// NewAddresses fetches EC2 IP address list from each region.
//
// If log is nil, defaultLogger is used instead.
func NewAddresses(clients *amazon.Clients, log logging.Logger) *Addresses {
if log == nil {
log = defaultLogger
}
a := newAddresses()
var wg sync.WaitGroup
var mu sync.Mutex // protects a.m
for region, client := range clients.Regions() {
wg.Add(1)
go func(region string, client *amazon.Client) {
defer wg.Done()
addresses, err := client.Addresses()
if err != nil {
log.Error("[%s] fetching IP addresses error: %s", region, err)
return
}
log.Info("[%s] fetched %d addresses", region, len(addresses))
var ok bool
mu.Lock()
if _, ok = a.m[client]; !ok {
a.m[client] = addresses
}
mu.Unlock()
if ok {
panic(fmt.Errorf("[%s] duplicated client=%p: %+v", region, client, addresses))
}
}(region, client)
}
wg.Wait()
return a
}
// NewMultiInstances fetches EC2 instance list from each region.
func NewMultiInstances(clients *amazon.Clients, log logging.Logger) *MultiInstances {
if log == nil {
log = defaultLogger
}
var m = newMultiInstances()
var wg sync.WaitGroup
var mu sync.Mutex // protects m.m
for region, client := range clients.Regions() {
wg.Add(1)
go func(region string, client *amazon.Client) {
defer wg.Done()
instances, err := client.Instances()
if err != nil {
log.Error("[%s] fetching instances error: %s", region, err)
return
}
log.Info("[%s] fetched %d instances", region, len(instances))
i := make(Instances, len(instances))
for _, instance := range instances {
i[aws.StringValue(instance.InstanceId)] = instance
}
var ok bool
mu.Lock()
if _, ok = m.m[client]; !ok {
m.m[client] = i
}
mu.Unlock()
if ok {
panic(fmt.Errorf("[%s] duplicated client=%p: %+v", region, client, i))
}
}(region, client)
}
wg.Wait()
return m
}