mattermost/doc/install/Production-RHEL7.md

Production Installation on Red Hat Enterprise Linux 7.1+

Install Red Hat Enterprise Linux (x64) 7.1+

1. Set up 3 machines with RHEL with 2GB of RAM or more. The servers will be used for the Load Balancer, Mattermost (this must be x64 to use pre-built binaries), and Database.
   • Optional: You can also use a single machine for all 3 components in this install guide, depending on the standards of your data center.
2. Make sure the system is up to date with the most recent security patches.

• sudo yum update
• sudo yum upgrade

Set up Database Server

1. For the purposes of this guide we will assume this server has an IP address of 10.10.10.1

• Optional: if installing on the same machine substitute 10.10.10.1 with 127.0.0.1

1. Install PostgreSQL 9.4+ (or MySQL 5.6+)

• sudo yum install http://yum.postgresql.org/9.4/redhat/rhel-6-x86_64/pgdg-redhat94-9.4-1.noarch.rpm
• sudo yum install postgresql94-server postgresql94-contrib
• sudo /usr/pgsql-9.4/bin/postgresql94-setup initdb
• sudo systemctl enable postgresql-9.4.service
• sudo systemctl start postgresql-9.4.service

1. PostgreSQL created a user account called postgres. You will need to log into that account with:

• sudo -i -u postgres

1. You can get a PostgreSQL prompt by typing:

• psql

1. Create the Mattermost database by typing:

• postgres=# CREATE DATABASE mattermost;

1. Create the Mattermost user by typing:

• postgres=# CREATE USER mmuser WITH PASSWORD 'mmuser_password';

1. Grant the user access to the Mattermost database by typing:

• postgres=# GRANT ALL PRIVILEGES ON DATABASE mattermost to mmuser;

1. You can exit out of PostgreSQL by typing:

• postgres=# \q

1. You can exit the Postgres account by typing:

• exit

1. Allow Postgres to listen on all assigned IP Addresses:

• sudo vi /var/lib/pgsql/9.4/data/postgresql.conf
• Uncomment 'listen_addresses' and change 'localhost' to '*'

1. Alter pg_hba.conf to allow the Mattermost Server to talk to the Postgres database:

• sudo vi /var/lib/pgsql/9.4/data/pg_hba.conf
• Add the following line to the 'IPv4 local connections':
• host all all 10.10.10.2/32 md5

1. Reload Postgres database:

• sudo systemctl reload postgresql-9.4.service

1. Attempt to connect with the new created user to verify everything looks good:

• psql --host=10.10.10.1 --dbname=mattermost --username=mmuser --password
• mattermost=> \q

Set up Mattermost Server

1. For the purposes of this guide we will assume this server has an IP address of 10.10.10.2
2. Download the latest Mattermost Server by typing:

• wget https://github.com/mattermost/platform/releases/download/v1.3.0/mattermost.tar.gz

1. Install Mattermost under /opt
   • Unzip the Mattermost Server by typing:
   • tar -xvzf mattermost.tar.gz
   • sudo mv mattermost /opt
2. Create the storage directory for files. We assume you will have attached a large drive for storage of images and files. For this setup we will assume the directory is located at /opt/mattermost/data.

• Create the directory by typing:
• sudo mkdir -p /opt/mattermost/data

1. Create a system user and group called mattermost that will run this service:
   • sudo useradd -r mattermost -U
   • Set the Mattermost account as the directory owner by typing:
   • sudo chown -R mattermost:mattermost /opt/mattermost
   • sudo chmod -R g+w /opt/mattermost
   • Add yourself to the mattermost group to ensure you can edit these files:
   • sudo usermod -aG mattermost USERNAME
2. Configure Mattermost Server by editing the config.json file at /opt/mattermost/config

• cd /opt/mattermost/config
• Edit the file by typing:
• sudo vi config.json
• replace DriverName": "mysql" with DriverName": "postgres"
• replace "DataSource": "mmuser:mostest@tcp(dockerhost:3306)/mattermost_test?charset=utf8mb4,utf8" with "DataSource": "postgres://mmuser:mmuser_password@10.10.10.1:5432/mattermost?sslmode=disable&connect_timeout=10"
• Optionally you may continue to edit configuration settings in config.json or use the System Console described in a later section to finish the configuration.

1. Test the Mattermost Server

• cd /opt/mattermost/bin
• Run the Mattermost Server by typing:
• ./platform
• You should see a console log like Server is listening on :8065 letting you know the service is running.
• Stop the server for now by typing Ctrl-C

1. Set up Mattermost to use the systemd init daemon which handles supervision of the Mattermost process:

• sudo touch /etc/systemd/system/mattermost.service
• sudo vi /etc/systemd/system/mattermost.service
• Copy the following lines into /etc/systemd/system/mattermost.service

[Unit]
Description=Mattermost
After=syslog.target network.target

[Service]
Type=simple
WorkingDirectory=/opt/mattermost/bin
User=mattermost
ExecStart=/opt/mattermost/bin/platform
PIDFile=/var/spool/mattermost/pid/master.pid

[Install]
WantedBy=multi-user.target

• Make sure the service is executable with sudo chmod 664 /etc/systemd/system/mattermost.service
• Reload the services with sudo systemctl daemon-reload
• Start Mattermost service with sudo systemctl start mattermost.service
• sudo chkconfig mattermost on
• Start server on reboot sudo systemctl enable mattermost.service

Set up Nginx Server

1. For the purposes of this guide we will assume this server has an IP address of 10.10.10.3
2. We use Nginx for proxying request to the Mattermost Server. The main benefits are:

• SSL termination
• HTTP to HTTPS redirect
• Port mapping :80 to :8065
• Standard request logs

1. Install Nginx on RHEL with

• sudo vi /etc/yum.repos.d/nginx.repo
• Copy the below into the file

[nginx]
name=nginx repo
baseurl=http://nginx.org/packages/rhel/7/$basearch/
gpgcheck=0
enabled=1

• sudo yum install nginx.x86_64
• sudo service nginx start
• sudo chkconfig nginx on

1. Verify Nginx is running

• curl http://10.10.10.3
• You should see a Welcome to nginx! page

1. Map a FQDN (fully qualified domain name) like mattermost.example.com to point to the Nginx server.
2. Configure Nginx to proxy connections from the internet to the Mattermost Server

• Create a configuration for Mattermost
• sudo touch /etc/nginx/conf.d/mattermost.conf
• Below is a sample configuration with the minimum settings required to configure Mattermost

   server {
      server_name mattermost.example.com;

      location / {
         client_max_body_size 50M;
         proxy_set_header Upgrade $http_upgrade;
         proxy_set_header Connection "upgrade";
         proxy_set_header Host $http_host;
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
         proxy_set_header X-Forwarded-Proto $scheme;
         proxy_set_header X-Frame-Options SAMEORIGIN;
         proxy_pass http://10.10.10.2:8065;
      }
   }

• Remove the existing file with:
• sudo mv /etc/nginx/conf.d/default.conf /etc/nginx/conf.d/default.conf.bak
• Restart Nginx by typing:
• sudo service nginx restart
• Verify you can see Mattermost thru the proxy by typing:
• curl http://localhost
• You should see a page titles Mattermost - Signup
• Not seeing the page? Look for errors with sudo cat /var/log/audit/audit.log | grep nginx | grep denied
• Optional if you're running on the same server as the Mattermost server and see 502 errors you may need to run sudo setsebool -P httpd_can_network_connect true because SELinux is preventing the connection

Set up Nginx with SSL (Recommended)

1. You will need a SSL cert from a certificate authority.
2. For simplicity we will generate a test certificate.

• mkdir /top/mattermost/cert
• cd /top/mattermost/cert
• sudo openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout mattermost.key -out mattermost.crt
• Input the following info

    Country Name (2 letter code) [AU]:US
    State or Province Name (full name) [Some-State]:California
    Locality Name (eg, city) []:Palo Alto
    Organization Name (eg, company) [Internet Widgits Pty Ltd]:Example LLC
    Organizational Unit Name (eg, section) []:
    Common Name (e.g. server FQDN or YOUR name) []:mattermost.example.com
    Email Address []:admin@mattermost.example.com

1. Run openssl dhparam -out dhparam.pem 4096 (it will take some time).
2. Modify the file at /etc/nginx/conf.d/mattermost.conf and add the following lines

  server {
     listen         80;
     server_name    mattermost.example.com;
     return         301 https://$server_name$request_uri;
  }

  server {
     listen 443 ssl;
     server_name mattermost.example.com;

     ssl on;
     ssl_certificate /home/ubuntu/cert/mattermost.crt;
     ssl_certificate_key /home/ubuntu/cert/mattermost.key;
     ssl_dhparam /home/ubuntu/cert/dhparam.pem;
     ssl_session_timeout 5m;
     ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
     ssl_ciphers 'EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH';
     ssl_prefer_server_ciphers on;
     ssl_session_cache shared:SSL:10m;

     location / {
        gzip off;
        proxy_set_header X-Forwarded-Ssl on;
        client_max_body_size 50M;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $http_host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Frame-Options SAMEORIGIN;
        proxy_pass http://10.10.10.2:8065;
     }
  }

Finish Mattermost Server setup

1. Navigate to https://mattermost.example.com and create a team and user.
2. The first user in the system is automatically granted the system_admin role, which gives you access to the System Console.
3. From the town-square channel click the dropdown and choose the System Console option
4. Update Email Settings. We recommend using an email sending service. The example below assumes AmazonSES.

• Set Send Email Notifications to true
• Set Require Email Verification to true
• Set Feedback Name to No-Reply
• Set Feedback Email to mattermost@example.com
• Set SMTP Username to AFIADTOVDKDLGERR
• Set SMTP Password to DFKJoiweklsjdflkjOIGHLSDFJewiskdjf
• Set SMTP Server to email-smtp.us-east-1.amazonaws.com
• Set SMTP Port to 465
• Set Connection Security to TLS
• Save the Settings

1. Update File Settings:

• Change Local Directory Location from ./data/ to /opt/mattermost/data

1. Update Log Settings:

• Set Log to The Console to false

1. Update Rate Limit Settings:

• Set Vary By Remote Address to false
• Set Vary By HTTP Header to X-Real-IP

1. Feel free to modify other settings
2. Restart the Mattermost Service by typing:

• sudo restart mattermost