Read cidrs from provided urls and add them to a nova openstack's security group

Openstack-SecurityRules-from-CIDR-list.sh

SECURITY_GROUP='xxxxxx' #EDIT ME
REGION='xxxxxx' #EDIT ME
RC_FILE='xxxxxx' #EDIT ME
CIDR_LISTS=("https://gist.githubusercontent.com/riccardobl/28a616180d8d7ad44473/raw/telecom-italia-ips.txt")
DELETE_OLD_RULES=true
DELAY_BETWEEN_REQUESTS=2

source "$RC_FILE"
export OS_REGION_NAME="$REGION"

if [ "$DELETE_OLD_RULES" = true ]; then
    # Remove all old rules
    while read -r line
    do
        sleep $DELAY_BETWEEN_REQUESTS
        parts=($(echo $line | sed -e 's/[|]/ /g'))
        echo  "Delete" $SECURITY_GROUP ${parts[0]} ${parts[1]} ${parts[2]} ${parts[3]} ${parts[4]} ${parts[5]}
        nova secgroup-delete-rule $SECURITY_GROUP ${parts[0]} ${parts[1]} ${parts[2]} ${parts[3]} ${parts[4]} ${parts[5]} > /dev/null 2> /dev/null
    done < <(nova secgroup-list-rules $SECURITY_GROUP)
fi

for a in "${CIDR_LISTS[@]}"
do
    sleep $DELAY_BETWEEN_REQUESTS
    content=$(curl  "$a" )
    while read -r line
    do
        parts=($(echo $line))
        iprange=${parts[0]}
        
        # ---- Generate new Rules ----
        nova secgroup-add-rule $SECURITY_GROUP tcp 22 22 $iprange
        # .... EDIT ME
        # ......
        # ........
        # ----------------------------
        
    done < <(echo "$content")
done