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Rejoin join nodes automatically 

This adds a --rejoin setting for rejoining
cluter nodes automatically when gone.
This commit is contained in:
kaiyou 2020-05-21 17:51:21 +02:00
parent 62d9c44c11
commit da04afe24b
2 changed files with 10 additions and 0 deletions
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1
config.go
View File

@ -13,6 +13,7 @@ import (
type config struct { type config struct {
ClusterKey []byte `id:"cluster-key" desc:"shared key for cluster membership; must be 32 bytes base64 encoded; will be generated if not provided"` ClusterKey []byte `id:"cluster-key" desc:"shared key for cluster membership; must be 32 bytes base64 encoded; will be generated if not provided"`
Join []string `desc:"comma separated list of hostnames or IP addresses to existing cluster members; if not provided, will attempt resuming any known state or otherwise wait for further members."` Join []string `desc:"comma separated list of hostnames or IP addresses to existing cluster members; if not provided, will attempt resuming any known state or otherwise wait for further members."`
Rejoin int `desc:"interval at which join nodes are joined again if away, 0 disables rejoining altogether" default:"0"`
Init bool `desc:"whether to explicitly (re)initialize the cluster; any known state from previous runs will be forgotten"` Init bool `desc:"whether to explicitly (re)initialize the cluster; any known state from previous runs will be forgotten"`
BindAddr string `id:"bind-addr" desc:"IP address to bind to for cluster membership traffic (cannot be used with --bind-iface)"` BindAddr string `id:"bind-addr" desc:"IP address to bind to for cluster membership traffic (cannot be used with --bind-iface)"`
BindIface string `id:"bind-iface" desc:"Interface to bind to for cluster membership traffic (cannot be used with --bind-addr)"` BindIface string `id:"bind-iface" desc:"Interface to bind to for cluster membership traffic (cannot be used with --bind-addr)"`

9
main.go
View File

@ -50,6 +50,12 @@ func main() {
Logger: logrus.StandardLogger(), Logger: logrus.StandardLogger(),
} }
// Prepare the rejoin timer
rejoin := make(<-chan time.Time)
if config.Rejoin > 0 {
rejoin = time.Tick(time.Duration(1000000000 * config.Rejoin))
}
// Join the cluster // Join the cluster
cluster.Update(localNode) cluster.Update(localNode)
nodec := cluster.Members() // avoid deadlocks by starting before join nodec := cluster.Members() // avoid deadlocks by starting before join
@ -96,6 +102,9 @@ func main() {
logrus.Info("announcing new routes...") logrus.Info("announcing new routes...")
localNode.Routes = routes localNode.Routes = routes
cluster.Update(localNode) cluster.Update(localNode)
case <-rejoin:
logrus.Debug("rejoining missing join nodes...")
cluster.Join(config.Join)
case <-incomingSigs: case <-incomingSigs:
logrus.Info("terminating...") logrus.Info("terminating...")
cluster.Leave() cluster.Leave()