Add devstack plugin

Add devstack plugin and update the usage information in the README.

Change-Id: Idc5384ae4ca0a911853741923ec967cba1b6c145

README.rst

@@ -5,8 +5,8 @@ Virtual Serial Port Concentrator for use in the vSphere environment. It collects
 serial console logs from VMs which have configured virtual serial port pointing
 to it.
 
-Usage
-=====
+Usage with OpenStack
+--------------------
 
 Copy ``vspc.conf.sample`` as ``vspc.conf`` and edit as appropriate::
 
@@ -21,4 +21,21 @@ Copy ``vspc.conf.sample`` as ``vspc.conf`` and edit as appropriate::
 
 Then start with::
 
-    $ vmware-vspc --config-file vspc.conf
+    $ vmware-vspc --config-file vspc.conf
+
+In ``nova.conf`` add the following properties::
+
+    [vmware]
+    serial_port_service_uri = vmware-vspc
+    serial_port_proxy_uri = telnets://<vspc_host>:13370#thumbprint=<vspc_thumbprint>
+
+where ``vspc_host`` is the host where VSPC runs and ``vspc_thumbprint`` is the SHA1
+thumbprint of the configured certificate.
+
+Usage with Devstack
+-------------------
+
+There is a devstack plugin, so simply add this to your ``local.conf``::
+
+    [[local|localrc]]
+    enable_plugin vmware-vspc https://github.com/openstack/vmware-vspc

devstack/plugin.sh

@@ -0,0 +1,80 @@
+# Save trace setting
+XTRACE=$(set +o | grep xtrace)
+set -o xtrace
+
+NOVA_CONF=/etc/nova/nova.conf
+VSPC_CONF_DIR=/etc/vmware
+VSPC_CONF=$VSPC_CONF_DIR/vspc.conf
+VSPC_PORT=${VSPC_PORT:-13370}
+VSPC_URI=vspc-uri
+VSPC_LOG_DIR=$DATA_DIR/vspc
+
+function install_vspc {
+    # save the old values of PYTHON3_VERSION and USE_PYTHON3
+    # since we are going to change them
+    PYTHON3_VERSION_OLD=$PYTHON3_VERSION
+    USE_PYTHON3_OLD=$USE_PYTHON3
+    PYTHON3_VERSION=${PYTHON3_VERSION:-3.5}
+    USE_PYTHON3=True
+    install_python3
+    USE_PYTHON3=True PYTHON3_VERSION=$PYTHON3_VERSION $TOP_DIR/tools/install_pip.sh
+    echo_summary "Installing vmware-vspc"
+    setup_package $DEST/vmware-vspc -e
+    USE_PYTHON3=$USE_PYTHON3_OLD
+    PYTHON3_VERSION=$PYTHON3_VERSION_OLD
+}
+
+function configure_vspc {
+    echo_summary "Generating VSPC certificate and key"
+    sudo install -d -o $STACK_USER $VSPC_CONF_DIR
+    openssl req -x509 -sha256 -nodes -days 365 -newkey rsa:2048 \
+        -subj '/CN=devstack' -keyout $VSPC_CONF_DIR/key.pem \
+        -out $VSPC_CONF_DIR/cert.pem
+    THUMBPRINT=$(openssl x509 -in $VSPC_CONF_DIR/cert.pem -sha1 -noout -fingerprint | awk -F'=' '{print $2}')
+
+    echo_summary "Creating VSPC config file"
+    rm -f $VSPC_CONF
+    iniset $VSPC_CONF DEFAULT debug "$ENABLE_DEBUG_LOG_LEVEL"
+    iniset $VSPC_CONF DEFAULT host "$SERVICE_HOST"
+    iniset $VSPC_CONF DEFAULT port "$VSPC_PORT"
+    iniset $VSPC_CONF DEFAULT cert "$VSPC_CONF_DIR/cert.pem"
+    iniset $VSPC_CONF DEFAULT key "$VSPC_CONF_DIR/key.pem"
+    iniset $VSPC_CONF DEFAULT uri "$VSPC_URI"
+    sudo install -d -o $STACK_USER $VSPC_LOG_DIR
+    iniset $VSPC_CONF DEFAULT serial_log_dir "$VSPC_LOG_DIR"
+
+    echo_summary "Configuring VSPC settings in nova.conf"
+    PROXY_URI="telnets://$SERVICE_HOST:$VSPC_PORT#thumbprint=$THUMBPRINT"
+    iniset $NOVA_CONF vmware serial_port_service_uri "$VSPC_URI"
+    iniset $NOVA_CONF vmware serial_port_proxy_uri "$PROXY_URI"
+}
+
+function start_vspc {
+    echo_summary "Starting vmware-vspc ..."
+    BIN_DIR=$(get_python_exec_prefix)
+    run_process vmware-vspc "$BIN_DIR/vmware-vspc --config-file $VSPC_CONF"
+}
+
+# check for service enabled
+if is_service_enabled vmware-vspc; then
+
+    if [[ "$1" == "stack" && "$2" == "install" ]]; then
+        # Perform installation of service source
+        install_vspc
+
+    elif [[ "$1" == "stack" && "$2" == "post-config" ]]; then
+        # Configure after the other layer 1 and 2 services have been configured
+        configure_vspc
+
+    elif [[ "$1" == "stack" && "$2" == "extra" ]]; then
+        # Initialize and start vmware-vspc
+        start_vspc
+    fi
+
+    if [[ "$1" == "unstack" ]]; then
+        stop_process vmware-vspc
+    fi
+fi
+
+# Restore xtrace
+$XTRACE

devstack/settings

@@ -0,0 +1 @@
+enable_service vmware-vspc