public void ShouldDownAllMembersWhenNotEnoughNodes()
{
string refereeAddress = "akka.tcp://system@localhost:33333";
var referee = TestUtils.CreateMember(MemberStatus.Up, Address.Parse(refereeAddress));
var members =
TestUtils.CreateMembers(MemberStatus.Up)
.Take(4)
.Concat(new List <Member> {
referee
})
.ToImmutableSortedSet();
var unreachable =
members.Where(m => m != referee)
.Take(2)
.ToImmutableHashSet();
var state = new CurrentClusterState().Copy(members, unreachable);
var strategy = new KeepRefereeDowningStrategy(refereeAddress, downAllIfLessThanNodes: 4);
var victims = strategy.GetVictims(state);
victims.ToImmutableHashSet().SetEquals(members)
.Should().BeTrue("We have 3 available members, which is less than downAllIfLessThanNodes 4, so down all members");
}
public void ShouldDownMembersInPartitionsWithoutReferee()
{
string refereeAddress = "akka.tcp://system@localhost:33333";
var referee = TestUtils.CreateMember(MemberStatus.Up, Address.Parse(refereeAddress));
var members =
TestUtils.CreateMembers(MemberStatus.Up)
.Take(4)
.Concat(new List <Member> {
referee
})
.ToImmutableSortedSet();
var unreachable =
members.Where(m => m != referee)
.Take(2)
.Concat(new List <Member> {
referee
})
.ToImmutableHashSet();
var state = new CurrentClusterState().Copy(members, unreachable);
var strategy = new KeepRefereeDowningStrategy(refereeAddress, downAllIfLessThanNodes: 0);
var victims = strategy.GetVictims(state);
victims.ToImmutableHashSet().SetEquals(members)
.Should().BeTrue("When we don't have the referee, we down all members");
}
public void ShouldParseConfig()
{
var address = Address.Parse("akka.tcp://system@hostname:1234");
var config = ConfigurationFactory.ParseString(string.Format(@"
akka.cluster.split-brain-resolver.keep-referee.address = ""{0}""
akka.cluster.split-brain-resolver.keep-referee.down-all-if-less-than-nodes = 10", address.ToString()));
var strategy = new KeepRefereeDowningStrategy(config);
strategy.Address.Should().Be(address);
strategy.DownAllIfLessThanNodes.Should().Be(10);
}
protected override IDowningStrategy GetDowningStrategy()
{
var config = System.Settings.Config;
var requestedStrategy =
config.GetString("akka.cluster.split-brain-resolver.active-strategy");
IDowningStrategy strategy = null;
switch (requestedStrategy)
{
case "static-quorum":
strategy = new StaticQuorumDowningStrategy(config);
break;
case "keep-referee":
strategy = new KeepRefereeDowningStrategy(config);
break;
case "keep-majority":
strategy = new KeepMajorityDowningStrategy(config);
break;
case "keep-oldest":
strategy = new KeepOldestDowningStrategy(config);
break;
case "off":
strategy = new NoopDowningStrategy();
break;
default:
throw new NotSupportedException($"Unknown downing strategy requested");
}
return(strategy);
}
