206 lines
5.6 KiB
Go
206 lines
5.6 KiB
Go
package app
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import (
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"context"
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"fmt"
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"io/ioutil"
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"path/filepath"
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"strconv"
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"strings"
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"time"
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"coopcloud.tech/abra/cli/internal"
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"coopcloud.tech/abra/pkg/autocomplete"
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"coopcloud.tech/abra/pkg/client"
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"coopcloud.tech/abra/pkg/config"
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containerPkg "coopcloud.tech/abra/pkg/container"
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"coopcloud.tech/abra/pkg/recipe"
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"coopcloud.tech/abra/pkg/upstream/container"
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"github.com/docker/cli/cli/command"
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"github.com/docker/docker/api/types"
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"github.com/docker/docker/api/types/filters"
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"github.com/sirupsen/logrus"
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"github.com/urfave/cli"
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)
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type backupConfig struct {
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preHookCmd string
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postHookCmd string
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backupPaths []string
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}
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var appBackupCommand = cli.Command{
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Name: "backup",
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Aliases: []string{"bk"},
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Usage: "Run app backup",
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ArgsUsage: "<domain> [<service>]",
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Flags: []cli.Flag{
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internal.DebugFlag,
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},
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Before: internal.SubCommandBefore,
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BashComplete: autocomplete.AppNameComplete,
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Description: `
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This command runs an app backup.
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A backup command and pre/post hook commands are defined in the recipe
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configuration. Abra reads this config and run the comands in the context of the
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service. Pass <service> if you only want to back up a single service. All
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backups are placed in the ~/.abra/backups directory.
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Example:
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abra app backup example.com db
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`,
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Action: func(c *cli.Context) error {
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app := internal.ValidateApp(c)
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recipe, err := recipe.Get(app.Recipe)
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if err != nil {
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logrus.Fatal(err)
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}
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backupConfigs := make(map[string]backupConfig)
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for _, service := range recipe.Config.Services {
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if backupsEnabled, ok := service.Deploy.Labels["backupbot.backup"]; ok {
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if backupsEnabled == "true" {
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fullServiceName := fmt.Sprintf("%s_%s", app.StackName(), service.Name)
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bkConfig := backupConfig{}
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logrus.Debugf("backup config detected for %s", fullServiceName)
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if paths, ok := service.Deploy.Labels["backupbot.backup.path"]; ok {
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logrus.Debugf("detected backup paths for %s: %s", fullServiceName, paths)
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bkConfig.backupPaths = strings.Split(paths, ",")
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}
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if preHookCmd, ok := service.Deploy.Labels["backupbot.backup.pre-hook"]; ok {
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logrus.Debugf("detected pre-hook command for %s: %s", fullServiceName, preHookCmd)
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bkConfig.preHookCmd = preHookCmd
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}
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if postHookCmd, ok := service.Deploy.Labels["backupbot.backup.post-hook"]; ok {
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logrus.Debugf("detected post-hook command for %s: %s", fullServiceName, postHookCmd)
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bkConfig.postHookCmd = postHookCmd
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}
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backupConfigs[service.Name] = bkConfig
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}
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}
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}
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serviceName := c.Args().Get(1)
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if serviceName != "" {
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backupConfig, ok := backupConfigs[serviceName]
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if !ok {
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logrus.Fatalf("no backup config for %s? does %s exist?", serviceName, serviceName)
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}
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if err := runBackup(app, serviceName, backupConfig); err != nil {
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logrus.Fatal(err)
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}
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} else {
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for serviceName, backupConfig := range backupConfigs {
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if err := runBackup(app, serviceName, backupConfig); err != nil {
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logrus.Fatal(err)
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}
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}
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}
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return nil
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},
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}
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// runBackup does the actual backup logic.
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func runBackup(app config.App, serviceName string, bkConfig backupConfig) error {
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if len(bkConfig.backupPaths) == 0 {
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return fmt.Errorf("backup paths are empty for %s?", serviceName)
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}
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cl, err := client.New(app.Server)
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if err != nil {
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return err
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}
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// FIXME: avoid instantiating a new CLI
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dcli, err := command.NewDockerCli()
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if err != nil {
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return err
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}
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filters := filters.NewArgs()
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filters.Add("name", fmt.Sprintf("^%s_%s", app.StackName(), serviceName))
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targetContainer, err := containerPkg.GetContainer(context.Background(), cl, filters, true)
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if err != nil {
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return err
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}
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fullServiceName := fmt.Sprintf("%s_%s", app.StackName(), serviceName)
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if bkConfig.preHookCmd != "" {
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splitCmd := internal.SafeSplit(bkConfig.preHookCmd)
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logrus.Debugf("split pre-hook command for %s into %s", fullServiceName, splitCmd)
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preHookExecOpts := types.ExecConfig{
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AttachStderr: true,
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AttachStdin: true,
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AttachStdout: true,
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Cmd: splitCmd,
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Detach: false,
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Tty: true,
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}
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if err := container.RunExec(dcli, cl, targetContainer.ID, &preHookExecOpts); err != nil {
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return err
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}
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logrus.Infof("succesfully ran %s pre-hook command: %s", fullServiceName, bkConfig.preHookCmd)
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}
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for _, remoteBackupPath := range bkConfig.backupPaths {
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timestamp := strconv.Itoa(time.Now().Nanosecond())
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sanitisedPath := strings.ReplaceAll(remoteBackupPath, "/", "_")
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localBackupPath := filepath.Join(config.BACKUP_DIR, fmt.Sprintf("%s%s_%s.tar.gz", fullServiceName, sanitisedPath, timestamp))
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logrus.Debugf("backing up %s:%s to %s", fullServiceName, remoteBackupPath, localBackupPath)
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content, _, err := cl.CopyFromContainer(context.Background(), targetContainer.ID, remoteBackupPath)
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if err != nil {
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return err
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}
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defer content.Close()
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body, err := ioutil.ReadAll(content)
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if err != nil {
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return err
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}
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if err := ioutil.WriteFile(localBackupPath, body, 0644); err != nil {
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return err
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}
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logrus.Infof("backed up %s:%s to %s", fullServiceName, remoteBackupPath, localBackupPath)
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}
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if bkConfig.postHookCmd != "" {
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splitCmd := internal.SafeSplit(bkConfig.postHookCmd)
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logrus.Debugf("split post-hook command for %s into %s", fullServiceName, splitCmd)
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postHookExecOpts := types.ExecConfig{
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AttachStderr: true,
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AttachStdin: true,
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AttachStdout: true,
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Cmd: splitCmd,
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Detach: false,
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Tty: true,
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}
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if err := container.RunExec(dcli, cl, targetContainer.ID, &postHookExecOpts); err != nil {
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return err
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}
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logrus.Infof("succesfully ran %s post-hook command: %s", fullServiceName, bkConfig.postHookCmd)
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}
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return nil
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}
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