// set hostname
sudo hostnamectl set-hostname host01.example.com
sudo hostnamectl set-hostname host02.example.com
sudo hostnamectl set-hostname host03.example.com

// register a DNS A record hostname with private IP to Route 53
PRIVATEIPS="IP01 IP02 IP03"
HOSTNUM=1
for IP in $PRIVATEIPS
do
 export FQDN="host0$HOSTNUM.example.com"
 echo "Registering $host as $FQDN"
cat <<EOF> newhost0$HOSTNUM.json
{
  "Comment": "CREATE an A record ",
  "Changes": [{
    "Action": "UPSERT",
    "ResourceRecordSet": {
      "Name": "$FQDN",
      "Type": "A",
      "TTL": 300,
      "ResourceRecords": [{ "Value":"$IP"}]
    }
  }]
}
EOF
aws route53 change-resource-record-sets --hosted-zone-id XXXOOOZZZJJ --change-batch file://newhost0$HOSTNUM.json
let "HOSTNUM=HOSTNUM+1"
done

// check in 3 hosts, to make sure the DNS is work as expect, the referenced A record IP will list hints the DNS work as expected.
for i in 1 2 3 ; do dig host0$i.example.com +short ; done

sudo mkfs -t xfs /dev/nvme1n1
sudo mkdir /data
sudo mount /dev/nvme1n1 /data
grep -q /dev/nvme1n1 /etc/fstab || echo "/dev/nvme1n1       /data          xfs     defaults,noatime   1  1" | sudo tee --append /etc/fstab
sudo findmnt --verify

grep -q 'vm.zone_reclaim_mode' /etc/sysctl.conf || echo "vm.zone_reclaim_mode=0
" | sudo tee --append /etc/sysctl.conf
sudo sysctl -w  vm.zone_reclaim_mode=0

grep -q 'vm.swappiness' /etc/sysctl.conf || echo "vm.swappiness=1" | sudo tee --append /etc/sysctl.conf
sudo sysctl -w  vm.swappiness=1

for limit in fsize cpu as memlock
do
  grep "mongodb" /etc/security/limits.conf | grep -q $limit || echo -e "mongod     hard   $limit    unlimited\nmongod     soft    $limit   unlimited" | sudo tee --append /etc/security/limits.conf
done

for limit in nofile noproc
do
  grep "mongodb" /etc/security/limits.conf | grep -q $limit || echo -e "mongod     hard   $limit    64000\nmongod     soft    $limit   64000" | sudo tee --append /etc/security/limits.conf
done

sudo reboot

cat << 'ENDOFDOC' | sudo tee /etc/yum.repos.d/mongodb-enterprise.repo
[mongodb-enterprise]
name=MongoDB Enterprise Repository
baseurl=https://repo.mongodb.com/yum/amazon/2/mongodb-enterprise/4.0/$basearch/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-4.0.asc
ENDOFDOC

sudo yum install -y mongodb-enterprise

sudo mkdir /data/appdb
sudo chown mongod:mongod /data/appdb

cat << 'ENDCONF' | sudo tee /etc/mongod.conf
# mongod.conf

# for documentation of all options, see:
#   http://docs.mongodb.org/manual/reference/configuration-options/

# where to write logging data.
systemLog:
  destination: file
  logAppend: true
  path: /data/appdb/mongod.log

# Where and how to store data.
storage:
  dbPath: /data/appdb
  journal:
    enabled: true
  wiredTiger:
    engineConfig:
       cacheSizeGB: 2


# how the process runs
processManagement:
  fork: true  # fork and run in background
  pidFilePath: /var/run/mongodb/mongod.pid  # location of pidfile
  timeZoneInfo: /usr/share/zoneinfo

# network interfaces
net:
  port: 27017
  bindIpAll: true

replication:
  replSetName: appdbRS
ENDCONF

sudo systemctl start mongod
sudo systemctl enable mongod

mongo -eval 'rs.initiate()'
mongo -eval 'rs.add("host02.mongosa.net:27017")'
mongo -eval 'rs.add("host03.mongosa.net:27017")'

$ curl -OL https://downloads.mongodb.com/on-prem-mms/rpm/mongodb-mms-4.0.16.50586.20191101T1422Z-1.x86_64.rpm
$ ls
mongodb-mms-4.0.16.50586.20191101T1422Z-1.x86_64.rpm

$ sudo yum localinstall mongodb-mms-4.0.16.50586.20191101T1422Z-1.x86_64.rpm -y

mongo.mongoUri=mongodb://host01.example.com:27017,host02.example.com:27017,host03.example.com:27017/?maxPoolSize=150&replicaSet=appdbRS

$ sudo service mongodb-mms start

$ sudo netstat -antulop | grep 8080
tcp        0      0 0.0.0.0:8080            0.0.0.0:*               LISTEN      3258/mms-app         off (0.00/0/0)

host01.example.com:27018,host02.example.com:27018,host03.example.com:27018

sudo mkdir /data/heads
sudo chown mongodb-mms:mongodb-mms /data/heads

host01.example.com:27018,host02.example.com:27018,host03.example.com:27018

db.createUser({user: "mms-monitoring-agent", pwd: "mongo", roles: [{ role:"clusterMonitor", db: "admin" }]})

Hostname              -  192.168.33.101
Port                  -  27017
Enable Authentication -  Yes
Username              -  mms-monitoring-agent
Password              -  mongo

use admin
db.createUser({user: 'mms-automation', pwd: 'mongo', roles: ['clusterAdmin', 'dbAdminAnyDatabase', 'readWriteAnyDatabase', 'restore', 'userAdminAnyDatabase']})