c42c3c6501
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121 lines
3.7 KiB
ReStructuredText
121 lines
3.7 KiB
ReStructuredText
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======================
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Testing Serial Console
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======================
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The main aim of this feature is exposing an interactive web-based
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serial consoles through a web-socket proxy.
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This page describes how to test it from a devstack environement.
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---------------------------------
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Setting up a devstack environemnt
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---------------------------------
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.. code-block:: bash
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# sudo apt-get install git -y || sudo yum install -y git
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# git clone https://git.openstack.org/openstack-dev/devstack
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# cd devstack && ./stack.sh
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-------------------------------------
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Starting the nova-serialproxy service
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-------------------------------------
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.. code-block:: bash
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# screen -S stack -X screen -t n-sproxy
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# screen -S stack -p n-sproxy -X stuff 'sudo nova-serialproxy\r'
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-----------------------------
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Setting up a Nova environemnt
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-----------------------------
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The entire configuration is provided in `nova.conf` through the
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category `serial_console`.
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.. code-block:: bash
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# cat >> /etc/nova/nova.conf <<EOF
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[serial_console]
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enabled = True
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EOF
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To get more information about available options see:
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- http://docs.openstack.org/trunk/config-reference/content/list-of-compute-config-options.html
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You should now restart services 'n-api' and 'n-cpu' from the 'stack'
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screen; The command `./rejoin-stack.sh` located to the root directory
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of devstack will let you to join screen. By the combination of the keys
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"Ctrl+a" you should be able to switch between services. Just kill
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them with "Ctrl+c" and restart them by using the command history
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provided by bash "Up-Arrow".
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---------------
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Testing the API
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---------------
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Starting a new instance.
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.. code-block:: bash
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# cd devstack && . openrc
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# nova boot --flavor 1 --image cirros-0.3.2-x86_64-uec cirros1
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Nova provides a command `nova get-serial-console` which will returns a
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URL with a valid token to connect to the serial console of VMs.
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.. code-block:: bash
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# nova get-serial-console cirros1
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+--------+-----------------------------------------------------------------+
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| Type | Url |
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+--------+-----------------------------------------------------------------+
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| serial | ws://127.0.0.1:6083/?token=5f7854b7-bf3a-41eb-857a-43fc33f0b1ec |
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+--------+-----------------------------------------------------------------+
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Currently nova does not provide any client able to connect from an
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interactive console through a web-socket.
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A simple client for *test purpose* can be written with few lines of Python.
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.. code-block:: python
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# sudo easy_install ws4py || sudo pip install ws4py
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# cat >> client.py <<EOF
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import sys
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from ws4py.client.threadedclient import WebSocketClient
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class LazyClient(WebSocketClient):
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def run(self):
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try:
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while not self.terminated:
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try:
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b = self.sock.recv(4096)
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sys.stdout.write(b)
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sys.stdout.flush()
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except: # socket error expected
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pass
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finally:
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self.terminate()
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if __name__ == '__main__':
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if len(sys.argv) != 2 or not sys.argv[1].startswith("ws"):
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print "Usage %s: Please use websocket url"
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print "Example: ws://127.0.0.1:6083/?token=xxx"
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exit(1)
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try:
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ws = LazyClient(sys.argv[1], protocols=['binary'])
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ws.connect()
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while True:
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# keyboard event...
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c = sys.stdin.read(1)
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if c:
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ws.send(c)
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ws.run_forever()
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except KeyboardInterrupt:
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ws.close()
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EOF
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.. code-block:: bash
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# python client.py ws://127.0.0.1:6083/?token=5f7854b7-bf3a-41eb-857a-43fc33f0b1ec
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<enter>
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cirros1 login
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