:08:13 +00:00
|
|
|
}
|
|
|
|
|
2024-11-11 14:32:15 +00:00
|
|
|
// GetConfig implements the method for the network.RPC interface.
|
2024-10-23 18:18:11 +00:00
|
|
|
func (d *Daemon) GetConfig(
|
|
|
|
ctx context.Context,
|
|
|
|
) (
|
|
|
|
daecommon.NetworkConfig, error,
|
|
|
|
) {
|
|
|
|
return withNetwork(
|
|
|
|
ctx,
|
|
|
|
d,
|
|
|
|
func(
|
2024-11-11 14:32:15 +00:00
|
|
|
ctx context.Context, n joinedNetwork,
|
2024-10-23 18:18:11 +00:00
|
|
|
) (
|
|
|
|
daecommon.NetworkConfig, error,
|
|
|
|
) {
|
|
|
|
return n.GetConfig(ctx)
|
|
|
|
},
|
|
|
|
)
|
|
|
|
}
|
|
|
|
|
2024-11-11 14:32:15 +00:00
|
|
|
// SetConfig implements the method for the network.RPC interface.
|
2024-11-10 21:49:36 +00:00
|
|
|
func (d *Daemon) SetConfig(
|
2024-12-14 14:57:07 +00:00
|
|
|
ctx context.Context, networkConfig daecommon.NetworkConfig,
|
2024-11-10 21:49:36 +00:00
|
|
|
) error {
|
2024-12-14 14:57:07 +00:00
|
|
|
d.l.RLock()
|
|
|
|
defer d.l.RUnlock()
|
2024-11-11 14:32:15 +00:00
|
|
|
|
2024-12-14 14:57:07 +00:00
|
|
|
pickedNetwork, err := pickNetwork(ctx, d.networkLoader, d.networks)
|
|
|
|
if err != nil {
|
|
|
|
return err
|
|
|
|
}
|
|
|
|
|
|
|
|
if pickedNetwork.config != nil {
|
|
|
|
return ErrManagedNetworkConfig
|
|
|
|
}
|
|
|
|
|
|
|
|
// Reconstruct the daemon config using the actual in-use network configs,
|
|
|
|
// along with this new one, and do a validation before calling SetConfig.
|
|
|
|
|
|
|
|
daemonConfig := d.daemonConfig
|
|
|
|
daemonConfig.Networks = map[string]daecommon.NetworkConfig{
|
|
|
|
pickedNetwork.id: networkConfig,
|
|
|
|
}
|
|
|
|
|
|
|
|
for id, joinedNetwork := range d.networks {
|
|
|
|
if pickedNetwork.id == id {
|
|
|
|
continue
|
|
|
|
}
|
|
|
|
|
|
|
|
joinedNetworkConfig, err := joinedNetwork.GetConfig(ctx)
|
|
|
|
if err != nil {
|
|
|
|
return fmt.Errorf("getting network config of %q: %w", id, err)
|
|
|
|
}
|
|
|
|
|
|
|
|
daemonConfig.Networks[id] = joinedNetworkConfig
|
|
|
|
}
|
|
|
|
|
|
|
|
if err := daemonConfig.Validate(); err != nil {
|
|
|
|
return network.ErrInvalidConfig.WithData(err.Error())
|
|
|
|
}
|
|
|
|
|
|
|
|
return pickedNetwork.SetConfig(ctx, networkConfig)
|
2024-11-10 21:49:36 +00:00
|
|
|
}
|
|
|
|
|
2024-09-07 11:52:32 +00:00
|
|
|
// Shutdown blocks until all resources held or created by the daemon,
|
|
|
|
// including child processes it has started, have been cleaned up.
|
|
|
|
//
|
|
|
|
// If this returns an error then it's possible that child processes are
|
|
|
|
// still running and are no longer managed.
|
|
|
|
func (d *Daemon) Shutdown() error {
|
2024-07-07 10:44:49 +00:00
|
|
|
d.l.Lock()
|
|
|
|
defer d.l.Unlock()
|
|
|
|
|
2024-09-23 17:04:14 +00:00
|
|
|
var (
|
|
|
|
errCh = make(chan error, len(d.networks))
|
|
|
|
errs []error
|
|
|
|
)
|
|
|
|
|
|
|
|
for id := range d.networks {
|
|
|
|
var (
|
|
|
|
id = id
|
|
|
|
n = d.networks[id]
|
|
|
|
)
|
|
|
|
|
|
|
|
go func() {
|
|
|
|
if err := n.Shutdown(); err != nil {
|
|
|
|
errCh <- fmt.Errorf("shutting down network %q: %w", id, err)
|
|
|
|
}
|
|
|
|
errCh <- nil
|
|
|
|
}()
|
|
|
|
}
|
|
|
|
|
|
|
|
for range cap(errCh) {
|
|
|
|
errs = append(errs, <-errCh)
|
2024-07-07 10:44:49 +00:00
|
|
|
}
|
2024-09-09 14:34:00 +00:00
|
|
|
|
2024-09-23 17:04:14 +00:00
|
|
|
return errors.Join(errs...)
|
2022-10-26 21:21:31 +00:00
|
|
|
}
|