add show config option and update docs

Change-Id: If5a3b1c1f96be4300c8b75998e84f1609bc31802

doc/source/installation.rst

@@ -79,6 +79,7 @@ Super quick installation on Ubuntu/Debian
     $ git clone git://git.openstack.org/stackforge/vmtp
     $ cd vmtp
     $ pip install -r requirements-dev.txt
+    $ cd vmtp
     $ python vmtp.py -h
 
 Super quick installation on RHEL/CentOS
@@ -94,6 +95,7 @@ Super quick installation on RHEL/CentOS
     $ git clone git://git.openstack.org/stackforge/vmtp
     $ cd vmtp
     $ pip install -r requirements-dev.txt
+    $ cd vmtp
     $ python vmtp.py -h
 
 
@@ -107,7 +109,7 @@ First, download XCode from App Store, then execute below commands:
 .. code-block:: bash
 
     $ # Download the XCode command line tools
-    $ code-select --install
+    $ xcode-select --install
     $ # Install pip
     $ sudo easy_install pip
     $ # Install python virtualenv
@@ -118,4 +120,5 @@ First, download XCode from App Store, then execute below commands:
     $ git clone git://git.openstack.org/stackforge/vmtp
     $ cd vmtp
     $ pip install -r requirements-dev.txt
+    $ cd vmtp
     $ python vmtp.py -h

doc/source/usage.rst

@@ -7,10 +7,10 @@ VMTP Usage
 
 .. code::
 
-    usage: vmtp.py [-h] [-c <config_file>] [-r <openrc_file>]
+    usage: vmtp.py [-h] [-c <config_file>] [-sc] [-r <openrc_file>]
                    [-m <gmond_ip>[:<port>]] [-p <password>] [-t <time>]
                    [--host <user>@<host_ssh_ip>[:<password>:<server-listen-if-name>]]
-                   [--external-host <user>@<host_ssh_ip>[:password>]]
+                   [--external-host <user>@<host_ssh_ip>[:<password>]]
                    [--controller-node <user>@<host_ssh_ip>[:<password>]]
                    [--mongod-server <server ip>] [--json <file>]
                    [--tp-tool <nuttcp|iperf>] [--hypervisor [<az>:] <hostname>]
@@ -25,6 +25,7 @@ VMTP Usage
       -h, --help            show this help message and exit
       -c <config_file>, --config <config_file>
                             override default values with a config file
+      -sc, --show-cofig     print the default config
       -r <openrc_file>, --rc <openrc_file>
                             source OpenStack credentials from rc file
       -m <gmond_ip>[:<port>], --monitor <gmond_ip>[:<port>]

vmtp/vmtp.py

@@ -647,6 +647,11 @@ def parse_opts_from_cli():
                         help='override default values with a config file',
                         metavar='<config_file>')
 
+    parser.add_argument('-sc', '--show-config', dest='show_cofig',
+                        default=False,
+                        action='store_true',
+                        help='print the default config')
+
     parser.add_argument('-r', '--rc', dest='rc',
                         action='store',
                         help='source OpenStack credentials from rc file',
@@ -812,6 +817,11 @@ def merge_opts_to_configs(opts):
     if opts.config:
         config = _merge_config(opts.config, config, required=True)
 
+    if opts.show_cofig:
+        print default_cfg_file
+        sys.exit(0)
+
+
     if opts.version:
         print(__version__)
         sys.exit(0)