diff options
| -rw-r--r-- | libpod/networking_linux.go | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/libpod/networking_linux.go b/libpod/networking_linux.go index 48b0c495c..15639aac4 100644 --- a/libpod/networking_linux.go +++ b/libpod/networking_linux.go @@ -177,6 +177,21 @@ func (r *RootlessCNI) Do(toRun func() error) error { if err != nil { return err } + logrus.Debugf("The actual path of /etc/resolv.conf on the host is %q", resolvePath) + // When /etc/resolv.conf on the host is a symlink to /run/systemd/resolve/stub-resolv.conf, + // we have to mount an empty filesystem on /run/systemd/resolve in the child namespace, + // so as to isolate the directory from the host mount namespace. + // + // Otherwise our bind-mount for /run/systemd/resolve/stub-resolv.conf is unmounted + // when systemd-resolved unlinks and recreates /run/systemd/resolve/stub-resolv.conf on the host. + // see: https://github.com/containers/podman/issues/10929 + if strings.HasPrefix(resolvePath, "/run/systemd/resolve/") { + rsr := r.getPath("/run/systemd/resolve") + err = unix.Mount("", rsr, "tmpfs", unix.MS_NOEXEC|unix.MS_NOSUID|unix.MS_NODEV, "") + if err != nil { + return errors.Wrapf(err, "failed to mount tmpfs on %q for rootless cni", rsr) + } + } if strings.HasPrefix(resolvePath, "/run/") { resolvePath = r.getPath(resolvePath) err = os.MkdirAll(filepath.Dir(resolvePath), 0700) |