[lvm2] Capture PV headers and metadata with pvck

Capture PV headers and metadata when a new option,
lvm2.metadata , disabled by default, is specified
as plugin option.

Signed-off-by: Jose Castillo <[email protected]>

sos/report/plugins/lvm2.py

@@ -21,7 +21,9 @@ class Lvm2(Plugin, IndependentPlugin):
         PluginOpt('lvmdump', default=False, desc='collect an lvmdump tarball'),
         PluginOpt('lvmdump-am', default=False,
                   desc=('attempt to collect lvmdump with advanced options and '
-                        'raw metadata'))
+                        'raw metadata')),
+        PluginOpt('metadata', default=False,
+                  desc=('attempt to collect headers and metadata via pvck'))
     ]
 
     def do_lvmdump(self, metadata=False):
@@ -39,6 +41,24 @@ def do_lvmdump(self, metadata=False):
 
         self.add_cmd_output(cmd, chroot=self.tmp_in_sysroot())
 
+    def get_pvck_output(self, metadata=False):
+        """ Collects the output of the command pvck for each block device
+            present in the system.
+        """
+
+        block_list = self.exec_cmd(
+            'pvs -o pv_name --no-headings'
+        )
+        if block_list['status'] == 0:
+            for line in block_list['output'].splitlines():
+                cmds = [
+                    f"pvck --dump headers {line}",
+                    f"pvck --dump metadata {line}",
+                    f"pvck --dump metadata_all {line} -v",
+                    f"pvck --dump metadata_search {line} -v"
+                ]
+                self.add_cmd_output(cmds, subdir="metadata")
+
     def setup(self):
         # When running LVM2 comamnds:
         # - use nolocking if supported, else locking_type 0 (no locks)
@@ -92,4 +112,7 @@ def setup(self):
         elif self.get_option('lvmdump-am'):
             self.do_lvmdump(metadata=True)
 
+        if self.get_option('metadata'):
+            self.get_pvck_output()
+
 # vim: set et ts=4 sw=4 :