// matchesFilters applies the relevant filter groups to a filterable
func matchesFilters(filterable filters.Filterable) bool {
// recover from potential panics caused by malformed filters
defer func() {
if r := recover(); r != nil {
log.Error("Recovered in matchesFilters with panic: ", r)
}
}()
var groups map[string]filters.FilterGroup
switch filterable.(type) {
case *reaperaws.Instance:
groups = config.Instances.FilterGroups
case *reaperaws.AutoScalingGroup:
groups = config.AutoScalingGroups.FilterGroups
case *reaperaws.Cloudformation:
groups = config.Cloudformations.FilterGroups
case *reaperaws.SecurityGroup:
groups = config.SecurityGroups.FilterGroups
case *reaperaws.Volume:
groups = config.Volumes.FilterGroups
default:
log.Warning("You probably screwed up and need to make sure matchesFilters works!")
return false
}
matched := false
// if there are no filters groups defined default to not match
if len(groups) == 0 {
return false
}
shouldFilter := false
for _, group := range groups {
if len(group) > 0 {
// there is a filter
shouldFilter = true
}
}
// no filters, default to not match
if !shouldFilter {
return false
}
for name, group := range groups {
didMatch := filters.ApplyFilters(filterable, group)
if didMatch {
matched = true
filterable.AddFilterGroup(name, group)
}
}
// convenient
if isWhitelisted(filterable) {
matched = false
}
return matched
}
// newReapableEvent is a method of EventReporter
func (e *Tagger) newReapableEvent(r Reapable, tags []string) error {
if r.ReaperState().Until.IsZero() {
log.Warning("Uninitialized time value for %s!", r.ReapableDescription())
}
if e.Config.shouldTriggerFor(r) {
log.Info("Tagging %s with %s", r.ReapableDescriptionTiny(), r.ReaperState().State.String())
_, err := r.Save(r.ReaperState())
if err != nil {
return err
}
}
return nil
}
// cloudformationResources returns a chan of CloudformationResources, sourced from the AWS API
// there is rate limiting in the AWS API for CloudformationResources, so we delay
// this is skippable with the CLI flag -withoutCloudformationResources
func cloudformationResources(region, id string) chan *cloudformation.StackResource {
ch := make(chan *cloudformation.StackResource)
if config.WithoutCloudformationResources {
close(ch)
return ch
}
api := cloudformation.New(sess, aws.NewConfig().WithRegion(region))
go func() {
<-timeout
// this query can fail, so we retry
didRetry := false
input := &cloudformation.DescribeStackResourcesInput{StackName: &id}
// initial query
resp, err := api.DescribeStackResources(input)
for err != nil {
sleepTime := 2*time.Second + time.Duration(rand.Intn(2000))*time.Millisecond
if err != nil {
// this error is annoying and will come up all the time... so you can disable it
if strings.Split(err.Error(), ":")[0] == "Throttling" && log.Extras() {
log.Warning("StackResources: %s (retrying %s after %ds)", err.Error(), id, sleepTime*1.0/time.Second)
} else if strings.Split(err.Error(), ":")[0] != "Throttling" {
// any other errors
log.Error(fmt.Sprintf("StackResources: %s (retrying %s after %ds)", err.Error(), id, sleepTime*1.0/time.Second))
}
}
// wait a random amount of time... hopefully long enough to beat rate limiting
time.Sleep(sleepTime)
// retry query
resp, err = api.DescribeStackResources(input)
didRetry = true
}
if didRetry && log.Extras() {
log.Info("Retry succeeded for %s!", id)
}
for _, resource := range resp.StackResources {
ch <- resource
}
close(ch)
}()
return ch
}
func (e *EventReporterConfig) parseTriggers() (triggers []state.StateEnum) {
for _, t := range e.Triggers {
switch t {
case "first":
triggers = append(triggers, state.FirstState)
case "second":
triggers = append(triggers, state.SecondState)
case "third":
triggers = append(triggers, state.ThirdState)
case "final":
triggers = append(triggers, state.FinalState)
case "ignore":
triggers = append(triggers, state.IgnoreState)
default:
log.Warning("%s is not an available EventReporter trigger", t)
}
}
return
}
// Owner extracts useful information out of the Owner tag which should
// be parsable by mail.ParseAddress
func (a *Resource) Owner() *mail.Address {
// properly formatted email
if addr, err := mail.ParseAddress(a.Tag("Owner")); err == nil {
return addr
}
// username -> default email host email address
if addr, err := mail.ParseAddress(fmt.Sprintf("%s@%s", a.Tag("Owner"), config.DefaultEmailHost)); a.Tagged("Owner") && config.DefaultEmailHost != "" && err == nil {
return addr
}
// default owner is specified
if addr, err := mail.ParseAddress(
fmt.Sprintf("%s@%s", config.DefaultOwner, config.DefaultEmailHost)); config.DefaultOwner != "" && config.DefaultEmailHost != "" && err == nil {
return addr
}
log.Warning("No default owner or email host.")
return nil
}
