private static async Task <(bool, long)> ElectLeader(string serverName)
{
Console.WriteLine("Electing a leader.");
var leaseResponse = await EtcdClient.LeaseGrantAsync(new LeaseGrantRequest
{
TTL = Ttl
});
var put = await TryPut(LeaderKey, serverName, leaseResponse.ID);
return(put, leaseResponse.ID);
}
public async Task ImHere()
{
var leaseGrantRequest = new LeaseGrantRequest
{
TTL = LeaseTtl
};
var leaseGrantResponse = await _client.LeaseGrantAsync(leaseGrantRequest);
_leaseId = leaseGrantResponse.ID;
await _client.PutAsync(new PutRequest
{
Lease = leaseGrantResponse.ID,
Key = _key,
Value = _broker
});
_timer = new Timer(LeaseKeepAlive, null, TimeSpan.Zero, TimeSpan.FromSeconds(5));
}
/// <summary>
/// 系统配置注册
/// </summary>
/// <param name="client">客户端</param>
/// <param name="sysName">系统名称</param>
/// <param name="registration">配置信息</param>
/// <returns></returns>
private static async Task AddConfigAsync(EtcdClient client, string sysName, AgentServiceRegistration registration)
{
string key = "/" + sysName + "/config";
string timeKey = "/" + sysName + "/Time/" + registration.Name + "/" + registration.ID;
var leasersp = await client.LeaseGrantAsync(new LeaseGrantRequest()
{
ID = 0, TTL = 10
});
var lockrsp = await client.LockAsync(new V3Lockpb.LockRequest()
{
Lease = leasersp.ID, Name = (key + "1").ToGoogleString()
});
var rsp = await client.GetAsync(key);
EtcdConfig config = new EtcdConfig();
if (rsp.Kvs.Count == 0)
{
var lst = new List <AgentServiceRegistration>
{
registration
};
config.Services = lst;
}
else
{
var val = JsonConvert.DeserializeObject <EtcdConfig>(rsp.Kvs[0].Value.FromGoogleString());
List <AgentServiceRegistration> lst = new List <AgentServiceRegistration>(val.Services);
lst.Add(registration);
config.Services = lst;
}
string cof = JsonConvert.SerializeObject(config);
await client.PutAsync(key, cof);
await client.PutAsync(timeKey, DateTime.Now.ToString("yyyy-MM-dd mm:HH:ss"));
await client.UnlockAsync(key + "1");
}
/// <summary>
/// 注册服务
/// </summary>
/// <param name="client">客户端</param>
/// <param name="systemName">系统名称(默认：Agent)</param>
/// <param name="registration">注册信息</param>
/// <returns></returns>
public static async Task <bool> RegisterAsync(this EtcdClient client, AgentServiceRegistration registration, string systemName = "Agent")
{
try
{
// /系统/Services/srvname/srvid
ServiceEntry entry = new ServiceEntry()
{
Host = registration.Address,
Port = registration.Port,
Name = registration.Name,
Id = registration.ID,
Tags = registration.Tags,
Version = registration.Version
};
if (registration.Checks == null || registration.Checks.Length == 0)
{
registration.Checks = new AgentServiceCheck[1];
registration.Checks[0] = new AgentServiceCheck();
registration.Checks[0].Interval = new TimeSpan(0, 0, 5);
}
var val = JsonConvert.SerializeObject(entry);
string key = "/" + systemName + "/Services/" + entry.Name + "/" + entry.Id;
CancellationToken token = new CancellationToken();
if (!string.IsNullOrEmpty(Utiletcd.Sinlgeton.Password) || !string.IsNullOrEmpty(Utiletcd.Sinlgeton.Username))
{
await client.AuthenticateAsync(new AuthenticateRequest()
{
Name = Utiletcd.Sinlgeton.Username,
Password = Utiletcd.Sinlgeton.Password
});
}
//申请TTL的ID
var lease = await client.LeaseGrantAsync(new LeaseGrantRequest()
{
ID = 0, TTL = (long)registration.Checks[0].Interval.TotalSeconds
});
//加入节点
var rsp = await client.PutAsync(new PutRequest()
{
Key = key.ToGoogleString(), Value = val.ToGoogleString(), Lease = lease.ID
});
//保持激活
await client.LeaseKeepAlive(new LeaseKeepAliveRequest()
{
ID = lease.ID
}, Watch, token);
//添加配置
await AddConfigAsync(client, systemName, registration);
//服务加入更新列表
await Utiletcd.Sinlgeton.AddKeepAliveAsync(client, key, (long)registration.Checks[0].Interval.TotalSeconds, lease.ID);
Init(client, key);
return(true);
}catch (Exception ex)
{
return(false);
}
}