func (event *Event) MustPublish(pub *zmqpubsub.Publisher) {
data, err := json.Marshal(event)
if err != nil {
log.Fatal(err)
}
pub.MustPublish("event."+event.Type, string(data))
}
func LoadConfig() {
var err error
c, err = NewConfig("applog_endpoint", Config{})
if err != nil {
log.Fatal("Unable to load applog_endpoint config; %v", err)
}
}
func Stream() chan *Event {
ch := make(chan *Event)
res := getDockerEvents(3)
go func() {
defer res.Body.Close()
// Read the streaming json from the events endpoint
// http://docs.docker.io/en/latest/api/docker_remote_api_v1.3/#monitor-docker-s-events
d := json.NewDecoder(res.Body)
for {
var event Event
if err := d.Decode(&event); err != nil {
if err == io.EOF {
break
}
log.Fatal(err)
}
ch <- &event
}
close(ch)
}()
return ch
}
func main() {
config.LoadConfig()
drain.RemoveOrphanedDrains()
applog_endpoint.RouterMain()
err := applog_endpoint.Serve()
log.Fatal(err)
}
func (m *MultiRegexpMatcher) MustAdd(name string, substring string, re string) {
if oldName, ok := m.substrings[substring]; ok {
log.Fatalf(
"substring %s already added under %s; being added again by %s",
substring, oldName, name)
}
if _, ok := m.regexps[name]; ok {
log.Fatal("already in regexps")
}
m.substrings[substring] = name
m.regexps[name] = regexp.MustCompile(re)
}
func (t *tracker) Remove(key string) {
if t.debug {
log.Infof("Removing the following key %s from cached instances", key)
}
t.mux.Lock()
delete(t.Cached.Instances, key)
t.mux.Unlock()
if err := t.Commit(); err != nil {
log.Fatal(err)
}
}
func GetLiveDockerContainers(retries int) map[string]bool {
allDockerIds := make(map[string]bool)
var httpResByte []byte
c := http.Client{}
for attempt := 0; attempt < retries; attempt++ {
res, err := c.Get(containers_url)
defer res.Body.Close()
if err != nil {
if (attempt + 1) == retries {
log.Fatalf("Failed to read from docker daemon; giving up retrying: %v", err)
}
log.Warnf("Docker connection error (%v); retrying after 1 second.", err)
time.Sleep(time.Second)
} else {
httpResByte, err = ioutil.ReadAll(res.Body)
if err != nil {
log.Fatal(err)
}
var jsonData []Docker
err = json.Unmarshal([]byte(httpResByte), &jsonData)
if err != nil {
log.Fatal(err)
}
for _, element := range jsonData {
shortenedKey := element.Id[:ID_LENGTH]
allDockerIds[shortenedKey] = true
}
}
}
return allDockerIds
}
func (t *tracker) StartSubmissionTimer(persistInterval time.Duration) {
ticker := time.NewTicker(persistInterval)
go func() {
for {
select {
case <-ticker.C:
err := t.Commit()
if err != nil {
log.Fatal(err)
}
case <-t.timerStopChan:
ticker.Stop()
return
}
}
}()
}
// GetState retrieves the cached state for the given process on all
// nodes.
func (s *StateCache) GetState(name string) (map[string]StateInfo, error) {
allKey, _ := s.getKeys(name)
states := map[string]StateInfo{}
reply := s.Client.SMembers(allKey)
if err := reply.Err(); err != nil {
return nil, err
}
for _, nodeip := range reply.Val() {
reply2 := s.Client.Get(s.getKeyFor(name, nodeip))
if err := reply2.Err(); err != nil {
return nil, err
}
stateInfoJson := reply2.Val()
var stateInfo StateInfo
if err := json.Unmarshal([]byte(stateInfoJson), &stateInfo); err != nil {
log.Fatal(err)
}
states[nodeip] = stateInfo
}
return states, nil
}
// SetState caches the given state of a process in redis.
func (s *StateCache) SetState(
name string, state state.State, rev int64) {
info := StateInfo(state.Info())
info["rev"] = fmt.Sprintf("%d", rev)
data, err := json.Marshal(info)
if err != nil {
log.Fatal(err)
}
allKey, thisKey := s.getKeys(name)
log.Infof("[statecache] Caching state of %s", name)
reply := s.Client.SAdd(allKey, s.Host)
if err := reply.Err(); err != nil {
log.Errorf("Unable to cache state of %s in redis; %v",
name, err)
return
}
reply2 := s.Client.Set(thisKey, string(data))
if err := reply2.Err(); err != nil {
log.Errorf("Unable to cache state of %s in redis; %v",
name, err)
}
}