/
cli.go
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/
cli.go
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/*
*Copyright ClusterHQ Inc. See LICENSE file for details.
*
*/
package cli
import (
"os/exec"
"os"
"fmt"
"strings"
"bufio"
"github.com/ClusterHQ/fli-docker/types"
"github.com/ClusterHQ/fli-docker/logger"
"github.com/ClusterHQ/fli-docker/utils"
)
/*
Bindings to the FlockerHub CLI
*/
func SetFlockerHubEndpoint(endpoint string, fli string) {
logger.Info.Println("Setting FlockerHub Endpoint: ", endpoint)
var cmd = fmt.Sprintf("%s config -u %s", fli, endpoint)
out, err := exec.Command("sh", "-c", cmd).Output()
if err != nil {
logger.Message.Println("Could not set endpoint:", endpoint)
logger.Message.Println(string(out))
logger.Error.Fatal(err)
}
logger.Info.Println(string(out))
}
func GetFlockerHubEndpoint(fli string) (flockerhubEndpoint string, err error) {
logger.Info.Println("Getting FlockerHub Endpoint")
var cmd = fmt.Sprintf("%s info | grep 'FlockerHub URL:' | awk '{print $3}'", fli)
out, err := exec.Command("sh", "-c", cmd).Output()
if err != nil {
logger.Message.Println("Could not get endpoint")
logger.Error.Println(err)
return "", err
}
logger.Info.Println(string(out))
return string(out), nil
}
func SetFlockerHubTokenFile(tokenFile string, fli string) {
logger.Info.Println("Setting FlockerHub Tokenfile: ", tokenFile)
var cmd = fmt.Sprintf("%s config -t %s", fli, tokenFile)
out, err := exec.Command("sh", "-c", cmd).Output()
if err != nil {
logger.Message.Println("Could not set tokenfile: ", tokenFile)
logger.Message.Println(string(out))
logger.Error.Fatal(err)
}
logger.Info.Println(string(out))
}
func GetFlockerHubTokenFile(fli string) (flockerHubTokenFile string, err error) {
logger.Info.Println("Getting FlockerHub Tokenfile")
var cmd = fmt.Sprintf("%s info | grep 'Auth Token File:' | awk '{print $4}'", fli)
out, err := exec.Command("sh", "-c", cmd).Output()
if err != nil {
logger.Message.Println("Could not get tokenfile")
logger.Error.Println(err)
return "", err
}
logger.Info.Println(string(out))
return string(out), nil
}
// Run the command to sync a volumeset
func syncVolumeset(volumeSetId string, fli string) {
logger.Info.Println("Syncing Volumeset: ", volumeSetId)
var cmd = fmt.Sprintf("%s sync %s", fli, volumeSetId)
out, err := exec.Command("sh", "-c", cmd).Output()
if err != nil {
logger.Message.Println("Could not sync dataset")
logger.Message.Println(string(out))
logger.Error.Fatal(err)
}
logger.Info.Println(string(out))
}
// Run the command to pull a specific snapshot
func pullSnapshot(volumeSetId string, snapshotId string, fli string){
logger.Info.Println("Pulling Snapshot: ", snapshotId)
var cmd = fmt.Sprintf("%s pull %s:%s", fli, volumeSetId, snapshotId)
out, err := exec.Command("sh", "-c", cmd).Output()
if err != nil {
logger.Message.Println("Could not pull dataset, reason")
logger.Message.Println(string(out))
logger.Error.Fatal(err)
}
logger.Info.Println(string(out))
}
// Run the command to pull a specific volumeset
func pullVolumeset(volumeSetId string, fli string){
logger.Info.Println("Pulling Volumeset: ", volumeSetId)
var cmd = fmt.Sprintf("%s pull %s", fli, volumeSetId)
out, err := exec.Command("sh", "-c", cmd).Output()
if err != nil {
logger.Message.Println("Could not pull volumeset, reason")
logger.Message.Println(string(out))
logger.Error.Fatal(err)
}
logger.Info.Println(string(out))
}
// Wrapper for sync and pull which takes
// a list of type Volume
func PullSnapshots(volumes []types.Volume, fli string) {
for _, volume := range volumes {
syncVolumeset(volume.VolumeSet, fli)
if volume.Branch == "" && volume.Snapshot != "" {
pullSnapshot(volume.VolumeSet, volume.Snapshot, fli)
}else if volume.Branch != "" && volume.Snapshot == "" {
// there is no fli pull vs:branch
pullVolumeset(volume.VolumeSet, fli)
}else{
// default to use the more specific is `branch:` and `snapshot:` exist.
pullSnapshot(volume.VolumeSet, volume.Snapshot, fli)
}
}
}
// Created a volume and returns it.
func createVolumeFromSnapshot(volumeName string, volumeSet string, snapshotId string, fli string) (vol types.NewVolume, err error){
logger.Info.Println("Creating Volume from Snapshot: ", snapshotId)
var attrString = fmt.Sprintf("created_by=fli-docker,from_snap=%s", snapshotId)
uuid, err := utils.GenUUID()
if err != nil {
logger.Error.Fatal(err)
}
var volName = fmt.Sprintf("fli-%s", uuid)
var createCmd = fmt.Sprintf("%s clone %s:%s -a %s %s", fli, volumeSet, snapshotId, attrString, volName)
cmd := exec.Command("sh", "-c", createCmd)
createOut, err := cmd.Output()
if err != nil {
logger.Error.Fatal(err)
}
var path = strings.TrimSpace(string(createOut))
logger.Info.Println(path)
if path == "" {
logger.Error.Fatal("Could not find volume path")
}
return types.NewVolume{Name: volumeName, VolumePath: path, VolumeName: volName, VolumeSet: volumeSet}, nil
}
func saveCurrentWorkingVols(volumes []types.NewVolume) {
// open files r and w
exists, _ := utils.CheckForFile(".flidockervols")
if exists {
err := os.Remove(".flidockervols")
if err != nil {
logger.Error.Fatal("Could not delete .flidockervols")
}
}
_, err := os.Create(".flidockervols")
if err != nil {
logger.Error.Fatal(err)
}
file, err := os.OpenFile(".flidockervols", os.O_APPEND|os.O_WRONLY,0600)
if err != nil {
logger.Error.Fatal(err)
}
defer file.Close()
for _, newVol := range volumes {
var volRecord = fmt.Sprintf("%s,%s\n", strings.TrimSpace(newVol.VolumeName), newVol.VolumeSet)
if _, err = file.WriteString(volRecord); err != nil {
logger.Error.Fatal(err)
}
}
logger.Info.Println("Saves working vols to .flidockervols")
}
func CreateVolumesFromSnapshots(volumes []types.Volume, fli string) (newVols []types.NewVolume, err error) {
vols := []types.NewVolume{}
for _, volume := range volumes {
var vol types.NewVolume
if volume.Branch == "" && volume.Snapshot != "" {
logger.Message.Println("Creating volume from snapshot...")
vol, err = createVolumeFromSnapshot(volume.Name, volume.VolumeSet, volume.Snapshot, fli)
}else if volume.Branch != "" && volume.Snapshot == "" {
// fli clone vs:branch is same as fli clone vs:snap
logger.Message.Println("Creating volume from branch...")
vol, err = createVolumeFromSnapshot(volume.Name, volume.VolumeSet, volume.Branch, fli)
}else{
// default to use the more specific is `branch:` and `snapshot:` exist.
logger.Message.Println("Creating volume from snapshot...")
vol, err = createVolumeFromSnapshot(volume.Name, volume.VolumeSet, volume.Snapshot, fli)
}
if err != nil {
return nil, err
}else {
vols = append(vols, vol)
}
}
// Record current working volumes.
saveCurrentWorkingVols(vols)
return vols, nil
}
// Run the command to push a specific snapshot
func pushSnapshot(volumeSetId string, snapshotId string, fli string){
logger.Info.Println("Pushing Snapshot: ", snapshotId)
var cmd = fmt.Sprintf("%s push %s:%s", fli, volumeSetId, snapshotId)
out, err := exec.Command("sh", "-c", cmd).Output()
if err != nil {
logger.Message.Println("Could not push snapshot, reason")
logger.Message.Println(string(out))
logger.Error.Fatal(err)
}
logger.Info.Println(string(out))
}
// Run the command to push a specific snapshot
func createSnapshot(volumeSetId string, volumeId string, snapName string, fli string){
logger.Info.Println("Creating Snapshot: ", snapName)
var cmd = fmt.Sprintf("%s snapshot %s:%s %s", fli, volumeSetId, volumeId, snapName)
out, err := exec.Command("sh", "-c", cmd).Output()
if err != nil {
logger.Message.Println("Could create snapshot, reason")
logger.Message.Println(string(out))
logger.Error.Fatal(err)
}
logger.Info.Println(string(out))
}
func SnapshotWorkingVolumes(fli string){
file, err := os.Open(".flidockervols")
if err != nil {
logger.Error.Fatal(err)
}
defer file.Close()
scanner := bufio.NewScanner(file)
for scanner.Scan() {
result := strings.Split(scanner.Text(), ",")
var uuid, _ = utils.GenUUID()
var snap = fmt.Sprintf("%s-%s", result[0], uuid)
logger.Message.Println("Snapshotting", result[0], "from Volumeset", result[1])
createSnapshot(result[1], result[0], snap, fli)
}
if err := scanner.Err(); err != nil {
logger.Error.Fatal(err)
}
}
func SnapshotAndPushWorkingVolumes(fli string){
file, err := os.Open(".flidockervols")
if err != nil {
logger.Error.Fatal(err)
}
defer file.Close()
scanner := bufio.NewScanner(file)
for scanner.Scan() {
result := strings.Split(scanner.Text(), ",")
var uuid, _ = utils.GenUUID()
var snap = fmt.Sprintf("%s-%s", result[0], uuid)
logger.Message.Println("Snapshotting and Pushing", result[0], "from Volumeset", result[1])
createSnapshot(result[1], result[0], snap, fli)
syncVolumeset(result[1], fli)
pushSnapshot(result[1], snap, fli)
}
if err := scanner.Err(); err != nil {
logger.Error.Fatal(err)
}
}