func main() {
cfg := config.GetConfig(arg_config)
// Set up cache
var ac = cache.NewAgentCache(cfg)
ac.Init()
// Generate UUID
uuid := hostresources.GenerateUuid()
ac.SetKeyValue("uuid", uuid)
log.Infof("ToDD Agent Activated: %s", uuid)
// Start test data reporting service
go testing.WatchForFinishedTestRuns(cfg)
// Construct comms package
var tc = comms.NewToDDComms(cfg)
// Spawn goroutine to listen for tasks issued by server
go func() {
for {
err := tc.CommsPackage.ListenForTasks(uuid)
if err != nil {
log.Warn("ListenForTasks reported a failure. Trying again...")
}
}
}()
// Watch for changes to group membership
go tc.CommsPackage.WatchForGroup()
// Continually advertise agent status into message queue
for {
// Gather assets here as a map, and refer to a key in that map in the below struct
gatheredAssets := GetLocalAssets(cfg)
var defaultaddr string
if cfg.LocalResources.IPAddrOverride != "" {
defaultaddr = cfg.LocalResources.IPAddrOverride
} else {
defaultaddr = hostresources.GetIPOfInt(cfg.LocalResources.DefaultInterface).String()
}
// Create an AgentAdvert instance to represent this particular agent
me := defs.AgentAdvert{
Uuid: uuid,
DefaultAddr: defaultaddr,
FactCollectors: gatheredAssets["factcollectors"],
Testlets: gatheredAssets["testlets"],
Facts: facts.GetFacts(cfg),
LocalTime: time.Now().UTC(),
}
// Advertise this agent
err := tc.CommsPackage.AdvertiseAgent(me)
if err != nil {
log.Error("Failed to advertise agent after several retries")
}
time.Sleep(15 * time.Second) // TODO(moswalt): make configurable
}
}
// ListenForAgent will listen on the message queue for new agent advertisements.
// It is meant to be run as a goroutine
func (rmq rabbitMQComms) ListenForAgent(assets map[string]map[string]string) {
// TODO(mierdin): does func param need to be a pointer?
conn, err := amqp.Dial(rmq.queueUrl)
if err != nil {
log.Error(err)
log.Error("Failed to connect to RabbitMQ")
os.Exit(1)
}
defer conn.Close()
ch, err := conn.Channel()
if err != nil {
log.Error("Failed to open a channel")
os.Exit(1)
}
defer ch.Close()
q, err := ch.QueueDeclare(
"agentadvert", // name
false, // durable
false, // delete when unused
false, // exclusive
false, // no-wait
nil, // arguments
)
if err != nil {
log.Error("Failed to declare a queue")
os.Exit(1)
}
msgs, err := ch.Consume(
q.Name, // queue
"agentadvert", // consumer
true, // auto-ack
false, // exclusive
false, // no-local
false, // no-wait
nil, // args
)
if err != nil {
log.Error("Failed to register a consumer")
os.Exit(1)
}
forever := make(chan bool)
go func() {
for d := range msgs {
log.Debugf("Agent advertisement recieved: %s", d.Body)
var agent defs.AgentAdvert
err = json.Unmarshal(d.Body, &agent)
// TODO(mierdin): Need to handle this error
// assetList is a slice that will contain any URLs that need to be sent to an
// agent as a response to an incorrect or incomplete list of assets
var assetList []string
// assets is the asset map from the SERVER's perspective
for asset_type, asset_hashes := range assets {
var agentAssets map[string]string
// agentAssets is the asset map from the AGENT's perspective
if asset_type == "factcollectors" {
agentAssets = agent.FactCollectors
} else if asset_type == "testlets" {
agentAssets = agent.Testlets
}
for name, hash := range asset_hashes {
// See if the hashes match (a missing asset will also result in False)
if agentAssets[name] != hash {
// hashes do not match, so we need to append the asset download URL to the remediate list
var default_ip string
if rmq.config.LocalResources.IPAddrOverride != "" {
default_ip = rmq.config.LocalResources.IPAddrOverride
} else {
default_ip = hostresources.GetIPOfInt(rmq.config.LocalResources.DefaultInterface).String()
}
asset_url := fmt.Sprintf("http://%s:%s/%s/%s", default_ip, rmq.config.Assets.Port, asset_type, name)
assetList = append(assetList, asset_url)
}
}
}
// Asset list is empty, so we can continue
if len(assetList) == 0 {
var tdb, _ = db.NewToddDB(rmq.config)
tdb.SetAgent(agent)
// This block of code checked that the agent time was within a certain range of the server time. If there was a large enough
// time skew, the agent advertisement would be rejected.
// I have disabled this for now - My plan was to use this to synchronize testrun execution amongst agents, but I have
// a solution to that for now. May revisit this later.
//
// Determine difference between server and agent time
// t1 := time.Now()
// var diff float64
// diff = t1.Sub(agent.LocalTime).Seconds()
//
// // If Agent is within half a second of server time, add insert to database
// if diff < 0.5 && diff > -0.5 {
// } else {
// // We don't want to register an agent if there is a severe time difference,
// // in order to ensure continuity during tests. So, just print log message.
// log.Warn("Agent time not within boundaries.")
// }
} else {
log.Warnf("Agent %s did not have the required asset files. This advertisement is ignored.", agent.Uuid)
var task tasks.DownloadAssetTask
task.Type = "DownloadAsset" //TODO(mierdin): This is an extra step. Maybe a factory function for the task could help here?
task.Assets = assetList
rmq.SendTask(agent.Uuid, task)
}
}
}()
log.Infof(" [*] Waiting for messages. To exit press CTRL+C")
<-forever
}