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a172d25f86
Add slirp4netns to pasta migration in `podman system migrate`. When run, it changes the NetMode from slirp4netns to pasta and removes any slirp4netns network options. Warns about options that cannot be mapped to pasta (e.g. cidr, allow_host_loopback). The config is persisted via RewriteContainerConfig. Signed-off-by: Lokesh Mandvekar <lsm5@redhat.com>
102 lines
3.0 KiB
Go
102 lines
3.0 KiB
Go
//go:build !remote && (linux || freebsd)
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package libpod
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import (
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"fmt"
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"path/filepath"
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"strings"
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"github.com/containers/podman/v6/libpod/define"
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"github.com/containers/podman/v6/pkg/namespaces"
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"github.com/sirupsen/logrus"
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)
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// Migrate stops the rootless pause process and performs any necessary database
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// migrations that are required. It can also migrate all containers to a new OCI
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// runtime, if requested.
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func (r *Runtime) Migrate(newRuntime string) error {
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// Acquire the alive lock and hold it.
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// Ensures that we don't let other Podman commands run while we are
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// rewriting things in the DB.
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aliveLock, err := r.getRuntimeAliveLock()
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if err != nil {
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return fmt.Errorf("retrieving alive lock: %w", err)
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}
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aliveLock.Lock()
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defer aliveLock.Unlock()
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if !r.valid {
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return define.ErrRuntimeStopped
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}
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runningContainers, err := r.GetRunningContainers()
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if err != nil {
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return err
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}
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allCtrs, err := r.state.AllContainers(false)
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if err != nil {
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return err
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}
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logrus.Infof("Stopping all containers")
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for _, ctr := range runningContainers {
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fmt.Printf("stopped %s\n", ctr.ID())
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if err := ctr.Stop(); err != nil {
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return fmt.Errorf("cannot stop container %s: %w", ctr.ID(), err)
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}
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}
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// Did the user request a new runtime?
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runtimeChangeRequested := newRuntime != ""
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var requestedRuntime OCIRuntime
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if runtimeChangeRequested {
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runtime, exists := r.ociRuntimes[newRuntime]
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if !exists {
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return fmt.Errorf("change to runtime %q requested but no such runtime is defined: %w", newRuntime, define.ErrInvalidArg)
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}
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requestedRuntime = runtime
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}
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for _, ctr := range allCtrs {
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needsWrite := false
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// Reset pause process location
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oldLocation := filepath.Join(ctr.state.RunDir, "conmon.pid")
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if ctr.config.ConmonPidFile == oldLocation {
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logrus.Infof("Changing conmon PID file for %s", ctr.ID())
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ctr.config.ConmonPidFile = filepath.Join(ctr.config.StaticDir, "conmon.pid")
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needsWrite = true
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}
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// Migrate slirp4netns containers to pasta
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if ctr.config.NetMode == "slirp4netns" || strings.HasPrefix(string(ctr.config.NetMode), "slirp4netns:") {
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logrus.Infof("Migrating container %s from slirp4netns to pasta", ctr.ID())
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if opts, ok := ctr.config.NetworkOptions["slirp4netns"]; ok && len(opts) > 0 {
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logrus.Warnf("Container %s: dropping slirp4netns options %v; see podman-run(1) pasta section for equivalent options", ctr.ID(), opts)
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}
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ctr.config.NetMode = namespaces.NetworkMode("pasta")
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delete(ctr.config.NetworkOptions, "slirp4netns")
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needsWrite = true
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}
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// Reset runtime
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if runtimeChangeRequested && ctr.config.OCIRuntime != newRuntime {
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logrus.Infof("Resetting container %s runtime to runtime %s", ctr.ID(), newRuntime)
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ctr.config.OCIRuntime = newRuntime
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ctr.ociRuntime = requestedRuntime
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needsWrite = true
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}
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if needsWrite {
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if err := r.state.RewriteContainerConfig(ctr, ctr.config); err != nil {
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return fmt.Errorf("rewriting config for container %s: %w", ctr.ID(), err)
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}
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}
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}
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return r.stopPauseProcess()
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}
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