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check etcd servers by a random order

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This commit is contained in:
hzxuzhonghu
2018-03-15 10:04:40 +08:00
parent 02611149c1
commit ea627f9875
1 changed files with 6 additions and 3 deletions
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9
staging/src/k8s.io/apiserver/pkg/storage/etcd3/preflight/checks.go
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@@ -18,6 +18,7 @@ package preflight
import (
"fmt"
"math/rand"
"net"
"net/url"
"time"
@@ -59,9 +60,11 @@ func parseServerURI(serverURI string) (*url.URL, error) {
// CheckEtcdServers will attempt to reach all etcd servers once. If any
// can be reached, return true.
func (con EtcdConnection) CheckEtcdServers() (done bool, err error) {
// Attempt to reach every Etcd server in order
for _, serverURI := range con.ServerList {
host, err := parseServerURI(serverURI)
// Attempt to reach every Etcd server randomly.
serverNumber := len(con.ServerList)
serverPerms := rand.Perm(serverNumber)
for _, index := range serverPerms {
host, err := parseServerURI(con.ServerList[index])
if err != nil {
return false, err
}