UserData

"UserData": {
          "Fn::Base64": {
            "Fn::Join": [
              "",
              [
                "#!/bin/bash\n",
                "#\n",
                "# This script starts at the launch of a VM, and handles final cluster coordination.\n",
                "LOGFILE=/home/ubuntu/setup.log\n",
                "echo `date` 'Preparing Causal Cluster' | tee -a $LOGFILE\n",
                "\n",
                "/bin/systemctl stop neo4j.service 2>&1 | tee -a $LOGFILE\n",
                "mkdir neo4jjars\n",
                "aws s3 cp s3://prod-company-neo4j-jars/graphaware-server-community-all-3.5.2.jar neo4jjars/graphaware-server-community-all-3.5.2.jar\n",
                "aws s3 cp s3://prod-company-neo4j-jars/relationships-1.0-SNAPSHOT.jar neo4jjars/relationships-1.0-SNAPSHOT.jar\n",
                "cp neo4jjars/graphaware-server-community-all-3.5.2.jar /var/lib/neo4j/plugins/graphaware-server-community-all-3.5.2.jar\n",
                "cp neo4jjars/relationships-1.0-SNAPSHOT.jar /var/lib/neo4j/plugins/relationships-1.0-SNAPSHOT.jar\n",
                "chown neo4j:neo4j /var/lib/neo4j/plugins/graphaware-server-community-all-3.5.2.jar\n",
                "chown neo4j:neo4j /var/lib/neo4j/plugins/relationships-1.0-SNAPSHOT.jar\n",
                "echo dbms.unmanaged_extension_classes=com.graphaware.server=/graphaware >> /etc/neo4j/neo4j.template\n",
                "export API=http://169.254.169.254/latest/\n",
                "export EC2_AVAIL_ZONE=$(curl --silent $API/meta-data/placement/availability-zone)\n",
                "export EC2_INSTANCE_ID=$(curl -s $API/meta-data/instance-id)\n",
                "export EC2_REGION=$(curl -s $API/dynamic/instance-identity/document | jq -r .region)\n",
                "export ROOT_DISK_ID=$(aws ec2 describe-volumes --filters Name=attachment.instance-id,Values=${EC2_INSTANCE_ID} Name=attachment.device,Values=/dev/sda1 --query 'Volumes[*].[VolumeId]' --region=${EC2_REGION} --out text | cut -f 1)\n",
                "export DATA_DISK_ID=$(aws ec2 describe-volumes --filters Name=attachment.instance-id,Values=${EC2_INSTANCE_ID} Name=attachment.device,Values=/dev/sdb --query 'Volumes[*].[VolumeId]' --region=${EC2_REGION} --out text | cut -f 1)\n",
                "env | tee -a $LOGFILE\n",
                "# Tag volumes, which CloudFormation does not allow\n",
                "# Root volume: /dev/sda, data volume /dev/sdb\n",
                "aws ec2 create-tags --resources $ROOT_DISK_ID --tags Key=Name,Value=\"Root Neo4j Vol for $EC2_INSTANCE_ID\" --region ${EC2_REGION} 2>&1 | tee -a $LOGFILE\n",
                "aws ec2 create-tags --resources $DATA_DISK_ID --tags Key=Name,Value=\"Neo4j Data Vol for $EC2_INSTANCE_ID\" --region ${EC2_REGION} 2>&1 | tee -a $LOGFILE\n",
                "# Format EBS storage, and mount it in Neo4j directory\n",
                "echo `date` 'Preparing neo4j volume...' | tee -a $LOGFILE\n",
                "mkfs -t ext4 /dev/xvdb 2>&1 | tee -a $LOGFILE\n",
                "mkdir /tmpmount 2>&1 | tee -a $LOGFILE\n",
                "mount /dev/xvdb /tmpmount/ 2>&1 | tee -a $LOGFILE\n",
                "cp --preserve=all -r /var/lib/neo4j/* /tmpmount/ 2>&1 | tee -a $LOGFILE\n",
                "umount /tmpmount 2>&1 | tee -a $LOGFILE\n",
                "rm -rf /tmpmount 2>&1 | tee -a $LOGFILE\n",
                "echo `date` 'Remounting new volume in place...' | tee -a $LOGFILE\n",
                "mount /dev/xvdb /var/lib/neo4j 2>&1 | tee -a $LOGFILE\n",
                "FSTAB_ENTRY='/dev/xvdb /var/lib/neo4j ext4 defaults,discard 0 2'\n",
                "echo $FSTAB_ENTRY >> /etc/fstab\n",
                "mount -a 2>&1 | tee -a $LOGFILE\n",
                "echo `date` 'Preparing neo4j service...' | tee -a $LOGFILE\n",
                "/bin/rm -rf /var/lib/neo4j/data/databases/graph.db/ 2>&1 | tee -a $LOGFILE\n",
                "/bin/systemctl start neo4j.service 2>&1 | tee -a $LOGFILE\n",
                "\n",
                "sudo apt-get update\n",
                "mkdir aws-cfn-bootstrap-latest\n",
                "curl https://s3.amazonaws.com/cloudformation-examples/aws-cfn-bootstrap-latest.tar.gz | tar xz -C aws-cfn-bootstrap-latest --strip-components 1\n",
                "easy_install aws-cfn-bootstrap-latest\n",
                "\n",
                "echo Stack ID '",
                {
                  "Ref": "AWS::StackId"
                },
                "' | tee -a $LOGFILE\n",
                "export STACK_TOKEN=$(echo '",
                {
                  "Ref": "AWS::StackId"
                },
                "' | base64 | tail -c 12)\n",
                "# Loop waiting for neo4j service to start.\n",
                "while true; do\n",
                "    if curl -s -I http://localhost:7474 | grep '200 OK'; then\n",
                "        echo `date` 'Neo4j is up; changing default password' 2>&1 | tee -a $LOGFILE\n",
                "\n",
                "        curl -v -H 'Content-Type: application/json' \\n",
                "                -XPOST -d '{\"password\":\"",
                {
                  "Ref": "Password"
                },
                "\"}' \\\n",
                "                -u neo4j:neo4j \\\n",
                "                http://localhost:7474/user/neo4j/password \\\n",
                "                2>&1 | tee -a $LOGFILE\n",
                "        echo `date` 'Password reset; a graph user is you!' 2>&1 | tee -a $LOGFILE\n",
                "\n",
                "        echo `date` 'Startup complete ' | tee -a $LOGFILE\n",
                "        break\n",
                "    fi\n",
                "\n",
                "    echo `date` 'Waiting for neo4j to come up' 2>&1 | tee -a $LOGFILE\n",
                "    sleep 1\n",
                "done\n",
                "\n",
                "echo Signaling stack success | tee -a $LOGFILE\n",
                "/usr/local/bin/cfn-signal --stack ",
                {
                  "Ref": "AWS::StackName"
                },
                " \\\n",
                "       --id $EC2_INSTANCE_ID \\\n",
                "       --region ",
                {
                  "Ref": "AWS::Region"
                },
                " \\\n",
                "       --success true -d \"$STACK_TOKEN\" '",
                {
                  "Ref": "StackTokenWaitHandle"
                },
                "' 2>&1 | tee -a $LOGFILE \n"
              ]
            ]
          }
        }