ceph-volume: disable cache for blkid calls

Due to bugs in cache managment in blkid, there are possible to have
nonexistence entries. This entries breaks ceph-volume operations by
passing two or more outputs instead of one (eg. /dev/sdk2).

Fixes: https://tracker.ceph.com/issues/48464
Signed-off-by: Rafał Wądołowski <rwadolowski@cloudferro.com>
(cherry picked from commit 90ed2e03198edec4a61dd9d6010e8d7b306b5f3a)

diff --git a/src/ceph-volume/ceph_volume/util/disk.py b/src/ceph-volume/ceph_volume/util/disk.py
index 2cf18cb5249748a675c34d7de7b9520c85bb1112..f222109b83cca7c8a4377701dc45171733c2a70a 100644 (file)
--- a/src/ceph-volume/ceph_volume/util/disk.py
+++ b/src/ceph-volume/ceph_volume/util/disk.py
@@ -24,7 +24,7 @@ def get_partuuid(device):
     device
     """
     out, err, rc = process.call(
-        ['blkid', '-s', 'PARTUUID', '-o', 'value', device]
+        ['blkid', '-c', '/dev/null', '-s', 'PARTUUID', '-o', 'value', device]
     )
     return ' '.join(out).strip()
 
@@ -98,7 +98,7 @@ def blkid(device):
     PART_ENTRY_UUID                 PARTUUID
     """
     out, err, rc = process.call(
-        ['blkid', '-p', device]
+        ['blkid', '-c', '/dev/null', '-p', device]
     )
     return _blkid_parser(' '.join(out))
 
@@ -110,7 +110,7 @@ def get_part_entry_type(device):
     used for udev rules, but it is useful in this case as it is the only
     consistent way to retrieve the GUID used by ceph-disk to identify devices.
     """
-    out, err, rc = process.call(['blkid', '-p', '-o', 'udev', device])
+    out, err, rc = process.call(['blkid', '-c', '/dev/null', '-p', '-o', 'udev', device])
     for line in out:
         if 'ID_PART_ENTRY_TYPE=' in line:
             return line.split('=')[-1].strip()
@@ -123,7 +123,7 @@ def get_device_from_partuuid(partuuid):
     device is
     """
     out, err, rc = process.call(
-        ['blkid', '-t', 'PARTUUID="%s"' % partuuid, '-o', 'device']
+        ['blkid', '-c', '/dev/null', '-t', 'PARTUUID="%s"' % partuuid, '-o', 'device']
     )
     return ' '.join(out).strip()