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Added leader election test

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Signed-off-by: Drew Erny <drew.erny@docker.com>
(cherry picked from commit 3489e76513)
Signed-off-by: Tibor Vass <tibor@docker.com>
This commit is contained in:
Drew Erny 2016-07-18 16:31:43 -07:00 committed by Tibor Vass
parent 178b6874a1
commit fd231567dc
1 changed files with 51 additions and 0 deletions
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51
integration-cli/docker_api_swarm_test.go
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@ -492,6 +492,57 @@ func (s *DockerSwarmSuite) TestApiSwarmServicesStateReporting(c *check.C) {
}
}
func (s *DockerSwarmSuite) TestApiSwarmLeaderElection(c *check.C) {
// Create 3 nodes
d1 := s.AddDaemon(c, true, true)
d2 := s.AddDaemon(c, true, true)
d3 := s.AddDaemon(c, true, true)
// assert that the first node we made is the leader, and the other two are followers
c.Assert(d1.getNode(c, d1.NodeID).ManagerStatus.Leader, checker.True)
c.Assert(d1.getNode(c, d2.NodeID).ManagerStatus.Leader, checker.False)
c.Assert(d1.getNode(c, d3.NodeID).ManagerStatus.Leader, checker.False)
leader := d1
// stop the leader
leader.Stop()
// wait for an election to occur
var newleader *SwarmDaemon
for _, d := range []*SwarmDaemon{d2, d3} {
if d.getNode(c, d.NodeID).ManagerStatus.Leader {
newleader = d
break
}
}
// assert that we have a new leader
c.Assert(newleader, checker.NotNil)
// add the old leader back
leader.Start()
// clear leader and reinit the followers list
followers := make([]*SwarmDaemon, 0, 3)
// pick out the leader and the followers again
for _, d := range []*SwarmDaemon{d1, d2, d3} {
if d1.getNode(c, d.NodeID).ManagerStatus.Leader {
leader = d
} else {
followers = append(followers, d)
}
}
// verify that we still only have 1 leader and 2 followers
c.Assert(leader, checker.NotNil)
c.Assert(followers, checker.HasLen, 2)
// and that after we added d1 back, the leader hasn't changed
c.Assert(leader.NodeID, checker.Equals, newleader.NodeID)
}
func (s *DockerSwarmSuite) TestApiSwarmRaftQuorum(c *check.C) {
testRequires(c, Network)
d1 := s.AddDaemon(c, true, true)