不要先安装mongodb，什么都不要做，一个纯净的linux空间，

按照下面步骤安装，很快就安装成功，一步步来，会给你节省很多时间。

Rocket.Chat in CentOS

This installation guide was tested in the following environment:

• Rocket.Chat 3.0.0

• OS: CentOS 7.6

• Mongodb 4.0.9

• NodeJS 12.14.0

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[mongodb-org-4.0]name=MongoDB Repositorybaseurl=https://repo.mongodb.org/yum/redhat/7/mongodb-org/4.0/x86_64/gpgcheck=1enabled=1gpgkey=https://www.mongodb.org/static/pgp/server-4.0.ascEOF

Configure Node.js to be installed via package manager:

sudo yum install -y curl && curl -sL https://rpm.nodesource.com/setup_12.x | 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 12.14.0

Install Rocket.Chat

Download the latest Rocket.Chat version:

curl -L https://releases.rocket.chat/latest/download -o /tmp/rocket.chat.tgz

tar -xzf /tmp/rocket.chat.tgz -C /tmp

Install (this guide uses /opt but feel free to choose a different directory):

cd /tmp/bundle/programs/server && npm install

sudo mv /tmp/bundle /opt/Rocket.Chat

Configure the Rocket.Chat service

Add the rocketchat 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[Unit]Description=The Rocket.Chat serverAfter=network.target remote-fs.target nss-lookup.target nginx.target mongod.target[Service]ExecStart=/usr/local/bin/node /opt/Rocket.Chat/main.jsStandardOutput=syslogStandardError=syslogSyslogIdentifier=rocketchatUser=rocketchatEnvironment=MONGO_URL=mongodb://localhost:27017/rocketchat?replicaSet=rs01 MONGO_OPLOG_URL=mongodb://localhost:27017/local?replicaSet=rs01 ROOT_URL=http://localhost:3000/ PORT=3000[Install]WantedBy=multi-user.targetEOF

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):

MONGO_URL=mongodb://localhost:27017/rocketchat?replicaSet=rs01MONGO_OPLOG_URL=mongodb://localhost:27017/local?replicaSet=rs01ROOT_URL=http://your-host-name.com-as-accessed-from-internet:3000PORT=3000

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 (http://your-host-name.com-as-accessed-from-internet:3000), follow the configuration steps to set an admin account and your organization and server info.

ZLIB version problem

Some users had experienced problems starting rocketchat 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/libz.so.1: version `ZLIB_1.2.9' not found

Add this environmental variable in the Rocket.Chat service file (/usr/lib/systemd/system/rocketchat.service):

Environment=LD_PRELOAD=/opt/Rocket.Chat/programs/server/npm/node_modules/sharp/vendor/lib/libz.so