[lxd][runtime] Add LXD Runtime

Signed-off-by: Arif Ali <[email protected]>

sos/policies/distros/__init__.py

@@ -20,6 +20,7 @@
 from sos.policies.runtimes.crio import CrioContainerRuntime
 from sos.policies.runtimes.podman import PodmanContainerRuntime
 from sos.policies.runtimes.docker import DockerContainerRuntime
+from sos.policies.runtimes.lxd import LxdContainerRuntime
 
 from sos.utilities import (shell_out, is_executable, bold,
                            sos_get_command_output)
@@ -95,7 +96,8 @@ def __init__(self, sysroot=None, init=None, probe_runtime=True,
             _crun = [
                 PodmanContainerRuntime(policy=self),
                 DockerContainerRuntime(policy=self),
-                CrioContainerRuntime(policy=self)
+                CrioContainerRuntime(policy=self),
+                LxdContainerRuntime(policy=self),
             ]
             for runtime in _crun:
                 if runtime.check_is_active():

sos/policies/runtimes/lxd.py

@@ -0,0 +1,148 @@
+# Copyright (C) 2023 Canonical Ltd., Arif Ali <[email protected]>
+
+# This file is part of the sos project: https://github.com/sosreport/sos
+#
+# This copyrighted material is made available to anyone wishing to use,
+# modify, copy, or redistribute it subject to the terms and conditions of
+# version 2 of the GNU General Public License.
+#
+# See the LICENSE file in the source distribution for further information.
+
+import json
+
+from sos.policies.runtimes import ContainerRuntime
+from sos.utilities import sos_get_command_output
+from sos.utilities import is_executable
+
+
+class LxdContainerRuntime(ContainerRuntime):
+    """Runtime class to use for systems running LXD"""
+
+    name = 'lxd'
+    binary = 'lxc'
+
+    def check_is_active(self, sysroot=None):
+        # the daemon must be running
+        if (is_executable('lxc', sysroot) and
+                (self.policy.init_system.is_running('lxd') or
+                 self.policy.init_system.is_running('snap.lxd.daemon'))):
+            self.active = True
+            return True
+        return False
+
+    def get_containers(self, get_all=False):
+        """Get a list of containers present on the system.
+
+        :param get_all: If set, include stopped containers as well
+        :type get_all: ``bool``
+        """
+        containers = []
+
+        _cmd = "%s list --format json" % (self.binary)
+        if self.active:
+            out = sos_get_command_output(_cmd, chroot=self.policy.sysroot)
+
+            if out["status"] == 0:
+                out_json = json.loads(out["output"])
+
+                for container in out_json:
+                    if container['status'] == 'Running' or get_all:
+                        # takes the form (container_id, container_name)
+                        containers.append(
+                            (container['expanded_config']['volatile.uuid'],
+                             container['name']))
+
+        return containers
+
+    def get_images(self):
+        """Get a list of images present on the system
+
+        :returns: A list of 2-tuples containing (image_name, image_id)
+        :rtype: ``list``
+        """
+        images = []
+        if self.active:
+            out = sos_get_command_output(
+                f"{self.binary} image list --format json",
+                chroot=self.policy.sysroot
+            )
+            if out['status'] == 0:
+                out_json = json.loads(out["output"])
+                for ent in out_json:
+                    # takes the form (image_name, image_id)
+                    images.append((
+                        ent['update_source']['alias'],
+                        ent['fingerprint']))
+        return images
+
+    def get_volumes(self):
+        """Get a list of container volumes present on the system
+
+        :returns: A list of volume IDs on the system
+        :rtype: ``list``
+        """
+        vols = []
+        if self.active:
+
+            # first get the default storage pool
+            out = sos_get_command_output(
+                f"{self.binary} profile list --format json",
+                chroot=self.policy.sysroot
+            )
+            if out['status'] == 0:
+                out_json = json.loads(out['output'])
+                for profile in out_json:
+                    if profile['name'] == 'default':
+                        stg_pool = profile['devices']['root']['pool']
+                        break
+
+            out = sos_get_command_output(
+                f"{self.binary} storage volume list {stg_pool} --format json",
+                chroot=self.policy.sysroot
+            )
+            if out['status'] == 0:
+                out_json = json.loads(out['output'])
+                for ent in out_json:
+                    vols.append(ent['name'])
+        return vols
+
+    def get_logs_command(self, container):
+        """Get the command string used to dump container logs from the
+        runtime
+
+        :param container: The name or ID of the container to get logs for
+        :type container: ``str``
+
+        :returns: Formatted runtime command to get logs from `container`
+        :type: ``str``
+        """
+        return f"{self.binary} info {container} --show-log"
+
+    def get_copy_command(self, container, path, dest, sizelimit=None):
+        """Generate the command string used to copy a file out of a container
+        by way of the runtime.
+
+        :param container:   The name or ID of the container
+        :type container:    ``str``
+
+        :param path:        The path to copy from the container. Note that at
+                            this time, no supported runtime supports globbing
+        :type path:         ``str``
+
+        :param dest:        The destination on the *host* filesystem to write
+                            the file to
+        :type dest:         ``str``
+
+        :param sizelimit:   Limit the collection to the last X bytes of the
+                            file at PATH
+        :type sizelimit:    ``int``
+
+        :returns:   Formatted runtime command to copy a file from a container
+        :rtype:     ``str``
+        """
+        if sizelimit:
+            return f"{self.run_cmd} {container} tail -c {sizelimit} {path}"
+        return f"{self.binary} file pull {container} {path} {dest}"
+
+
+# vim: set et ts=4 sw=4 :