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//go:build !remote
package libpod
import (
"errors"
"fmt"
"os"
"golang.org/x/sys/unix"
"github.com/containers/common/pkg/cgroups"
"github.com/containers/podman/v5/pkg/rootless"
"github.com/containers/podman/v5/pkg/systemd"
"github.com/sirupsen/logrus"
)
func checkCgroups2UnifiedMode(runtime *Runtime) {
unified, _ := cgroups.IsCgroup2UnifiedMode()
// DELETE ON RHEL9
if !unified {
_, ok := os.LookupEnv("PODMAN_IGNORE_CGROUPSV1_WARNING")
if !ok {
logrus.Warn("Using cgroups-v1 which is deprecated in favor of cgroups-v2 with Podman v5 and will be removed in a future version. Set environment variable `PODMAN_IGNORE_CGROUPSV1_WARNING` to hide this warning.")
}
}
// DELETE ON RHEL9
if unified && rootless.IsRootless() && !systemd.IsSystemdSessionValid(rootless.GetRootlessUID()) {
// If user is rootless and XDG_RUNTIME_DIR is found, podman will not proceed with /tmp directory
// it will try to use existing XDG_RUNTIME_DIR
// if current user has no write access to XDG_RUNTIME_DIR we will fail later
if err := unix.Access(runtime.storageConfig.RunRoot, unix.W_OK); err != nil {
msg := fmt.Sprintf("RunRoot is pointing to a path (%s) which is not writable. Most likely podman will fail.", runtime.storageConfig.RunRoot)
if errors.Is(err, os.ErrNotExist) {
// if dir does not exist, try to create it
if err := os.MkdirAll(runtime.storageConfig.RunRoot, 0700); err != nil {
logrus.Warn(msg)
}
} else {
logrus.Warnf("%s: %v", msg, err)
}
}
}
}
// Check the current boot ID against the ID cached in the runtime alive file.
func (r *Runtime) checkBootID(runtimeAliveFile string) error {
systemBootID, err := os.ReadFile("/proc/sys/kernel/random/boot_id")
if err == nil {
podmanBootID, err := os.ReadFile(runtimeAliveFile)
if err != nil {
return fmt.Errorf("reading boot ID from runtime alive file: %w", err)
}
if len(podmanBootID) != 0 {
if string(systemBootID) != string(podmanBootID) {
return fmt.Errorf("current system boot ID differs from cached boot ID; an unhandled reboot has occurred. Please delete directories %q and %q and re-run Podman", r.storageConfig.RunRoot, r.config.Engine.TmpDir)
}
} else {
// Write the current boot ID to the alive file.
if err := os.WriteFile(runtimeAliveFile, systemBootID, 0644); err != nil {
return fmt.Errorf("writing boot ID to runtime alive file: %w", err)
}
}
}
return nil
}
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