forked from hashicorp/consul-template
/
dedup_test.go
232 lines (193 loc) · 4.71 KB
/
dedup_test.go
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package main
import (
"io/ioutil"
"testing"
"time"
"github.com/hashicorp/consul-template/dependency"
"github.com/hashicorp/consul-template/test"
"github.com/hashicorp/consul/testutil"
)
func testDedupManager(t *testing.T, templ []*Template) (*testutil.TestServer, *DedupManager) {
consul := testutil.NewTestServerConfig(t, func(c *testutil.TestServerConfig) {
c.Stdout = ioutil.Discard
c.Stderr = ioutil.Discard
})
// Setup the configuration
config := DefaultConfig()
config.Consul = consul.HTTPAddr
// Create the clientset
clients, err := newClientSet(config)
if err != nil {
t.Fatalf("runner: %s", err)
}
// Setup a brain
brain := NewBrain()
// Create the dedup manager
dedup, err := NewDedupManager(config, clients, brain, templ)
if err != nil {
t.Fatalf("err: %v", err)
}
return consul, dedup
}
func testDedupFollower(t *testing.T, leader *DedupManager) *DedupManager {
// Setup the configuration
config := DefaultConfig()
config.Consul = leader.config.Consul
// Create the clientset
clients, err := newClientSet(config)
if err != nil {
t.Fatalf("runner: %s", err)
}
// Setup a brain
brain := NewBrain()
// Create the dedup manager
dedup, err := NewDedupManager(config, clients, brain, leader.templates)
if err != nil {
t.Fatalf("err: %v", err)
}
return dedup
}
func TestDedup_StartStop(t *testing.T) {
t.Parallel()
consul, dedup := testDedupManager(t, nil)
defer consul.Stop()
// Start and stop
if err := dedup.Start(); err != nil {
t.Fatalf("err: %v", err)
}
if err := dedup.Stop(); err != nil {
t.Fatalf("err: %v", err)
}
}
func TestDedup_IsLeader(t *testing.T) {
t.Parallel()
// Create a template
in := test.CreateTempfile([]byte(`
{{ range service "consul" }}{{.Node}}{{ end }}
`), t)
defer test.DeleteTempfile(in, t)
tmpl, err := NewTemplate(in.Name())
if err != nil {
t.Fatalf("err: %v", err)
}
consul, dedup := testDedupManager(t, []*Template{tmpl})
defer consul.Stop()
// Start dedup
if err := dedup.Start(); err != nil {
t.Fatalf("err: %v", err)
}
defer dedup.Stop()
// Wait until we are leader
select {
case <-dedup.UpdateCh():
case <-time.After(2 * time.Second):
t.Fatalf("timeout")
}
// Check that we are the leader
if !dedup.IsLeader(tmpl) {
t.Fatalf("should be leader")
}
}
func TestDedup_UpdateDeps(t *testing.T) {
t.Parallel()
// Create a template
in := test.CreateTempfile([]byte(`
{{ range service "consul" }}{{.Node}}{{ end }}
`), t)
defer test.DeleteTempfile(in, t)
tmpl, err := NewTemplate(in.Name())
if err != nil {
t.Fatalf("err: %v", err)
}
consul, dedup := testDedupManager(t, []*Template{tmpl})
defer consul.Stop()
// Start dedup
if err := dedup.Start(); err != nil {
t.Fatalf("err: %v", err)
}
defer dedup.Stop()
// Wait until we are leader
select {
case <-dedup.UpdateCh():
case <-time.After(2 * time.Second):
t.Fatalf("timeout")
}
// Create the dependency
dep, err := dependency.ParseHealthServices("consul")
if err != nil {
t.Fatalf("err: %v", err)
}
// Inject data into the brain
dedup.brain.Remember(dep, 123)
// Update the dependencies
err = dedup.UpdateDeps(tmpl, []dependency.Dependency{dep})
if err != nil {
t.Fatalf("err: %v", err)
}
}
func TestDedup_FollowerUpdate(t *testing.T) {
t.Parallel()
// Create a template
in := test.CreateTempfile([]byte(`
{{ range service "consul" }}{{.Node}}{{ end }}
`), t)
defer test.DeleteTempfile(in, t)
tmpl, err := NewTemplate(in.Name())
if err != nil {
t.Fatalf("err: %v", err)
}
consul, dedup1 := testDedupManager(t, []*Template{tmpl})
defer consul.Stop()
dedup2 := testDedupFollower(t, dedup1)
// Start dedups
if err := dedup1.Start(); err != nil {
t.Fatalf("err: %v", err)
}
defer dedup1.Stop()
if err := dedup2.Start(); err != nil {
t.Fatalf("err: %v", err)
}
defer dedup2.Stop()
// Wait until we have a leader
var leader, follow *DedupManager
select {
case <-dedup1.UpdateCh():
if dedup1.IsLeader(tmpl) {
leader = dedup1
follow = dedup2
}
case <-dedup2.UpdateCh():
if dedup2.IsLeader(tmpl) {
leader = dedup2
follow = dedup1
}
case <-time.After(2 * time.Second):
t.Fatalf("timeout")
}
// Create the dependency
dep, err := dependency.ParseHealthServices("consul")
if err != nil {
t.Fatalf("err: %v", err)
}
// Inject data into the brain
leader.brain.Remember(dep, 123)
// Update the dependencies
err = leader.UpdateDeps(tmpl, []dependency.Dependency{dep})
if err != nil {
t.Fatalf("err: %v", err)
}
// Follower should get an update
select {
case <-follow.UpdateCh():
case <-time.After(2 * time.Second):
t.Fatalf("timeout")
}
// Recall from the brain
data, ok := follow.brain.Recall(dep)
if !ok {
t.Fatalf("missing data")
}
if data != 123 {
t.Fatalf("bad: %v", data)
}
}