func getHosts() []string {
hostsConfigPath := []string{"hailo", "service", "zookeeper", "hosts"}
tier := config.AtPath("hailo", "service", "zookeeper", "tier").AsString("general")
if tier != "general" {
hostsConfigPath = append(hostsConfigPath, tier)
}
if hosts := config.AtPath(hostsConfigPath...).AsHostnameArray(2181); len(hosts) > 0 {
return hosts
}
// no hosts returned so try dns
hosts, err := dns.Hosts("zookeeper-" + tier)
if err != nil {
log.Errorf("Failed to load ZK hosts from dns: %v", err)
return []string{"localhost:2181"}
}
// for safety fall back to localhost
if len(hosts) == 0 {
return []string{"localhost:2181"}
}
// append port
for i, host := range hosts {
hosts[i] = host + ":2181"
}
return hosts
}
func getHosts() []string {
hostConfigPath := []string{"hailo", "service", "memcache", "servers"}
host := "memcached"
// check if tier is specified and act accordingly
tier := config.AtPath("hailo", "service", "memcache", "tier").AsString("")
if tier != "" {
hostConfigPath = append(hostConfigPath, tier)
host = fmt.Sprintf("%s-%s", host, tier)
}
if hosts := config.AtPath(hostConfigPath...).AsHostnameArray(11211); len(hosts) > 0 {
return hosts
}
// no hosts returned so try dns
hosts, err := dns.Hosts(host)
if err != nil {
log.Errorf("[Memcache] Failed to load hosts from dns, returning empty list: %v", err)
return []string{}
}
// append port
for i, host := range hosts {
hosts[i] = host + ":11211"
}
return hosts
}
func getHosts(port int, path ...string) []string {
if hosts := config.AtPath(path...).AsHostnameArray(port); len(hosts) > 0 {
return hosts
}
// should we lookup dns?
if config.AtPath("hailo", "service", "nsq", "disableDnsLookup").AsBool() {
return []string{}
}
// try dns lookup
cluster := config.AtPath("hailo", "service", "nsq", "cluster").AsString("general")
hosts, err := dns.Hosts("nsq-" + cluster)
if err != nil {
log.Errorf("Failed to load NSQ hosts from dns: %v", err)
return []string{}
}
// append port
for i, host := range hosts {
hosts[i] = fmt.Sprintf("%s:%d", host, port)
}
return hosts
}
func getHosts() []string {
port := config.AtPath("hailo", "service", "cassandra", "defaults", "cqlPort").AsInt(defaultPort)
hosts := config.AtPath("hailo", "service", "cassandra", hostsCfgKey()).AsHostnameArray(port)
if len(hosts) > 0 {
return hosts
}
// No hosts returned: try DNS
tier := config.AtPath("hailo", "service", "cassandra", "tier").AsString("premium")
hosts, err := dns.Hosts("cassandra-" + tier)
if err != nil {
log.Errorf("[Cassandra] Failed to load hosts from DNS: %s", err.Error())
return defaultHosts
}
if len(hosts) == 0 {
return defaultHosts
}
// We need to append the port to hosts coming from DNS
for i, host := range hosts {
hosts[i] = host + fmt.Sprintf(":%d", port)
}
return hosts
}
func getHosts() []string {
cassandraHostKey := getCassandraHostConfigKey()
config.WaitUntilLoaded(5 * time.Second)
port := config.AtPath("hailo", "service", "cassandra", "defaults", "thriftPort").AsInt(defaultPort)
if hosts := config.AtPath("hailo", "service", "cassandra", cassandraHostKey).AsHostnameArray(port); len(hosts) > 0 {
return hosts
}
// No hosts returned: try DNS
tier := config.AtPath("hailo", "service", "cassandra", "tier").AsString("premium")
hosts, err := dns.Hosts("cassandra-" + tier)
if err != nil {
log.Errorf("Failed to load Cassandra hosts from dns: %v", err)
return defaultHosts
}
if len(hosts) == 0 {
return defaultHosts
}
// We need to append the port to hosts coming from DNS
for i, host := range hosts {
hosts[i] = host + fmt.Sprintf(":%d", port)
}
return hosts
}