Golang discovery.SRVGetCluster函數代碼示例

// getPeerURLsMapAndToken sets up an initial peer URLsMap and cluster token for bootstrap or discovery.
func getPeerURLsMapAndToken(cfg *config, which string) (urlsmap types.URLsMap, token string, err error) {
	switch {
	case cfg.durl != "":
		urlsmap = types.URLsMap{}
		// If using discovery, generate a temporary cluster based on
		// self's advertised peer URLs
		urlsmap[cfg.name] = cfg.apurls
		token = cfg.durl
	case cfg.dnsCluster != "":
		var clusterStr string
		clusterStr, token, err = discovery.SRVGetCluster(cfg.name, cfg.dnsCluster, cfg.initialClusterToken, cfg.apurls)
		if err != nil {
			return nil, "", err
		}
		urlsmap, err = types.NewURLsMap(clusterStr)
		// only etcd member must belong to the discovered cluster.
		// proxy does not need to belong to the discovered cluster.
		if which == "etcd" {
			if _, ok := urlsmap[cfg.name]; !ok {
				return nil, "", fmt.Errorf("cannot find local etcd member %q in SRV records", cfg.name)
			}
		}
	default:
		// We're statically configured, and cluster has appropriately been set.
		urlsmap, err = types.NewURLsMap(cfg.initialCluster)
		token = cfg.initialClusterToken
	}
	return urlsmap, token, err
}

// PeerURLsMapAndToken sets up an initial peer URLsMap and cluster token for bootstrap or discovery.
func (cfg *Config) PeerURLsMapAndToken(which string) (urlsmap types.URLsMap, token string, err error) {
	switch {
	case cfg.Durl != "":
		urlsmap = types.URLsMap{}
		// If using discovery, generate a temporary cluster based on
		// self's advertised peer URLs
		urlsmap[cfg.Name] = cfg.APUrls
		token = cfg.Durl
	case cfg.DNSCluster != "":
		var clusterStr string
		clusterStr, token, err = discovery.SRVGetCluster(cfg.Name, cfg.DNSCluster, cfg.InitialClusterToken, cfg.APUrls)
		if err != nil {
			return nil, "", err
		}
		if strings.Contains(clusterStr, "https://") && cfg.PeerTLSInfo.CAFile == "" {
			cfg.PeerTLSInfo.ServerName = cfg.DNSCluster
		}
		urlsmap, err = types.NewURLsMap(clusterStr)
		// only etcd member must belong to the discovered cluster.
		// proxy does not need to belong to the discovered cluster.
		if which == "etcd" {
			if _, ok := urlsmap[cfg.Name]; !ok {
				return nil, "", fmt.Errorf("cannot find local etcd member %q in SRV records", cfg.Name)
			}
		}
	default:
		// We're statically configured, and cluster has appropriately been set.
		urlsmap, err = types.NewURLsMap(cfg.InitialCluster)
		token = cfg.InitialClusterToken
	}
	return urlsmap, token, err
}

// setupCluster sets up an initial cluster definition for bootstrap or discovery.
func setupCluster(cfg *config) (*etcdserver.Cluster, error) {
	var cls *etcdserver.Cluster
	var err error
	switch {
	case cfg.durl != "":
		// If using discovery, generate a temporary cluster based on
		// self's advertised peer URLs
		clusterStr := genClusterString(cfg.name, cfg.apurls)
		cls, err = etcdserver.NewClusterFromString(cfg.durl, clusterStr)
	case cfg.dnsCluster != "":
		clusterStr, clusterToken, err := discovery.SRVGetCluster(cfg.name, cfg.dnsCluster, cfg.initialClusterToken, cfg.apurls)
		if err != nil {
			return nil, err
		}
		cls, err = etcdserver.NewClusterFromString(clusterToken, clusterStr)
	default:
		// We're statically configured, and cluster has appropriately been set.
		cls, err = etcdserver.NewClusterFromString(cfg.initialClusterToken, cfg.initialCluster)
	}
	return cls, err
}

// getPeerURLsMapAndToken sets up an initial peer URLsMap and cluster token for bootstrap or discovery.
func getPeerURLsMapAndToken(cfg *config) (urlsmap types.URLsMap, token string, err error) {
	switch {
	case cfg.durl != "":
		urlsmap = types.URLsMap{}
		// If using discovery, generate a temporary cluster based on
		// self's advertised peer URLs
		urlsmap[cfg.name] = cfg.apurls
		token = cfg.durl
	case cfg.dnsCluster != "":
		var clusterStr string
		clusterStr, token, err = discovery.SRVGetCluster(cfg.name, cfg.dnsCluster, cfg.initialClusterToken, cfg.apurls)
		if err != nil {
			return nil, "", err
		}
		urlsmap, err = types.NewURLsMap(clusterStr)
	default:
		// We're statically configured, and cluster has appropriately been set.
		urlsmap, err = types.NewURLsMap(cfg.initialCluster)
		token = cfg.initialClusterToken
	}
	return urlsmap, token, err
}