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consul: Fix several problems w/ consul_keys update 

Implementation notes:

 * The hash implementation was not considering key value, causing "diffs
   did not match" errors when a value was updated. Switching to default
   HashResource implementation fixes this
 * Using HashResource as a default exposed a bug in helper/schema that
   needed to be fixed so the Set function is picked up properly during
   Read
 * Stop writing back values into the `key` attribute; it triggers extra
   diffs when `default` is used. Computed values all just go into `var`.
 * Includes a state migration to prevent unnecessary diffs based on
   "key" attribute hashcodes changing.

In the tests:

 * Switch from leaning on the public demo Consul instance to requiring a
   CONSUL_HTTP_ADDR variable be set pointing to a `consul agent -dev`
   instance to be used only for testing.
 * Add a test that exposes the updating issues and covers the fixes

Fixes #774
Fixes #1866
Fixes #3023
This commit is contained in:
Paul Hinze 2016-01-21 14:54:56 -06:00
parent da4e7753e7
commit 069425a700
6 changed files with 257 additions and 75 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

98
builtin/providers/consul/resource_consul_keys.go
View File

@ -1,13 +1,11 @@
package consul
import (
"bytes"
"fmt"
"log"
"strconv"
consulapi "github.com/hashicorp/consul/api"
"github.com/hashicorp/terraform/helper/hashcode"
"github.com/hashicorp/terraform/helper/schema"
)
@ -18,6 +16,9 @@ func resourceConsulKeys() *schema.Resource {
Read: resourceConsulKeysRead,
Delete: resourceConsulKeysDelete,
SchemaVersion: 1,
MigrateState: resourceConsulKeysMigrateState,
Schema: map[string]*schema.Schema{
"datacenter": &schema.Schema{
Type: schema.TypeString,
@ -64,7 +65,6 @@ func resourceConsulKeys() *schema.Resource {
},
},
},
Set: resourceConsulKeysHash,
},
"var": &schema.Schema{
@ -75,36 +75,14 @@ func resourceConsulKeys() *schema.Resource {
}
}
func resourceConsulKeysHash(v interface{}) int {
var buf bytes.Buffer
m := v.(map[string]interface{})
buf.WriteString(fmt.Sprintf("%s-", m["name"].(string)))
buf.WriteString(fmt.Sprintf("%s-", m["path"].(string)))
return hashcode.String(buf.String())
}
func resourceConsulKeysCreate(d *schema.ResourceData, meta interface{}) error {
client := meta.(*consulapi.Client)
kv := client.KV()
// Resolve the datacenter first, all the other keys are dependent
// on this.
var dc string
if v, ok := d.GetOk("datacenter"); ok {
dc = v.(string)
log.Printf("[DEBUG] Consul datacenter: %s", dc)
} else {
log.Printf("[DEBUG] Resolving Consul datacenter...")
var err error
dc, err = getDC(client)
token := d.Get("token").(string)
dc, err := getDC(d, client)
if err != nil {
return err
}
}
var token string
if v, ok := d.GetOk("token"); ok {
token = v.(string)
}
// Setup the operations using the datacenter
qOpts := consulapi.QueryOptions{Datacenter: dc, Token: token}
@ -129,8 +107,6 @@ func resourceConsulKeysCreate(d *schema.ResourceData, meta interface{}) error {
return fmt.Errorf("Failed to set Consul key '%s': %v", path, err)
}
vars[key] = value
sub["value"] = value
} else {
log.Printf("[DEBUG] Getting key '%s' in %s", path, dc)
pair, _, err := kv.Get(path, &qOpts)
@ -142,29 +118,29 @@ func resourceConsulKeysCreate(d *schema.ResourceData, meta interface{}) error {
}
}
// Update the resource
// The ID doesn't matter, since we use provider config, datacenter,
// and key paths to address consul properly. So we just need to fill it in
// with some value to indicate the resource has been created.
d.SetId("consul")
// Set the vars we collected above
if err := d.Set("var", vars); err != nil {
return err
}
// Store the datacenter on this resource, which can be helpful for reference
// in case it was read from the provider
d.Set("datacenter", dc)
d.Set("key", keys)
d.Set("var", vars)
return nil
}
func resourceConsulKeysRead(d *schema.ResourceData, meta interface{}) error {
client := meta.(*consulapi.Client)
kv := client.KV()
// Get the DC, error if not available.
var dc string
if v, ok := d.GetOk("datacenter"); ok {
dc = v.(string)
log.Printf("[DEBUG] Consul datacenter: %s", dc)
} else {
return fmt.Errorf("Missing datacenter configuration")
}
var token string
if v, ok := d.GetOk("token"); ok {
token = v.(string)
token := d.Get("token").(string)
dc, err := getDC(d, client)
if err != nil {
return err
}
// Setup the operations using the datacenter
@ -189,30 +165,26 @@ func resourceConsulKeysRead(d *schema.ResourceData, meta interface{}) error {
value := attributeValue(sub, key, pair)
vars[key] = value
sub["value"] = value
}
// Update the resource
d.Set("key", keys)
d.Set("var", vars)
if err := d.Set("var", vars); err != nil {
return err
}
// Store the datacenter on this resource, which can be helpful for reference
// in case it was read from the provider
d.Set("datacenter", dc)
return nil
}
func resourceConsulKeysDelete(d *schema.ResourceData, meta interface{}) error {
client := meta.(*consulapi.Client)
kv := client.KV()
// Get the DC, error if not available.
var dc string
if v, ok := d.GetOk("datacenter"); ok {
dc = v.(string)
log.Printf("[DEBUG] Consul datacenter: %s", dc)
} else {
return fmt.Errorf("Missing datacenter configuration")
}
var token string
if v, ok := d.GetOk("token"); ok {
token = v.(string)
token := d.Get("token").(string)
dc, err := getDC(d, client)
if err != nil {
return err
}
// Setup the operations using the datacenter
@ -285,11 +257,13 @@ func attributeValue(sub map[string]interface{}, key string, pair *consulapi.KVPa
}
// getDC is used to get the datacenter of the local agent
func getDC(client *consulapi.Client) (string, error) {
func getDC(d *schema.ResourceData, client *consulapi.Client) (string, error) {
if v, ok := d.GetOk("datacenter"); ok {
return v.(string), nil
}
info, err := client.Agent().Self()
if err != nil {
return "", fmt.Errorf("Failed to get datacenter from Consul agent: %v", err)
}
dc := info["Config"]["Datacenter"].(string)
return dc, nil
return info["Config"]["Datacenter"].(string), nil
}

92
builtin/providers/consul/resource_consul_keys_migrate.go Normal file
View File

@ -0,0 +1,92 @@
package consul
import (
"fmt"
"log"
"strings"
"github.com/hashicorp/terraform/helper/schema"
"github.com/hashicorp/terraform/terraform"
)
func resourceConsulKeysMigrateState(
v int, is *terraform.InstanceState, meta interface{}) (*terraform.InstanceState, error) {
switch v {
case 0:
log.Println("[INFO] Found consul_keys State v0; migrating to v1")
return resourceConsulKeysMigrateStateV0toV1(is)
default:
return is, fmt.Errorf("Unexpected schema version: %d", v)
}
}
func resourceConsulKeysMigrateStateV0toV1(is *terraform.InstanceState) (*terraform.InstanceState, error) {
if is.Empty() || is.Attributes == nil {
log.Println("[DEBUG] Empty InstanceState; nothing to migrate.")
return is, nil
}
log.Printf("[DEBUG] Attributes before migration: %#v", is.Attributes)
res := resourceConsulKeys()
keys, err := readV0Keys(is, res)
if err != nil {
return is, err
}
if err := clearV0Keys(is); err != nil {
return is, err
}
if err := writeV1Keys(is, res, keys); err != nil {
return is, err
}
log.Printf("[DEBUG] Attributes after migration: %#v", is.Attributes)
return is, nil
}
func readV0Keys(
is *terraform.InstanceState,
res *schema.Resource,
) (*schema.Set, error) {
reader := &schema.MapFieldReader{
Schema: res.Schema,
Map: schema.BasicMapReader(is.Attributes),
}
result, err := reader.ReadField([]string{"key"})
if err != nil {
return nil, err
}
oldKeys, ok := result.Value.(*schema.Set)
if !ok {
return nil, fmt.Errorf("Got unexpected value from state: %#v", result.Value)
}
return oldKeys, nil
}
func clearV0Keys(is *terraform.InstanceState) error {
for k := range is.Attributes {
if strings.HasPrefix(k, "key.") {
delete(is.Attributes, k)
}
}
return nil
}
func writeV1Keys(
is *terraform.InstanceState,
res *schema.Resource,
keys *schema.Set,
) error {
writer := schema.MapFieldWriter{
Schema: res.Schema,
}
if err := writer.WriteField([]string{"key"}, keys); err != nil {
return err
}
for k, v := range writer.Map() {
is.Attributes[k] = v
}
return nil
}

90
builtin/providers/consul/resource_consul_keys_migrate_test.go Normal file
View File

@ -0,0 +1,90 @@
package consul
import (
"testing"
"github.com/hashicorp/terraform/terraform"
)
func TestConsulKeysMigrateState(t *testing.T) {
cases := map[string]struct {
StateVersion int
Attributes map[string]string
Expected map[string]string
Meta interface{}
}{
"v0.6.9 and earlier, with old values hash function": {
StateVersion: 0,
Attributes: map[string]string{
"key.#": "2",
"key.12345.name": "hello",
"key.12345.path": "foo/bar",
"key.12345.value": "world",
"key.12345.default": "",
"key.12345.delete": "false",
"key.6789.name": "temp",
"key.6789.path": "foo/foo",
"key.6789.value": "",
"key.6789.default": "",
"key.6789.delete": "true",
},
Expected: map[string]string{
"key.#": "2",
"key.2401383718.default": "",
"key.2401383718.delete": "true",
"key.2401383718.name": "temp",
"key.2401383718.path": "foo/foo",
"key.2401383718.value": "",
"key.3116955509.path": "foo/bar",
"key.3116955509.default": "",
"key.3116955509.delete": "false",
"key.3116955509.name": "hello",
"key.3116955509.value": "world",
},
},
}
for tn, tc := range cases {
is := &terraform.InstanceState{
ID: "consul",
Attributes: tc.Attributes,
}
is, err := resourceConsulKeys().MigrateState(
tc.StateVersion, is, tc.Meta)
if err != nil {
t.Fatalf("bad: %s, err: %#v", tn, err)
}
for k, v := range tc.Expected {
if is.Attributes[k] != v {
t.Fatalf(
"bad: %s\n\n expected: %#v -> %#v\n got: %#v -> %#v\n in: %#v",
tn, k, v, k, is.Attributes[k], is.Attributes)
}
}
}
}
func TestConsulKeysMigrateState_empty(t *testing.T) {
var is *terraform.InstanceState
var meta interface{}
// should handle nil
is, err := resourceConsulKeys().MigrateState(0, is, meta)
if err != nil {
t.Fatalf("err: %#v", err)
}
if is != nil {
t.Fatalf("expected nil instancestate, got: %#v", is)
}
// should handle non-nil but empty
is = &terraform.InstanceState{}
is, err = resourceConsulKeys().MigrateState(0, is, meta)
if err != nil {
t.Fatalf("err: %#v", err)
}
}

38
builtin/providers/consul/resource_consul_keys_test.go
View File

@ -11,7 +11,7 @@ import (
func TestAccConsulKeys_basic(t *testing.T) {
resource.Test(t, resource.TestCase{
PreCheck: func() {},
PreCheck: func() { testAccPreCheck(t) },
Providers: testAccProviders,
CheckDestroy: testAccCheckConsulKeysDestroy,
Steps: []resource.TestStep{
@ -19,18 +19,25 @@ func TestAccConsulKeys_basic(t *testing.T) {
Config: testAccConsulKeysConfig,
Check: resource.ComposeTestCheckFunc(
testAccCheckConsulKeysExists(),
testAccCheckConsulKeysValue("consul_keys.app", "time", "<any>"),
testAccCheckConsulKeysValue("consul_keys.app", "enabled", "true"),
testAccCheckConsulKeysValue("consul_keys.app", "set", "acceptance"),
),
},
resource.TestStep{
Config: testAccConsulKeysConfig_Update,
Check: resource.ComposeTestCheckFunc(
testAccCheckConsulKeysExists(),
testAccCheckConsulKeysValue("consul_keys.app", "enabled", "true"),
testAccCheckConsulKeysValue("consul_keys.app", "set", "acceptanceUpdated"),
),
},
},
})
}
func testAccCheckConsulKeysDestroy(s *terraform.State) error {
kv := testAccProvider.Meta().(*consulapi.Client).KV()
opts := &consulapi.QueryOptions{Datacenter: "nyc3"}
opts := &consulapi.QueryOptions{Datacenter: "dc1"}
pair, _, err := kv.Get("test/set", opts)
if err != nil {
return err
@ -44,7 +51,7 @@ func testAccCheckConsulKeysDestroy(s *terraform.State) error {
func testAccCheckConsulKeysExists() resource.TestCheckFunc {
return func(s *terraform.State) error {
kv := testAccProvider.Meta().(*consulapi.Client).KV()
opts := &consulapi.QueryOptions{Datacenter: "nyc3"}
opts := &consulapi.QueryOptions{Datacenter: "dc1"}
pair, _, err := kv.Get("test/set", opts)
if err != nil {
return err
@ -78,11 +85,7 @@ func testAccCheckConsulKeysValue(n, attr, val string) resource.TestCheckFunc {
const testAccConsulKeysConfig = `
resource "consul_keys" "app" {
datacenter = "nyc3"
key {
name = "time"
path = "global/time"
}
datacenter = "dc1"
key {
name = "enabled"
path = "test/enabled"
@ -96,3 +99,20 @@ resource "consul_keys" "app" {
}
}
`
const testAccConsulKeysConfig_Update = `
resource "consul_keys" "app" {
datacenter = "dc1"
key {
name = "enabled"
path = "test/enabled"
default = "true"
}
key {
name = "set"
path = "test/set"
value = "acceptanceUpdated"
delete = true
}
}
`

8
builtin/providers/consul/resource_provider_test.go
View File

@ -1,6 +1,7 @@
package consul
import (
"os"
"testing"
consulapi "github.com/hashicorp/consul/api"
@ -21,7 +22,6 @@ func init() {
// Use the demo address for the acceptance tests
testAccProvider.ConfigureFunc = func(d *schema.ResourceData) (interface{}, error) {
conf := consulapi.DefaultConfig()
conf.Address = "demo.consul.io:80"
return consulapi.NewClient(conf)
}
}
@ -55,3 +55,9 @@ func TestResourceProvider_Configure(t *testing.T) {
t.Fatalf("err: %s", err)
}
}
func testAccPreCheck(t *testing.T) {
if v := os.Getenv("CONSUL_HTTP_ADDR"); v == "" {
t.Fatal("CONSUL_HTTP_ADDR must be set for acceptance tests")
}
}

2
helper/schema/field_writer_map.go
View File

@ -277,7 +277,7 @@ func (w *MapFieldWriter) setSet(
// not the `value` directly is because this forces all types
// to become []interface{} (generic) instead of []string, which
// most hash functions are expecting.
s := &Set{F: schema.Set}
s := schema.ZeroValue().(*Set)
tempR := &MapFieldReader{
Map: BasicMapReader(tempW.Map()),
Schema: tempSchemaMap,