Improve logic around waiting for garage to be considered ready

go/cmd/entrypoint/garage.go

@@ -123,6 +123,8 @@ var subCmdGarageCLI = subCmd{
 	name:  "cli",
 	descr: "Runs the garage binary, automatically configured to point to the garage sub-process of a running isle daemon",
 	do: func(ctx subCmdCtx) error {
+		rpcNodeAddr := ctx.flags.String("rpc-node-addr", "", "RPC address of the garage instance to hit in the form 'id@host:port'. Will default to a local garage instance if not given, or some random garage instance in the cluster if no local instance is configured.")
+
 		ctx, err := ctx.withParsedFlags(&withParsedFlagsOpts{
 			passthroughArgs: true,
 		})
@@ -145,12 +147,17 @@ var subCmdGarageCLI = subCmd{
 			return errors.New("this host does not have the garage RPC secret")
 		}
 
+		chosenRPCNodeAddr := clientParams.Node.RPCNodeAddr()
+		if *rpcNodeAddr != "" {
+			chosenRPCNodeAddr = *rpcNodeAddr
+		}
+
 		var (
 			binPath = binPath("garage")
 			args    = append([]string{"garage"}, ctx.opts.args...)
 			cliEnv  = append(
 				os.Environ(),
-				"GARAGE_RPC_HOST="+clientParams.Node.RPCNodeAddr(),
+				"GARAGE_RPC_HOST="+chosenRPCNodeAddr,
 				"GARAGE_RPC_SECRET="+clientParams.RPCSecret,
 			)
 		)

go/daemon/children/children.go

@@ -17,6 +17,21 @@ import (
 	"isle/toolkit"
 )
 
+// Opts are optional fields which can be passed into New. A nil value is
+// equivalent to a zero value.
+type Opts struct {
+	// GarageNewCluster should be true if the garage instances being started
+	// are the first instances in a cluster which is being created.
+	GarageNewCluster bool
+}
+
+func (o *Opts) withDefaults() *Opts {
+	if o == nil {
+		o = new(Opts)
+	}
+	return o
+}
+
 // Children manages all child processes of a network. Child processes are
 // comprised of:
 // - nebula
@@ -48,9 +63,12 @@ func New(
 	garageAdminToken string,
 	nebulaDeviceNamer *NebulaDeviceNamer,
 	hostBootstrap bootstrap.Bootstrap,
+	opts *Opts,
 ) (
 	*Children, error,
 ) {
+	opts = opts.withDefaults()
+
 	logger.Info(ctx, "Loading secrets")
 	garageRPCSecret, err := daecommon.GetGarageRPCSecret(ctx, secretsStore)
 	if err != nil && !errors.Is(err, secrets.ErrNotFound) {
@@ -113,7 +131,12 @@ func New(
 	}
 
 	if err := waitForGarage(
-		ctx, c.logger, networkConfig, garageAdminToken, hostBootstrap,
+		ctx,
+		c.logger,
+		networkConfig,
+		garageAdminToken,
+		hostBootstrap,
+		opts.GarageNewCluster,
 	); err != nil {
 		logger.Warn(ctx, "Failed waiting for garage processes to initialize, shutting down child processes", err)
 		c.Shutdown()
@@ -225,7 +248,12 @@ func (c *Children) reloadGarage(
 
 	if anyChanged {
 		if err := waitForGarage(
-			ctx, c.logger, networkConfig, c.garageAdminToken, hostBootstrap,
+			ctx,
+			c.logger,
+			networkConfig,
+			c.garageAdminToken,
+			hostBootstrap,
+			false,
 		); err != nil {
 			return fmt.Errorf("waiting for garage to start: %w", err)
 		}

go/daemon/children/garage.go

@@ -27,6 +27,7 @@ func waitForGarage(
 	networkConfig daecommon.NetworkConfig,
 	adminToken string,
 	hostBootstrap bootstrap.Bootstrap,
+	newCluster bool,
 ) error {
 
 	allocs := networkConfig.Storage.Allocations
@@ -52,7 +53,7 @@ func waitForGarage(
 		)
 		logger.Info(ctx, "Waiting for garage instance to be healthy")
 
-		if err := adminClient.Wait(ctx); err != nil {
+		if err := adminClient.Wait(ctx, !newCluster); err != nil {
 			return fmt.Errorf("waiting for garage instance %q to start up: %w", adminAddr, err)
 		}
 

go/daemon/network/garage.go

@@ -11,6 +11,7 @@ import (
 	"isle/garage"
 	"isle/nebula"
 	"isle/secrets"
+	"isle/toolkit"
 	"net"
 	"net/netip"
 	"path/filepath"
@@ -84,7 +85,6 @@ func garageApplyLayout(
 	adminToken string,
 	prevHost, currHost bootstrap.Host,
 ) error {
-
 	var (
 		adminClient = newGarageAdminClient(
 			logger, networkConfig, adminToken, currHost,
@@ -321,23 +321,47 @@ func garageWaitForAlloc(
 	defer adminClient.Close()
 	ctx = mctx.WithAnnotator(ctx, alloc)
 
-	for {
-		logger.Info(ctx, "Checking if node has synced bucket list")
-		buckets, err := adminClient.ListBuckets(ctx)
-		if err != nil {
-			return fmt.Errorf("listing buckets: %w", err)
-		} else if len(buckets) == 0 {
-			logger.WarnString(ctx, "No buckets found, will wait a bit and try again")
-			select {
-			case <-time.After(1 * time.Second):
-				continue
-			case <-ctx.Done():
-				return ctx.Err()
+	logger.Info(ctx, "Checking if garage instance has synced bucket list")
+	if err := toolkit.UntilTrue(
+		ctx,
+		logger,
+		2*time.Second,
+		func() (bool, error) {
+			buckets, err := adminClient.ListBuckets(ctx)
+			if err != nil {
+				return false, fmt.Errorf("listing buckets: %w", err)
+			} else if len(buckets) == 0 {
+				logger.Info(ctx, "Bucket list not yet synced")
+				return false, nil
 			}
-		}
 
-		return nil
+			return true, nil
+		},
+	); err != nil {
+		return fmt.Errorf("waiting for bucket list to sync: %w", err)
 	}
+
+	logger.Info(ctx, "Checking if garage instance has synced credentials")
+	if err := toolkit.UntilTrue(
+		ctx,
+		logger,
+		2*time.Second,
+		func() (bool, error) {
+			credentials, err := adminClient.ListS3APICredentials(ctx)
+			if err != nil {
+				return false, fmt.Errorf("listing credentials: %w", err)
+			} else if len(credentials) == 0 {
+				logger.Info(ctx, "Credentials not yet synced")
+				return false, nil
+			}
+
+			return true, nil
+		},
+	); err != nil {
+		return fmt.Errorf("waiting for credentials list to sync: %w", err)
+	}
+
+	return nil
 }
 
 // garageNodeBuddyPeers returns the "buddy" peers of the given host, based on

go/daemon/network/network.go

@@ -479,6 +479,9 @@ func (n *network) initialize(
 		n.opts.GarageAdminToken,
 		n.nebulaDeviceNamer,
 		n.currBootstrap,
+		&children.Opts{
+			GarageNewCluster: isCreate,
+		},
 	)
 	if err != nil {
 		return fmt.Errorf("creating child processes: %w", err)

go/garage/admin_client.go

@@ -163,7 +163,8 @@ type ClusterLayout struct {
 // ClusterStatus is returned from the Status endpoint, describing the currently
 // known state of the cluster.
 type ClusterStatus struct {
-	Nodes []KnownNode `json:"nodes"`
+	LayoutVersion int         `json:"layoutVersion"`
+	Nodes         []KnownNode `json:"nodes"`
 }
 
 // Status returns the current state of the cluster.
@@ -177,53 +178,63 @@ func (c *AdminClient) Status(ctx context.Context) (ClusterStatus, error) {
 // Wait will block until the instance connected to can see at least
 // ReplicationFactor other garage instances. If the context is canceled it
 // will return the context error.
-func (c *AdminClient) Wait(ctx context.Context) error {
+func (c *AdminClient) Wait(
+	ctx context.Context, clusterAlreadyInitialized bool,
+) error {
+	c.logger.Info(ctx, "Waiting for instance to connect to other instances")
+	err := toolkit.UntilTrue(
+		ctx,
+		c.logger,
+		2*time.Second,
+		func() (bool, error) {
+			clusterStatus, err := c.Status(ctx)
+			if ctxErr := ctx.Err(); ctxErr != nil {
+				return false, ctxErr
 
-	for first := true; ; first = false {
-		if !first {
-			select {
-			case <-time.After(2 * time.Second):
-			case <-ctx.Done():
-				return ctx.Err()
+			} else if err != nil {
+				ctx := mctx.Annotate(ctx, "errMsg", err.Error())
+				c.logger.Info(ctx, "Instance is not online yet")
+				return false, nil
 			}
-		}
 
-		c.logger.Debug(ctx, "Getting cluster status")
-		clusterStatus, err := c.Status(ctx)
-		if ctxErr := ctx.Err(); ctxErr != nil {
-			return ctxErr
+			var numUp int
 
-		} else if err != nil {
-			ctx := mctx.Annotate(ctx, "errMsg", err.Error())
-			c.logger.Info(ctx, "Instance is not online yet")
-			continue
-		}
-
-		var numUp int
-
-		for _, node := range clusterStatus.Nodes {
-			// There seems to be some kind of step between IsUp becoming true
-			// and garage actually loading the full state of a node, so we check
-			// for the HostName as well. We could also use LastSeenSecsAgo, but
-			// that remains null for the node being queried so it's more
-			// annoying to use.
-			if node.IsUp && node.HostName != "" {
-				numUp++
+			for _, node := range clusterStatus.Nodes {
+				// There seems to be some kind of step between IsUp becoming
+				// true and garage actually loading the full state of a node, so
+				// we check for the HostName as well. We could also use
+				// LastSeenSecsAgo, but that remains null for the node being
+				// queried so it's more annoying to use.
+				if node.IsUp && node.HostName != "" {
+					numUp++
+				}
 			}
-		}
 
-		ctx := mctx.Annotate(ctx,
-			"numNodes", len(clusterStatus.Nodes),
-			"numUp", numUp,
-		)
+			ctx := mctx.Annotate(ctx,
+				"layoutVersion", clusterStatus.LayoutVersion,
+				"numNodes", len(clusterStatus.Nodes),
+				"numUp", numUp,
+			)
 
-		if numUp >= ReplicationFactor {
-			c.logger.Debug(ctx, "instance appears to be online")
-			return nil
-		}
+			if clusterAlreadyInitialized && clusterStatus.LayoutVersion == 0 {
+				c.logger.Info(ctx, "Cluster layout has not yet propagated")
+				return false, nil
+			}
 
-		c.logger.Info(ctx, "Instance is not joined to the cluster yet")
+			if numUp < ReplicationFactor {
+				c.logger.Info(ctx, "Not enough other instances in the cluster are seen as 'up'")
+				return false, nil
+			}
+
+			return true, nil
+		},
+	)
+
+	if err != nil {
+		return fmt.Errorf("waiting for cluster status: %w", err)
 	}
+
+	return err
 }
 
 // CreateS3APICredentials creates an S3APICredentials with the given name. The
@@ -252,6 +263,26 @@ func (c *AdminClient) CreateS3APICredentials(
 	}, err
 }
 
+// S3APICredentialsPublic are the publicly available fields of an
+// S3APICredentials. These are visibile to all nodes in the cluster.
+type S3APICredentialsPublic struct {
+	ID   string
+	Name string
+}
+
+// ListS3APICredentials returns all S3APICredentials in the cluster, without
+// returning their
+func (c *AdminClient) ListS3APICredentials(
+	ctx context.Context,
+) (
+	[]S3APICredentialsPublic, error,
+) {
+	// https://garagehq.deuxfleurs.fr/api/garage-admin-v1.html#tag/Key/operation/ListKeys
+	var res []S3APICredentialsPublic
+	err := c.do(ctx, &res, "GET", "/v1/key?list", nil)
+	return res, err
+}
+
 // CreateBucket creates a bucket with the given global alias, returning its ID.
 func (c *AdminClient) CreateBucket(
 	ctx context.Context, globalAlias string,

go/toolkit/toolkit.go

@@ -2,7 +2,14 @@
 // specific part of isle.
 package toolkit
 
-import "reflect"
+import (
+	"context"
+	"reflect"
+	"time"
+
+	"dev.mediocregopher.com/mediocre-go-lib.git/mctx"
+	"dev.mediocregopher.com/mediocre-go-lib.git/mlog"
+)
 
 // IsZero returns true if the value is equal to its zero value according to
 // reflect.DeepEqual.
@@ -15,3 +22,33 @@ func IsZero[T any](v T) bool {
 func Ptr[T any](v T) *T {
 	return &v
 }
+
+// UntilTrue will repeatedly call the given callback, waiting the given duration
+// between calls until:
+// - The context is canceled, returning the context's error
+// - The callback returns an error, returning that error
+// - The callback returns true, returning nil
+func UntilTrue(
+	ctx context.Context,
+	logger *mlog.Logger,
+	period time.Duration,
+	fn func() (bool, error),
+) error {
+	ctx = mctx.Annotate(ctx, "retryAfter", period)
+
+	for {
+		if ok, err := fn(); err != nil {
+			return err
+		} else if ok {
+			return nil
+		}
+
+		logger.Info(ctx, "Waiting before retrying")
+
+		select {
+		case <-time.After(period):
+		case <-ctx.Done():
+			return ctx.Err()
+		}
+	}
+}

tasks/bugs/garage-apply-layout-before-stopping-instance.md

@@ -1,5 +1,5 @@
 ---
-type: host
+type: task
 ---
 
 When removing a storage allocation the new layout should be applied _before_ the

tasks/bugs/garage-credential-propagation-fix.md

@@ -1,13 +0,0 @@
----
-type: task
----
-
-It seems in real world testing that this error came up after `isle storage
-allocation add` had already completed:
-
-```
-ERROR [daemon/networks/micropelago.net] Background job failed errMsg="getting hosts from garage: listing objects: Forbidden: No such key: XXXXXXXXXXXXXXXXXXXXXXXXXX" workerLabel=reloadHosts
-```
-
-Isle should wait until bucket credentials are propagated to the new garage
-instance before considering it to be online.

tasks/bugs/garage-orphan-remover-race-condition.md

@@ -0,0 +1,8 @@
+---
+type: task
+---
+
+There is a race condition in the garage orphan removal worker. Basically when
+host A is adding its first allocation, it's possible that it hasn't yet updated
+the host info in the common bucket, and so host B removes it from the layout
+prior to that host info being updated.

tasks/misc/network-integration-tests-sigint.md

@@ -0,0 +1,11 @@
+---
+type: task
+---
+
+When SIGINT (ctrl-c) is sent to the integration tests as they are running, they
+should cancel themselves and clean up all sub-processes as best as they can. A
+second SIGINT can then be used to immediately kill, if for some reason cleanup
+fails to occur cleanly.
+
+Alternatively, maybe the `integration_test.sh` script can do some kind of
+process cleanup.

tasks/misc/test-message-logger-ts.md

@@ -0,0 +1,6 @@
+---
+type: task
+---
+
+On each message which is logged the test message logger (toolkit.NewTestLogger)
+should include the duration since then the test started.

tasks/remote-debugging/daemon-rpc.md

@@ -0,0 +1,11 @@
+---
+type: task
+status: draft
+---
+
+It should be possible for a host to enable access to its daemon's RPC socket
+_but only for a specific other host_.
+
+At the same time, the `isle` tool would need to be able to specify a remote host
+to operate against. How this interacts with local state (like staged firewall)
+needs to be dealt with as well.

tasks/remote-debugging/logs.md

@@ -0,0 +1,9 @@
+---
+type: task
+status: draft
+---
+
+It would be very convenient for debugging hosts remotely if we could see the
+logs of another host. This would include CHILD logs and down (even if the daemon
+is set to output a lower log level to stdout). Being able to tail the logs
+remotely would be especially nice.

tasks/remote-debugging/restart-command.md

@@ -0,0 +1,5 @@
+---
+type: task
+---
+
+It should be possible to restart the daemon via its RPC socket.