func ws(at string, handler ApiWebsocketFunc) websocket.Handler {
return websocket.Handler(func(ws *websocket.Conn) {
log := logger.New("ns=kernel").At(at).Start()
if !passwordCheck(ws.Request()) {
ws.Write([]byte("ERROR: invalid authorization\n"))
return
}
if !versionCheck(ws.Request()) {
ws.Write([]byte("client outdated, please update with `convox update`\n"))
return
}
err := handler(ws)
if err != nil {
ws.Write([]byte(fmt.Sprintf("ERROR: %v\n", err)))
logError(log, err)
return
}
log.Log("state=success")
})
}
func api(at string, handler ApiHandlerFunc) http.HandlerFunc {
return func(rw http.ResponseWriter, r *http.Request) {
log := logger.New("ns=kernel").At(at).Start()
if !passwordCheck(r) {
rw.Header().Set("WWW-Authenticate", `Basic realm="Convox System"`)
rw.WriteHeader(401)
rw.Write([]byte("invalid authorization"))
return
}
if !versionCheck(r) {
rw.WriteHeader(403)
rw.Write([]byte("client outdated, please update with `convox update`"))
return
}
err := handler(rw, r)
if err != nil {
rw.WriteHeader(err.Code())
RenderError(rw, err)
logError(log, err)
return
}
log.Log("state=success")
}
}
func recovery(rw http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
defer recoverWith(func(err error) {
log := logger.New("ns=kernel").At("panic")
helpers.Error(log, err)
http.Error(rw, err.Error(), http.StatusInternalServerError)
})
next(rw, r)
}
func StartHeartbeat() {
log := logger.New("ns=heartbeat")
defer recoverWith(func(err error) {
helpers.Error(log, err)
})
helpers.TrackEvent("kernel-heartbeat", "")
for _ = range time.Tick(1 * time.Hour) {
helpers.TrackEvent("kernel-heartbeat", "")
}
}
func StartCluster() {
var log = logger.New("ns=cluster_monitor")
defer recoverWith(func(err error) {
helpers.Error(log, err)
})
Tick:
for _ = range time.Tick(5 * time.Minute) {
log.Log("tick")
// Ger Rack InstanceCount Parameter
instanceCount := 0
// instanceType := "unknown"
res, err := models.CloudFormation().DescribeStacks(
&cloudformation.DescribeStacksInput{
StackName: aws.String(os.Getenv("RACK")),
},
)
if err != nil {
log.Error(err)
continue
}
for _, p := range res.Stacks[0].Parameters {
if *p.ParameterKey == "InstanceCount" {
c, err := strconv.Atoi(*p.ParameterValue)
if err != nil {
log.Error(err)
break Tick
}
instanceCount = c
}
// if *p.ParameterKey == "InstanceType" {
// instanceType = *p.ParameterValue
// }
}
// helpers.SendMixpanelEvent("kernel-cluster-monitor", fmt.Sprintf("count=%d type=%s", instanceCount, instanceType))
// List and Describe ECS Container Instances
ires, err := models.ECS().ListContainerInstances(
&ecs.ListContainerInstancesInput{
Cluster: aws.String(os.Getenv("CLUSTER")),
},
)
if err != nil {
log.Error(err)
continue
}
dres, err := models.ECS().DescribeContainerInstances(
&ecs.DescribeContainerInstancesInput{
Cluster: aws.String(os.Getenv("CLUSTER")),
ContainerInstances: ires.ContainerInstanceArns,
},
)
if err != nil {
log.Error(err)
continue
}
cInstanceIds := make([]string, 0)
cInstanceConnections := make(map[string]bool)
for _, i := range dres.ContainerInstances {
cInstanceConnections[*i.Ec2InstanceId] = *i.AgentConnected
if *i.AgentConnected {
cInstanceIds = append(cInstanceIds, *i.Ec2InstanceId)
}
}
// Get and Describe Rack ASG Resource
resources, err := models.ListResources(os.Getenv("RACK"))
ares, err := models.AutoScaling().DescribeAutoScalingGroups(
&autoscaling.DescribeAutoScalingGroupsInput{
AutoScalingGroupNames: []*string{
aws.String(resources["Instances"].Id),
},
},
)
if err != nil {
log.Error(err)
continue
}
// Test if ASG Instance is registered and connected in ECS cluster
aInstanceIds := []string{}
uInstanceIds := []string{}
for _, i := range ares.AutoScalingGroups[0].Instances {
if connected, exists := cInstanceConnections[*i.InstanceId]; connected && exists {
aInstanceIds = append(aInstanceIds, *i.InstanceId)
} else {
// Not registered or not connected => set Unhealthy
if *i.LifecycleState == "InService" {
_, err := models.AutoScaling().SetInstanceHealth(
&autoscaling.SetInstanceHealthInput{
HealthStatus: aws.String("Unhealthy"),
InstanceId: aws.String(*i.InstanceId),
ShouldRespectGracePeriod: aws.Bool(true),
},
)
if err != nil {
log.Error(err)
continue
}
uInstanceIds = append(uInstanceIds, *i.InstanceId)
}
}
}
sort.Strings(aInstanceIds)
sort.Strings(cInstanceIds)
sort.Strings(uInstanceIds)
// if len(uInstanceIds) > 0 {
// helpers.SendMixpanelEvent("kernel-cluster-monitor-mark", strings.Join(uInstanceIds, ","))
// }
log.Log("InstanceCount=%v connected='%v' healthy='%v' marked='%s'", instanceCount, strings.Join(cInstanceIds, ","), strings.Join(aInstanceIds, ","), strings.Join(uInstanceIds, ","))
}
}