diff --git a/_grains/ceph.py b/_grains/ceph.py
index 003fcd0..5df302c 100644
--- a/_grains/ceph.py
+++ b/_grains/ceph.py
@@ -8,84 +8,89 @@
     import os
     import re
 
-    # osd
-    mount_path = check_output("df -h | awk '{print $6}' | grep ceph | grep -v lockbox | sed 's/[0-9]*//g' | awk 'NR==1{print $1}'", shell=True).rstrip()
-    sed = 'sed \'s#{0}##g\''.format(mount_path)
-    cmd = "lsblk -rp | awk '{print $1,$6,$7}' | grep -v lockbox | grep ceph | " + sed
-    osd_output = check_output(cmd, shell=True)
-    grain = {}
-    grain["ceph"] = {}
-    if osd_output:
-        devices = {}
-        for line in osd_output.splitlines():
-            device = line.split()
-            encrypted = False
-            if "crypt" in device[1]:
-                output = check_output("lsblk -rp | grep -B1 " + device[0], shell=True)
-                for l in output.splitlines():
-                    d = l.split()
-                    dev = d[0].replace('1','')
-                    encrypted = True
-                    break
-            else:
-                dev = device[0].replace('1','')
-            device[0] = device[2]
-            devices[device[0]] = {}
-            devices[device[0]]['dev'] = dev
-            if encrypted:
-                devices[device[0]]['dmcrypt'] = 'true'
-            tline = check_output("ceph osd tree | awk '{print $1,$2,$3,$4}' | grep -w 'osd." + device[0] + "'", shell=True)
-            osd = tline.split()
-            if "osd" not in osd[2]:
-                crush_class = osd[1]
-                crush_weight = osd[2]
-                devices[device[0]]['class'] = crush_class
-                devices[device[0]]['weight'] = crush_weight
-            else:
-                crush_weight = osd[1]
-                devices[device[0]]['weight'] = crush_weight
-        grain["ceph"]["ceph_disk"] = devices
+    if os.path.exists('/etc/ceph'):
+        grain = {}
+        grain["ceph"] = {}
 
-    # keyrings
-    directory = '/etc/ceph/'
-    keyrings = {}
-    if os.path.isdir(directory):
-        for filename in os.listdir(directory):
-            if filename.endswith(".keyring") and filename.startswith("ceph.client"):
-                keyring_output = open(os.path.join(directory, filename), "r")
-                keyring_name = re.search('ceph.client.(.+?).keyring', filename).group(1)
-                if keyring_output:
-                    keyrings[keyring_name] = {}
-                    for line in keyring_output:
-                        attr = shlex.split(line)
-                        if attr:
-                            if attr[0] == 'key':
-                                keyrings[keyring_name]['key'] = attr[2]
-                            if attr[0] == 'caps' and 'caps' in keyrings[keyring_name]:
-                                keyrings[keyring_name]['caps'][attr[1]] = attr[3]
-                            elif attr[0] == 'caps' and 'caps' not in keyrings[keyring_name]:
-                                keyrings[keyring_name]['caps'] = {}
-                                keyrings[keyring_name]['caps'][attr[1]] = attr[3]
-        if keyrings:
-            grain["ceph"]["ceph_keyring"] = keyrings
+        # osd
+        if os.path.exists('/var/lib/ceph/osd'):
+            mount_path = check_output("df -h | awk '{print $6}' | grep ceph | grep -v lockbox | sed 's/[0-9]*//g' | awk 'NR==1{print $1}'", shell=True).rstrip()
+            sed = 'sed \'s#{0}##g\''.format(mount_path)
+            cmd = "lsblk -rp | awk '{print $1,$6,$7}' | grep -v lockbox | grep ceph | " + sed
+            osd_output = check_output(cmd, shell=True)
+            if osd_output:
+                devices = {}
+                for line in osd_output.splitlines():
+                    device = line.split()
+                    encrypted = False
+                    if "crypt" in device[1]:
+                        output = check_output("lsblk -rp | grep -B1 " + device[0], shell=True)
+                        for l in output.splitlines():
+                            d = l.split()
+                            dev = d[0].replace('1','')
+                            encrypted = True
+                            break
+                    else:
+                        dev = device[0].replace('1','')
+                    device[0] = device[2]
+                    devices[device[0]] = {}
+                    devices[device[0]]['dev'] = dev
+                    if encrypted:
+                        devices[device[0]]['dmcrypt'] = 'true'
+                    tline = check_output("ceph osd tree | awk '{print $1,$2,$3,$4}' | grep -w 'osd." + device[0] + "'", shell=True)
+                    osd = tline.split()
+                    if "osd" not in osd[2]:
+                        crush_class = osd[1]
+                        crush_weight = osd[2]
+                        devices[device[0]]['class'] = crush_class
+                        devices[device[0]]['weight'] = crush_weight
+                    else:
+                        crush_weight = osd[1]
+                        devices[device[0]]['weight'] = crush_weight
+                grain["ceph"]["ceph_disk"] = devices
 
-    # mon keyring
-    hostname = check_output("hostname", shell=True).rstrip()
-    filepath = "/var/lib/ceph/mon/ceph-{0}/keyring".format(hostname)
-    if os.path.isfile(filepath):
-        mon_key_output = open(filepath, "r")
-        if mon_key_output:
-            keyrings['mon'] = {}
-            for line in mon_key_output:
-                attr = shlex.split(line)
-                if attr:
-                    if attr[0] == 'key':
-                        keyrings['mon']['key'] = attr[2]
-                    if attr[0] == 'caps' and 'caps' in keyrings['mon']:
-                        keyrings['mon']['caps'][attr[1]] = attr[3]
-                    elif attr[0] == 'caps' and 'caps' not in keyrings['mon']:
-                        keyrings['mon']['caps'] = {}
-                        keyrings['mon']['caps'][attr[1]] = attr[3]
-            grain["ceph"]["ceph_keyring"] = keyrings
+        # keyrings
+        directory = '/etc/ceph/'
+        keyrings = {}
+        if os.path.isdir(directory):
+            for filename in os.listdir(directory):
+                if filename.endswith(".keyring") and filename.startswith("ceph.client"):
+                    keyring_output = open(os.path.join(directory, filename), "r")
+                    keyring_name = re.search('ceph.client.(.+?).keyring', filename).group(1)
+                    if keyring_output:
+                        keyrings[keyring_name] = {}
+                        for line in keyring_output:
+                            attr = shlex.split(line)
+                            if attr:
+                                if attr[0] == 'key':
+                                    keyrings[keyring_name]['key'] = attr[2]
+                                if attr[0] == 'caps' and 'caps' in keyrings[keyring_name]:
+                                    keyrings[keyring_name]['caps'][attr[1]] = attr[3]
+                                elif attr[0] == 'caps' and 'caps' not in keyrings[keyring_name]:
+                                    keyrings[keyring_name]['caps'] = {}
+                                    keyrings[keyring_name]['caps'][attr[1]] = attr[3]
+            if keyrings:
+                grain["ceph"]["ceph_keyring"] = keyrings
 
-    return grain
+        # mon keyring
+        hostname = check_output("hostname", shell=True).rstrip()
+        filepath = "/var/lib/ceph/mon/ceph-{0}/keyring".format(hostname)
+        if os.path.isfile(filepath):
+            mon_key_output = open(filepath, "r")
+            if mon_key_output:
+                keyrings['mon'] = {}
+                for line in mon_key_output:
+                    attr = shlex.split(line)
+                    if attr:
+                        if attr[0] == 'key':
+                            keyrings['mon']['key'] = attr[2]
+                        if attr[0] == 'caps' and 'caps' in keyrings['mon']:
+                            keyrings['mon']['caps'][attr[1]] = attr[3]
+                        elif attr[0] == 'caps' and 'caps' not in keyrings['mon']:
+                            keyrings['mon']['caps'] = {}
+                            keyrings['mon']['caps'][attr[1]] = attr[3]
+                grain["ceph"]["ceph_keyring"] = keyrings
+
+        return grain
+    else:
+        return None