feat: backup/restore [ci skip]

See coop-cloud/organising#30.

cli/app/restore.go

@@ -0,0 +1,197 @@
+package app
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"os"
+
+	"coopcloud.tech/abra/cli/internal"
+	"coopcloud.tech/abra/pkg/autocomplete"
+	"coopcloud.tech/abra/pkg/client"
+	"coopcloud.tech/abra/pkg/config"
+	containerPkg "coopcloud.tech/abra/pkg/container"
+	"coopcloud.tech/abra/pkg/recipe"
+	"coopcloud.tech/abra/pkg/upstream/container"
+	"github.com/docker/cli/cli/command"
+	"github.com/docker/docker/api/types"
+	"github.com/docker/docker/api/types/filters"
+	"github.com/docker/docker/pkg/archive"
+	"github.com/sirupsen/logrus"
+	"github.com/urfave/cli"
+)
+
+type restoreConfig struct {
+	preHookCmd  string
+	postHookCmd string
+}
+
+var appRestoreCommand = cli.Command{
+	Name:      "restore",
+	Aliases:   []string{"rs"},
+	Usage:     "Run app restore",
+	ArgsUsage: "<domain> <service> <file> <path>",
+	Flags: []cli.Flag{
+		internal.DebugFlag,
+	},
+	Before:       internal.SubCommandBefore,
+	BashComplete: autocomplete.AppNameComplete,
+	Description: `
+This command runs an app restore.
+
+Pre/post hook commands are defined in the recipe configuration. Abra reads this
+config and run the comands in the context of the service before restoring the
+backup.
+
+Example:
+
+    abra app restore example.com app mybackup.tar.gz /var/lib/content
+`,
+	Action: func(c *cli.Context) error {
+		app := internal.ValidateApp(c)
+
+		serviceName := c.Args().Get(1)
+		if serviceName == "" {
+			internal.ShowSubcommandHelpAndError(c, errors.New("missing <service>?"))
+		}
+
+		backupPath := c.Args().Get(2)
+		if backupPath == "" {
+			internal.ShowSubcommandHelpAndError(c, errors.New("missing <file>?"))
+		}
+
+		restorePath := c.Args().Get(3)
+		if restorePath == "" {
+			internal.ShowSubcommandHelpAndError(c, errors.New("missing <path>?"))
+		}
+
+		if _, err := os.Stat(backupPath); err != nil {
+			if os.IsNotExist(err) {
+				logrus.Fatalf("%s doesn't exist?", backupPath)
+			}
+		}
+
+		recipe, err := recipe.Get(app.Recipe)
+		if err != nil {
+			logrus.Fatal(err)
+		}
+
+		restoreConfigs := make(map[string]restoreConfig)
+		for _, service := range recipe.Config.Services {
+			if restoreEnabled, ok := service.Deploy.Labels["backupbot.restore"]; ok {
+				if restoreEnabled == "true" {
+					fullServiceName := fmt.Sprintf("%s_%s", app.StackName(), service.Name)
+					rsConfig := restoreConfig{}
+
+					logrus.Debugf("restore config detected for %s", fullServiceName)
+
+					if preHookCmd, ok := service.Deploy.Labels["backupbot.restore.pre-hook"]; ok {
+						logrus.Debugf("detected pre-hook command for %s: %s", fullServiceName, preHookCmd)
+						rsConfig.preHookCmd = preHookCmd
+					}
+
+					if postHookCmd, ok := service.Deploy.Labels["backupbot.restore.post-hook"]; ok {
+						logrus.Debugf("detected post-hook command for %s: %s", fullServiceName, postHookCmd)
+						rsConfig.postHookCmd = postHookCmd
+					}
+
+					restoreConfigs[service.Name] = rsConfig
+				}
+			}
+		}
+
+		rsConfig, ok := restoreConfigs[serviceName]
+		if !ok {
+			rsConfig = restoreConfig{}
+		}
+		if err := runRestore(app, backupPath, restorePath, serviceName, rsConfig); err != nil {
+			logrus.Fatal(err)
+		}
+
+		return nil
+	},
+}
+
+// runRestore does the actual restore logic.
+func runRestore(app config.App, backupPath, restorePath, serviceName string, rsConfig restoreConfig) error {
+	cl, err := client.New(app.Server)
+	if err != nil {
+		return err
+	}
+
+	// FIXME: avoid instantiating a new CLI
+	dcli, err := command.NewDockerCli()
+	if err != nil {
+		return err
+	}
+
+	filters := filters.NewArgs()
+	filters.Add("name", fmt.Sprintf("^%s_%s", app.StackName(), serviceName))
+
+	targetContainer, err := containerPkg.GetContainer(context.Background(), cl, filters, true)
+	if err != nil {
+		return err
+	}
+
+	fullServiceName := fmt.Sprintf("%s_%s", app.StackName(), serviceName)
+	if rsConfig.preHookCmd != "" {
+		splitCmd := internal.SafeSplit(rsConfig.preHookCmd)
+
+		logrus.Debugf("split pre-hook command for %s into %s", fullServiceName, splitCmd)
+
+		preHookExecOpts := types.ExecConfig{
+			AttachStderr: true,
+			AttachStdin:  true,
+			AttachStdout: true,
+			Cmd:          splitCmd,
+			Detach:       false,
+			Tty:          true,
+		}
+
+		if err := container.RunExec(dcli, cl, targetContainer.ID, &preHookExecOpts); err != nil {
+			return err
+		}
+
+		logrus.Infof("succesfully ran %s pre-hook command: %s", fullServiceName, rsConfig.preHookCmd)
+	}
+
+	backupReader, err := os.Open(backupPath)
+	if err != nil {
+		return err
+	}
+
+	content, err := archive.DecompressStream(backupReader)
+	if err != nil {
+		return err
+	}
+
+	copyOpts := types.CopyToContainerOptions{AllowOverwriteDirWithFile: false, CopyUIDGID: false}
+	if err := cl.CopyToContainer(context.Background(), targetContainer.ID, restorePath, content, copyOpts); err != nil {
+		return err
+	}
+
+	logrus.Infof("restored %s to %s:%s", backupPath, fullServiceName, restorePath)
+
+	if rsConfig.postHookCmd != "" {
+		splitCmd := internal.SafeSplit(rsConfig.postHookCmd)
+
+		logrus.Debugf("split post-hook command for %s into %s", fullServiceName, splitCmd)
+
+		postHookExecOpts := types.ExecConfig{
+			AttachStderr: true,
+			AttachStdin:  true,
+			AttachStdout: true,
+			Cmd:          splitCmd,
+			Detach:       false,
+			Tty:          true,
+		}
+
+		if err := container.RunExec(dcli, cl, targetContainer.ID, &postHookExecOpts); err != nil {
+			return err
+		}
+
+		logrus.Infof("succesfully ran %s post-hook command: %s", fullServiceName, rsConfig.postHookCmd)
+	}
+
+	return nil
+}