diff --git a/confluent_server/bin/osimage b/confluent_server/bin/osimage
index fb0cd0a0..7b4dbf2f 100644
--- a/confluent_server/bin/osimage
+++ b/confluent_server/bin/osimage
@@ -136,8 +136,12 @@ def initialize(cmdset):
         if res:
             sys.stderr.write('Error occurred while packing site initramfs')
             sys.exit(1)
+    tmptarname = tmpname.replace('cpio', 'tgz')
+    tarcmd = ['tar', 'czf', tmptarname] + topack
+    subprocess.check_call(tarcmd)
     os.chdir(opath)
     os.rename(tmpname, '/var/lib/confluent/public/site/initramfs.cpio')
+    os.rename(tmptarname, '/var/lib/confluent/public/site/initramfs.tgz')
     if cmdset.k:
         with open('/etc/ssh/ssh_known_hosts', 'a+b') as skh:
             for cafile in glob.glob('/var/lib/confluent/public/site/ssh/*.ca'):
@@ -149,7 +153,7 @@ def initialize(cmdset):
     # ok, also need to think on how to handle getinstalldisk
     if not os.path.exists('/etc/confluent/srvcert.pem'):
         subprocess.check_call(['collective', 'gencert'])
-    # TODO: check selinux and segetbool for httpd_can_network_connect 
+    # TODO: check selinux and segetbool for httpd_can_network_connect
     # tftp-server available and enabled?
     # httpd available and enabled?