ovs-helper // ovs helper command for OPNFV Apex

ovs-helper

#!/usr/bin/env bash

CONFIG=${CONFIG:-'/var/opt/opnfv'}
RESOURCES=${RESOURCES:-"$CONFIG/images"}
LIB=${LIB:-"$CONFIG/lib"}
#VALID_CMDS="undercloud overcloud opendaylight debug-stack mock-detached -h --help"
VALID_CMDS="getdpid getflow -h --help"

source $LIB/utility-functions.sh

SSH_OPTIONS=(-o StrictHostKeyChecking=no -o GlobalKnownHostsFile=/dev/null -o UserKnownHostsFile=/dev/null -o LogLevel=error)

resolve_cmd() {
  local given=$1
  shift
  local list=($*)
  local inv=(${list[*]##${given}*})
  local OIFS=$IFS; IFS='|'; local pat="${inv[*]}"; IFS=$OIFS
  shopt -s extglob
  echo "${list[*]##+($pat)}"
  shopt -u extglob
}

display_usage() {
  echo -e "Usage:\n$0 subcommand [ arguments ]\n"
  echo -e "Arguments:\n"
  echo -e "   getdpid                           Listup OpenVSwitch DPID as decimal format\n"
  echo -e "   getflow  [ node ]                 Print OVS flowtable at given node\n"
}

get_flow() {
  local node
  local node_output
  local node_ip

  if [ -z "$1" ]; then
    echo "Missing required argument: overcloud node to login to"
    return 1
  elif ! echo "$1" | grep -E "(controller|compute)[0-9]+" > /dev/null; then
    echo "Invalid argument: overcloud node to login to must be in the format: \
controller<number> or compute<number>"
    return 1
  fi

  node_output=$(undercloud_connect "stack" "source stackrc; nova list")
  node=$(echo "$1" | sed -E 's/([a-zA-Z]+)([0-9]+)/\1-\2/')

  node_ip=$(echo "$node_output" | grep "$node" | grep -Eo "[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+")

  if [ "$node_ip" == "" ]; then
    echo -e "Unable to find IP for ${node} in \n${node_output}"
    return 1
  fi

  ssh ${SSH_OPTIONS[@]} -T heat-admin@${node_ip} "sudo ovs-ofctl dump-flows br-int --protocol=OpenFlow13"
}

get_dpid() {
  node_output=$(undercloud_connect "stack" "source stackrc; openstack server list -f csv | \
	awk -F, '{print \$2\"/\"\$4;}' | sed -e '1,1d' -e 's/ctlplane=//g' -e 's/\"//g'")
  for i in $node_output; do 
    hostname=$(echo $i|awk -F/ '{print $1;}')
    ip=$(echo $i|awk -F/ '{print $2;}')
    ovs_ofctl_out=$(ssh ${SSH_OPTIONS[@]} -T heat-admin@${ip} "sudo ovs-ofctl show br-int --protocol=OpenFlow13")
    ovs_dpid=$(echo $ovs_ofctl_out | perl -nlE "say if s/.*dpid:(\S+) .*/\$1/g")
    printf "%s:%d (0x%x)\n" ${hostname} 0x${ovs_dpid} 0x${ovs_dpid}
  done
}

##translates the command line argument
##params: $@ the entire command line is passed
##usage: parse_cmd_line() "$@"
parse_cmdline() {
  local match

  match=($(resolve_cmd $1 $VALID_CMDS))
  if [ ${#match[*]} -gt 1 ]; then
    echo "$1 is ambiguous, possible matches: ${match[*]}" >&2
    exit 1
  elif [ ${#match[*]} -lt 1 ]; then
    echo "$0 is not a recognized command.  Use -h to see acceptable list" >&2
    exit 1
  else
    match=$(echo $match | tr -d ' ')
  fi

  case "$match" in
        -h|--help)
                display_usage
                exit 0
            ;;
        getdpid)
                get_dpid
                exit 0
            ;;
        getflow)
                if [ -z "$2" ]; then
                  get_flow
                else
                  get_flow "$2"
                fi
                exit 0
            ;;
        *)
                echo -e "\n\nThis script is used to interact with Apex deployments\n\n"
                echo "Use -h to display help"
                exit 1
            ;;
  esac
}


main() {
  parse_cmdline "$@"
}

main "$@"