terraform/state/remote/atlas_test.go

294 lines
6.7 KiB
Go

package remote
import (
"bytes"
"crypto/md5"
"net/http"
"net/http/httptest"
"os"
"testing"
"time"
"github.com/hashicorp/terraform/helper/acctest"
"github.com/hashicorp/terraform/terraform"
)
func TestAtlasClient_impl(t *testing.T) {
var _ Client = new(AtlasClient)
}
func TestAtlasClient(t *testing.T) {
acctest.RemoteTestPrecheck(t)
token := os.Getenv("ATLAS_TOKEN")
if token == "" {
t.Skipf("skipping, ATLAS_TOKEN must be set")
}
client, err := atlasFactory(map[string]string{
"access_token": token,
"name": "hashicorp/test-remote-state",
})
if err != nil {
t.Fatalf("bad: %s", err)
}
testClient(t, client)
}
func TestAtlasClient_ReportedConflictEqualStates(t *testing.T) {
fakeAtlas := newFakeAtlas(t, testStateModuleOrderChange)
srv := fakeAtlas.Server()
defer srv.Close()
client, err := atlasFactory(map[string]string{
"access_token": "sometoken",
"name": "someuser/some-test-remote-state",
"address": srv.URL,
})
if err != nil {
t.Fatalf("err: %s", err)
}
state, err := terraform.ReadState(bytes.NewReader(testStateModuleOrderChange))
if err != nil {
t.Fatalf("err: %s", err)
}
var stateJson bytes.Buffer
if err := terraform.WriteState(state, &stateJson); err != nil {
t.Fatalf("err: %s", err)
}
if err := client.Put(stateJson.Bytes()); err != nil {
t.Fatalf("err: %s", err)
}
}
func TestAtlasClient_NoConflict(t *testing.T) {
fakeAtlas := newFakeAtlas(t, testStateSimple)
srv := fakeAtlas.Server()
defer srv.Close()
client, err := atlasFactory(map[string]string{
"access_token": "sometoken",
"name": "someuser/some-test-remote-state",
"address": srv.URL,
})
if err != nil {
t.Fatalf("err: %s", err)
}
state, err := terraform.ReadState(bytes.NewReader(testStateSimple))
if err != nil {
t.Fatalf("err: %s", err)
}
fakeAtlas.NoConflictAllowed(true)
var stateJson bytes.Buffer
if err := terraform.WriteState(state, &stateJson); err != nil {
t.Fatalf("err: %s", err)
}
if err := client.Put(stateJson.Bytes()); err != nil {
t.Fatalf("err: %s", err)
}
}
func TestAtlasClient_LegitimateConflict(t *testing.T) {
fakeAtlas := newFakeAtlas(t, testStateSimple)
srv := fakeAtlas.Server()
defer srv.Close()
client, err := atlasFactory(map[string]string{
"access_token": "sometoken",
"name": "someuser/some-test-remote-state",
"address": srv.URL,
})
if err != nil {
t.Fatalf("err: %s", err)
}
state, err := terraform.ReadState(bytes.NewReader(testStateSimple))
if err != nil {
t.Fatalf("err: %s", err)
}
// Changing the state but not the serial. Should generate a conflict.
state.RootModule().Outputs["drift"] = "happens"
var stateJson bytes.Buffer
if err := terraform.WriteState(state, &stateJson); err != nil {
t.Fatalf("err: %s", err)
}
if err := client.Put(stateJson.Bytes()); err == nil {
t.Fatal("Expected error from state conflict, got none.")
}
}
func TestAtlasClient_UnresolvableConflict(t *testing.T) {
fakeAtlas := newFakeAtlas(t, testStateSimple)
// Something unexpected causes Atlas to conflict in a way that we can't fix.
fakeAtlas.AlwaysConflict(true)
srv := fakeAtlas.Server()
defer srv.Close()
client, err := atlasFactory(map[string]string{
"access_token": "sometoken",
"name": "someuser/some-test-remote-state",
"address": srv.URL,
})
if err != nil {
t.Fatalf("err: %s", err)
}
state, err := terraform.ReadState(bytes.NewReader(testStateSimple))
if err != nil {
t.Fatalf("err: %s", err)
}
var stateJson bytes.Buffer
if err := terraform.WriteState(state, &stateJson); err != nil {
t.Fatalf("err: %s", err)
}
doneCh := make(chan struct{})
go func() {
defer close(doneCh)
if err := client.Put(stateJson.Bytes()); err == nil {
t.Fatal("Expected error from state conflict, got none.")
}
}()
select {
case <-doneCh:
// OK
case <-time.After(50 * time.Millisecond):
t.Fatalf("Timed out after 50ms, probably because retrying infinitely.")
}
}
// Stub Atlas HTTP API for a given state JSON string; does checksum-based
// conflict detection equivalent to Atlas's.
type fakeAtlas struct {
state []byte
t *testing.T
// Used to test that we only do the special conflict handling retry once.
alwaysConflict bool
// Used to fail the test immediately if a conflict happens.
noConflictAllowed bool
}
func newFakeAtlas(t *testing.T, state []byte) *fakeAtlas {
return &fakeAtlas{
state: state,
t: t,
}
}
func (f *fakeAtlas) Server() *httptest.Server {
return httptest.NewServer(http.HandlerFunc(f.handler))
}
func (f *fakeAtlas) CurrentState() *terraform.State {
currentState, err := terraform.ReadState(bytes.NewReader(f.state))
if err != nil {
f.t.Fatalf("err: %s", err)
}
return currentState
}
func (f *fakeAtlas) CurrentSerial() int64 {
return f.CurrentState().Serial
}
func (f *fakeAtlas) CurrentSum() [md5.Size]byte {
return md5.Sum(f.state)
}
func (f *fakeAtlas) AlwaysConflict(b bool) {
f.alwaysConflict = b
}
func (f *fakeAtlas) NoConflictAllowed(b bool) {
f.noConflictAllowed = b
}
func (f *fakeAtlas) handler(resp http.ResponseWriter, req *http.Request) {
switch req.Method {
case "GET":
// Respond with the current stored state.
resp.Header().Set("Content-Type", "application/json")
resp.Write(f.state)
case "PUT":
var buf bytes.Buffer
buf.ReadFrom(req.Body)
sum := md5.Sum(buf.Bytes())
state, err := terraform.ReadState(&buf)
if err != nil {
f.t.Fatalf("err: %s", err)
}
conflict := f.CurrentSerial() == state.Serial && f.CurrentSum() != sum
conflict = conflict || f.alwaysConflict
if conflict {
if f.noConflictAllowed {
f.t.Fatal("Got conflict when NoConflictAllowed was set.")
}
http.Error(resp, "Conflict", 409)
} else {
f.state = buf.Bytes()
resp.WriteHeader(200)
}
}
}
// This is a tfstate file with the module order changed, which is a structural
// but not a semantic difference. Terraform will sort these modules as it
// loads the state.
var testStateModuleOrderChange = []byte(
`{
"version": 2,
"serial": 1,
"modules": [
{
"path": [
"root",
"child2",
"grandchild"
],
"outputs": {
"foo": "bar2"
},
"resources": null
},
{
"path": [
"root",
"child1",
"grandchild"
],
"outputs": {
"foo": "bar1"
},
"resources": null
}
]
}
`)
var testStateSimple = []byte(
`{
"version": 2,
"serial": 1,
"modules": [
{
"path": [
"root"
],
"outputs": {
"foo": "bar"
},
"resources": null
}
]
}
`)