public async Task falls_back_to_first_alive_node_if_a_preferred_node_is_not_found(bool useHttps)
{
var gossip = new ClusterMessages.ClusterInfo {
Members = new[] {
new ClusterMessages.MemberInfo {
State = ClusterMessages.VNodeState.Leader,
InstanceId = Guid.NewGuid(),
EndPoint = new DnsEndPoint(IPAddress.Any.ToString(), 1111),
IsAlive = false,
},
new ClusterMessages.MemberInfo {
State = ClusterMessages.VNodeState.Follower,
InstanceId = Guid.NewGuid(),
EndPoint = new DnsEndPoint(IPAddress.Any.ToString(), 2222),
IsAlive = true,
},
}
};
var sut = new GossipBasedEndpointDiscoverer(
new EventStoreClientConnectivitySettings {
MaxDiscoverAttempts = 1,
GossipTimeout = System.Threading.Timeout.InfiniteTimeSpan,
Insecure = !useHttps,
DiscoveryInterval = TimeSpan.Zero,
NodePreference = NodePreference.Leader,
DnsGossipSeeds = new[] { _gossipSeed }
}, new CallbackTestGossipClient(gossip));
var result = await sut.DiscoverAsync();
Assert.Equal(result.GetPort(),
gossip.Members.Last(x => x.State == ClusterMessages.VNodeState.Follower).EndPoint.Port);
}
public async Task should_issue_gossip_to_gossip_seed(bool useHttps)
{
var endPoint = new DnsEndPoint(IPAddress.Any.ToString(), 4444);
var gossip = new ClusterMessages.ClusterInfo {
Members = new[] {
new ClusterMessages.MemberInfo {
State = ClusterMessages.VNodeState.Leader,
InstanceId = Guid.NewGuid(),
EndPoint = endPoint,
IsAlive = true,
},
}
};
var sut = new GossipBasedEndpointDiscoverer(
new EventStoreClientConnectivitySettings {
MaxDiscoverAttempts = 1,
GossipTimeout = System.Threading.Timeout.InfiniteTimeSpan,
Insecure = !useHttps,
DiscoveryInterval = TimeSpan.Zero,
NodePreference = NodePreference.Leader,
DnsGossipSeeds = new[] { _gossipSeed }
}, new CallbackTestGossipClient(gossip));
var result = await sut.DiscoverAsync();
Assert.Equal(result, endPoint);
}
internal async Task should_not_be_able_to_pick_invalid_node(bool useHttps,
ClusterMessages.VNodeState invalidState)
{
var gossip = new ClusterMessages.ClusterInfo {
Members = new[] {
new ClusterMessages.MemberInfo {
State = invalidState,
InstanceId = Guid.NewGuid(), EndPoint = new DnsEndPoint(IPAddress.Any.ToString(), 4444),
IsAlive = true,
},
}
};
var sut = new GossipBasedEndpointDiscoverer(
new EventStoreClientConnectivitySettings {
MaxDiscoverAttempts = 1,
GossipTimeout = System.Threading.Timeout.InfiniteTimeSpan,
Insecure = !useHttps,
DiscoveryInterval = TimeSpan.Zero,
NodePreference = NodePreference.Leader,
DnsGossipSeeds = new[] { _gossipSeed }
}, new CallbackTestGossipClient(gossip));
var ex = await Assert.ThrowsAsync <DiscoveryException>(async() => await sut.DiscoverAsync());
Assert.Equal(1, ex.MaxDiscoverAttempts);
}
public async Task should_be_able_to_discover_twice(bool useHttps)
{
var firstGossip = new ClusterMessages.ClusterInfo {
Members = new[] {
new ClusterMessages.MemberInfo {
State = ClusterMessages.VNodeState.Leader,
InstanceId = Guid.NewGuid(), EndPoint = new DnsEndPoint(IPAddress.Any.ToString(), 1111),
IsAlive = true,
},
new ClusterMessages.MemberInfo {
State = ClusterMessages.VNodeState.Follower,
InstanceId = Guid.NewGuid(), EndPoint = new DnsEndPoint(IPAddress.Any.ToString(), 2222),
IsAlive = true,
},
}
};
var secondGossip = new ClusterMessages.ClusterInfo {
Members = new[] {
new ClusterMessages.MemberInfo {
State = ClusterMessages.VNodeState.Leader,
InstanceId = Guid.NewGuid(), EndPoint = new DnsEndPoint(IPAddress.Any.ToString(), 1111),
IsAlive = false,
},
new ClusterMessages.MemberInfo {
State = ClusterMessages.VNodeState.Leader,
InstanceId = Guid.NewGuid(), EndPoint = new DnsEndPoint(IPAddress.Any.ToString(), 2222),
IsAlive = true,
},
}
};
var sut = new GossipBasedEndpointDiscoverer(
new EventStoreClientConnectivitySettings {
MaxDiscoverAttempts = 5,
GossipTimeout = System.Threading.Timeout.InfiniteTimeSpan,
Insecure = !useHttps,
DiscoveryInterval = TimeSpan.Zero,
NodePreference = NodePreference.Leader,
DnsGossipSeeds = new[] { _gossipSeed }
}, new MultiGossipCallback(firstGossip, secondGossip));
var result = await sut.DiscoverAsync();
var expected = firstGossip.Members.First(x => x.EndPoint.Port == 1111);
Assert.Equal(expected.EndPoint.Host, result.GetHost());
Assert.Equal(expected.EndPoint.Port, result.GetPort());
result = await sut.DiscoverAsync();
expected = secondGossip.Members.First(x => x.EndPoint.Port == 2222);
Assert.Equal(expected.EndPoint.Host, result.GetHost());
Assert.Equal(expected.EndPoint.Port, result.GetPort());
}
internal async Task should_pick_node_based_on_preference(bool useHttps, NodePreference preference,
ClusterMessages.VNodeState expectedState)
{
var gossip = new ClusterMessages.ClusterInfo {
Members = new[] {
new ClusterMessages.MemberInfo {
State = ClusterMessages.VNodeState.Leader,
InstanceId = Guid.NewGuid(), EndPoint = new DnsEndPoint(IPAddress.Any.ToString(), 1111),
IsAlive = true,
},
new ClusterMessages.MemberInfo {
State = ClusterMessages.VNodeState.Follower,
InstanceId = Guid.NewGuid(), EndPoint = new DnsEndPoint(IPAddress.Any.ToString(), 2222),
IsAlive = true,
},
new ClusterMessages.MemberInfo {
State = expectedState == ClusterMessages.VNodeState.ReadOnlyLeaderless
? expectedState
: ClusterMessages.VNodeState.ReadOnlyReplica,
InstanceId = Guid.NewGuid(), EndPoint = new DnsEndPoint(IPAddress.Any.ToString(), 3333),
IsAlive = true,
},
new ClusterMessages.MemberInfo {
State = ClusterMessages.VNodeState.Manager,
InstanceId = Guid.NewGuid(), EndPoint = new DnsEndPoint(IPAddress.Any.ToString(), 4444),
IsAlive = true,
},
}
};
var sut = new GossipBasedEndpointDiscoverer(
new EventStoreClientConnectivitySettings {
MaxDiscoverAttempts = 1,
GossipTimeout = System.Threading.Timeout.InfiniteTimeSpan,
Insecure = !useHttps,
DiscoveryInterval = TimeSpan.Zero,
NodePreference = preference,
DnsGossipSeeds = new[] { _gossipSeed }
}, new CallbackTestGossipClient(gossip));
var result = await sut.DiscoverAsync();
Assert.Equal(result.GetPort(),
gossip.Members.Last(x => x.State == expectedState).EndPoint.Port);
}