dfad1b551d
When accessing libvirtd over a SSH tunnel, the remote driver needs a way to proxy the SSH input/output stream to a suitable libvirt daemon. This is currently done by spawning netcat, pointing it to the libvirtd socket path. This is problematic for a number of reasons: - The socket path varies according to the --prefix chosen at build time. The remote client is seeing the local prefix, but what we need is the remote prefix - The socket path varies according to remote env variables, such as the XDG_RUNTIME_DIR location. Again we see the local XDG_RUNTIME_DIR value, but what we need is the remote value (if any) - The remote driver doesn't know whether it must connect to the legacy libvirtd or the modular daemons, so must always assume legacy libvirtd for back-compat. This means we'll always end up using the virtproxyd daemon adding an extra hop in the RPC layer. - We can not able to autospawn the libvirtd daemon for session mode access To address these problems this patch introduces the 'virtd-ssh-helper' program which takes the URI for the remote driver as a CLI parameter. It then figures out which daemon to connect to and its socket path, using the same code that the remote driver client would on the remote host's build of libvirt. Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Libvirt API for virtualization
Libvirt provides a portable, long term stable C API for managing the virtualization technologies provided by many operating systems. It includes support for QEMU, KVM, Xen, LXC, bhyve, Virtuozzo, VMware vCenter and ESX, VMware Desktop, Hyper-V, VirtualBox and the POWER Hypervisor.
For some of these hypervisors, it provides a stateful management daemon which runs on the virtualization host allowing access to the API both by non-privileged local users and remote users.
Layered packages provide bindings of the libvirt C API into other languages including Python, Perl, PHP, Go, Java, OCaml, as well as mappings into object systems such as GObject, CIM and SNMP.
Further information about the libvirt project can be found on the website:
License
The libvirt C API is distributed under the terms of GNU Lesser General Public License, version 2.1 (or later). Some parts of the code that are not part of the C library may have the more restrictive GNU General Public License, version 2.0 (or later). See the files COPYING.LESSER and COPYING for full license terms & conditions.
Installation
Instructions on building and installing libvirt can be found on the website:
https://libvirt.org/compiling.html
Contributing
The libvirt project welcomes contributions in many ways. For most components the best way to contribute is to send patches to the primary development mailing list. Further guidance on this can be found on the website:
https://libvirt.org/contribute.html
Contact
The libvirt project has two primary mailing lists:
- libvirt-users@redhat.com (for user discussions)
- libvir-list@redhat.com (for development only)
Further details on contacting the project are available on the website: