IBMCloud: Disable config-drive and nocloud only if IBMCloud is enabled.

Ubuntu images on IBMCloud for 16.04 have some seed data in
/var/lib/cloud/data/seed/nocloud-net.  In order to have systems with
IBMCloud enabled, we modified ds-identify detection to skip that seed
if the system was on IBMCloud.  That change did not consider the
fact that IBMCloud might not be in the datasource list.

There was similar logic in the ConfigDrive datasource in ds-identify
and the datasource itself.

Config drive is now updated to only check and avoid IBMCloud if IBMCloud
is enabled.  The check in ds-identify for nocloud was dropped.  If a
user provides a nocloud seed on IBMCloud, then that can be used.

This means that systems running Xenial will continue to get their
old datasources.

LP: #1766401

1 files changed, 8 insertions, 3 deletions

diff --git a/cloudinit/sources/DataSourceConfigDrive.py b/cloudinit/sources/DataSourceConfigDrive.py
index c7b5fe5f..121cf215 100644
--- a/cloudinit/sources/DataSourceConfigDrive.py
+++ b/cloudinit/sources/DataSourceConfigDrive.py
@@ -69,7 +69,8 @@ class DataSourceConfigDrive(openstack.SourceMixin, sources.DataSource):
                 util.logexc(LOG, "Failed reading config drive from %s", sdir)
 
         if not found:
-            for dev in find_candidate_devs():
+            dslist = self.sys_cfg.get('datasource_list')
+            for dev in find_candidate_devs(dslist=dslist):
                 try:
                     # Set mtype if freebsd and turn off sync
                     if dev.startswith("/dev/cd"):
@@ -211,7 +212,7 @@ def write_injected_files(files):
                 util.logexc(LOG, "Failed writing file: %s", filename)
 
 
-def find_candidate_devs(probe_optical=True):
+def find_candidate_devs(probe_optical=True, dslist=None):
     """Return a list of devices that may contain the config drive.
 
     The returned list is sorted by search order where the first item has
@@ -227,6 +228,9 @@ def find_candidate_devs(probe_optical=True):
         * either vfat or iso9660 formated
         * labeled with 'config-2' or 'CONFIG-2'
     """
+    if dslist is None:
+        dslist = []
+
     # query optical drive to get it in blkid cache for 2.6 kernels
     if probe_optical:
         for device in OPTICAL_DEVICES:
@@ -257,7 +261,8 @@ def find_candidate_devs(probe_optical=True):
     devices = [d for d in candidates
                if d in by_label or not util.is_partition(d)]
 
-    if devices:
+    LOG.debug("devices=%s dslist=%s", devices, dslist)
+    if devices and "IBMCloud" in dslist:
         # IBMCloud uses config-2 label, but limited to a single UUID.
         ibm_platform, ibm_path = get_ibm_platform()
         if ibm_path in devices: