start_up_new_node

#!/bin/bash

#This wrapper script parses all relevant information and triggers the node adding procedure

rc_file_path=$1					#Get OpenStack rc file path as cmd line input


#Check if rc_file_path has been entered and a file can be found
if [ -z "$1" ]
then
    	echo "You have not specified the path to the OpenStack RC File. Please specify the file path"
	exit 1
	
elif ! [ -f "$1" ]
then
	echo "You have specified a path to the OpenStack RC File, but no file can be found under this path. Plese check and enter the correct file path"
	exit 1
else
	echo "OpenStack RC File path is specififed and path is valid"
fi

sh ./get_next_compute_node_number.sh 		#Start script to parse out next node number
next_node_number=$(cat next_node_number)        #Save next node number in variable
cd terraform_add_node/				#Change to add node directory
source $rc_file_path				#Set path to rc file to source OpenStack API credentials

terraform init					#Init terrafrom
terraform apply -auto-approve 			#Apply node start
cd ..						#Change to repository root directory

search_line_number=$(grep -n "master-instance" terraform/terraform.tfstate | cut -f1 -d:)								#Get line number, after master information starts
IP_MASTER_NODE=$(tail -n +$search_line_number terraform/terraform.tfstate | grep "access_ip_v4" | awk -F ': "' '{print $2}' | head -c -3)	#Get public IP of master node
NEW_NODE_IP=$(grep -n "fixed_ip_v4" terraform_add_node/terraform.tfstate | awk -F ': "' '{print $2}' | head -c -3)				#Get the IP of the node to be added
NEW_NODE_HOSTNAME=$(grep -n "unicore-compute-node-" terraform_add_node/terraform.tfstate | awk -F ': "' '{print $2}' | head -c -3)			#Get the hostname of the node to be added
SSH_PATH_LOCAL="/home/centos/.ssh/connection_key.pem"													#Get path to internal SSH key in master node
SSH_PATH_MASTER=$(awk '/private_key_path/{getline; print}' terraform/vars.tf | awk -F ' = "' '{print $2}' | head -c -2)					#Get path to SSH key to master node

ssh -n -o StrictHostKeyChecking=no -i $SSH_PATH_MASTER centos@$IP_MASTER_NODE "add_node_to_cluster $NEW_NODE_IP $NEW_NODE_HOSTNAME $SSH_PATH_LOCAL"	#Start new node over script on master node

terraform state mv -state=terraform_add_node/terraform.tfstate -state-out=terraform/terraform.tfstate openstack_compute_instance_v2.compute openstack_compute_instance_v2.compute[$next_node_number]

rm terraform_add_node/terraform.tfstate*														#Remove terraform state file possibly start further nodes
rm terraform/terraform.tfstate.*															#Remove terraform state file backups