Remove the Cisco Nexus monolithic plugin support

The Cisco Nexus monolithic plugin does not work without the Open
vSwitch plugin. The Open vSwitch plugin is scheduled to be removed
as per #1323729. This patch removes the Nexus Hardware switch
related code from devstack. The N1KV virtual switch related code
will still remain in the tree as it doesn't depend on Open vSwitch
plugin.

Closes-Bug: #1350387
Change-Id: I82ebb09c64589fc9b7bb790982541bc87c66e6e3

Author: Pritesh Kothari

lib/neutron_plugins/cisco

@@ -20,38 +20,12 @@ Q_CISCO_PLUGIN_VXLAN_ID_RANGES=${Q_CISCO_PLUGIN_VXLAN_ID_RANGES:-5000:10000}
 # Specify the VLAN range
 Q_CISCO_PLUGIN_VLAN_RANGES=${Q_CISCO_PLUGIN_VLAN_RANGES:-vlan:1:4094}
 
-# Specify ncclient package information
-NCCLIENT_DIR=$DEST/ncclient
-NCCLIENT_VERSION=${NCCLIENT_VERSION:-0.3.1}
-NCCLIENT_REPO=${NCCLIENT_REPO:-git://github.com/CiscoSystems/ncclient.git}
-NCCLIENT_BRANCH=${NCCLIENT_BRANCH:-master}
-
 # This routine put a prefix on an existing function name
 function _prefix_function {
     declare -F $1 > /dev/null || die "$1 doesn't exist"
     eval "$(echo "${2}_${1}()"; declare -f ${1} | tail -n +2)"
 }
 
-function _has_ovs_subplugin {
-    local subplugin
-    for subplugin in ${Q_CISCO_PLUGIN_SUBPLUGINS[@]}; do
-        if [[ "$subplugin" == "openvswitch" ]]; then
-            return 0
-        fi
-    done
-    return 1
-}
-
-function _has_nexus_subplugin {
-    local subplugin
-    for subplugin in ${Q_CISCO_PLUGIN_SUBPLUGINS[@]}; do
-        if [[ "$subplugin" == "nexus" ]]; then
-            return 0
-        fi
-    done
-    return 1
-}
-
 function _has_n1kv_subplugin {
     local subplugin
     for subplugin in ${Q_CISCO_PLUGIN_SUBPLUGINS[@]}; do
@@ -62,27 +36,6 @@ function _has_n1kv_subplugin {
     return 1
 }
 
-# This routine populates the cisco config file with the information for
-# a particular nexus switch
-function _config_switch {
-    local cisco_cfg_file=$1
-    local switch_ip=$2
-    local username=$3
-    local password=$4
-    local ssh_port=$5
-    shift 5
-
-    local section="NEXUS_SWITCH:$switch_ip"
-    iniset $cisco_cfg_file $section username $username
-    iniset $cisco_cfg_file $section password $password
-    iniset $cisco_cfg_file $section ssh_port $ssh_port
-
-    while [[ ${#@} != 0 ]]; do
-        iniset  $cisco_cfg_file $section $1 $2
-        shift 2
-    done
-}
-
 # Prefix openvswitch plugin routines with "ovs" in order to differentiate from
 # cisco plugin routines. This means, ovs plugin routines will coexist with cisco
 # plugin routines in this script.
@@ -98,73 +51,17 @@ _prefix_function neutron_plugin_configure_service ovs
 _prefix_function neutron_plugin_setup_interface_driver ovs
 _prefix_function has_neutron_plugin_security_group ovs
 
-# Check the version of the installed ncclient package
-function check_ncclient_version {
-python << EOF
-version = '$NCCLIENT_VERSION'
-import sys
-try:
-    import pkg_resources
-    import ncclient
-    module_version = pkg_resources.get_distribution('ncclient').version
-    if version != module_version:
-        sys.exit(1)
-except:
-    sys.exit(1)
-EOF
-}
-
-# Install the ncclient package
-function install_ncclient {
-    git_clone $NCCLIENT_REPO $NCCLIENT_DIR $NCCLIENT_BRANCH
-    (cd $NCCLIENT_DIR; sudo python setup.py install)
-}
-
-# Check if the required version of ncclient has been installed
-function is_ncclient_installed {
-    # Check if the Cisco ncclient repository exists
-    if [[ -d $NCCLIENT_DIR ]]; then
-        remotes=$(cd $NCCLIENT_DIR; git remote -v | grep fetch | awk '{ print $2}')
-        for remote in $remotes; do
-            if [[ $remote == $NCCLIENT_REPO ]]; then
-                break;
-            fi
-        done
-        if [[ $remote != $NCCLIENT_REPO ]]; then
-            return 1
-        fi
-    else
-        return 1
-    fi
-
-    # Check if the ncclient is installed with the right version
-    if ! check_ncclient_version; then
-        return 1
-    fi
-    return 0
-}
-
 function has_neutron_plugin_security_group {
-    if _has_ovs_subplugin; then
-        ovs_has_neutron_plugin_security_group
-    else
-        return 1
-    fi
+    return 1
 }
 
 function is_neutron_ovs_base_plugin {
-    # Cisco uses OVS if openvswitch subplugin is deployed
-    _has_ovs_subplugin
     return
 }
 
 # populate required nova configuration parameters
 function neutron_plugin_create_nova_conf {
-    if _has_ovs_subplugin; then
-        ovs_neutron_plugin_create_nova_conf
-    else
-        _neutron_ovs_base_configure_nova_vif_driver
-    fi
+    _neutron_ovs_base_configure_nova_vif_driver
 }
 
 function neutron_plugin_install_agent_packages {
@@ -177,86 +74,21 @@ function neutron_plugin_configure_common {
     # setup default subplugins
     if [ ! -v Q_CISCO_PLUGIN_SUBPLUGINS ]; then
         declare -ga Q_CISCO_PLUGIN_SUBPLUGINS
-        Q_CISCO_PLUGIN_SUBPLUGINS=(openvswitch nexus)
-    fi
-    if _has_ovs_subplugin; then
-        ovs_neutron_plugin_configure_common
-        Q_PLUGIN_EXTRA_CONF_PATH=etc/neutron/plugins/cisco
-        Q_PLUGIN_EXTRA_CONF_FILES=(cisco_plugins.ini)
-        # Copy extra config files to /etc so that they can be modified
-        # later according to Cisco-specific localrc settings.
-        mkdir -p /$Q_PLUGIN_EXTRA_CONF_PATH
-        local f
-        local extra_conf_file
-        for (( f=0; $f < ${#Q_PLUGIN_EXTRA_CONF_FILES[@]}; f+=1 )); do
-            extra_conf_file=$Q_PLUGIN_EXTRA_CONF_PATH/${Q_PLUGIN_EXTRA_CONF_FILES[$f]}
-            cp $NEUTRON_DIR/$extra_conf_file /$extra_conf_file
-        done
-    else
-        Q_PLUGIN_CONF_PATH=etc/neutron/plugins/cisco
-        Q_PLUGIN_CONF_FILENAME=cisco_plugins.ini
+        Q_CISCO_PLUGIN_SUBPLUGINS=(n1kv)
     fi
+    Q_PLUGIN_CONF_PATH=etc/neutron/plugins/cisco
+    Q_PLUGIN_CONF_FILENAME=cisco_plugins.ini
     Q_PLUGIN_CLASS="neutron.plugins.cisco.network_plugin.PluginV2"
 }
 
 function neutron_plugin_configure_debug_command {
-    if _has_ovs_subplugin; then
-        ovs_neutron_plugin_configure_debug_command
-    fi
 }
 
 function neutron_plugin_configure_dhcp_agent {
     iniset $Q_DHCP_CONF_FILE DEFAULT dhcp_agent_manager neutron.agent.dhcp_agent.DhcpAgentWithStateReport
 }
 
 function neutron_plugin_configure_l3_agent {
-    if _has_ovs_subplugin; then
-        ovs_neutron_plugin_configure_l3_agent
-    fi
-}
-
-function _configure_nexus_subplugin {
-    local cisco_cfg_file=$1
-
-    # Install a known compatible ncclient from the Cisco repository if necessary
-    if ! is_ncclient_installed; then
-        # Preserve the two global variables
-        local offline=$OFFLINE
-        local reclone=$RECLONE
-        # Change their values to allow installation
-        OFFLINE=False
-        RECLONE=yes
-        install_ncclient
-        # Restore their values
-        OFFLINE=$offline
-        RECLONE=$reclone
-    fi
-
-    # Setup default nexus switch information
-    if [ ! -v Q_CISCO_PLUGIN_SWITCH_INFO ]; then
-        declare -A Q_CISCO_PLUGIN_SWITCH_INFO
-        HOST_NAME=$(hostname)
-        Q_CISCO_PLUGIN_SWITCH_INFO=([1.1.1.1]=stack:stack:22:${HOST_NAME}:1/10)
-    else
-        iniset $cisco_cfg_file CISCO nexus_driver neutron.plugins.cisco.nexus.cisco_nexus_network_driver_v2.CiscoNEXUSDriver
-    fi
-
-    # Setup the switch configurations
-    local nswitch
-    local sw_info
-    local segment
-    local sw_info_array
-    declare -i count=0
-    for nswitch in ${!Q_CISCO_PLUGIN_SWITCH_INFO[@]}; do
-        sw_info=${Q_CISCO_PLUGIN_SWITCH_INFO[$nswitch]}
-        sw_info_array=${sw_info//:/ }
-        sw_info_array=( $sw_info_array )
-        count=${#sw_info_array[@]}
-        if [[ $count < 5 || $(( ($count-3) % 2 )) != 0 ]]; then
-            die $LINENO "Incorrect switch configuration: ${Q_CISCO_PLUGIN_SWITCH_INFO[$nswitch]}"
-        fi
-        _config_switch $cisco_cfg_file $nswitch ${sw_info_array[@]}
-    done
 }
 
 # Configure n1kv plugin
@@ -279,48 +111,29 @@ function _configure_n1kv_subplugin {
 }
 
 function neutron_plugin_configure_plugin_agent {
-    if _has_ovs_subplugin; then
-        ovs_neutron_plugin_configure_plugin_agent
-    fi
 }
 
 function neutron_plugin_configure_service {
     local subplugin
     local cisco_cfg_file
 
-    if _has_ovs_subplugin; then
-        ovs_neutron_plugin_configure_service
-        cisco_cfg_file=/${Q_PLUGIN_EXTRA_CONF_FILES[0]}
-    else
-        cisco_cfg_file=/$Q_PLUGIN_CONF_FILE
-    fi
+    cisco_cfg_file=/$Q_PLUGIN_CONF_FILE
 
     # Setup the [CISCO_PLUGINS] section
     if [[ ${#Q_CISCO_PLUGIN_SUBPLUGINS[@]} > 2 ]]; then
         die $LINENO "At most two subplugins are supported."
     fi
 
-    if _has_ovs_subplugin && _has_n1kv_subplugin; then
-        die $LINENO "OVS subplugin and n1kv subplugin cannot coexist"
-    fi
-
     # Setup the subplugins
-    inicomment $cisco_cfg_file CISCO_PLUGINS nexus_plugin
     inicomment $cisco_cfg_file CISCO_PLUGINS vswitch_plugin
     inicomment $cisco_cfg_file CISCO_TEST host
     for subplugin in ${Q_CISCO_PLUGIN_SUBPLUGINS[@]}; do
         case $subplugin in
-            nexus) iniset $cisco_cfg_file CISCO_PLUGINS nexus_plugin neutron.plugins.cisco.nexus.cisco_nexus_plugin_v2.NexusPlugin;;
-            openvswitch) iniset $cisco_cfg_file CISCO_PLUGINS vswitch_plugin neutron.plugins.openvswitch.ovs_neutron_plugin.OVSNeutronPluginV2;;
             n1kv) iniset $cisco_cfg_file CISCO_PLUGINS vswitch_plugin neutron.plugins.cisco.n1kv.n1kv_neutron_plugin.N1kvNeutronPluginV2;;
             *) die $LINENO "Unsupported cisco subplugin: $subplugin";;
         esac
     done
 
-    if _has_nexus_subplugin; then
-        _configure_nexus_subplugin $cisco_cfg_file
-    fi
-
     if _has_n1kv_subplugin; then
         _configure_n1kv_subplugin $cisco_cfg_file
     fi