open-consul/agent/consul/merge_test.go

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package consul
import (
"testing"
uuid "github.com/hashicorp/go-uuid"
"github.com/hashicorp/serf/serf"
"github.com/stretchr/testify/require"
"github.com/hashicorp/consul/sdk/testutil"
"github.com/hashicorp/consul/types"
)
func TestMerge_LAN(t *testing.T) {
type testcase struct {
members []*serf.Member
expect string
}
const thisNodeID = "ee954a2f-80de-4b34-8780-97b942a50a99"
run := func(t *testing.T, tc testcase) {
delegate := &lanMergeDelegate{
dc: "dc1",
nodeID: types.NodeID(thisNodeID),
nodeName: "node0",
}
err := delegate.NotifyMerge(tc.members)
if tc.expect == "" {
require.NoError(t, err)
} else {
testutil.RequireErrorContains(t, err, tc.expect)
}
}
cases := map[string]testcase{
"client in the wrong datacenter": {
members: []*serf.Member{
makeTestNode(t, testMember{
dc: "dc2",
name: "node1",
server: false,
build: "0.7.5",
}),
},
expect: "wrong datacenter",
},
"server in the wrong datacenter": {
members: []*serf.Member{
makeTestNode(t, testMember{
dc: "dc2",
name: "node1",
server: true,
build: "0.7.5",
}),
},
expect: "wrong datacenter",
},
"node ID conflict with delegate's ID": {
members: []*serf.Member{
makeTestNode(t, testMember{
dc: "dc1",
name: "node1",
id: thisNodeID,
server: true,
build: "0.7.5",
}),
},
expect: "with this agent's ID",
},
"cluster with existing conflicting node IDs": {
members: []*serf.Member{
makeTestNode(t, testMember{
dc: "dc1",
name: "node1",
id: "6185913b-98d7-4441-bd8f-f7f7d854a4af",
server: true,
build: "0.8.5",
}),
makeTestNode(t, testMember{
dc: "dc1",
name: "node2",
id: "6185913b-98d7-4441-bd8f-f7f7d854a4af",
server: true,
build: "0.9.0",
}),
},
expect: "with member",
},
"cluster with existing conflicting node IDs, but version is old enough to skip the check": {
members: []*serf.Member{
makeTestNode(t, testMember{
dc: "dc1",
name: "node1",
id: "6185913b-98d7-4441-bd8f-f7f7d854a4af",
server: true,
build: "0.8.5",
}),
makeTestNode(t, testMember{
dc: "dc1",
name: "node2",
id: "6185913b-98d7-4441-bd8f-f7f7d854a4af",
server: true,
build: "0.8.4",
}),
},
expect: "with member",
},
"good cluster": {
members: []*serf.Member{
makeTestNode(t, testMember{
dc: "dc1",
name: "node1",
server: true,
build: "0.8.5",
}),
makeTestNode(t, testMember{
dc: "dc1",
name: "node2",
server: true,
build: "0.8.5",
}),
},
expect: "",
},
}
for name, tc := range cases {
t.Run(name, func(t *testing.T) {
run(t, tc)
})
}
}
func TestMerge_WAN(t *testing.T) {
type testcase struct {
members []*serf.Member
expect string
}
run := func(t *testing.T, tc testcase) {
delegate := &wanMergeDelegate{}
err := delegate.NotifyMerge(tc.members)
if tc.expect == "" {
require.NoError(t, err)
} else {
testutil.RequireErrorContains(t, err, tc.expect)
}
}
cases := map[string]testcase{
"not a server": {
members: []*serf.Member{
makeTestNode(t, testMember{
dc: "dc2",
name: "node1",
server: false,
build: "0.7.5",
}),
},
expect: "not a server",
},
"good cluster": {
members: []*serf.Member{
makeTestNode(t, testMember{
dc: "dc2",
name: "node1",
server: true,
build: "0.7.5",
}),
makeTestNode(t, testMember{
dc: "dc3",
name: "node2",
server: true,
build: "0.7.5",
}),
},
expect: "",
},
}
for name, tc := range cases {
t.Run(name, func(t *testing.T) {
run(t, tc)
})
}
}
type testMember struct {
dc string
name string
id string
server bool
build string
segment string
partition string
}
func (tm testMember) role() string {
if tm.server {
return "consul"
}
return "node"
}
func makeTestNode(t *testing.T, tm testMember) *serf.Member {
if tm.id == "" {
uuid, err := uuid.GenerateUUID()
require.NoError(t, err)
tm.id = uuid
}
m := &serf.Member{
Name: tm.name,
Tags: map[string]string{
"role": tm.role(),
"dc": tm.dc,
"id": tm.id,
"port": "8300",
"segment": tm.segment,
"build": tm.build,
"vsn": "2",
"vsn_max": "3",
"vsn_min": "2",
},
}
if tm.partition != "" {
m.Tags["ap"] = tm.partition
}
return m
}