public void ShouldParseConfig()
{
var config = ConfigurationFactory.ParseString(@"
akka.cluster.split-brain-resolver.static-quorum.role = ""test""
akka.cluster.split-brain-resolver.static-quorum.quorum-size = 3");
var strategy = new StaticQuorumDowningStrategy(config);
strategy.Role.Should().Be("test");
strategy.QuorumSize.Should().Be(3);
}
public void ShouldNotDownPartitionsWithEnoughMembers()
{
var members = TestUtils.CreateMembers(MemberStatus.Up).Take(3).ToImmutableSortedSet();
var clusterState =
new CurrentClusterState()
.Copy(members);
var strategy = new StaticQuorumDowningStrategy(quorumSize: 3);
var victims = strategy.GetVictims(clusterState);
victims.Count().Should().Be(0, "Partitions with quorum size or greater should not be marked for downing");
}
public void ShouldDownPartitionsWithTooFewAvailableMembers()
{
var members = TestUtils.CreateMembers(MemberStatus.Up).Take(3).ToImmutableSortedSet();
var unreachableMembers = members.Take(1).ToImmutableHashSet();
var clusterState =
new CurrentClusterState()
.Copy(members, unreachableMembers);
var strategy = new StaticQuorumDowningStrategy(quorumSize: 3);
var victims = strategy.GetVictims(clusterState);
victims.ToImmutableHashSet().SetEquals(members)
.Should().BeTrue("Partitions with fewer available members than the quorum size should be marked for downing");
}
public void ShouldDownUnreachablesWhenEnoughAvailableMembers()
{
var members = TestUtils.CreateMembers(MemberStatus.Up).Take(5).ToImmutableSortedSet();
var unreachableMembers = members.Take(2).ToImmutableHashSet();
var clusterState =
new CurrentClusterState()
.Copy(members: members, unreachable: unreachableMembers);
var strategy = new StaticQuorumDowningStrategy(quorumSize: 3);
var victims = strategy.GetVictims(clusterState).ToList();
victims.ToImmutableHashSet().SetEquals(unreachableMembers)
.Should().BeTrue("Partitions with available members >= quorum size should down unreachable members");
}
public void ShouldNotDownPartitionsWithEnoughMembersInRole()
{
string roleName = "SomeRole";
var roles = new string[] { roleName }.ToImmutableHashSet();
var membersInRole = TestUtils.CreateMembers(MemberStatus.Up, roles).Take(3).ToList();
var members =
TestUtils.CreateMembers(MemberStatus.Up)
.Take(2)
.Concat(membersInRole)
.ToImmutableSortedSet();
var clusterState = new CurrentClusterState().Copy(members);
var strategy = new StaticQuorumDowningStrategy(quorumSize: 3, role: roleName);
var victims = strategy.GetVictims(clusterState);
victims.Count().Should().Be(0, "Partitions with fewer than the quorum size should be marked for downing");
}
