Update obsolete libvirt module error message (kevoreilly#2916)

* Modernise obsolute error message

* remove references to libvirt_installer

* reword message

Author: ncatlin

docs/book/src/usage/start.rst

@@ -48,9 +48,8 @@ If you used poetry to install dependencies, you should launch cape with the foll
 
         $ sudo -u cape poetry run python3 cuckoo.py
 
-If you get any dependency-related error, make sure you execute the **extra/libvirt_installer.sh** script::
+If you get any dependency-related error, make sure the cape service is using the python environment configured by the installer.
 
-        $ sudo -u cape poetry run extra/libvirt_installer.sh
 
 Troubleshooting
 ===============

lib/cuckoo/common/abstracts.py

@@ -435,7 +435,7 @@ class LibVirtMachinery(Machinery):
     def __init__(self):
         if not HAVE_LIBVIRT:
             raise CuckooDependencyError(
-                "Unable to import libvirt. Ensure that you properly installed it by running: cd /opt/CAPEv2/ ; sudo -u cape poetry run extra/libvirt_installer.sh"
+                "Unable to import libvirt. Ensure cape is being run from the same python environment configured by the installer script."
             )
 
         super().__init__()

lib/cuckoo/core/startup.py

@@ -332,8 +332,8 @@ def check_snapshot_state():
         from xml.etree import ElementTree
     except ImportError:
         raise CuckooStartupError(
-            "The 'libvirt-python' library is required for KVM/QEMU machinery but is not installed. "
-            "Please install it (e.g., 'cd /opt/CAPEv2/ ; sudo -u cape /etc/poetry/bin/poetry run extra/libvirt_installer.sh')."
+            "The 'libvirt-python' library is required for KVM/QEMU machinery but could not be imported. "
+            "Please ensure that CAPE is being launched by the same Python environment configured by the install script."
         )
 
     machinery_config = Config(cuckoo.cuckoo.machinery)

web/guac/views.py

@@ -8,7 +8,7 @@
 
     LIBVIRT_AVAILABLE = True
 except ImportError:
-    print("Missed python-libvirt. Use extra/libvirt_installer.sh")
+    print("Unable to import python-libvirt. Check that the CAPE python environment has it installed.")
     LIBVIRT_AVAILABLE = False
 
 machinery = Config().cuckoo.machinery