637 lines
20 KiB
Go
637 lines
20 KiB
Go
package oss
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import (
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"context"
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"encoding/json"
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"fmt"
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"io/ioutil"
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"os"
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"runtime"
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"strings"
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"github.com/aliyun/alibaba-cloud-sdk-go/sdk/requests"
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"github.com/aliyun/alibaba-cloud-sdk-go/sdk/responses"
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"github.com/aliyun/alibaba-cloud-sdk-go/services/sts"
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"github.com/aliyun/aliyun-oss-go-sdk/oss"
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"github.com/hashicorp/terraform/backend"
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"github.com/hashicorp/terraform/helper/schema"
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"github.com/hashicorp/terraform/helper/validation"
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"github.com/jmespath/go-jmespath"
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"log"
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"net/http"
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"strconv"
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"time"
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"github.com/aliyun/alibaba-cloud-sdk-go/sdk"
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"github.com/aliyun/alibaba-cloud-sdk-go/sdk/auth/credentials"
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"github.com/aliyun/alibaba-cloud-sdk-go/services/location"
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"github.com/aliyun/aliyun-tablestore-go-sdk/tablestore"
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"github.com/hashicorp/go-cleanhttp"
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"github.com/hashicorp/terraform/version"
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"github.com/mitchellh/go-homedir"
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"net/url"
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"regexp"
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)
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// New creates a new backend for OSS remote state.
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func New() backend.Backend {
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s := &schema.Backend{
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Schema: map[string]*schema.Schema{
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"access_key": &schema.Schema{
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Type: schema.TypeString,
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Optional: true,
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Description: "Alibaba Cloud Access Key ID",
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DefaultFunc: schema.EnvDefaultFunc("ALICLOUD_ACCESS_KEY", os.Getenv("ALICLOUD_ACCESS_KEY_ID")),
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},
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"secret_key": &schema.Schema{
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Type: schema.TypeString,
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Optional: true,
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Description: "Alibaba Cloud Access Secret Key",
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DefaultFunc: schema.EnvDefaultFunc("ALICLOUD_SECRET_KEY", os.Getenv("ALICLOUD_ACCESS_KEY_SECRET")),
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},
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"security_token": &schema.Schema{
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Type: schema.TypeString,
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Optional: true,
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Description: "Alibaba Cloud Security Token",
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DefaultFunc: schema.EnvDefaultFunc("ALICLOUD_SECURITY_TOKEN", ""),
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},
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"ecs_role_name": {
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Type: schema.TypeString,
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Optional: true,
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DefaultFunc: schema.EnvDefaultFunc("ALICLOUD_ECS_ROLE_NAME", os.Getenv("ALICLOUD_ECS_ROLE_NAME")),
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Description: "The RAM Role Name attached on a ECS instance for API operations. You can retrieve this from the 'Access Control' section of the Alibaba Cloud console.",
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},
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"region": &schema.Schema{
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Type: schema.TypeString,
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Optional: true,
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Description: "The region of the OSS bucket.",
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DefaultFunc: schema.EnvDefaultFunc("ALICLOUD_REGION", os.Getenv("ALICLOUD_DEFAULT_REGION")),
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},
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"tablestore_endpoint": {
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Type: schema.TypeString,
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Optional: true,
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Description: "A custom endpoint for the TableStore API",
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DefaultFunc: schema.EnvDefaultFunc("ALICLOUD_TABLESTORE_ENDPOINT", ""),
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},
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"endpoint": {
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Type: schema.TypeString,
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Optional: true,
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Description: "A custom endpoint for the OSS API",
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DefaultFunc: schema.EnvDefaultFunc("ALICLOUD_OSS_ENDPOINT", os.Getenv("OSS_ENDPOINT")),
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},
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"bucket": &schema.Schema{
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Type: schema.TypeString,
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Required: true,
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Description: "The name of the OSS bucket",
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},
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"prefix": &schema.Schema{
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Type: schema.TypeString,
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Optional: true,
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Description: "The directory where state files will be saved inside the bucket",
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Default: "env:",
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ValidateFunc: func(v interface{}, s string) ([]string, []error) {
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prefix := v.(string)
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if strings.HasPrefix(prefix, "/") || strings.HasPrefix(prefix, "./") {
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return nil, []error{fmt.Errorf("workspace_key_prefix must not start with '/' or './'")}
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}
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return nil, nil
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},
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},
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"key": &schema.Schema{
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Type: schema.TypeString,
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Optional: true,
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Description: "The path of the state file inside the bucket",
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ValidateFunc: func(v interface{}, s string) ([]string, []error) {
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if strings.HasPrefix(v.(string), "/") || strings.HasSuffix(v.(string), "/") {
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return nil, []error{fmt.Errorf("key can not start and end with '/'")}
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}
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return nil, nil
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},
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Default: "terraform.tfstate",
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},
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"tablestore_table": {
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Type: schema.TypeString,
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Optional: true,
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Description: "TableStore table for state locking and consistency",
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Default: "",
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},
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"encrypt": &schema.Schema{
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Type: schema.TypeBool,
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Optional: true,
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Description: "Whether to enable server side encryption of the state file",
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Default: false,
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},
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"acl": &schema.Schema{
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Type: schema.TypeString,
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Optional: true,
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Description: "Object ACL to be applied to the state file",
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Default: "",
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ValidateFunc: func(v interface{}, k string) ([]string, []error) {
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if value := v.(string); value != "" {
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acls := oss.ACLType(value)
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if acls != oss.ACLPrivate && acls != oss.ACLPublicRead && acls != oss.ACLPublicReadWrite {
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return nil, []error{fmt.Errorf(
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"%q must be a valid ACL value , expected %s, %s or %s, got %q",
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k, oss.ACLPrivate, oss.ACLPublicRead, oss.ACLPublicReadWrite, acls)}
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}
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}
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return nil, nil
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},
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},
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"assume_role": assumeRoleSchema(),
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"shared_credentials_file": {
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Type: schema.TypeString,
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Optional: true,
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DefaultFunc: schema.EnvDefaultFunc("ALICLOUD_SHARED_CREDENTIALS_FILE", ""),
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Description: "This is the path to the shared credentials file. If this is not set and a profile is specified, `~/.aliyun/config.json` will be used.",
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},
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"profile": {
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Type: schema.TypeString,
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Optional: true,
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Description: "This is the Alibaba Cloud profile name as set in the shared credentials file. It can also be sourced from the `ALICLOUD_PROFILE` environment variable.",
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DefaultFunc: schema.EnvDefaultFunc("ALICLOUD_PROFILE", ""),
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},
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},
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}
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result := &Backend{Backend: s}
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result.Backend.ConfigureFunc = result.configure
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return result
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}
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func assumeRoleSchema() *schema.Schema {
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return &schema.Schema{
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Type: schema.TypeSet,
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Optional: true,
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MaxItems: 1,
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Elem: &schema.Resource{
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Schema: map[string]*schema.Schema{
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"role_arn": {
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Type: schema.TypeString,
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Required: true,
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Description: "The ARN of a RAM role to assume prior to making API calls.",
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DefaultFunc: schema.EnvDefaultFunc("ALICLOUD_ASSUME_ROLE_ARN", ""),
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},
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"session_name": {
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Type: schema.TypeString,
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Optional: true,
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Description: "The session name to use when assuming the role.",
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DefaultFunc: schema.EnvDefaultFunc("ALICLOUD_ASSUME_ROLE_SESSION_NAME", ""),
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},
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"policy": {
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Type: schema.TypeString,
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Optional: true,
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Description: "The permissions applied when assuming a role. You cannot use this policy to grant permissions which exceed those of the role that is being assumed.",
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},
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"session_expiration": {
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Type: schema.TypeInt,
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Optional: true,
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Description: "The time after which the established session for assuming role expires.",
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ValidateFunc: validation.IntBetween(900, 3600),
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},
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},
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},
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}
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}
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type Backend struct {
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*schema.Backend
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// The fields below are set from configure
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ossClient *oss.Client
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otsClient *tablestore.TableStoreClient
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bucketName string
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statePrefix string
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stateKey string
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serverSideEncryption bool
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acl string
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endpoint string
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otsEndpoint string
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otsTable string
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}
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func (b *Backend) configure(ctx context.Context) error {
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if b.ossClient != nil {
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return nil
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}
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// Grab the resource data
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d := schema.FromContextBackendConfig(ctx)
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b.bucketName = d.Get("bucket").(string)
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b.statePrefix = strings.TrimPrefix(strings.Trim(d.Get("prefix").(string), "/"), "./")
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b.stateKey = d.Get("key").(string)
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b.serverSideEncryption = d.Get("encrypt").(bool)
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b.acl = d.Get("acl").(string)
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var getBackendConfig = func(str string, key string) string {
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if str == "" {
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value, err := getConfigFromProfile(d, key)
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if err == nil && value != nil {
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str = value.(string)
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}
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}
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return str
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}
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accessKey := getBackendConfig(d.Get("access_key").(string), "access_key_id")
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secretKey := getBackendConfig(d.Get("secret_key").(string), "access_key_secret")
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securityToken := getBackendConfig(d.Get("security_token").(string), "sts_token")
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region := getBackendConfig(d.Get("region").(string), "region_id")
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endpoint := d.Get("endpoint").(string)
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schma := "https"
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roleArn := getBackendConfig("", "ram_role_arn")
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sessionName := getBackendConfig("", "ram_session_name")
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var policy string
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var sessionExpiration int
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expiredSeconds, err := getConfigFromProfile(d, "expired_seconds")
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if err == nil && expiredSeconds != nil {
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sessionExpiration = (int)(expiredSeconds.(float64))
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}
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if v, ok := d.GetOk("assume_role"); ok {
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for _, v := range v.(*schema.Set).List() {
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assumeRole := v.(map[string]interface{})
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if assumeRole["role_arn"].(string) != "" {
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roleArn = assumeRole["role_arn"].(string)
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}
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if assumeRole["session_name"].(string) != "" {
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sessionName = assumeRole["session_name"].(string)
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}
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if sessionName == "" {
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sessionName = "terraform"
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}
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policy = assumeRole["policy"].(string)
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sessionExpiration = assumeRole["session_expiration"].(int)
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if sessionExpiration == 0 {
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if v := os.Getenv("ALICLOUD_ASSUME_ROLE_SESSION_EXPIRATION"); v != "" {
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if expiredSeconds, err := strconv.Atoi(v); err == nil {
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sessionExpiration = expiredSeconds
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}
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}
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if sessionExpiration == 0 {
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sessionExpiration = 3600
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}
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}
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}
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}
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if accessKey == "" {
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ecsRoleName := getBackendConfig(d.Get("ecs_role_name").(string), "ram_role_name")
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subAccessKeyId, subAccessKeySecret, subSecurityToken, err := getAuthCredentialByEcsRoleName(ecsRoleName)
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if err != nil {
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return err
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}
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accessKey, secretKey, securityToken = subAccessKeyId, subAccessKeySecret, subSecurityToken
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}
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if roleArn != "" {
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subAccessKeyId, subAccessKeySecret, subSecurityToken, err := getAssumeRoleAK(accessKey, secretKey, securityToken, region, roleArn, sessionName, policy, sessionExpiration)
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if err != nil {
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return err
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}
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accessKey, secretKey, securityToken = subAccessKeyId, subAccessKeySecret, subSecurityToken
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}
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if endpoint == "" {
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endpointItem, _ := b.getOSSEndpointByRegion(accessKey, secretKey, securityToken, region)
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if endpointItem != nil && len(endpointItem.Endpoint) > 0 {
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if len(endpointItem.Protocols.Protocols) > 0 {
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// HTTP or HTTPS
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schma = strings.ToLower(endpointItem.Protocols.Protocols[0])
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for _, p := range endpointItem.Protocols.Protocols {
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if strings.ToLower(p) == "https" {
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schma = strings.ToLower(p)
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break
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}
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}
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}
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endpoint = endpointItem.Endpoint
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} else {
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endpoint = fmt.Sprintf("oss-%s.aliyuncs.com", region)
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}
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}
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if !strings.HasPrefix(endpoint, "http") {
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endpoint = fmt.Sprintf("%s://%s", schma, endpoint)
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}
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log.Printf("[DEBUG] Instantiate OSS client using endpoint: %#v", endpoint)
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var options []oss.ClientOption
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if securityToken != "" {
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options = append(options, oss.SecurityToken(securityToken))
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}
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options = append(options, oss.UserAgent(fmt.Sprintf("%s/%s", TerraformUA, TerraformVersion)))
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proxyUrl := getHttpProxyUrl()
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if proxyUrl != nil {
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options = append(options, oss.Proxy(proxyUrl.String()))
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}
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client, err := oss.New(endpoint, accessKey, secretKey, options...)
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b.ossClient = client
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otsEndpoint := d.Get("tablestore_endpoint").(string)
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if otsEndpoint != "" {
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if !strings.HasPrefix(otsEndpoint, "http") {
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otsEndpoint = fmt.Sprintf("%s://%s", schma, otsEndpoint)
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}
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b.otsEndpoint = otsEndpoint
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parts := strings.Split(strings.TrimPrefix(strings.TrimPrefix(otsEndpoint, "https://"), "http://"), ".")
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b.otsClient = tablestore.NewClientWithConfig(otsEndpoint, parts[0], accessKey, secretKey, securityToken, tablestore.NewDefaultTableStoreConfig())
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}
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b.otsTable = d.Get("tablestore_table").(string)
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return err
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}
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func (b *Backend) getOSSEndpointByRegion(access_key, secret_key, security_token, region string) (*location.DescribeEndpointResponse, error) {
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args := location.CreateDescribeEndpointRequest()
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args.ServiceCode = "oss"
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args.Id = region
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args.Domain = "location-readonly.aliyuncs.com"
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locationClient, err := location.NewClientWithOptions(region, getSdkConfig(), credentials.NewStsTokenCredential(access_key, secret_key, security_token))
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if err != nil {
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return nil, fmt.Errorf("Unable to initialize the location client: %#v", err)
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}
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locationClient.AppendUserAgent(TerraformUA, TerraformVersion)
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endpointsResponse, err := locationClient.DescribeEndpoint(args)
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if err != nil {
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return nil, fmt.Errorf("Describe oss endpoint using region: %#v got an error: %#v.", region, err)
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}
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return endpointsResponse, nil
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}
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func getAssumeRoleAK(accessKey, secretKey, stsToken, region, roleArn, sessionName, policy string, sessionExpiration int) (string, string, string, error) {
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request := sts.CreateAssumeRoleRequest()
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request.RoleArn = roleArn
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request.RoleSessionName = sessionName
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request.DurationSeconds = requests.NewInteger(sessionExpiration)
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request.Policy = policy
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request.Scheme = "https"
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var client *sts.Client
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var err error
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if stsToken == "" {
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client, err = sts.NewClientWithAccessKey(region, accessKey, secretKey)
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} else {
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client, err = sts.NewClientWithStsToken(region, accessKey, secretKey, stsToken)
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}
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if err != nil {
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return "", "", "", err
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}
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response, err := client.AssumeRole(request)
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if err != nil {
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return "", "", "", err
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}
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return response.Credentials.AccessKeyId, response.Credentials.AccessKeySecret, response.Credentials.SecurityToken, nil
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}
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func getSdkConfig() *sdk.Config {
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return sdk.NewConfig().
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WithMaxRetryTime(5).
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WithTimeout(time.Duration(30) * time.Second).
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WithGoRoutinePoolSize(10).
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WithDebug(false).
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WithHttpTransport(getTransport()).
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WithScheme("HTTPS")
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}
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func getTransport() *http.Transport {
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handshakeTimeout, err := strconv.Atoi(os.Getenv("TLSHandshakeTimeout"))
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if err != nil {
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handshakeTimeout = 120
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}
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transport := cleanhttp.DefaultTransport()
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transport.TLSHandshakeTimeout = time.Duration(handshakeTimeout) * time.Second
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transport.Proxy = http.ProxyFromEnvironment
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return transport
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}
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type Invoker struct {
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catchers []*Catcher
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}
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type Catcher struct {
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Reason string
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RetryCount int
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RetryWaitSeconds int
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}
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const TerraformUA = "HashiCorp-Terraform"
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var TerraformVersion = strings.TrimSuffix(version.String(), "-dev")
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var ClientErrorCatcher = Catcher{"AliyunGoClientFailure", 10, 3}
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var ServiceBusyCatcher = Catcher{"ServiceUnavailable", 10, 3}
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func NewInvoker() Invoker {
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i := Invoker{}
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i.AddCatcher(ClientErrorCatcher)
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i.AddCatcher(ServiceBusyCatcher)
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return i
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}
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func (a *Invoker) AddCatcher(catcher Catcher) {
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a.catchers = append(a.catchers, &catcher)
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}
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func (a *Invoker) Run(f func() error) error {
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err := f()
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if err == nil {
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return nil
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}
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for _, catcher := range a.catchers {
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if strings.Contains(err.Error(), catcher.Reason) {
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catcher.RetryCount--
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if catcher.RetryCount <= 0 {
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return fmt.Errorf("Retry timeout and got an error: %#v.", err)
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} else {
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time.Sleep(time.Duration(catcher.RetryWaitSeconds) * time.Second)
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return a.Run(f)
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}
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}
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}
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return err
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}
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var providerConfig map[string]interface{}
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func getConfigFromProfile(d *schema.ResourceData, ProfileKey string) (interface{}, error) {
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if providerConfig == nil {
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if v, ok := d.GetOk("profile"); !ok || v.(string) == "" {
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return nil, nil
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}
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current := d.Get("profile").(string)
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// Set CredsFilename, expanding home directory
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profilePath, err := homedir.Expand(d.Get("shared_credentials_file").(string))
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if err != nil {
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return nil, err
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}
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if profilePath == "" {
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profilePath = fmt.Sprintf("%s/.aliyun/config.json", os.Getenv("HOME"))
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if runtime.GOOS == "windows" {
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profilePath = fmt.Sprintf("%s/.aliyun/config.json", os.Getenv("USERPROFILE"))
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}
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}
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providerConfig = make(map[string]interface{})
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_, err = os.Stat(profilePath)
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if !os.IsNotExist(err) {
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data, err := ioutil.ReadFile(profilePath)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
config := map[string]interface{}{}
|
|
err = json.Unmarshal(data, &config)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
for _, v := range config["profiles"].([]interface{}) {
|
|
if current == v.(map[string]interface{})["name"] {
|
|
providerConfig = v.(map[string]interface{})
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
mode := ""
|
|
if v, ok := providerConfig["mode"]; ok {
|
|
mode = v.(string)
|
|
} else {
|
|
return v, nil
|
|
}
|
|
switch ProfileKey {
|
|
case "access_key_id", "access_key_secret":
|
|
if mode == "EcsRamRole" {
|
|
return "", nil
|
|
}
|
|
case "ram_role_name":
|
|
if mode != "EcsRamRole" {
|
|
return "", nil
|
|
}
|
|
case "sts_token":
|
|
if mode != "StsToken" {
|
|
return "", nil
|
|
}
|
|
case "ram_role_arn", "ram_session_name":
|
|
if mode != "RamRoleArn" {
|
|
return "", nil
|
|
}
|
|
case "expired_seconds":
|
|
if mode != "RamRoleArn" {
|
|
return float64(0), nil
|
|
}
|
|
}
|
|
|
|
return providerConfig[ProfileKey], nil
|
|
}
|
|
|
|
var securityCredURL = "http://100.100.100.200/latest/meta-data/ram/security-credentials/"
|
|
|
|
// getAuthCredentialByEcsRoleName aims to access meta to get sts credential
|
|
// Actually, the job should be done by sdk, but currently not all resources and products support alibaba-cloud-sdk-go,
|
|
// and their go sdk does support ecs role name.
|
|
// This method is a temporary solution and it should be removed after all go sdk support ecs role name
|
|
// The related PR: https://github.com/terraform-providers/terraform-provider-alicloud/pull/731
|
|
func getAuthCredentialByEcsRoleName(ecsRoleName string) (accessKey, secretKey, token string, err error) {
|
|
|
|
if ecsRoleName == "" {
|
|
return
|
|
}
|
|
requestUrl := securityCredURL + ecsRoleName
|
|
httpRequest, err := http.NewRequest(requests.GET, requestUrl, strings.NewReader(""))
|
|
if err != nil {
|
|
err = fmt.Errorf("build sts requests err: %s", err.Error())
|
|
return
|
|
}
|
|
httpClient := &http.Client{}
|
|
httpResponse, err := httpClient.Do(httpRequest)
|
|
if err != nil {
|
|
err = fmt.Errorf("get Ecs sts token err : %s", err.Error())
|
|
return
|
|
}
|
|
|
|
response := responses.NewCommonResponse()
|
|
err = responses.Unmarshal(response, httpResponse, "")
|
|
if err != nil {
|
|
err = fmt.Errorf("Unmarshal Ecs sts token response err : %s", err.Error())
|
|
return
|
|
}
|
|
|
|
if response.GetHttpStatus() != http.StatusOK {
|
|
err = fmt.Errorf("get Ecs sts token err, httpStatus: %d, message = %s", response.GetHttpStatus(), response.GetHttpContentString())
|
|
return
|
|
}
|
|
var data interface{}
|
|
err = json.Unmarshal(response.GetHttpContentBytes(), &data)
|
|
if err != nil {
|
|
err = fmt.Errorf("refresh Ecs sts token err, json.Unmarshal fail: %s", err.Error())
|
|
return
|
|
}
|
|
code, err := jmespath.Search("Code", data)
|
|
if err != nil {
|
|
err = fmt.Errorf("refresh Ecs sts token err, fail to get Code: %s", err.Error())
|
|
return
|
|
}
|
|
if code.(string) != "Success" {
|
|
err = fmt.Errorf("refresh Ecs sts token err, Code is not Success")
|
|
return
|
|
}
|
|
accessKeyId, err := jmespath.Search("AccessKeyId", data)
|
|
if err != nil {
|
|
err = fmt.Errorf("refresh Ecs sts token err, fail to get AccessKeyId: %s", err.Error())
|
|
return
|
|
}
|
|
accessKeySecret, err := jmespath.Search("AccessKeySecret", data)
|
|
if err != nil {
|
|
err = fmt.Errorf("refresh Ecs sts token err, fail to get AccessKeySecret: %s", err.Error())
|
|
return
|
|
}
|
|
securityToken, err := jmespath.Search("SecurityToken", data)
|
|
if err != nil {
|
|
err = fmt.Errorf("refresh Ecs sts token err, fail to get SecurityToken: %s", err.Error())
|
|
return
|
|
}
|
|
|
|
if accessKeyId == nil || accessKeySecret == nil || securityToken == nil {
|
|
err = fmt.Errorf("there is no any available accesskey, secret and security token for Ecs role %s", ecsRoleName)
|
|
return
|
|
}
|
|
|
|
return accessKeyId.(string), accessKeySecret.(string), securityToken.(string), nil
|
|
}
|
|
|
|
func getHttpProxyUrl() *url.URL {
|
|
for _, v := range []string{"HTTPS_PROXY", "https_proxy", "HTTP_PROXY", "http_proxy"} {
|
|
value := strings.Trim(os.Getenv(v), " ")
|
|
if value != "" {
|
|
if !regexp.MustCompile(`^http(s)?://`).MatchString(value) {
|
|
value = fmt.Sprintf("https://%s", value)
|
|
}
|
|
proxyUrl, err := url.Parse(value)
|
|
if err == nil {
|
|
return proxyUrl
|
|
}
|
|
break
|
|
}
|
|
}
|
|
return nil
|
|
}
|