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upgrade.go
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upgrade.go
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package main
import (
"encoding/base64"
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"os"
"regexp"
"strings"
"github.com/dchest/uniuri"
"github.com/urfave/cli"
"k8s.io/client-go/1.5/pkg/api"
"github.com/fission/fission"
"github.com/fission/fission/tpr"
"github.com/fission/fission/v1"
)
type (
V1FissionState struct {
Functions []v1.Function `json:"functions"`
Environments []v1.Environment `json:"environments"`
Httptriggers []v1.HTTPTrigger `json:"httptriggers"`
Mqtriggers []v1.MessageQueueTrigger `json:"mqtriggers"`
Timetriggers []v1.TimeTrigger `json:"timetriggers"`
Watches []v1.Watch `json:"watches"`
NameChanges map[string]string `json:"namechanges"`
}
nameRemapper struct {
oldToNew map[string]string
newNames map[string]bool
}
)
func getV1URL(serverUrl string) string {
if len(serverUrl) == 0 {
fatal("Need --server or FISSION_URL set to your fission server.")
}
isHTTPS := strings.Index(serverUrl, "https://") == 0
isHTTP := strings.Index(serverUrl, "http://") == 0
if !(isHTTP || isHTTPS) {
serverUrl = "http://" + serverUrl
}
v1url := strings.TrimSuffix(serverUrl, "/") + "/v1"
return v1url
}
func get(url string) []byte {
resp, err := http.Get(url)
checkErr(err, "get fission v0.1 state")
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
checkErr(err, "reading server response")
if resp.StatusCode != 200 {
fatal(fmt.Sprintf("Failed to fetch fission v0.1 state: %v", string(body)))
}
return body
}
// track a name in the remapper, creating a new name if needed
func (nr *nameRemapper) trackName(old string) {
// all kubernetes names must match this regex
kubeNameRegex := "^[a-z0-9]([-a-z0-9]*[a-z0-9])?$"
maxLen := 63
ok, err := regexp.MatchString(kubeNameRegex, old)
checkErr(err, "match name regexp")
if ok && len(old) < maxLen {
// no rename
nr.oldToNew[old] = old
nr.newNames[old] = true
return
}
newName := strings.ToLower(old)
// remove disallowed
inv, err := regexp.Compile("[^-a-z0-9]")
checkErr(err, "compile regexp")
newName = string(inv.ReplaceAll([]byte(newName), []byte("-")))
// trim leading non-alphabetic
leadingnonalpha, err := regexp.Compile("^[^a-z]+")
checkErr(err, "compile regexp")
newName = string(leadingnonalpha.ReplaceAll([]byte(newName), []byte{}))
// trim trailing
trailing, err := regexp.Compile("[^a-z0-9]+$")
checkErr(err, "compile regexp")
newName = string(trailing.ReplaceAll([]byte(newName), []byte{}))
// truncate to length
if len(newName) > maxLen-4 {
newName = newName[0:(maxLen - 4)]
}
// uniqueness
n := newName
i := 0
for {
_, exists := nr.newNames[n]
if !exists {
break
} else {
i++
n = fmt.Sprintf("%v-%v", newName, i)
}
}
newName = n
// track
nr.oldToNew[old] = newName
nr.newNames[newName] = true
}
func upgradeDumpV1State(v1url string, filename string) {
var v1state V1FissionState
fmt.Println("Getting environments")
resp := get(v1url + "/environments")
err := json.Unmarshal(resp, &v1state.Environments)
checkErr(err, "parse server response")
fmt.Println("Getting watches")
resp = get(v1url + "/watches")
err = json.Unmarshal(resp, &v1state.Watches)
checkErr(err, "parse server response")
fmt.Println("Getting routes")
resp = get(v1url + "/triggers/http")
err = json.Unmarshal(resp, &v1state.Httptriggers)
checkErr(err, "parse server response")
fmt.Println("Getting message queue triggers")
resp = get(v1url + "/triggers/messagequeue")
err = json.Unmarshal(resp, &v1state.Mqtriggers)
checkErr(err, "parse server response")
fmt.Println("Getting time triggers")
resp = get(v1url + "/triggers/time")
err = json.Unmarshal(resp, &v1state.Timetriggers)
checkErr(err, "parse server response")
fmt.Println("Getting function list")
resp = get(v1url + "/functions")
err = json.Unmarshal(resp, &v1state.Functions)
checkErr(err, "parse server response")
// we have to change names that are disallowed in kubernetes
nr := nameRemapper{
oldToNew: make(map[string]string),
newNames: make(map[string]bool),
}
// get all referenced function metadata
funcMetaSet := make(map[v1.Metadata]bool)
for _, f := range v1state.Functions {
funcMetaSet[f.Metadata] = true
nr.trackName(f.Metadata.Name)
}
for _, t := range v1state.Httptriggers {
funcMetaSet[t.Function] = true
nr.trackName(t.Metadata.Name)
}
for _, t := range v1state.Mqtriggers {
funcMetaSet[t.Function] = true
nr.trackName(t.Metadata.Name)
}
for _, t := range v1state.Watches {
funcMetaSet[t.Function] = true
nr.trackName(t.Metadata.Name)
}
for _, t := range v1state.Timetriggers {
funcMetaSet[t.Function] = true
nr.trackName(t.Metadata.Name)
}
for _, e := range v1state.Environments {
nr.trackName(e.Metadata.Name)
}
fmt.Println("Getting functions")
// get each function
funcs := make(map[v1.Metadata]v1.Function)
for m := range funcMetaSet {
if len(m.Uid) != 0 {
resp = get(fmt.Sprintf("%v/functions/%v?uid=%v", v1url, m.Name, m.Uid))
} else {
resp = get(fmt.Sprintf("%v/functions/%v", v1url, m.Name))
}
var f v1.Function
// unmarshal
err = json.Unmarshal(resp, &f)
checkErr(err, "parse server response")
// load into a map to remove duplicates
funcs[f.Metadata] = f
}
// add list of unique functions to v1state from map
v1state.Functions = make([]v1.Function, 0)
for _, f := range funcs {
v1state.Functions = append(v1state.Functions, f)
}
// dump name changes
v1state.NameChanges = nr.oldToNew
// serialize v1state
out, err := json.MarshalIndent(v1state, "", " ")
checkErr(err, "serialize v0.1 state")
// dump to file fission-v01-state.json
if len(filename) == 0 {
filename = "fission-v01-state.json"
}
err = ioutil.WriteFile(filename, out, 0644)
checkErr(err, "write file")
fmt.Printf("Done: Saved %v functions, %v HTTP triggers, %v watches, %v message queue triggers, %v time triggers.\n",
len(v1state.Functions), len(v1state.Httptriggers), len(v1state.Watches), len(v1state.Mqtriggers), len(v1state.Timetriggers))
}
func functionRefFromV1Metadata(m *v1.Metadata, nameRemap map[string]string) *fission.FunctionReference {
return &fission.FunctionReference{
Type: fission.FunctionReferenceTypeFunctionName,
Name: nameRemap[m.Name],
}
}
func tprMetadataFromV1Metadata(m *v1.Metadata, nameRemap map[string]string) *api.ObjectMeta {
return &api.ObjectMeta{
Name: nameRemap[m.Name],
Namespace: api.NamespaceDefault,
}
}
func upgradeDumpState(c *cli.Context) error {
u := getV1URL(c.GlobalString("server"))
filename := c.String("file")
// check v1
resp, err := http.Get(u + "/environments")
checkErr(err, "reach fission server")
if resp.StatusCode == 404 {
msg := fmt.Sprintf("Server %v isn't a v1 Fission server. Use --server to point at a pre-0.2.x Fission server.", u)
fatal(msg)
}
upgradeDumpV1State(u, filename)
return nil
}
func upgradeRestoreState(c *cli.Context) error {
filename := c.String("file")
if len(filename) == 0 {
filename = "fission-v01-state.json"
}
contents, err := ioutil.ReadFile(filename)
checkErr(err, fmt.Sprintf("open file %v", filename))
var v1state V1FissionState
err = json.Unmarshal(contents, &v1state)
checkErr(err, "parse dumped v1 state")
// create a regular v2 client
client := getClient(c.GlobalString("server"))
// create functions
for _, f := range v1state.Functions {
// get post-rename function name, derive pkg name from it
fnName := v1state.NameChanges[f.Metadata.Name]
pkgName := fmt.Sprintf("%v-%v", fnName, strings.ToLower(uniuri.NewLen(6)))
// write function to file
tmpfile, err := ioutil.TempFile("", pkgName)
checkErr(err, "create temporary file")
code, err := base64.StdEncoding.DecodeString(f.Code)
checkErr(err, "decode base64 function contents")
tmpfile.Write(code)
tmpfile.Sync()
tmpfile.Close()
// upload
archive := createArchive(client, tmpfile.Name())
os.Remove(tmpfile.Name())
// create pkg
pkgSpec := fission.PackageSpec{
Environment: fission.EnvironmentReference{
Name: v1state.NameChanges[f.Environment.Name],
Namespace: api.NamespaceDefault,
},
Deployment: *archive,
}
pkg, err := client.PackageCreate(&tpr.Package{
Metadata: api.ObjectMeta{
Name: pkgName,
Namespace: api.NamespaceDefault,
},
Spec: pkgSpec,
})
checkErr(err, fmt.Sprintf("create package %v", pkgName))
_, err = client.FunctionCreate(&tpr.Function{
Metadata: *tprMetadataFromV1Metadata(&f.Metadata, v1state.NameChanges),
Spec: fission.FunctionSpec{
Environment: pkgSpec.Environment,
Package: fission.FunctionPackageRef{
PackageRef: fission.PackageRef{
Name: pkg.Name,
Namespace: pkg.Namespace,
ResourceVersion: pkg.ResourceVersion,
},
},
},
})
checkErr(err, fmt.Sprintf("create function %v", v1state.NameChanges[f.Metadata.Name]))
}
// create envs
for _, e := range v1state.Environments {
_, err = client.EnvironmentCreate(&tpr.Environment{
Metadata: *tprMetadataFromV1Metadata(&e.Metadata, v1state.NameChanges),
Spec: fission.EnvironmentSpec{
Version: 1,
Runtime: fission.Runtime{
Image: e.RunContainerImageUrl,
},
},
})
checkErr(err, fmt.Sprintf("create environment %v", e.Metadata.Name))
}
// create httptriggers
for _, t := range v1state.Httptriggers {
_, err = client.HTTPTriggerCreate(&tpr.Httptrigger{
Metadata: *tprMetadataFromV1Metadata(&t.Metadata, v1state.NameChanges),
Spec: fission.HTTPTriggerSpec{
RelativeURL: t.UrlPattern,
Method: t.Method,
FunctionReference: *functionRefFromV1Metadata(&t.Function, v1state.NameChanges),
},
})
checkErr(err, fmt.Sprintf("create http trigger %v", t.Metadata.Name))
}
// create mqtriggers
for _, t := range v1state.Mqtriggers {
_, err = client.MessageQueueTriggerCreate(&tpr.Messagequeuetrigger{
Metadata: *tprMetadataFromV1Metadata(&t.Metadata, v1state.NameChanges),
Spec: fission.MessageQueueTriggerSpec{
FunctionReference: *functionRefFromV1Metadata(&t.Function, v1state.NameChanges),
MessageQueueType: t.MessageQueueType,
Topic: t.Topic,
ResponseTopic: t.ResponseTopic,
},
})
checkErr(err, fmt.Sprintf("create http trigger %v", t.Metadata.Name))
}
// create time triggers
for _, t := range v1state.Timetriggers {
_, err = client.TimeTriggerCreate(&tpr.Timetrigger{
Metadata: *tprMetadataFromV1Metadata(&t.Metadata, v1state.NameChanges),
Spec: fission.TimeTriggerSpec{
FunctionReference: *functionRefFromV1Metadata(&t.Function, v1state.NameChanges),
Cron: t.Cron,
},
})
checkErr(err, fmt.Sprintf("create time trigger %v", t.Metadata.Name))
}
// create watches
for _, t := range v1state.Watches {
_, err = client.WatchCreate(&tpr.Kuberneteswatchtrigger{
Metadata: *tprMetadataFromV1Metadata(&t.Metadata, v1state.NameChanges),
Spec: fission.KubernetesWatchTriggerSpec{
Namespace: t.Namespace,
Type: t.ObjType,
FunctionReference: *functionRefFromV1Metadata(&t.Function, v1state.NameChanges),
},
})
checkErr(err, fmt.Sprintf("create kubernetes watch trigger %v", t.Metadata.Name))
}
return nil
}