mirror of
https://github.com/psviderski/uncloud.git
synced 2026-08-26 11:03:34 +00:00
refactor(cli): move cmd/uncloud to cmd/uc, change the artifact name uncloud_* -> uc_*
This commit is contained in:
Pasha Sviderski
@@ -0,0 +1,274 @@
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package machine
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import (
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"context"
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"errors"
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"fmt"
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"maps"
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"slices"
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"strings"
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"sync"
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"charm.land/lipgloss/v2"
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"charm.land/lipgloss/v2/tree"
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"github.com/docker/compose/v2/pkg/progress"
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"github.com/docker/docker/api/types/container"
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"github.com/psviderski/uncloud/internal/cli"
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"github.com/psviderski/uncloud/internal/cli/completion"
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"github.com/psviderski/uncloud/internal/cli/tui"
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"github.com/psviderski/uncloud/internal/machine/api/pb"
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"github.com/psviderski/uncloud/pkg/api"
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"github.com/spf13/cobra"
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)
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type removeOptions struct {
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noReset bool
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yes bool
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}
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func NewRmCommand() *cobra.Command {
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opts := removeOptions{}
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cmd := &cobra.Command{
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Use: "rm MACHINE",
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Aliases: []string{"remove", "delete"},
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Short: "Remove a machine from a cluster and reset it.",
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Args: cobra.ExactArgs(1),
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RunE: func(cmd *cobra.Command, args []string) error {
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uncli := cmd.Context().Value("cli").(*cli.CLI)
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return remove(cmd.Context(), uncli, args[0], opts)
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},
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ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]cobra.Completion, cobra.ShellCompDirective) {
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if len(args) > 0 {
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return nil, cobra.ShellCompDirectiveNoFileComp
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}
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uncli := cmd.Context().Value("cli").(*cli.CLI)
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return completion.Machines(cmd.Context(), uncli, args, toComplete)
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},
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}
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cmd.Flags().BoolVarP(&opts.yes, "yes", "y", false,
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"Do not prompt for confirmation before removing the machine.")
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cmd.Flags().BoolVar(&opts.noReset, "no-reset", false,
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"Do not reset the machine after removing it from the cluster. This will leave all containers and data intact.")
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return cmd
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}
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func remove(ctx context.Context, uncli *cli.CLI, nameOrID string, opts removeOptions) error {
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// TODO: automatically choose a connection to the machine that is not being removed.
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client, err := uncli.ConnectCluster(ctx)
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if err != nil {
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return fmt.Errorf("connect to cluster: %w", err)
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}
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defer client.Close()
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// Verify the machine exists in the cluster.
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member, err := client.InspectMachine(ctx, nameOrID)
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if err != nil {
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return fmt.Errorf("inspect machine '%s': %w", nameOrID, err)
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}
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m := member.Machine
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// Create a proxy context for the machine being removed.
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// This is used for calls that need to run directly on that machine.
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rmCtx := client.ProxySingleMachineContext(ctx, m.Id)
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// Verify if the machine being removed is the proxy machine we're connected to.
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proxyMachine, err := client.MachineClient.Inspect(ctx, nil)
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if err != nil {
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return fmt.Errorf("inspect proxy machine: %w", err)
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}
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if proxyMachine.Id == m.Id {
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allMachines, err := client.ListMachines(ctx, nil)
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if err != nil {
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return fmt.Errorf("list machines: %w", err)
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}
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if len(allMachines) > 1 {
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return fmt.Errorf("cannot remove the machine you are currently connected to. "+
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"Please connect to another machine in the cluster and try again. "+
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"Change the default connection for the current cluster using 'uc ctx conn' or "+
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"manually update 'connections' in your Uncloud config (%s). "+
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"For more information on connecting to a cluster, see "+
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"https://uncloud.run/docs/concepts/clusters/connecting/", uncli.Config.Path())
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// It's ok to remove the proxy machine if it's the last one in the cluster.
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}
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}
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// TODO: mark the machine as being removed and unschedulable when this is possible to prevent new containers
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// from being scheduled on it while the removal is in progress.
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reset := !opts.noReset
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var containers []api.ServiceContainer
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reachable := false
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if reset {
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// Check if the machine is up and has service containers.
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listOpts := container.ListOptions{All: true}
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machineContainers, err := client.Docker.ListServiceContainers(rmCtx, "", listOpts)
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if err == nil {
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reachable = true
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containers = machineContainers[0].Containers
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if len(containers) > 0 {
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plural := ""
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if len(containers) > 1 {
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plural = "s"
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}
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fmt.Printf("Found %d service container%s on machine '%s':\n", len(containers), plural, m.Name)
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lipgloss.Println(formatContainerTree(containers))
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fmt.Println()
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fmt.Println("This will remove all service containers from the machine, remove it from the cluster, " +
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"and reset it to the uninitialised state.")
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} else {
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fmt.Printf("No service containers found on machine '%s'.\n", m.Name)
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fmt.Println("This will remove the machine from the cluster and reset it to the uninitialised state.")
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}
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} else {
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fmt.Printf("This will remove machine '%s' from the cluster without resetting it as it's unreachable.\n",
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m.Name)
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}
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} else {
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fmt.Printf("This will remove machine '%s' from the cluster without resetting it.\n", m.Name)
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}
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if !opts.yes {
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confirmed, err := tui.Confirm("")
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if err != nil {
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return fmt.Errorf("confirm removal: %w", err)
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}
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if !confirmed {
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fmt.Println("Cancelled. Machine was not removed.")
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return nil
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}
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}
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if reset && len(containers) > 0 {
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err = progress.RunWithTitle(ctx, func(ctx context.Context) error {
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return removeContainers(ctx, client, containers)
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}, uncli.ProgressOut(), "Removing containers")
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if err != nil {
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return fmt.Errorf("remove containers: %w", err)
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}
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fmt.Println()
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}
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// Initiate reset before removing the machine from the cluster to stop it from updating the cluster store.
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// This is still optimistic as Reset only triggers the reset process that runs asynchronously.
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if reset && reachable {
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_, err = client.MachineClient.Reset(rmCtx, &pb.ResetRequest{})
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if err != nil {
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tui.PrintWarning(fmt.Sprintf("Failed to reset machine: %v\n", err))
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} else {
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fmt.Println("Machine reset initiated and will complete in the background.")
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}
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}
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if _, err = client.RemoveMachine(ctx, &pb.RemoveMachineRequest{Id: m.Id}); err != nil {
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return fmt.Errorf("remove machine from cluster: %w", err)
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}
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fmt.Printf("Machine '%s' removed from the cluster.\n", m.Name)
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// Remove the connection to the machine from the uncloud config if it exists.
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if uncli.Config != nil {
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contextName := uncli.ContextOverrideOrCurrent()
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if context, ok := uncli.Config.Contexts[contextName]; ok {
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for i, c := range context.Connections {
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if c.MachineID == m.Id {
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context.Connections = slices.Delete(context.Connections, i, i+1)
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break
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}
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}
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if err := uncli.Config.Save(); err != nil {
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return fmt.Errorf("save config: %w", err)
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}
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}
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}
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// TODO: If Caddy was running on this machine and a cluster domain is reserved,
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// let the user know that the DNS records should be updated.
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return nil
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}
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// formatContainerTree formats a list of containers grouped by service as a tree structure.
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func formatContainerTree(containers []api.ServiceContainer) string {
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if len(containers) == 0 {
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return ""
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}
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// Group containers by service.
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serviceContainers := make(map[string][]api.ServiceContainer)
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for _, ctr := range containers {
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serviceName := ctr.ServiceName()
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serviceContainers[serviceName] = append(serviceContainers[serviceName], ctr)
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}
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// Build tree output.
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var output []string
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serviceNames := slices.Sorted(maps.Keys(serviceContainers))
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for _, serviceName := range serviceNames {
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ctrs := serviceContainers[serviceName]
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mode := ctrs[0].ServiceMode()
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// Format a tree for the service with its containers.
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plural := ""
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if len(ctrs) > 1 {
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plural = "s"
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}
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t := tree.Root(fmt.Sprintf("• %s (%s, %d container%s)", serviceName, mode, len(ctrs), plural)).
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EnumeratorStyle(lipgloss.NewStyle().MarginLeft(2).MarginRight(1))
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// Add containers as children.
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for _, ctr := range ctrs {
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state, _ := ctr.HumanState()
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info := fmt.Sprintf("%s • %s • %s", ctr.Name, tui.FormatImage(ctr.Config.Image, tui.NoStyle), state)
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t.Child(info)
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}
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output = append(output, t.String())
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}
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return strings.Join(output, "\n")
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}
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// removeContainers removes the given service containers from the machine.
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func removeContainers(ctx context.Context, client api.Client, containers []api.ServiceContainer) error {
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if len(containers) == 0 {
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return nil
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}
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wg := sync.WaitGroup{}
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errCh := make(chan error)
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for _, ctr := range containers {
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wg.Add(1)
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go func(c api.ServiceContainer) {
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defer wg.Done()
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// Gracefully stop the container before removing it.
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err := client.StopContainer(ctx, c.ServiceID(), c.ID, container.StopOptions{})
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if err != nil && !errors.Is(err, api.ErrNotFound) {
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errCh <- fmt.Errorf("stop container '%s': %w", c.ID, err)
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}
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err = client.RemoveContainer(ctx, c.ServiceID(), c.ID, container.RemoveOptions{
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// Remove anonymous volumes created by the container.
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RemoveVolumes: true,
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})
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if err != nil && !errors.Is(err, api.ErrNotFound) {
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errCh <- fmt.Errorf("remove container '%s': %w", c.ID, err)
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}
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}(ctr)
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}
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go func() {
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wg.Wait()
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close(errCh)
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}()
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var err error
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for e := range errCh {
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err = errors.Join(err, e)
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}
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return err
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}
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