CheckID does not have associated TTL

Question

I'm trying to utilize Consul .NET API to register and fire health checks via TTL. First I'm registering my service with following code:

var address = node.Address;
var id = ServiceId(address);
var registration = new AgentServiceRegistration
{
    ID = id,
    Name = node.ClusterName,
    Address = node.Address.Host,
    Port = node.Address.Port.Value,
    Check = new AgentServiceCheck
    {
        TTL = settings.AliveInterval, // 10sec
        DeregisterCriticalServiceAfter = settings.AliveTimeout, // 60sec
    }
};    
// first, try to deregister service, if it has been registered previously
await consul.Agent.ServiceDeregister(registration.ID);
await consul.Agent.ServiceRegister(registration);

Right afterwards, I'm trying to fire a TTL via:

await consul.Agent.PassTTL("service:" + ServiceId(addr), string.Empty);

However, what I end up with is an exception thrown during PassTTL: Consul.ConsulRequestException: Unexpected response, status code InternalServerError: CheckID "service:{service-id}" does not have associated TTL

And the related log from consul agent itself:

[ERR] http: Request PUT /v1/agent/check/pass/service:{service-id}, error: CheckID "service:{service-id}" does not have associated TTL from=127.0.0.1:25419

I'd like to know what I'm doing wrong here.

I'm using consul agent -dev (version: 1.0.1) and Nuget package Consul (version: 0.7.2.3).

Answer 1

Turns out AgentServiceRegistration.Check property is pretty useless. I've achieved the expected result with CheckRegister method.

Here's the code

var registration = new AgentServiceRegistration
{
    ID = "serviceId",
    Name = node.ClusterName,
    Address = node.Address.Host,
    Port = node.Address.Port.Value
};    
// first, try to deregister service, if it has been registered previously
await consul.Agent.ServiceDeregister(registration.ID);
await consul.Agent.ServiceRegister(registration);
await consul.Agent.CheckRegister(new AgentCheckRegistration()
{
    ID = "checkId",
    Name = "Check Name",
    Status = HealthStatus.Passing,
    TTL = settings.AliveInterval,
    ServiceID = "serviceId",
    DeregisterCriticalServiceAfter = settings.AliveTimeout, // 60sec
})

Now you can pass TTL via

await consul.Agent.PassTTL("checkId", string.Empty);

Just be sure to deregister your check afterwards

Answer 2

It looks like my example was missing a crucial detail here: a ServiceId(address) method was constructing a service ID in form of protocol://service@host:port/ which resulted in Consul complaining about lack of TTL. Changing it to service@host:port seems to fix the error.

I guess in this case a consul error message was very misleading.

Answer 3

Check if id format is:

"service:{service id}:{number}"

In your case, you must pass:

"service:" + ServiceId(addr) + ":1"

as your check id.