# Linux packages
dnf -y wget install net-snmp-agent-libs

groupadd mongod 
useradd mongod -g mongod -G mongod
mkdir -p /app/mongodb
chown -R mongod:mongod /app/mongodb

# disable selinux
# in /etc/selinux/config -->
SELINUX=disabled
# <-------------------------

# Disable Transparent Huge Pages (THP) following https://docs.mongodb.com/manual/tutorial/transparent-huge-pages/

su - mongod
cd /app/mongodb
mkdir product conf data log
cd product
wget https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-rhel80-4.2.3.tgz
gunzip -c mongodb-linux-x86_64-rhel80-4.2.3.tgz | tar -xvf -
rm -rf mongodb-linux-x86_64-rhel80-4.2.3.tgz
ln -s mongodb-linux-x86_64-rhel80-4.2.3 current_version

# create configuration file 
# /app/mongodb/conf/mongod.conf -->
storage:
  dbPath: "/app/mongodb/data"
  journal:
    enabled: true

net:
  port: 27017
  bindIp: 127.0.0.1,192.168.0.127
# <-------------------------------

# Test MongoDB server startup (press Ctrl-C to stop)
/app/mongodb/product/current_version/bin/mongod --config=/app/mongodb/conf/mongod.conf --logpath=/app/mongodb/log/mongod.log

# Add to systemd as service
# create /etc/systemd/system/mongod.service -->
[Unit]
Description=MongoDB
After=multi-user.target

[Service]
Type=simple
# (file size)
LimitFSIZE=infinity
# (cpu time)
LimitCPU=infinity
# (virtual memory size)
LimitAS=infinity
# (locked-in-memory size)
LimitMEMLOCK=infinity
# (open files)
LimitNOFILE=64000
# (processes/threads)
LimitNPROC=64000

User=mongod
Group=mongod

ExecStart=/app/mongodb/product/current_version/bin/mongod --config /app/mongodb/conf/mongod.conf --logpath=/app/mongodb/log/mongod.log

[Install]
WantedBy=multi-user.target
# <--------------------------------------------

systemctl daemon-reload
systemctl status mongod
systemctl start mongod
systemctl status mongod
systemctl stop mongod
systemctl status mongod
systemctl start mongod
systemctl enable mongod

# check listening port
lsof -i -P | grep -i "listen"

# Test mongo shell
/app/mongodb/product/current_version/bin/mongo --host ajara

# In order to avoid the message [Browserslist: caniuse-lite is outdated. Please run: npx browserslist@latest --update-db] when running MongoShell:
export BROWSERSLIST_IGNORE_OLD_DATA=1