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lib
python3
dist-packages
landscape
lib
File Content:
vm_info.py
""" Network introspection utilities using ioctl and the /proc filesystem. """ import os from landscape.lib.fs import read_binary_file, read_text_file DMI_FILES = ("sys_vendor", "chassis_vendor", "bios_vendor", "product_name") def get_vm_info(root_path="/"): """ Return a bytestring with the virtualization type if it's known, an empty bytestring otherwise. It loops through some possible configurations and return a bytestring with the name of the technology being used or None if there's no match """ if _is_vm_openvz(root_path): return b"openvz" if _is_vm_xen(root_path): return b"xen" # Iterate through all dmi *_vendors, as clouds can (and will) customize # sysinfo values. (https://libvirt.org/formatdomain.html#elementsSysinfo) dmi_info_path = os.path.join(root_path, "sys/class/dmi/id") for dmi_info_file in DMI_FILES: dmi_vendor_path = os.path.join(dmi_info_path, dmi_info_file) if not os.path.exists(dmi_vendor_path): continue vendor = _get_vm_by_vendor(dmi_vendor_path) if vendor: return vendor return _get_vm_legacy(root_path) def get_container_info(run_path="/run"): """ Return a string with the type of container the client is running in, if any, an empty string otherwise. """ for filename in ("container_type", "systemd/container"): path = os.path.join(run_path, filename) if os.path.exists(path): return read_text_file(path).strip() return "" def _is_vm_xen(root_path): """Check if the host is virtualized with Xen.""" sys_xen_path = os.path.join(root_path, "sys/bus/xen/devices") # Paravirtualized and HVM instances have device links under the directory return os.path.isdir(sys_xen_path) and os.listdir(sys_xen_path) def _is_vm_openvz(root_path): """Check if the host is virtualized with OpenVZ.""" return os.path.exists(os.path.join(root_path, "proc/vz")) def _get_vm_by_vendor(sys_vendor_path): """Return the VM type byte string (possibly empty) based on the vendor.""" # Use lower-key string for vendors, since we do case-insentive match. # We need bytes here as required by the message schema. vendor = read_binary_file(sys_vendor_path, limit=1024).lower() # 2018-01: AWS and DO are now returning custom sys_vendor names # instead of qemu. If this becomes a trend, it may be worth also checking # dmi/id/chassis_vendor which seems to unchanged (bochs). content_vendors_map = ( (b"amazon ec2", b"kvm"), (b"bochs", b"kvm"), (b"digitalocean", b"kvm"), (b"google", b"gce"), (b"innotek", b"virtualbox"), (b"microsoft", b"hyperv"), (b"nutanix", b"kvm"), (b"openstack", b"kvm"), (b"qemu", b"kvm"), (b"kvm", b"kvm"), (b"vmware", b"vmware"), ) for name, vm_type in content_vendors_map: if name in vendor: return vm_type return b"" def _get_vm_legacy(root_path): """Check if the host is virtualized looking at /proc/cpuinfo content.""" try: cpuinfo = read_text_file(os.path.join(root_path, "proc/cpuinfo")) except (IOError, OSError): return b"" if "qemu" in cpuinfo: return b"kvm" return b""
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