feat: reimplement influx backup using new APIs (#116)

api/client.gen.go

@@ -558,7 +558,11 @@ func strlen(s string) int {
 type GenericOpenAPIError struct {
 	body  []byte
 	error string
-	model error
+	model ApiError
+}
+
+func (e GenericOpenAPIError) Body() []byte {
+	return e.body
 }
 
 // Error returns non-empty string if there was an error.
@@ -569,12 +573,14 @@ func (e GenericOpenAPIError) Error() string {
 	return e.error
 }
 
-// Body returns the raw bytes of the response
-func (e GenericOpenAPIError) Body() []byte {
-	return e.body
-}
-
 // Model returns the unpacked model of the error
-func (e GenericOpenAPIError) Model() interface{} {
+func (e GenericOpenAPIError) Model() ApiError {
 	return e.model
 }
+
+func (e GenericOpenAPIError) ErrorCode() ErrorCode {
+	if e.model == nil {
+		return ERRORCODE_INTERNAL_ERROR
+	}
+	return e.model.ErrorCode()
+}

api/contract/cli.yml

@@ -149,8 +149,12 @@ components:
       $ref: "./openapi/src/common/schemas/WritePrecision.yml"
     LineProtocolError:
       $ref: "./openapi/src/common/schemas/LineProtocolError.yml"
+    LineProtocolErrorCode:
+      $ref: "./openapi/src/common/schemas/LineProtocolErrorCode.yml"
     LineProtocolLengthError:
       $ref: "./openapi/src/common/schemas/LineProtocolLengthError.yml"
+    LineProtocolLengthErrorCode:
+      $ref: "./openapi/src/common/schemas/LineProtocolLengthErrorCode.yml"
     SchemaType:
       $ref: "./openapi/src/common/schemas/SchemaType.yml"
     ColumnDataType:

api/contract/openapi

@@ -1 +1 @@
-Subproject commit f5b7af45fce2cfd074ba97bcafe907cba5f66d7f
+Subproject commit 3d27d5c5b8d28a20607fe68f50e98e067e7e3371

api/error.go

@@ -5,6 +5,11 @@ import (
 	"strings"
 )
 
+type ApiError interface {
+	error
+	ErrorCode() ErrorCode
+}
+
 // Extensions to let our API error types be used as "standard" errors.
 
 func (o *Error) Error() string {
@@ -22,6 +27,10 @@ func (o *Error) Error() string {
 	return fmt.Sprintf("<%s>", o.Code)
 }
 
+func (o *Error) ErrorCode() ErrorCode {
+	return o.Code
+}
+
 func (o *HealthCheck) Error() string {
 	if o.Status == HEALTHCHECKSTATUS_PASS {
 		// Make sure we aren't misusing HealthCheck responses.
@@ -36,10 +45,47 @@ func (o *HealthCheck) Error() string {
 	return fmt.Sprintf("health check failed: %s", message)
 }
 
+func (o *HealthCheck) ErrorCode() ErrorCode {
+	if o.Status == HEALTHCHECKSTATUS_PASS {
+		// Make sure we aren't misusing HealthCheck responses.
+		panic("successful healthcheck used as an error!")
+	}
+
+	return ERRORCODE_INTERNAL_ERROR
+}
+
 func (o *LineProtocolError) Error() string {
 	return o.Message
 }
 
+func (o *LineProtocolError) ErrorCode() ErrorCode {
+	switch o.Code {
+	case LINEPROTOCOLERRORCODE_CONFLICT:
+		return ERRORCODE_CONFLICT
+	case LINEPROTOCOLERRORCODE_EMPTY_VALUE:
+		return ERRORCODE_EMPTY_VALUE
+	case LINEPROTOCOLERRORCODE_NOT_FOUND:
+		return ERRORCODE_NOT_FOUND
+	case LINEPROTOCOLERRORCODE_UNAVAILABLE:
+		return ERRORCODE_UNAVAILABLE
+	case LINEPROTOCOLERRORCODE_INTERNAL_ERROR:
+		return ERRORCODE_INTERNAL_ERROR
+	case LINEPROTOCOLERRORCODE_INVALID:
+		fallthrough
+	default:
+		return ERRORCODE_INVALID
+	}
+}
+
 func (o *LineProtocolLengthError) Error() string {
 	return o.Message
 }
+
+func (o *LineProtocolLengthError) ErrorCode() ErrorCode {
+	switch o.Code {
+	case LINEPROTOCOLLENGTHERRORCODE_INVALID:
+		fallthrough
+	default:
+		return ERRORCODE_INVALID
+	}
+}

api/model_line_protocol_error.gen.go

@@ -16,8 +16,7 @@ import (
 
 // LineProtocolError struct for LineProtocolError
 type LineProtocolError struct {
-	// Code is the machine-readable error code.
-	Code string `json:"code"`
+	Code LineProtocolErrorCode `json:"code"`
 	// Message is a human-readable message.
 	Message string `json:"message"`
 	// Op describes the logical code operation during error. Useful for debugging.
@@ -32,7 +31,7 @@ type LineProtocolError struct {
 // This constructor will assign default values to properties that have it defined,
 // and makes sure properties required by API are set, but the set of arguments
 // will change when the set of required properties is changed
-func NewLineProtocolError(code string, message string, op string, err string) *LineProtocolError {
+func NewLineProtocolError(code LineProtocolErrorCode, message string, op string, err string) *LineProtocolError {
 	this := LineProtocolError{}
 	this.Code = code
 	this.Message = message
@@ -50,9 +49,9 @@ func NewLineProtocolErrorWithDefaults() *LineProtocolError {
 }
 
 // GetCode returns the Code field value
-func (o *LineProtocolError) GetCode() string {
+func (o *LineProtocolError) GetCode() LineProtocolErrorCode {
 	if o == nil {
-		var ret string
+		var ret LineProtocolErrorCode
 		return ret
 	}
 
@@ -61,7 +60,7 @@ func (o *LineProtocolError) GetCode() string {
 
 // GetCodeOk returns a tuple with the Code field value
 // and a boolean to check if the value has been set.
-func (o *LineProtocolError) GetCodeOk() (*string, bool) {
+func (o *LineProtocolError) GetCodeOk() (*LineProtocolErrorCode, bool) {
 	if o == nil {
 		return nil, false
 	}
@@ -69,7 +68,7 @@ func (o *LineProtocolError) GetCodeOk() (*string, bool) {
 }
 
 // SetCode sets field value
-func (o *LineProtocolError) SetCode(v string) {
+func (o *LineProtocolError) SetCode(v LineProtocolErrorCode) {
 	o.Code = v
 }
 

api/model_line_protocol_error_code.gen.go

@@ -0,0 +1,87 @@
+/*
+ * Subset of Influx API covered by Influx CLI
+ *
+ * No description provided (generated by Openapi Generator https://github.com/openapitools/openapi-generator)
+ *
+ * API version: 2.0.0
+ */
+
+// Code generated by OpenAPI Generator (https://openapi-generator.tech); DO NOT EDIT.
+
+package api
+
+import (
+	"encoding/json"
+	"fmt"
+)
+
+// LineProtocolErrorCode Code is the machine-readable error code.
+type LineProtocolErrorCode string
+
+// List of LineProtocolErrorCode
+const (
+	LINEPROTOCOLERRORCODE_INTERNAL_ERROR LineProtocolErrorCode = "internal error"
+	LINEPROTOCOLERRORCODE_NOT_FOUND      LineProtocolErrorCode = "not found"
+	LINEPROTOCOLERRORCODE_CONFLICT       LineProtocolErrorCode = "conflict"
+	LINEPROTOCOLERRORCODE_INVALID        LineProtocolErrorCode = "invalid"
+	LINEPROTOCOLERRORCODE_EMPTY_VALUE    LineProtocolErrorCode = "empty value"
+	LINEPROTOCOLERRORCODE_UNAVAILABLE    LineProtocolErrorCode = "unavailable"
+)
+
+func (v *LineProtocolErrorCode) UnmarshalJSON(src []byte) error {
+	var value string
+	err := json.Unmarshal(src, &value)
+	if err != nil {
+		return err
+	}
+	enumTypeValue := LineProtocolErrorCode(value)
+	for _, existing := range []LineProtocolErrorCode{"internal error", "not found", "conflict", "invalid", "empty value", "unavailable"} {
+		if existing == enumTypeValue {
+			*v = enumTypeValue
+			return nil
+		}
+	}
+
+	return fmt.Errorf("%+v is not a valid LineProtocolErrorCode", value)
+}
+
+// Ptr returns reference to LineProtocolErrorCode value
+func (v LineProtocolErrorCode) Ptr() *LineProtocolErrorCode {
+	return &v
+}
+
+type NullableLineProtocolErrorCode struct {
+	value *LineProtocolErrorCode
+	isSet bool
+}
+
+func (v NullableLineProtocolErrorCode) Get() *LineProtocolErrorCode {
+	return v.value
+}
+
+func (v *NullableLineProtocolErrorCode) Set(val *LineProtocolErrorCode) {
+	v.value = val
+	v.isSet = true
+}
+
+func (v NullableLineProtocolErrorCode) IsSet() bool {
+	return v.isSet
+}
+
+func (v *NullableLineProtocolErrorCode) Unset() {
+	v.value = nil
+	v.isSet = false
+}
+
+func NewNullableLineProtocolErrorCode(val *LineProtocolErrorCode) *NullableLineProtocolErrorCode {
+	return &NullableLineProtocolErrorCode{value: val, isSet: true}
+}
+
+func (v NullableLineProtocolErrorCode) MarshalJSON() ([]byte, error) {
+	return json.Marshal(v.value)
+}
+
+func (v *NullableLineProtocolErrorCode) UnmarshalJSON(src []byte) error {
+	v.isSet = true
+	return json.Unmarshal(src, &v.value)
+}

api/model_line_protocol_length_error.gen.go

@@ -16,8 +16,7 @@ import (
 
 // LineProtocolLengthError struct for LineProtocolLengthError
 type LineProtocolLengthError struct {
-	// Code is the machine-readable error code.
-	Code string `json:"code"`
+	Code LineProtocolLengthErrorCode `json:"code"`
 	// Message is a human-readable message.
 	Message string `json:"message"`
 	// Max length in bytes for a body of line-protocol.
@@ -28,7 +27,7 @@ type LineProtocolLengthError struct {
 // This constructor will assign default values to properties that have it defined,
 // and makes sure properties required by API are set, but the set of arguments
 // will change when the set of required properties is changed
-func NewLineProtocolLengthError(code string, message string, maxLength int32) *LineProtocolLengthError {
+func NewLineProtocolLengthError(code LineProtocolLengthErrorCode, message string, maxLength int32) *LineProtocolLengthError {
 	this := LineProtocolLengthError{}
 	this.Code = code
 	this.Message = message
@@ -45,9 +44,9 @@ func NewLineProtocolLengthErrorWithDefaults() *LineProtocolLengthError {
 }
 
 // GetCode returns the Code field value
-func (o *LineProtocolLengthError) GetCode() string {
+func (o *LineProtocolLengthError) GetCode() LineProtocolLengthErrorCode {
 	if o == nil {
-		var ret string
+		var ret LineProtocolLengthErrorCode
 		return ret
 	}
 
@@ -56,7 +55,7 @@ func (o *LineProtocolLengthError) GetCode() string {
 
 // GetCodeOk returns a tuple with the Code field value
 // and a boolean to check if the value has been set.
-func (o *LineProtocolLengthError) GetCodeOk() (*string, bool) {
+func (o *LineProtocolLengthError) GetCodeOk() (*LineProtocolLengthErrorCode, bool) {
 	if o == nil {
 		return nil, false
 	}
@@ -64,7 +63,7 @@ func (o *LineProtocolLengthError) GetCodeOk() (*string, bool) {
 }
 
 // SetCode sets field value
-func (o *LineProtocolLengthError) SetCode(v string) {
+func (o *LineProtocolLengthError) SetCode(v LineProtocolLengthErrorCode) {
 	o.Code = v
 }
 

api/model_line_protocol_length_error_code.gen.go

@@ -0,0 +1,82 @@
+/*
+ * Subset of Influx API covered by Influx CLI
+ *
+ * No description provided (generated by Openapi Generator https://github.com/openapitools/openapi-generator)
+ *
+ * API version: 2.0.0
+ */
+
+// Code generated by OpenAPI Generator (https://openapi-generator.tech); DO NOT EDIT.
+
+package api
+
+import (
+	"encoding/json"
+	"fmt"
+)
+
+// LineProtocolLengthErrorCode Code is the machine-readable error code.
+type LineProtocolLengthErrorCode string
+
+// List of LineProtocolLengthErrorCode
+const (
+	LINEPROTOCOLLENGTHERRORCODE_INVALID LineProtocolLengthErrorCode = "invalid"
+)
+
+func (v *LineProtocolLengthErrorCode) UnmarshalJSON(src []byte) error {
+	var value string
+	err := json.Unmarshal(src, &value)
+	if err != nil {
+		return err
+	}
+	enumTypeValue := LineProtocolLengthErrorCode(value)
+	for _, existing := range []LineProtocolLengthErrorCode{"invalid"} {
+		if existing == enumTypeValue {
+			*v = enumTypeValue
+			return nil
+		}
+	}
+
+	return fmt.Errorf("%+v is not a valid LineProtocolLengthErrorCode", value)
+}
+
+// Ptr returns reference to LineProtocolLengthErrorCode value
+func (v LineProtocolLengthErrorCode) Ptr() *LineProtocolLengthErrorCode {
+	return &v
+}
+
+type NullableLineProtocolLengthErrorCode struct {
+	value *LineProtocolLengthErrorCode
+	isSet bool
+}
+
+func (v NullableLineProtocolLengthErrorCode) Get() *LineProtocolLengthErrorCode {
+	return v.value
+}
+
+func (v *NullableLineProtocolLengthErrorCode) Set(val *LineProtocolLengthErrorCode) {
+	v.value = val
+	v.isSet = true
+}
+
+func (v NullableLineProtocolLengthErrorCode) IsSet() bool {
+	return v.isSet
+}
+
+func (v *NullableLineProtocolLengthErrorCode) Unset() {
+	v.value = nil
+	v.isSet = false
+}
+
+func NewNullableLineProtocolLengthErrorCode(val *LineProtocolLengthErrorCode) *NullableLineProtocolLengthErrorCode {
+	return &NullableLineProtocolLengthErrorCode{value: val, isSet: true}
+}
+
+func (v NullableLineProtocolLengthErrorCode) MarshalJSON() ([]byte, error) {
+	return json.Marshal(v.value)
+}
+
+func (v *NullableLineProtocolLengthErrorCode) UnmarshalJSON(src []byte) error {
+	v.isSet = true
+	return json.Unmarshal(src, &v.value)
+}

api/templates/client.mustache

@@ -307,13 +307,13 @@ func (c *APIClient) prepareRequest(
 
 	// Generate a new request
 	if body != nil {
-        var b io.Reader = body
-        if enc, ok := headerParams["Content-Encoding"]; ok && enc == "gzip" {
-            b, err = compressWithGzip(b)
-            if err != nil {
-                return nil, err
-            }
-        }
+		var b io.Reader = body
+		if enc, ok := headerParams["Content-Encoding"]; ok && enc == "gzip" {
+			b, err = compressWithGzip(b)
+			if err != nil {
+				return nil, err
+			}
+		}
 		localVarRequest, err = http.NewRequest(method, url.String(), b)
 	} else {
 		localVarRequest, err = http.NewRequest(method, url.String(), nil)
@@ -486,17 +486,17 @@ func setBody(body interface{}, contentType string) (bodyBuf *bytes.Buffer, err e
 }
 
 func compressWithGzip(data io.Reader) (io.Reader, error) {
-    pr, pw := io.Pipe()
-    gw := gzip.NewWriter(pw)
-    var err error
+	pr, pw := io.Pipe()
+	gw := gzip.NewWriter(pw)
+	var err error
 
-    go func() {
-        _, err = io.Copy(gw, data)
-        gw.Close()
-        pw.Close()
-    }()
+	go func() {
+		_, err = io.Copy(gw, data)
+		gw.Close()
+		pw.Close()
+	}()
 
-    return pr, err
+	return pr, err
 }
 
 // detectContentType method is used to figure out `Request.Body` content type for request header
@@ -576,25 +576,31 @@ func strlen(s string) int {
 
 // GenericOpenAPIError Provides access to the body, error and model on returned errors.
 type GenericOpenAPIError struct {
-	body  []byte
+	body []byte
 	error string
-	model error
+	model ApiError
 }
 
-// Error returns non-empty string if there was an error.
-func (e GenericOpenAPIError) Error() string {
-    if e.model != nil {
-        return e.model.Error()
-    }
-    return e.error
-}
-
-// Body returns the raw bytes of the response
 func (e GenericOpenAPIError) Body() []byte {
 	return e.body
 }
 
+// Error returns non-empty string if there was an error.
+func (e GenericOpenAPIError) Error() string {
+	if e.model != nil {
+		return e.model.Error()
+	}
+	return e.error
+}
+
 // Model returns the unpacked model of the error
-func (e GenericOpenAPIError) Model() interface{} {
+func (e GenericOpenAPIError) Model() ApiError {
 	return e.model
 }
+
+func (e GenericOpenAPIError) ErrorCode() ErrorCode {
+	if e.model == nil {
+		return ERRORCODE_INTERNAL_ERROR
+	}
+	return e.model.ErrorCode()
+}

clients/backup/backup.go

@@ -0,0 +1,283 @@
+package backup
+
+import (
+	"compress/gzip"
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"log"
+	"mime"
+	"mime/multipart"
+	"os"
+	"path/filepath"
+	"time"
+
+	"github.com/influxdata/influx-cli/v2/api"
+	"github.com/influxdata/influx-cli/v2/clients"
+)
+
+type Client struct {
+	clients.CLI
+	api.BackupApi
+
+	// Local state tracked across steps in the backup process.
+	baseName       string
+	bucketMetadata []api.BucketMetadataManifest
+	manifest       Manifest
+}
+
+type Params struct {
+	// Organization containing TSM data to back up.
+	// If not set, all orgs will be included.
+	OrgID string
+	Org   string
+
+	// Bucket containing TSM data to back up.
+	// If not set, all buckets within the org filter will be included.
+	BucketID string
+	Bucket   string
+
+	// Path to the directory where backup files should be written.
+	Path string
+
+	// Compression to use for local copies of snapshot files.
+	Compression FileCompression
+}
+
+func (p *Params) matches(bkt api.BucketMetadataManifest) bool {
+	if p.OrgID != "" && bkt.OrganizationID != p.OrgID {
+		return false
+	}
+	if p.Org != "" && bkt.OrganizationName != p.Org {
+		return false
+	}
+	if p.BucketID != "" && bkt.BucketID != p.BucketID {
+		return false
+	}
+	if p.Bucket != "" && bkt.BucketName != p.Bucket {
+		return false
+	}
+	return true
+}
+
+const backupFilenamePattern = "20060102T150405Z"
+
+func (c *Client) Backup(ctx context.Context, params *Params) error {
+	if err := os.MkdirAll(params.Path, 0777); err != nil {
+		return err
+	}
+	c.baseName = time.Now().UTC().Format(backupFilenamePattern)
+
+	if err := c.downloadMetadata(ctx, params); err != nil {
+		return fmt.Errorf("failed to backup metadata: %w", err)
+	}
+	if err := c.downloadBucketData(ctx, params); err != nil {
+		return fmt.Errorf("failed to backup bucket data: %w", err)
+	}
+	if err := c.writeManifest(params); err != nil {
+		return fmt.Errorf("failed to write backup manifest: %w", err)
+	}
+	return nil
+}
+
+// downloadMetadata downloads a snapshot of the KV store, SQL DB, and bucket
+// manifests from the server. KV and SQL are written to local files. Bucket manifests
+// are parsed into a slice for additional processing.
+func (c *Client) downloadMetadata(ctx context.Context, params *Params) error {
+	log.Println("INFO: Downloading metadata snapshot")
+	rawResp, err := c.GetBackupMetadata(ctx).AcceptEncoding("gzip").Execute()
+	if err != nil {
+		return fmt.Errorf("failed to download metadata snapshot: %w", err)
+	}
+
+	kvName := fmt.Sprintf("%s.bolt", c.baseName)
+	sqlName := fmt.Sprintf("%s.sqlite", c.baseName)
+
+	_, contentParams, err := mime.ParseMediaType(rawResp.Header.Get("Content-Type"))
+	if err != nil {
+		return err
+	}
+	body, err := api.GunzipIfNeeded(rawResp)
+	if err != nil {
+		return err
+	}
+	defer body.Close()
+
+	writeFile := func(from io.Reader, to string) (ManifestFileEntry, error) {
+		toPath := filepath.Join(params.Path, to)
+		if params.Compression == GzipCompression {
+			toPath = toPath + ".gz"
+		}
+
+		// Closure here so we can clean up file resources via `defer` without
+		// returning from the whole function.
+		if err := func() error {
+			out, err := os.OpenFile(toPath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
+			if err != nil {
+				return err
+			}
+			defer out.Close()
+
+			var outW io.Writer = out
+			if params.Compression == GzipCompression {
+				gw := gzip.NewWriter(out)
+				defer gw.Close()
+				outW = gw
+			}
+
+			_, err = io.Copy(outW, from)
+			return err
+		}(); err != nil {
+			return ManifestFileEntry{}, err
+		}
+
+		fi, err := os.Stat(toPath)
+		if err != nil {
+			return ManifestFileEntry{}, err
+		}
+		return ManifestFileEntry{
+			FileName:    fi.Name(),
+			Size:        fi.Size(),
+			Compression: params.Compression,
+		}, nil
+	}
+
+	mr := multipart.NewReader(body, contentParams["boundary"])
+	for {
+		part, err := mr.NextPart()
+		if err == io.EOF {
+			break
+		} else if err != nil {
+			return err
+		}
+
+		_, partParams, err := mime.ParseMediaType(part.Header.Get("Content-Disposition"))
+		if err != nil {
+			return err
+		}
+		switch name := partParams["name"]; name {
+		case "kv":
+			fi, err := writeFile(part, kvName)
+			if err != nil {
+				return fmt.Errorf("failed to save local copy of KV backup to %q: %w", kvName, err)
+			}
+			c.manifest.KV = fi
+		case "sql":
+			fi, err := writeFile(part, sqlName)
+			if err != nil {
+				return fmt.Errorf("failed to save local copy of SQL backup to %q: %w", sqlName, err)
+			}
+			c.manifest.SQL = fi
+		case "buckets":
+			if err := json.NewDecoder(part).Decode(&c.bucketMetadata); err != nil {
+				return fmt.Errorf("failed to decode bucket manifest from backup: %w", err)
+			}
+		default:
+			return fmt.Errorf("response contained unexpected part %q", name)
+		}
+	}
+	return nil
+}
+
+// downloadBucketData downloads TSM snapshots for each shard in the buckets matching
+// the filter parameters provided over the CLI. Snapshots are written to local files.
+//
+// Bucket metadata must be pre-seeded via downloadMetadata before this method is called.
+func (c *Client) downloadBucketData(ctx context.Context, params *Params) error {
+	c.manifest.Buckets = make([]ManifestBucketEntry, 0, len(c.bucketMetadata))
+	for _, b := range c.bucketMetadata {
+		if !params.matches(b) {
+			continue
+		}
+		bktManifest, err := ConvertBucketManifest(b, func(shardId int64) (*ManifestFileEntry, error) {
+			return c.downloadShardData(ctx, params, shardId)
+		})
+		if err != nil {
+			return err
+		}
+		c.manifest.Buckets = append(c.manifest.Buckets, bktManifest)
+	}
+	return nil
+}
+
+// downloadShardData downloads the TSM snapshot for a single shard. The snapshot is written
+// to a local file, and its metadata is returned for aggregation.
+func (c Client) downloadShardData(ctx context.Context, params *Params, shardId int64) (*ManifestFileEntry, error) {
+	log.Printf("INFO: Backing up TSM for shard %d", shardId)
+	res, err := c.GetBackupShardId(ctx, shardId).AcceptEncoding("gzip").Execute()
+	if err != nil {
+		if apiError, ok := err.(api.ApiError); ok {
+			if apiError.ErrorCode() == api.ERRORCODE_NOT_FOUND {
+				log.Printf("WARN: Shard %d removed during backup", shardId)
+				return nil, nil
+			}
+		}
+		return nil, err
+	}
+	defer res.Body.Close()
+
+	fileName := fmt.Sprintf("%s.%d.tar", c.baseName, shardId)
+	if params.Compression == GzipCompression {
+		fileName = fileName + ".gz"
+	}
+	path := filepath.Join(params.Path, fileName)
+
+	// Closure here so we can clean up file resources via `defer` without
+	// returning from the whole function.
+	if err := func() error {
+		f, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
+		if err != nil {
+			return err
+		}
+		defer f.Close()
+
+		var inR io.Reader = res.Body
+		var outW io.Writer = f
+
+		// Make sure the locally-written data is compressed according to the user's request.
+		if params.Compression == GzipCompression && res.Header.Get("Content-Encoding") != "gzip" {
+			gzw := gzip.NewWriter(outW)
+			defer gzw.Close()
+			outW = gzw
+		}
+		if params.Compression == NoCompression && res.Header.Get("Content-Encoding") == "gzip" {
+			gzr, err := gzip.NewReader(inR)
+			if err != nil {
+				return err
+			}
+			defer gzr.Close()
+			inR = gzr
+		}
+
+		_, err = io.Copy(outW, inR)
+		return err
+	}(); err != nil {
+		return nil, err
+	}
+
+	fi, err := os.Stat(path)
+	if err != nil {
+		return nil, err
+	}
+	return &ManifestFileEntry{
+		FileName:    fi.Name(),
+		Size:        fi.Size(),
+		Compression: params.Compression,
+	}, nil
+}
+
+// writeManifest writes a description of all files downloaded as part of the backup process
+// to the backup folder, encoded as JSON.
+func (c Client) writeManifest(params *Params) error {
+	manifestPath := filepath.Join(params.Path, fmt.Sprintf("%s.manifest", c.baseName))
+	f, err := os.OpenFile(manifestPath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
+	if err != nil {
+		return err
+	}
+	defer f.Close()
+
+	enc := json.NewEncoder(f)
+	enc.SetIndent("", "  ")
+	return enc.Encode(c.manifest)
+}

clients/backup/backup_internal_test.go

@@ -0,0 +1,355 @@
+package backup
+
+import (
+	"bytes"
+	"compress/gzip"
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"log"
+	"mime/multipart"
+	"net/http"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/golang/mock/gomock"
+	"github.com/influxdata/influx-cli/v2/api"
+	"github.com/influxdata/influx-cli/v2/clients"
+	"github.com/influxdata/influx-cli/v2/internal/mock"
+	"github.com/stretchr/testify/require"
+)
+
+func TestBackup_DownloadMetadata(t *testing.T) {
+	t.Parallel()
+
+	fakeKV := strings.Repeat("I'm the bolt DB\n", 1234)
+	fakeSQL := strings.Repeat("I'm the SQL!\n", 1234)
+
+	bucketMetadata := []api.BucketMetadataManifest{
+		{
+			OrganizationID:         "123",
+			OrganizationName:       "org",
+			BucketID:               "456",
+			BucketName:             "bucket1",
+			DefaultRetentionPolicy: "foo",
+			RetentionPolicies: []api.RetentionPolicyManifest{
+				{Name: "foo"},
+				{Name: "bar"},
+			},
+		},
+		{
+			OrganizationID:         "123",
+			OrganizationName:       "org",
+			BucketID:               "789",
+			BucketName:             "bucket2",
+			DefaultRetentionPolicy: "baz",
+			RetentionPolicies: []api.RetentionPolicyManifest{
+				{Name: "qux"},
+				{Name: "baz"},
+			},
+		},
+	}
+
+	testCases := []struct {
+		name                string
+		compression         FileCompression
+		responseCompression FileCompression
+	}{
+		{
+			name:                "no gzip",
+			compression:         NoCompression,
+			responseCompression: NoCompression,
+		},
+		{
+			name:                "response gzip, no local gzip",
+			compression:         NoCompression,
+			responseCompression: GzipCompression,
+		},
+		{
+			name:                "no response gzip, local gzip",
+			compression:         GzipCompression,
+			responseCompression: NoCompression,
+		},
+		{
+			name:                "all gzip",
+			compression:         GzipCompression,
+			responseCompression: GzipCompression,
+		},
+	}
+
+	for _, tc := range testCases {
+		tc := tc
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+
+			ctrl := gomock.NewController(t)
+
+			backupApi := mock.NewMockBackupApi(ctrl)
+			backupApi.EXPECT().GetBackupMetadata(gomock.Any()).
+				Return(api.ApiGetBackupMetadataRequest{ApiService: backupApi})
+			backupApi.EXPECT().GetBackupMetadataExecute(gomock.Any()).
+				DoAndReturn(func(request api.ApiGetBackupMetadataRequest) (*http.Response, error) {
+					out := bytes.Buffer{}
+					var outW io.Writer = &out
+					if tc.responseCompression == GzipCompression {
+						gzw := gzip.NewWriter(outW)
+						defer gzw.Close()
+						outW = gzw
+					}
+
+					parts := []struct {
+						name        string
+						contentType string
+						writeFn     func(io.Writer) error
+					}{
+						{
+							name:        "kv",
+							contentType: "application/octet-stream",
+							writeFn: func(w io.Writer) error {
+								_, err := w.Write([]byte(fakeKV))
+								return err
+							},
+						},
+						{
+							name:        "sql",
+							contentType: "application/octet-stream",
+							writeFn: func(w io.Writer) error {
+								_, err := w.Write([]byte(fakeSQL))
+								return err
+							},
+						},
+						{
+							name:        "buckets",
+							contentType: "application/json",
+							writeFn: func(w io.Writer) error {
+								enc := json.NewEncoder(w)
+								return enc.Encode(bucketMetadata)
+							},
+						},
+					}
+
+					writer := multipart.NewWriter(outW)
+					for _, part := range parts {
+						pw, err := writer.CreatePart(map[string][]string{
+							"Content-Type":        {part.contentType},
+							"Content-Disposition": {fmt.Sprintf("attachment; name=%s", part.name)},
+						})
+						require.NoError(t, err)
+						require.NoError(t, part.writeFn(pw))
+					}
+					require.NoError(t, writer.Close())
+
+					res := http.Response{Header: http.Header{}, Body: ioutil.NopCloser(&out)}
+					res.Header.Add("Content-Type", fmt.Sprintf("multipart/mixed; boundary=%s", writer.Boundary()))
+					if tc.responseCompression == GzipCompression {
+						res.Header.Add("Content-Encoding", "gzip")
+					}
+					return &res, nil
+				})
+
+			stdio := mock.NewMockStdIO(ctrl)
+			writtenBytes := bytes.Buffer{}
+			stdio.EXPECT().Write(gomock.Any()).DoAndReturn(writtenBytes.Write).AnyTimes()
+			log.SetOutput(stdio)
+
+			cli := Client{
+				CLI:       clients.CLI{StdIO: stdio},
+				BackupApi: backupApi,
+				baseName:  "test",
+			}
+
+			out, err := ioutil.TempDir("", "")
+			require.NoError(t, err)
+			defer os.RemoveAll(out)
+
+			params := Params{
+				Path:        out,
+				Compression: tc.compression,
+			}
+
+			require.NoError(t, cli.downloadMetadata(context.Background(), &params))
+			require.Equal(t, bucketMetadata, cli.bucketMetadata)
+
+			localKv, err := os.Open(filepath.Join(out, cli.manifest.KV.FileName))
+			require.NoError(t, err)
+			defer localKv.Close()
+
+			var kvReader io.Reader = localKv
+			if tc.compression == GzipCompression {
+				gzr, err := gzip.NewReader(kvReader)
+				require.NoError(t, err)
+				defer gzr.Close()
+				kvReader = gzr
+			}
+			kvBytes, err := ioutil.ReadAll(kvReader)
+			require.NoError(t, err)
+			require.Equal(t, fakeKV, string(kvBytes))
+
+			localSql, err := os.Open(filepath.Join(out, cli.manifest.SQL.FileName))
+			require.NoError(t, err)
+			defer localSql.Close()
+
+			var sqlReader io.Reader = localSql
+			if tc.compression == GzipCompression {
+				gzr, err := gzip.NewReader(sqlReader)
+				require.NoError(t, err)
+				defer gzr.Close()
+				sqlReader = gzr
+			}
+			sqlBytes, err := ioutil.ReadAll(sqlReader)
+			require.NoError(t, err)
+			require.Equal(t, fakeSQL, string(sqlBytes))
+		})
+	}
+}
+
+func TestBackup_DownloadShardData(t *testing.T) {
+	t.Parallel()
+
+	fakeTsm := strings.Repeat("Time series data!\n", 1024)
+
+	testCases := []struct {
+		name                string
+		compression         FileCompression
+		responseCompression FileCompression
+	}{
+		{
+			name:                "no gzip",
+			compression:         NoCompression,
+			responseCompression: NoCompression,
+		},
+		{
+			name:                "response gzip, no local gzip",
+			compression:         NoCompression,
+			responseCompression: GzipCompression,
+		},
+		{
+			name:                "no response gzip, local gzip",
+			compression:         GzipCompression,
+			responseCompression: NoCompression,
+		},
+		{
+			name:                "all gzip",
+			compression:         GzipCompression,
+			responseCompression: GzipCompression,
+		},
+	}
+
+	for _, tc := range testCases {
+		tc := tc
+		t.Run(tc.name, func(t *testing.T) {
+			t.Parallel()
+
+			ctrl := gomock.NewController(t)
+
+			backupApi := mock.NewMockBackupApi(ctrl)
+			req := api.ApiGetBackupShardIdRequest{ApiService: backupApi}.ShardID(1)
+			backupApi.EXPECT().GetBackupShardId(gomock.Any(), gomock.Eq(req.GetShardID())).Return(req)
+			backupApi.EXPECT().GetBackupShardIdExecute(gomock.Any()).
+				DoAndReturn(func(api.ApiGetBackupShardIdRequest) (*http.Response, error) {
+					out := bytes.Buffer{}
+					var outW io.Writer = &out
+					if tc.responseCompression == GzipCompression {
+						gzw := gzip.NewWriter(outW)
+						defer gzw.Close()
+						outW = gzw
+					}
+					_, err := outW.Write([]byte(fakeTsm))
+					require.NoError(t, err)
+					res := http.Response{Header: http.Header{}, Body: ioutil.NopCloser(&out)}
+					res.Header.Add("Content-Type", "application/octet-stream")
+					if tc.responseCompression == GzipCompression {
+						res.Header.Add("Content-Encoding", "gzip")
+					}
+					return &res, nil
+				})
+
+			stdio := mock.NewMockStdIO(ctrl)
+			writtenBytes := bytes.Buffer{}
+			stdio.EXPECT().Write(gomock.Any()).DoAndReturn(writtenBytes.Write).AnyTimes()
+			log.SetOutput(stdio)
+
+			cli := Client{
+				CLI:       clients.CLI{StdIO: stdio},
+				BackupApi: backupApi,
+				baseName:  "test",
+			}
+
+			out, err := ioutil.TempDir("", "")
+			require.NoError(t, err)
+			defer os.RemoveAll(out)
+
+			params := Params{
+				Path:        out,
+				Compression: tc.compression,
+			}
+
+			metadata, err := cli.downloadShardData(context.Background(), &params, req.GetShardID())
+			require.NoError(t, err)
+			require.NotNil(t, metadata)
+			localShard, err := os.Open(filepath.Join(out, metadata.FileName))
+			require.NoError(t, err)
+			defer localShard.Close()
+
+			var shardReader io.Reader = localShard
+			if tc.compression == GzipCompression {
+				gzr, err := gzip.NewReader(shardReader)
+				require.NoError(t, err)
+				defer gzr.Close()
+				shardReader = gzr
+			}
+			shardBytes, err := ioutil.ReadAll(shardReader)
+			require.NoError(t, err)
+			require.Equal(t, fakeTsm, string(shardBytes))
+		})
+	}
+
+	t.Run("shard deleted", func(t *testing.T) {
+		t.Parallel()
+
+		ctrl := gomock.NewController(t)
+
+		backupApi := mock.NewMockBackupApi(ctrl)
+		req := api.ApiGetBackupShardIdRequest{ApiService: backupApi}.ShardID(1)
+		backupApi.EXPECT().GetBackupShardId(gomock.Any(), gomock.Eq(req.GetShardID())).Return(req)
+		backupApi.EXPECT().GetBackupShardIdExecute(gomock.Any()).Return(nil, &notFoundErr{})
+
+		stdio := mock.NewMockStdIO(ctrl)
+		writtenBytes := bytes.Buffer{}
+		stdio.EXPECT().Write(gomock.Any()).DoAndReturn(writtenBytes.Write).AnyTimes()
+		log.SetOutput(stdio)
+
+		cli := Client{
+			CLI:       clients.CLI{StdIO: stdio},
+			BackupApi: backupApi,
+			baseName:  "test",
+		}
+
+		out, err := ioutil.TempDir("", "")
+		require.NoError(t, err)
+		defer os.RemoveAll(out)
+
+		params := Params{
+			Path: out,
+		}
+
+		metadata, err := cli.downloadShardData(context.Background(), &params, req.GetShardID())
+		require.NoError(t, err)
+		require.Nil(t, metadata)
+		require.Contains(t, writtenBytes.String(), fmt.Sprintf("WARN: Shard %d removed during backup", req.GetShardID()))
+	})
+}
+
+type notFoundErr struct{}
+
+func (e *notFoundErr) Error() string {
+	return "not found"
+}
+
+func (e *notFoundErr) ErrorCode() api.ErrorCode {
+	return api.ERRORCODE_NOT_FOUND
+}

clients/backup/manifest.go

@@ -0,0 +1,192 @@
+package backup
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/influxdata/influx-cli/v2/api"
+)
+
+type FileCompression int
+
+const (
+	NoCompression FileCompression = iota
+	GzipCompression
+)
+
+func (c *FileCompression) Set(v string) error {
+	switch v {
+	case "none":
+		*c = NoCompression
+	case "gzip":
+		*c = GzipCompression
+	default:
+		return fmt.Errorf("unsupported format: %q", v)
+	}
+	return nil
+}
+
+func (c FileCompression) String() string {
+	switch c {
+	case NoCompression:
+		return "none"
+	case GzipCompression:
+		return "gzip"
+	default:
+		panic("Impossible!")
+	}
+}
+
+type Manifest struct {
+	KV      ManifestFileEntry     `json:"kv"`
+	SQL     ManifestFileEntry     `json:"sql"`
+	Buckets []ManifestBucketEntry `json:"buckets"`
+}
+
+type ManifestFileEntry struct {
+	FileName    string          `json:"fileName"`
+	Size        int64           `json:"size"`
+	Compression FileCompression `json:"compression"`
+}
+
+func ConvertBucketManifest(manifest api.BucketMetadataManifest, getShard func(shardId int64) (*ManifestFileEntry, error)) (ManifestBucketEntry, error) {
+	m := ManifestBucketEntry{
+		OrganizationID:         manifest.OrganizationID,
+		OrganizationName:       manifest.OrganizationName,
+		BucketID:               manifest.BucketID,
+		BucketName:             manifest.BucketName,
+		DefaultRetentionPolicy: manifest.DefaultRetentionPolicy,
+		RetentionPolicies:      make([]ManifestRetentionPolicy, len(manifest.RetentionPolicies)),
+	}
+
+	for i, rp := range manifest.RetentionPolicies {
+		var err error
+		m.RetentionPolicies[i], err = ConvertRetentionPolicy(rp, getShard)
+		if err != nil {
+			return ManifestBucketEntry{}, err
+		}
+	}
+
+	return m, nil
+}
+
+func ConvertRetentionPolicy(manifest api.RetentionPolicyManifest, getShard func(shardId int64) (*ManifestFileEntry, error)) (ManifestRetentionPolicy, error) {
+	m := ManifestRetentionPolicy{
+		Name:               manifest.Name,
+		ReplicaN:           manifest.ReplicaN,
+		Duration:           manifest.Duration,
+		ShardGroupDuration: manifest.ShardGroupDuration,
+		ShardGroups:        make([]ManifestShardGroup, len(manifest.ShardGroups)),
+		Subscriptions:      make([]ManifestSubscription, len(manifest.Subscriptions)),
+	}
+
+	for i, sg := range manifest.ShardGroups {
+		var err error
+		m.ShardGroups[i], err = ConvertShardGroup(sg, getShard)
+		if err != nil {
+			return ManifestRetentionPolicy{}, err
+		}
+	}
+
+	for i, s := range manifest.Subscriptions {
+		m.Subscriptions[i] = ManifestSubscription{
+			Name:         s.Name,
+			Mode:         s.Mode,
+			Destinations: s.Destinations,
+		}
+	}
+
+	return m, nil
+}
+
+func ConvertShardGroup(manifest api.ShardGroupManifest, getShard func(shardId int64) (*ManifestFileEntry, error)) (ManifestShardGroup, error) {
+	m := ManifestShardGroup{
+		ID:          manifest.Id,
+		StartTime:   manifest.StartTime,
+		EndTime:     manifest.EndTime,
+		DeletedAt:   manifest.DeletedAt,
+		TruncatedAt: manifest.TruncatedAt,
+		Shards:      make([]ManifestShardEntry, 0, len(manifest.Shards)),
+	}
+
+	for _, sh := range manifest.Shards {
+		maybeShard, err := ConvertShard(sh, getShard)
+		if err != nil {
+			return ManifestShardGroup{}, err
+		}
+		// Shard deleted mid-backup.
+		if maybeShard == nil {
+			continue
+		}
+		m.Shards = append(m.Shards, *maybeShard)
+	}
+
+	return m, nil
+}
+
+func ConvertShard(manifest api.ShardManifest, getShard func(shardId int64) (*ManifestFileEntry, error)) (*ManifestShardEntry, error) {
+	shardFileInfo, err := getShard(manifest.Id)
+	if err != nil {
+		return nil, fmt.Errorf("failed to download snapshot of shard %d: %w", manifest.Id, err)
+	}
+	if shardFileInfo == nil {
+		return nil, nil
+	}
+
+	m := ManifestShardEntry{
+		ID:                manifest.Id,
+		ShardOwners:       make([]ShardOwner, len(manifest.ShardOwners)),
+		ManifestFileEntry: *shardFileInfo,
+	}
+
+	for i, o := range manifest.ShardOwners {
+		m.ShardOwners[i] = ShardOwner{
+			NodeID: o.NodeID,
+		}
+	}
+
+	return &m, nil
+}
+
+type ManifestBucketEntry struct {
+	OrganizationID         string                    `json:"organizationID"`
+	OrganizationName       string                    `json:"organizationName"`
+	BucketID               string                    `json:"bucketID"`
+	BucketName             string                    `json:"bucketName"`
+	DefaultRetentionPolicy string                    `json:"defaultRetentionPolicy"`
+	RetentionPolicies      []ManifestRetentionPolicy `json:"retentionPolicies"`
+}
+
+type ManifestRetentionPolicy struct {
+	Name               string                 `json:"name"`
+	ReplicaN           int32                  `json:"replicaN"`
+	Duration           int64                  `json:"duration"`
+	ShardGroupDuration int64                  `json:"shardGroupDuration"`
+	ShardGroups        []ManifestShardGroup   `json:"shardGroups"`
+	Subscriptions      []ManifestSubscription `json:"subscriptions"`
+}
+
+type ManifestShardGroup struct {
+	ID          int64                `json:"id"`
+	StartTime   time.Time            `json:"startTime"`
+	EndTime     time.Time            `json:"endTime"`
+	DeletedAt   *time.Time           `json:"deletedAt,omitempty"`
+	TruncatedAt *time.Time           `json:"truncatedAt,omitempty"`
+	Shards      []ManifestShardEntry `json:"shards"`
+}
+
+type ManifestShardEntry struct {
+	ID          int64        `json:"id"`
+	ShardOwners []ShardOwner `json:"shardOwners"`
+	ManifestFileEntry
+}
+
+type ShardOwner struct {
+	NodeID int64 `json:"nodeID"`
+}
+
+type ManifestSubscription struct {
+	Name         string   `json:"name"`
+	Mode         string   `json:"mode"`
+	Destinations []string `json:"destinations"`
+}

clients/backup/manifest_test.go

@@ -0,0 +1,184 @@
+package backup_test
+
+import (
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/influxdata/influx-cli/v2/api"
+	"github.com/influxdata/influx-cli/v2/clients/backup"
+	"github.com/stretchr/testify/require"
+)
+
+func TestConvertBucketManifest(t *testing.T) {
+	t.Parallel()
+
+	now := time.Now()
+
+	manifest := api.BucketMetadataManifest{
+		OrganizationID:         "123",
+		OrganizationName:       "org",
+		BucketID:               "456",
+		BucketName:             "bucket",
+		DefaultRetentionPolicy: "foo",
+		RetentionPolicies: []api.RetentionPolicyManifest{
+			{
+				Name:               "foo",
+				ReplicaN:           1,
+				Duration:           100,
+				ShardGroupDuration: 10,
+				ShardGroups: []api.ShardGroupManifest{
+					{
+						Id:          1,
+						StartTime:   now,
+						EndTime:     now,
+						TruncatedAt: &now,
+						Shards: []api.ShardManifest{
+							{
+								Id:          10,
+								ShardOwners: []api.ShardOwner{{NodeID: 1}},
+							},
+							{
+								Id:          20,
+								ShardOwners: []api.ShardOwner{{NodeID: 2}, {NodeID: 3}},
+							},
+						},
+					},
+					{
+						Id:        2,
+						StartTime: now,
+						EndTime:   now,
+						DeletedAt: &now,
+						Shards: []api.ShardManifest{
+							{
+								Id: 30,
+							},
+						},
+					},
+				},
+				Subscriptions: []api.SubscriptionManifest{},
+			},
+			{
+				Name:               "bar",
+				ReplicaN:           3,
+				Duration:           9999,
+				ShardGroupDuration: 1,
+				ShardGroups: []api.ShardGroupManifest{
+					{
+						Id:        3,
+						StartTime: now,
+						EndTime:   now,
+						Shards:    []api.ShardManifest{},
+					},
+				},
+				Subscriptions: []api.SubscriptionManifest{
+					{
+						Name:         "test",
+						Mode:         "on",
+						Destinations: []string{"here", "there", "everywhere"},
+					},
+					{
+						Name:         "test2",
+						Mode:         "off",
+						Destinations: []string{},
+					},
+				},
+			},
+		},
+	}
+
+	fakeGetShard := func(id int64) (*backup.ManifestFileEntry, error) {
+		if id == 20 {
+			return nil, nil
+		}
+		return &backup.ManifestFileEntry{
+			FileName:    fmt.Sprintf("%d.gz", id),
+			Size:        id * 100,
+			Compression: backup.GzipCompression,
+		}, nil
+	}
+
+	converted, err := backup.ConvertBucketManifest(manifest, fakeGetShard)
+	require.NoError(t, err)
+
+	expected := backup.ManifestBucketEntry{
+		OrganizationID:         "123",
+		OrganizationName:       "org",
+		BucketID:               "456",
+		BucketName:             "bucket",
+		DefaultRetentionPolicy: "foo",
+		RetentionPolicies: []backup.ManifestRetentionPolicy{
+			{
+				Name:               "foo",
+				ReplicaN:           1,
+				Duration:           100,
+				ShardGroupDuration: 10,
+				ShardGroups: []backup.ManifestShardGroup{
+					{
+						ID:          1,
+						StartTime:   now,
+						EndTime:     now,
+						TruncatedAt: &now,
+						Shards: []backup.ManifestShardEntry{
+							{
+								ID:          10,
+								ShardOwners: []backup.ShardOwner{{NodeID: 1}},
+								ManifestFileEntry: backup.ManifestFileEntry{
+									FileName:    "10.gz",
+									Size:        1000,
+									Compression: backup.GzipCompression,
+								},
+							},
+						},
+					},
+					{
+						ID:        2,
+						StartTime: now,
+						EndTime:   now,
+						DeletedAt: &now,
+						Shards: []backup.ManifestShardEntry{
+							{
+								ID:          30,
+								ShardOwners: []backup.ShardOwner{},
+								ManifestFileEntry: backup.ManifestFileEntry{
+									FileName:    "30.gz",
+									Size:        3000,
+									Compression: backup.GzipCompression,
+								},
+							},
+						},
+					},
+				},
+				Subscriptions: []backup.ManifestSubscription{},
+			},
+			{
+				Name:               "bar",
+				ReplicaN:           3,
+				Duration:           9999,
+				ShardGroupDuration: 1,
+				ShardGroups: []backup.ManifestShardGroup{
+					{
+						ID:        3,
+						StartTime: now,
+						EndTime:   now,
+						Shards:    []backup.ManifestShardEntry{},
+					},
+				},
+				Subscriptions: []backup.ManifestSubscription{
+					{
+						Name:         "test",
+						Mode:         "on",
+						Destinations: []string{"here", "there", "everywhere"},
+					},
+					{
+						Name:         "test2",
+						Mode:         "off",
+						Destinations: []string{},
+					},
+				},
+			},
+		},
+	}
+
+	require.Equal(t, expected, converted)
+}

cmd/influx/backup.go

@@ -0,0 +1,72 @@
+package main
+
+import (
+	"errors"
+
+	"github.com/influxdata/influx-cli/v2/clients/backup"
+	"github.com/influxdata/influx-cli/v2/pkg/cli/middleware"
+	"github.com/urfave/cli/v2"
+)
+
+func newBackupCmd() *cli.Command {
+	var params backup.Params
+	// Default to gzipping local files.
+	params.Compression = backup.GzipCompression
+
+	return &cli.Command{
+		Name:  "backup",
+		Usage: "Backup database",
+		Description: `Backs up InfluxDB to a directory
+
+Examples:
+	# backup all data
+	influx backup /path/to/backup
+`,
+		ArgsUsage: "path",
+		Before:    middleware.WithBeforeFns(withCli(), withApi(true)),
+		Flags: append(
+			commonFlagsNoPrint(),
+			&cli.StringFlag{
+				Name:        "org-id",
+				Usage:       "The ID of the organization",
+				EnvVars:     []string{"INFLUX_ORG_ID"},
+				Destination: &params.OrgID,
+			},
+			&cli.StringFlag{
+				Name:        "org",
+				Usage:       "The name of the organization",
+				Aliases:     []string{"o"},
+				EnvVars:     []string{"INFLUX_ORG"},
+				Destination: &params.Org,
+			},
+			&cli.StringFlag{
+				Name:        "bucket-id",
+				Usage:       "The ID of the bucket to backup",
+				Destination: &params.BucketID,
+			},
+			&cli.StringFlag{
+				Name:        "bucket",
+				Usage:       "The name of the bucket to backup",
+				Aliases:     []string{"b"},
+				Destination: &params.Bucket,
+			},
+			&cli.GenericFlag{
+				Name:  "compression",
+				Usage: "Compression to use for local backup files, either 'none' or 'gzip'",
+				Value: &params.Compression,
+			},
+		),
+		Action: func(ctx *cli.Context) error {
+			if ctx.NArg() != 1 {
+				return errors.New("backup path must be specified as a single positional argument")
+			}
+			params.Path = ctx.Args().Get(0)
+
+			client := backup.Client{
+				CLI:       getCLI(ctx),
+				BackupApi: getAPI(ctx).BackupApi,
+			}
+			return client.Backup(ctx.Context, &params)
+		},
+	}
+}

cmd/influx/main.go

@@ -44,6 +44,7 @@ var app = cli.App{
 		newDeleteCmd(),
 		newUserCmd(),
 		newTaskCommand(),
+		newBackupCmd(),
 	},
 }
 

internal/mock/api_backup.gen.go

@@ -0,0 +1,95 @@
+// Code generated by MockGen. DO NOT EDIT.
+// Source: github.com/influxdata/influx-cli/v2/api (interfaces: BackupApi)
+
+// Package mock is a generated GoMock package.
+package mock
+
+import (
+	context "context"
+	http "net/http"
+	reflect "reflect"
+
+	gomock "github.com/golang/mock/gomock"
+	api "github.com/influxdata/influx-cli/v2/api"
+)
+
+// MockBackupApi is a mock of BackupApi interface.
+type MockBackupApi struct {
+	ctrl     *gomock.Controller
+	recorder *MockBackupApiMockRecorder
+}
+
+// MockBackupApiMockRecorder is the mock recorder for MockBackupApi.
+type MockBackupApiMockRecorder struct {
+	mock *MockBackupApi
+}
+
+// NewMockBackupApi creates a new mock instance.
+func NewMockBackupApi(ctrl *gomock.Controller) *MockBackupApi {
+	mock := &MockBackupApi{ctrl: ctrl}
+	mock.recorder = &MockBackupApiMockRecorder{mock}
+	return mock
+}
+
+// EXPECT returns an object that allows the caller to indicate expected use.
+func (m *MockBackupApi) EXPECT() *MockBackupApiMockRecorder {
+	return m.recorder
+}
+
+// GetBackupMetadata mocks base method.
+func (m *MockBackupApi) GetBackupMetadata(arg0 context.Context) api.ApiGetBackupMetadataRequest {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "GetBackupMetadata", arg0)
+	ret0, _ := ret[0].(api.ApiGetBackupMetadataRequest)
+	return ret0
+}
+
+// GetBackupMetadata indicates an expected call of GetBackupMetadata.
+func (mr *MockBackupApiMockRecorder) GetBackupMetadata(arg0 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetBackupMetadata", reflect.TypeOf((*MockBackupApi)(nil).GetBackupMetadata), arg0)
+}
+
+// GetBackupMetadataExecute mocks base method.
+func (m *MockBackupApi) GetBackupMetadataExecute(arg0 api.ApiGetBackupMetadataRequest) (*http.Response, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "GetBackupMetadataExecute", arg0)
+	ret0, _ := ret[0].(*http.Response)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// GetBackupMetadataExecute indicates an expected call of GetBackupMetadataExecute.
+func (mr *MockBackupApiMockRecorder) GetBackupMetadataExecute(arg0 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetBackupMetadataExecute", reflect.TypeOf((*MockBackupApi)(nil).GetBackupMetadataExecute), arg0)
+}
+
+// GetBackupShardId mocks base method.
+func (m *MockBackupApi) GetBackupShardId(arg0 context.Context, arg1 int64) api.ApiGetBackupShardIdRequest {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "GetBackupShardId", arg0, arg1)
+	ret0, _ := ret[0].(api.ApiGetBackupShardIdRequest)
+	return ret0
+}
+
+// GetBackupShardId indicates an expected call of GetBackupShardId.
+func (mr *MockBackupApiMockRecorder) GetBackupShardId(arg0, arg1 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetBackupShardId", reflect.TypeOf((*MockBackupApi)(nil).GetBackupShardId), arg0, arg1)
+}
+
+// GetBackupShardIdExecute mocks base method.
+func (m *MockBackupApi) GetBackupShardIdExecute(arg0 api.ApiGetBackupShardIdRequest) (*http.Response, error) {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "GetBackupShardIdExecute", arg0)
+	ret0, _ := ret[0].(*http.Response)
+	ret1, _ := ret[1].(error)
+	return ret0, ret1
+}
+
+// GetBackupShardIdExecute indicates an expected call of GetBackupShardIdExecute.
+func (mr *MockBackupApiMockRecorder) GetBackupShardIdExecute(arg0 interface{}) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetBackupShardIdExecute", reflect.TypeOf((*MockBackupApi)(nil).GetBackupShardIdExecute), arg0)
+}

internal/mock/gen.go

@@ -10,6 +10,7 @@ package mock
 //go:generate go run github.com/golang/mock/mockgen -package mock -destination api_query.gen.go github.com/influxdata/influx-cli/v2/api QueryApi
 //go:generate go run github.com/golang/mock/mockgen -package mock -destination api_users.gen.go github.com/influxdata/influx-cli/v2/api UsersApi
 //go:generate go run github.com/golang/mock/mockgen -package mock -destination api_delete.gen.go github.com/influxdata/influx-cli/v2/api DeleteApi
+//go:generate go run github.com/golang/mock/mockgen -package mock -destination api_backup.gen.go github.com/influxdata/influx-cli/v2/api BackupApi
 
 // Other mocks
 //go:generate go run github.com/golang/mock/mockgen -package mock -destination config.gen.go -mock_names Service=MockConfigService github.com/influxdata/influx-cli/v2/internal/config Service