mirror of https://github.com/status-im/consul.git
101 lines
2.5 KiB
Go
101 lines
2.5 KiB
Go
package agent
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import (
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"fmt"
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"strings"
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"time"
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discover "github.com/hashicorp/go-discover"
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// support retry-join only for the following providers
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// to add more providers import additional packages or 'all'
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// to support all providers of go-discover
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_ "github.com/hashicorp/go-discover/provider/aws"
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_ "github.com/hashicorp/go-discover/provider/azure"
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_ "github.com/hashicorp/go-discover/provider/gce"
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)
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// RetryJoin is used to handle retrying a join until it succeeds or all
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// retries are exhausted.
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func (a *Agent) retryJoin() {
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cfg := a.config
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if len(cfg.RetryJoin) == 0 {
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return
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}
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a.logger.Printf("[INFO] agent: Supporting retry join for %v", discover.ProviderNames())
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a.logger.Printf("[INFO] agent: Joining cluster...")
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attempt := 0
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for {
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var addrs []string
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var err error
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for _, addr := range cfg.RetryJoin {
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switch {
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case strings.Contains(addr, "provider="):
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servers, err := discover.Addrs(addr, a.logger)
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if err != nil {
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a.logger.Printf("[ERR] agent: %s", err)
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} else {
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addrs = append(addrs, servers...)
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a.logger.Printf("[INFO] agent: Discovered servers: %s", strings.Join(servers, " "))
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}
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default:
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addrs = append(addrs, addr)
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}
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}
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if len(addrs) > 0 {
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n, err := a.JoinLAN(addrs)
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if err == nil {
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a.logger.Printf("[INFO] agent: Join completed. Synced with %d initial agents", n)
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return
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}
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}
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if len(addrs) == 0 {
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err = fmt.Errorf("No servers to join")
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}
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attempt++
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if cfg.RetryMaxAttempts > 0 && attempt > cfg.RetryMaxAttempts {
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a.retryJoinCh <- fmt.Errorf("agent: max join retry exhausted, exiting")
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return
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}
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a.logger.Printf("[WARN] agent: Join failed: %v, retrying in %v", err, cfg.RetryInterval)
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time.Sleep(cfg.RetryInterval)
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}
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}
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// RetryJoinWan is used to handle retrying a join -wan until it succeeds or all
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// retries are exhausted.
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func (a *Agent) retryJoinWan() {
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cfg := a.config
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if len(cfg.RetryJoinWan) == 0 {
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return
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}
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a.logger.Printf("[INFO] agent: Joining WAN cluster...")
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attempt := 0
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for {
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n, err := a.JoinWAN(cfg.RetryJoinWan)
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if err == nil {
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a.logger.Printf("[INFO] agent: Join -wan completed. Synced with %d initial agents", n)
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return
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}
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attempt++
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if cfg.RetryMaxAttemptsWan > 0 && attempt > cfg.RetryMaxAttemptsWan {
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a.retryJoinCh <- fmt.Errorf("agent: max join -wan retry exhausted, exiting")
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return
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}
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a.logger.Printf("[WARN] agent: Join -wan failed: %v, retrying in %v", err, cfg.RetryIntervalWan)
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time.Sleep(cfg.RetryIntervalWan)
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}
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}
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