cli: Add clean and status subcommands

The 'cloud-init clean' command allows a user or script to clear cloud-init
artifacts from the system so that cloud-init sees the system as
unconfigured upon reboot. Optional parameters can be provided to remove
cloud-init logs and reboot after clean.

The 'cloud-init status' command allows the user or script to check whether
cloud-init has finished all configuration stages and whether errors
occurred. An optional --wait argument will poll on a 0.25 second interval
until cloud-init configuration is complete. The benefit here is scripts
can block on cloud-init completion before performing post-config tasks.

1 files changed, 11 insertions, 5 deletions

diff --git a/cloudinit/distros/__init__.py b/cloudinit/distros/__init__.py
index d5becd12..99e60e7a 100755
--- a/cloudinit/distros/__init__.py
+++ b/cloudinit/distros/__init__.py
@@ -102,11 +102,8 @@ class Distro(object):
         self._apply_hostname(writeable_hostname)
 
     def uses_systemd(self):
-        try:
-            res = os.lstat('/run/systemd/system')
-            return stat.S_ISDIR(res.st_mode)
-        except Exception:
-            return False
+        """Wrapper to report whether this distro uses systemd or sysvinit."""
+        return uses_systemd()
 
     @abc.abstractmethod
     def package_command(self, cmd, args=None, pkgs=None):
@@ -761,4 +758,13 @@ def set_etc_timezone(tz, tz_file=None, tz_conf="/etc/timezone",
             util.copy(tz_file, tz_local)
     return
 
+
+def uses_systemd():
+    try:
+        res = os.lstat('/run/systemd/system')
+        return stat.S_ISDIR(res.st_mode)
+    except Exception:
+        return False
+
+
 # vi: ts=4 expandtab