#!/usr/bin/env bash

 
 # **unstack.sh**
 

 # Stops that which is started by ``stack.sh`` (mostly)
 # mysql and rabbit are left running as OpenStack code refreshes
 # do not require them to be restarted.
 #

 # Stop all processes by setting ``UNSTACK_ALL`` or specifying ``--all``

 # on the command line
 
 # Keep track of the current devstack directory.
 TOP_DIR=$(cd $(dirname "$0") && pwd)
 
 # Import common functions
 source $TOP_DIR/functions
 
 # Load local configuration
 source $TOP_DIR/stackrc
 

 # Destination path for service data
 DATA_DIR=${DATA_DIR:-${DEST}/data}
 
 # Get project function libraries
 source $TOP_DIR/lib/cinder
 source $TOP_DIR/lib/n-vol
 

 # Determine what system we are running on.  This provides ``os_VENDOR``,
 # ``os_RELEASE``, ``os_UPDATE``, ``os_PACKAGE``, ``os_CODENAME``
 GetOSVersion
 
 if [[ "$1" == "--all" ]]; then
     UNSTACK_ALL=${UNSTACK_ALL:-1}
 fi
 
 # Shut down devstack's screen to get the bulk of OpenStack services in one shot

 SCREEN=$(which screen)
 if [[ -n "$SCREEN" ]]; then
     SESSION=$(screen -ls | awk '/[0-9].stack/ { print $1 }')
     if [[ -n "$SESSION" ]]; then
         screen -X -S $SESSION quit
     fi

 fi
 
 # Swift runs daemons
 if is_service_enabled swift; then

     swift-init all stop 2>/dev/null || true

 fi
 
 # Apache has the WSGI processes
 if is_service_enabled horizon; then
     stop_service apache2
 fi
 

 SCSI_PERSIST_DIR=$CINDER_STATE_PATH/volumes/*
 

 # Get the iSCSI volumes

 if is_service_enabled cinder n-vol; then

     if is_service_enabled n-vol; then
         SCSI_PERSIST_DIR=$NOVA_STATE_PATH/volumes/*
     fi
 

     TARGETS=$(sudo tgtadm --op show --mode target)

     if [ $? -ne 0 ]; then
         # If tgt driver isn't running this won't work obviously
         # So check the response and restart if need be
         echo "tgtd seems to be in a bad state, restarting..."
         if [[ "$os_PACKAGE" = "deb" ]]; then
             restart_service tgt
         else
             restart_service tgtd
         fi
         TARGETS=$(sudo tgtadm --op show --mode target)
     fi
 

     if [[ -n "$TARGETS" ]]; then

         iqn_list=( $(grep --no-filename -r iqn $SCSI_PERSIST_DIR | sed 's/<target //' | sed 's/>//') )
         for i in "${iqn_list[@]}"; do
             echo removing iSCSI target: $i
             sudo tgt-admin --delete $i
         done
     fi
 
     if is_service_enabled cinder; then
         sudo rm -rf $CINDER_STATE_PATH/volumes/*
     fi
 
     if is_service_enabled n-vol; then
         sudo rm -rf $NOVA_STATE_PATH/volumes/*

     fi

 
     if [[ "$os_PACKAGE" = "deb" ]]; then
         stop_service tgt
     else
         stop_service tgtd
     fi

 fi
 
 if [[ -n "$UNSTACK_ALL" ]]; then
     # Stop MySQL server
     if is_service_enabled mysql; then
         stop_service mysql
     fi

 
     # Stop rabbitmq-server
     if is_service_enabled rabbit; then
         stop_service rabbitmq-server
     fi

 fi

 
 # Quantum dhcp agent runs dnsmasq
 if is_service_enabled q-dhcp; then
     sudo kill -9 $(ps aux | awk '/[d]nsmasq.+interface=tap/ { print $2 }')
 fi