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Remove failed nodes from serfWAN (#6028) 

* Prune Servers from WAN and LAN

* cleaned up and fixed LAN to WAN

* moving things around

* force-leave remove from serfWAN, create pruneSerfWAN

* removed serfWAN remove, reduced complexity, fixed comments

* add another place to remove from serfWAN

* add nil check

* Update agent/consul/server.go

Co-Authored-By: Paul Banks <banks@banksco.de>
This commit is contained in:
Sarah Christoff 2019-06-28 12:40:07 -05:00 committed by GitHub
parent 7400ce2594
commit 8a930f7d3a
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
3 changed files with 29 additions and 10 deletions
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6
agent/consul/autopilot.go
View File

@ -77,6 +77,10 @@ func (d *AutopilotDelegate) Raft() *raft.Raft {
return d.server.raft
}
func (d *AutopilotDelegate) Serf() *serf.Serf {
func (d *AutopilotDelegate) SerfLAN() *serf.Serf {
return d.server.serfLAN
}
func (d *AutopilotDelegate) SerfWAN() *serf.Serf {
return d.server.serfWAN
}

27
agent/consul/autopilot/autopilot.go
View File

@ -22,7 +22,8 @@ type Delegate interface {
NotifyHealth(OperatorHealthReply)
PromoteNonVoters(*Config, OperatorHealthReply) ([]raft.Server, error)
Raft() *raft.Raft
Serf() *serf.Serf
SerfLAN() *serf.Serf
SerfWAN() *serf.Serf
}
// Autopilot is a mechanism for automatically managing the Raft
@ -182,7 +183,7 @@ func (a *Autopilot) pruneDeadServers() error {
// Failed servers are known to Serf and marked failed, and stale servers
// are known to Raft but not Serf.
var failed []string
var failed []serf.Member
staleRaftServers := make(map[string]raft.Server)
raftNode := a.delegate.Raft()
future := raftNode.GetConfiguration()
@ -194,8 +195,8 @@ func (a *Autopilot) pruneDeadServers() error {
for _, server := range raftConfig.Servers {
staleRaftServers[string(server.Address)] = server
}
serfLAN := a.delegate.Serf()
serfWAN := a.delegate.SerfWAN()
serfLAN := a.delegate.SerfLAN()
for _, member := range serfLAN.Members() {
server, err := a.delegate.IsServer(member)
if err != nil {
@ -214,8 +215,12 @@ func (a *Autopilot) pruneDeadServers() error {
if found && s.Suffrage == raft.Nonvoter {
a.logger.Printf("[INFO] autopilot: Attempting removal of failed server node %q", member.Name)
go serfLAN.RemoveFailedNode(member.Name)
if serfWAN != nil {
go serfWAN.RemoveFailedNode(member.Name)
}
} else {
failed = append(failed, member.Name)
failed = append(failed, member)
}
}
}
@ -231,8 +236,12 @@ func (a *Autopilot) pruneDeadServers() error {
peers := NumPeers(raftConfig)
if removalCount < peers/2 {
for _, node := range failed {
a.logger.Printf("[INFO] autopilot: Attempting removal of failed server node %q", node)
go serfLAN.RemoveFailedNode(node)
a.logger.Printf("[INFO] autopilot: Attempting removal of failed server node %q", node.Name)
go serfLAN.RemoveFailedNode(node.Name)
if serfWAN != nil {
go serfWAN.RemoveFailedNode(fmt.Sprintf("%s.%s", node.Name, node.Tags["dc"]))
}
}
minRaftProtocol, err := a.MinRaftProtocol()
@ -260,7 +269,7 @@ func (a *Autopilot) pruneDeadServers() error {
// MinRaftProtocol returns the lowest supported Raft protocol among alive servers
func (a *Autopilot) MinRaftProtocol() (int, error) {
return minRaftProtocol(a.delegate.Serf().Members(), a.delegate.IsServer)
return minRaftProtocol(a.delegate.SerfLAN().Members(), a.delegate.IsServer)
}
func minRaftProtocol(members []serf.Member, serverFunc func(serf.Member) (*ServerInfo, error)) (int, error) {
@ -369,7 +378,7 @@ func (a *Autopilot) updateClusterHealth() error {
// Get the the serf members which are Consul servers
var serverMembers []serf.Member
serverMap := make(map[string]*ServerInfo)
for _, member := range a.delegate.Serf().Members() {
for _, member := range a.delegate.SerfLAN().Members() {
if member.Status == serf.StatusLeft {
continue
}

6
agent/consul/server.go
View File

@ -13,6 +13,7 @@ import (
"path/filepath"
"reflect"
"strconv"
"strings"
"sync"
"sync/atomic"
"time"
@ -1003,6 +1004,11 @@ func (s *Server) RemoveFailedNode(node string) error {
if err := s.serfLAN.RemoveFailedNode(node); err != nil {
return err
}
// The Serf WAN pool stores members as node.datacenter
// so the dc is appended if not present
if !strings.HasSuffix(node, "."+s.config.Datacenter) {
node = node + "." + s.config.Datacenter
}
if s.serfWAN != nil {
if err := s.serfWAN.RemoveFailedNode(node); err != nil {
return err