Rocket.Chat in CentOS
This installation guide was tested in the following environment:
  • Rocket.Chat 3.9.0
  • OS: CentOS 7.6
  • MongoDB 4.0.9
  • NodeJS 12.18.4
As from Rocket.Chat 4.4.0, NodeJS version 14.x.x is used.

Install necessary dependency packages

Update package list and configure yum to install the official MongoDB packages with the following yum repository file:
sudo yum -y check-update
cat << EOF | sudo tee -a /etc/yum.repos.d/mongodb-org-4.0.repo
name=MongoDB Repository
Configure Node.js to be installed via package manager:
sudo yum install -y curl && curl -sL | sudo bash -
Install build tools, MongoDB, nodejs and graphicsmagick:
sudo yum install -y gcc-c++ make mongodb-org nodejs
sudo yum install -y epel-release && sudo yum install -y GraphicsMagick
Using npm install inherits and n, and the node version required by Rocket.Chat:
sudo npm install -g inherits n && sudo n 12.18.4

Install Rocket.Chat

Download the latest Rocket.Chat version:
curl -L -o /tmp/
tar -xzf /tmp/ -C /tmp
Install (this guide uses /opt but feel free to choose a different directory):
cd /tmp/bundle/programs/server && npm installs
sudo mv /tmp/bundle /opt/Rocket.Chath

Configure the Rocket.Chat service

Add the Rocket.Chat user, set the right permissions on the Rocket.Chat folder and create the Rocket.Chat service file:
sudo useradd -M rocketchat && sudo usermod -L rocketchat
sudo chown -R rocketchat:rocketchat /opt/Rocket.Chat
cat << EOF |sudo tee -a /lib/systemd/system/rocketchat.service
Description=The Rocket.Chat server nginx.service mongod.service
ExecStart=/usr/local/bin/node /opt/Rocket.Chat/main.js
Environment=MONGO_URL=mongodb://localhost:27017/rocketchat?replicaSet=rs01 MONGO_OPLOG_URL=mongodb://localhost:27017/local?replicaSet=rs01 ROOT_URL=http://localhost:3000/ PORT=3000
Open the Rocket.Chat service file just created (/usr/lib/systemd/system/rocketchat.service) using sudo and your favourite text editor, and change the ROOT_URL environmental variable to reflect the URL you want to use for accessing the server (optionally change MONGO_URL, MONGO_OPLOG_URL and PORT):
Setup storage engine and replication for MongoDB (mandatory for versions > 1), and enable and start MongoDB and Rocket.Chat:
sudo sed -i "s/^# engine:/ engine: mmapv1/" /etc/mongod.conf
sudo sed -i "s/^#replication:/replication:\n replSetName: rs01/" /etc/mongod.conf
sudo systemctl enable mongod && sudo systemctl start mongod
mongo --eval "printjson(rs.initiate())"
sudo systemctl enable rocketchat && sudo systemctl start rocketchat

Optional configurations

Configure firewall rule Configure a HTTP reverse proxy to access Rocket.Chat server [Configure mongo access control] [Configure production values for mongodb]

Configure your Rocket.Chat server

Open a web browser and access the configured ROOT_URL (, follow the configuration steps to set an admin account and your organization and server info.

ZLIB version problem

Some users had experienced problems starting Rocket.Chat server in CentOS because their zlib version is not compatible with Rocket.Chat.
If you find an error message similar to the following in the logs:
Exception in callback of async function: Error: /lib64/ version `ZLIB_1.2.9' not found
Add this environmental variable in the Rocket.Chat service file (/usr/lib/systemd/system/rocketchat.service):


502 Bad Gateway
If you are installing Rocket.Chat on CentOS or RHEL you may encounter a 502 Bad Gateway error after setting up set up a reverse proxy with Nginx. To fix this you need to enable loopback for your upstream in SELinux.
setsebool -P httpd_can_network_connect 1