Merge pull request #3003 from galal-hussein/fix_etcd_only_nodes

Fix etcd only nodes

go.mod

@@ -93,7 +93,7 @@ require (
 	github.com/opencontainers/selinux v1.6.0
 	github.com/pierrec/lz4 v2.5.2+incompatible
 	github.com/pkg/errors v0.9.1
-	github.com/rancher/dynamiclistener v0.2.1
+	github.com/rancher/dynamiclistener v0.2.2
 	github.com/rancher/remotedialer v0.2.0
 	github.com/rancher/wrangler v0.6.1
 	github.com/rancher/wrangler-api v0.6.0

go.sum

@@ -768,8 +768,8 @@ github.com/prometheus/tsdb v0.7.1/go.mod h1:qhTCs0VvXwvX/y3TZrWD7rabWM+ijKTux40T
 github.com/quobyte/api v0.1.8/go.mod h1:jL7lIHrmqQ7yh05OJ+eEEdHr0u/kmT1Ff9iHd+4H6VI=
 github.com/rakelkar/gonetsh v0.0.0-20190930180311-e5c5ffe4bdf0 h1:iXE9kmlAqhusXxzkXictdNgWS7p4ZBnmv9SdyMgTf6E=
 github.com/rakelkar/gonetsh v0.0.0-20190930180311-e5c5ffe4bdf0/go.mod h1:4XHkfaUj+URzGO9sohoAgt2V9Y8nIW7fugpu0E6gShk=
-github.com/rancher/dynamiclistener v0.2.1 h1:QiY1jxs2TOLrKB04G36vE2ehEvPMPGiWp8zEHLKB1nE=
+github.com/rancher/dynamiclistener v0.2.2 h1:70dMwOr1sqb6mQqfU2nDb/fr5cv7HJjH+kFYzoxb8KU=
-github.com/rancher/dynamiclistener v0.2.1/go.mod h1:9WusTANoiRr8cDWCTtf5txieulezHbpv4vhLADPp0zU=
+github.com/rancher/dynamiclistener v0.2.2/go.mod h1:9WusTANoiRr8cDWCTtf5txieulezHbpv4vhLADPp0zU=
 github.com/rancher/moq v0.0.0-20190404221404-ee5226d43009/go.mod h1:wpITyDPTi/Na5h73XkbuEf2AP9fbgrIGqqxVzFhYD6U=
 github.com/rancher/remotedialer v0.2.0 h1:xD7t3K6JYwTdAsxmGtTHQMkEkFgKouQ1foLxVW424Dc=
 github.com/rancher/remotedialer v0.2.0/go.mod h1:tkU8ZvrR5lRgaKWaX71nAy6daeqvPFx/lJEnbW7tXSI=

pkg/cli/server/server.go

@@ -267,8 +267,13 @@ func run(app *cli.Context, cfg *cmds.Server) error {
 	}
 
 	go func() {
+		if !serverConfig.ControlConfig.DisableAPIServer {
 			<-serverConfig.ControlConfig.Runtime.APIServerReady
 			logrus.Info("Kube API server is now running")
+		} else {
+			<-serverConfig.ControlConfig.Runtime.ETCDReady
+			logrus.Info("ETCD server is now running")
+		}
 		logrus.Info(version.Program + " is up and running")
 		if notifySocket != "" {
 			os.Setenv("NOTIFY_SOCKET", notifySocket)

pkg/cluster/cluster.go

@@ -12,6 +12,7 @@ import (
 	"github.com/rancher/k3s/pkg/cluster/managed"
 	"github.com/rancher/k3s/pkg/daemons/config"
 	"github.com/rancher/k3s/pkg/etcd"
+	"github.com/sirupsen/logrus"
 )
 
 type Cluster struct {
@@ -41,7 +42,7 @@ func (c *Cluster) Start(ctx context.Context) (<-chan struct{}, error) {
 		defer close(ready)
 
 		// try to get /db/info urls first before attempting to use join url
-		clientURLs, _, err := etcd.ClientURLs(ctx, c.clientAccessInfo)
+		clientURLs, _, err := etcd.ClientURLs(ctx, c.clientAccessInfo, c.config.PrivateIP)
 		if err != nil {
 			return nil, err
 		}
@@ -58,6 +59,12 @@ func (c *Cluster) Start(ctx context.Context) (<-chan struct{}, error) {
 			return nil, err
 		}
 		c.setupEtcdProxy(ctx, etcdProxy)
+
+		// remove etcd member if it exists
+		if err := c.managedDB.RemoveSelf(ctx); err != nil {
+			logrus.Warnf("Failed to remove this node from etcd members")
+		}
+
 		return ready, nil
 	}
 

pkg/cluster/managed/drivers.go

@@ -23,6 +23,7 @@ type Driver interface {
 	EndpointName() string
 	Snapshot(ctx context.Context, config *config.Control) error
 	GetMembersClientURLs(ctx context.Context) ([]string, error)
+	RemoveSelf(ctx context.Context) error
 }
 
 func RegisterDriver(d Driver) {

pkg/etcd/controller.go

@@ -87,5 +87,5 @@ func (h *handler) onRemove(key string, node *v1.Node) (*v1.Node, error) {
 	if !ok {
 		return node, nil
 	}
-	return node, h.etcd.removePeer(h.ctx, id, address)
+	return node, h.etcd.removePeer(h.ctx, id, address, false)
 }

pkg/etcd/etcd.go

@@ -245,7 +245,7 @@ func (e *ETCD) Start(ctx context.Context, clientAccessInfo *clientaccess.Info) e
 
 // join attempts to add a member to an existing cluster
 func (e *ETCD) join(ctx context.Context, clientAccessInfo *clientaccess.Info) error {
-	clientURLs, memberList, err := ClientURLs(ctx, clientAccessInfo)
+	clientURLs, memberList, err := ClientURLs(ctx, clientAccessInfo, e.config.PrivateIP)
 	if err != nil {
 		return err
 	}
@@ -524,7 +524,7 @@ func (e *ETCD) cluster(ctx context.Context, forceNew bool, options executor.Init
 }
 
 // removePeer removes a peer from the cluster. The peer ID and IP address must both match.
-func (e *ETCD) removePeer(ctx context.Context, id, address string) error {
+func (e *ETCD) removePeer(ctx context.Context, id, address string, removeSelf bool) error {
 	members, err := e.client.MemberList(ctx)
 	if err != nil {
 		return err
@@ -540,7 +540,7 @@ func (e *ETCD) removePeer(ctx context.Context, id, address string) error {
 				return err
 			}
 			if u.Hostname() == address {
-				if e.address == address {
+				if e.address == address && !removeSelf {
 					return errors.New("node has been deleted from the cluster")
 				}
 				logrus.Infof("Removing name=%s id=%d address=%s from etcd", member.Name, member.ID, address)
@@ -687,7 +687,7 @@ func (e *ETCD) setLearnerProgress(ctx context.Context, status *learnerProgress)
 }
 
 // clientURLs returns a list of all non-learner etcd cluster member client access URLs
-func ClientURLs(ctx context.Context, clientAccessInfo *clientaccess.Info) ([]string, Members, error) {
+func ClientURLs(ctx context.Context, clientAccessInfo *clientaccess.Info, selfIP string) ([]string, Members, error) {
 	var memberList Members
 	resp, err := clientaccess.Get("/db/info", clientAccessInfo)
 	if err != nil {
@@ -697,13 +697,22 @@ func ClientURLs(ctx context.Context, clientAccessInfo *clientaccess.Info) ([]str
 	if err := json.Unmarshal(resp, &memberList); err != nil {
 		return nil, memberList, err
 	}
-
+	ip, err := GetAdvertiseAddress(selfIP)
+	if err != nil {
+		return nil, memberList, err
+	}
 	var clientURLs []string
+members:
 	for _, member := range memberList.Members {
 		// excluding learner member from the client list
 		if member.IsLearner {
 			continue
 		}
+		for _, url := range member.ClientURLs {
+			if strings.Contains(url, ip) {
+				continue members
+			}
+		}
 		clientURLs = append(clientURLs, member.ClientURLs...)
 	}
 	return clientURLs, memberList, nil
@@ -941,3 +950,8 @@ func (e *ETCD) GetMembersClientURLs(ctx context.Context) ([]string, error) {
 	}
 	return memberUrls, nil
 }
+
+// RemoveSelf will remove the member if it exists in the cluster
+func (e *ETCD) RemoveSelf(ctx context.Context) error {
+	return e.removePeer(ctx, e.name, e.address, true)
+}

vendor/github.com/rancher/dynamiclistener/storage/memory/memory.go

@@ -32,7 +32,7 @@ func (m *memory) Get() (*v1.Secret, error) {
 }
 
 func (m *memory) Update(secret *v1.Secret) error {
-	if m.secret == nil || m.secret.ResourceVersion != secret.ResourceVersion {
+	if m.secret == nil || m.secret.ResourceVersion == "" || m.secret.ResourceVersion != secret.ResourceVersion {
 		if m.storage != nil {
 			if err := m.storage.Update(secret); err != nil {
 				return err

vendor/modules.txt

@@ -842,7 +842,7 @@ github.com/prometheus/procfs/internal/util
 # github.com/rakelkar/gonetsh v0.0.0-20190930180311-e5c5ffe4bdf0
 github.com/rakelkar/gonetsh/netroute
 github.com/rakelkar/gonetsh/netsh
-# github.com/rancher/dynamiclistener v0.2.1
+# github.com/rancher/dynamiclistener v0.2.2
 ## explicit
 github.com/rancher/dynamiclistener
 github.com/rancher/dynamiclistener/cert