Step-by-Step Guide to Deploying Mattermost on AWS (2025)

Meta Description:

This Step-by-step guide to developing Mattermost, helps DevOps engineers, admins, and developers to set up a secure, scalable platform. For deploying Mattermost on AWS with EC2, RDS, S3, NGINX, and SMTP.

Introduction:

Effective team communication is very important for a smooth workflow. Mattermost, an open-source, self-hosted messaging platform, provides secure and flexible collaboration for businesses and developers. Deploying Mattermost on Amazon Web Services (AWS) ensures high availability, scalability, and security. This guide offers a detailed, step-by-step lead for deploying Mattermost__ a secure, self-hosted alternative to Slack, on AWS EC2.

You’ll learn how to configure AWS RDS for efficient database management, set up AWS S3 for reliable media storage, and integrate SMTP (smtp.titan.email) to enable email notifications. Additionally, this guide addresses common setup challenges and provides troubleshooting solutions, ensuring technical teams can replicate the deployment smoothly and optimize Mattermost for scalability, security, and high performance.

This blog  will provide a  Comprehensive technical guide on deploying Mattermost on AWS with:

• EC2 for hosting
• RDS (PostgreSQL) for database management
• S3 for media storage
• NGINX as a reverse proxy
• SMTP for email notifications

By the end of this blog, you’ll have a fully functional Mattermost instance running on AWS.

Prerequisites:

Step-by-step guide to developing Mattermost on AWS, we need the following prerequisites:

• AWS Account: Access to AWS Management Console.
• Domain Name: Required for configuring SSL and secure access, for example.digitalux.pk.
• SSL Certificate: Obtainable via Let’s Encrypt or another certificate authority.
• SSH Key Pair: This is for secure access to your EC2 instance.
• SMTP Credentials: Using SMTP for email notifications. Examples, are Amazon SES and SendGrid.
• AWS IAM User: With permissions to create and manage EC2, RDS, and S3 resources.
• Basic Knowledge: Familiarity with Linux command-line operations, AWS services, and Mattermost configurations.

Step-by-Step Guide to Deploying Mattermost on AWS:

For deploying Mattermost On AWS, we follow the following steps:

Step 1: Create an AWS EC2 Instance:

Installing and running the Mattermost server on an AWS EC2 instance (a virtual machine in the cloud) is the first step.

1.1. Choose an Amazon Machine Image (AMI)

1. Log in to the AWS Management Console.
2. Navigate to EC2 Dashboard.
3. Click on “Launch Instance”.
4. Select an AMI:
   • Ubuntu Server 22.04 LTS is recommended for its stability and support.

1.2. Choose an Instance Type

• t3.medium or larger is recommended for Mattermost, depending on expected load.

1.3. Configure Instance Details

1. Number of Instances: 1
2. Network: Choose your VPC or default.
3. Subnet: Select a public subnet if you need internet access.
4. Auto-assign Public IP: Enable.

1.4. Add Storage

• Root Volume: 20 GB (minimum).
• Additional Storage: As needed based on expected data.

1.5. Configure Security Group

Ensure the following inbound rules are set:

Type	Protocol	Port Range	Source	Description
SSH	TCP	22	Your IP (x.x.x.x/32)	Allow SSH access
HTTP	TCP	80	Anywhere (0.0.0.0/0)	Allow web traffic
HTTPS	TCP	443	Anywhere (0.0.0.0/0)	Allow secure web traffic
Custom TCP	TCP	8065	Anywhere (0.0.0.0/0)	Mattermost server port

Note: Restrict SSH access to your IP for security.

1.6. Review and Launch

1. Review all settings.
2. Click “Launch”.
3. Select your existing SSH key pair or create a new one.
4. Click “Launch Instances”.

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Step 2: Configuring AWS RDS for Mattermost

2.1. Launching an RDS Instance

1. Navigate to the AWS RDS Console.
2. Click “Create database”.
3. Choose “Standard Create”.
4. Engine Options: Select PostgreSQL (Mattermost supports PostgreSQL).
5. Version: Choose a stable version (e.g., PostgreSQL 14).
6. Templates: Select “Free tier” if eligible, else “Production”.
7. DB Instance Identifier: your-db-instance-id.
8. Master Username: mmuser.
9. Master Password: Create a strong password and confirm.
10. DB Instance Size: Start with db.t3.medium.
11. Storage: Allocate sufficient storage based on your needs.
12. Connectivity:
    • Virtual Private Cloud (VPC): Same as your EC2 instance.
    • Public Access: Disable if only EC2 needs access.
    • Security Groups: Create a new security group allowing EC2 to communicate with RDS on port 5432.
13. Additional Configuration:
    • Initial Database Name: mattermost.
    • Backup Retention Period: As per your backup strategy.
    • Enable Encryption: If required.
14. Click “Create database”.

2.2. Configure Security Groups for RDS

1. Navigate to EC2 Dashboard > Security Groups.
2. Select the security group associated with your RDS instance.
3. Add an inbound rule:

Type	Protocol	Port Range	Source	Description
PostgreSQL	TCP	5432	EC2 Security Group ID	Allow EC2 to access RDS

Note: Replace EC2 Security Group ID with the actual ID of your EC2 instance’s security group.

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Step 3: Configuring AWS S3 for Mattermost Media Storage

3.1. Create an S3 Bucket

1. Navigate to the AWS S3 Console.
2. Click “Create bucket”.
3. Bucket Name: your-bucket-name (Ensure the name is unique globally)
4. Region: Choose the same region as your EC2 and RDS instances for lower latency.
5. Block Public Access: Enable to prevent public access.
6. Bucket Versioning: Enable if you want to keep versions of objects.
7. Tags: Add tags as needed.
8. Click “Create bucket”.

3.2. Configure IAM Role and Policy for S3 Access

To allow Mattermost to interact with S3 securely, create an IAM role with the necessary permissions.

a. Create an IAM Policy

1. Navigate to the AWS IAM Console.
2. Click “Policies” > “Create policy”.
3. Switch to the JSON tab and paste the following policy, replacing your-bucket-name with your actual bucket name:

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": [
                "s3:ListBucket"
            ],
            "Resource": [
                "arn:aws:s3:::your-bucket-name"
            ]
        },
        {
            "Effect": "Allow",
            "Action": [
                "s3:GetObject",
                "s3:PutObject",
                "s3:DeleteObject"
            ],
            "Resource": [
                "arn:aws:s3:::your-bucket-name/*"
            ]
        }
    ]
}

1. Click “Review policy”.
2. Name: MattermostS3AccessPolicy.
3. Description: Policy to allow Mattermost access to S3 bucket for media storage.
4. Click “Create policy”.

b. Create an IAM Role

1. Navigate to “Roles” > “Create role”.
2. Trusted entity type: Select “EC2”.
3. Click “Next: Permissions”.
4. Attach Policy: Search for MattermostS3AccessPolicy and select it.
5. Click “Next: Tags”. (Add tags if needed)
6. Click “Next: Review”.
7. Role Name: MattermostS3AccessRole.
8. Description: IAM role for Mattermost to access S3 bucket for media storage.
9. Click “Create role”.

c. Attach IAM Role to EC2 Instance

1. Navigate to EC2 Dashboard > Instances.
2. Select your Mattermost EC2 instance.
3. Click “Actions” > “Security” > “Modify IAM role”.
4. IAM Role: Select MattermostS3AccessRole.
5. Click “Update IAM role”.

3.3. Configure S3 in Mattermost

Setting	Value	Description
Amazon S3 Access Key ID:	(Leave blank if using IAM Role)	Not required if IAM role is attached to EC2 instance.
Amazon S3 Secret Access Key:	(Leave blank if using IAM Role)	Not required if IAM role is attached to EC2 instance.
Amazon S3 Bucket:	your-bucket-name	Your S3 bucket name.
Amazon S3 Region:	(Select your bucket’s region)	e.g., eu-north-1
Use SSL:	True	Enable SSL for secure connections.
Bucket Path:	(Optional)	Path within the bucket to store files.
Endpoint:	(Leave blank unless using a custom endpoint)	For standard S3 usage, leave blank.
Force Path Style:	False	Typically, False unless required by your setup.

5. Save the Configuration:
   • Click “Save” to apply the settings.
6. Verify S3 Integration:
   • Upload a file in Mattermost and ensure it’s stored in the S3 bucket.

Step 4: Installing and Configuring Mattermost on EC2

4.1. Connect to Your EC2 Instance

Use SSH to connect:

ssh -i /path/to/your/private-key.pem ubuntu@ec2-16-171-171-121.eu-north-1.compute.amazonaws.com

4.2. Update and Install Dependencies

sudo apt update && sudo apt upgrade -y
sudo apt install -y wget curl gnupg2 software-properties-common

4.3. Install and Configure PostgreSQL Client

sudo apt install -y postgresql-client

4.4. Download and Install Mattermost

1. Download Mattermost:

wget <https://releases.mattermost.com/7.3.1/mattermost-7.3.1-linux-amd64.tar.gz>

2. Extract the Archive:

tar -xvzf mattermost-7.3.1-linux-amd64.tar.gz
sudo mv mattermost /opt
sudo mkdir /opt/mattermost/data

3. Create a Mattermost User:

sudo useradd --system --user-group mattermost
sudo chown -R mattermost:mattermost /opt/mattermost
sudo chmod -R g+w /opt/mattermost

4.5. Configure Mattermost to Use AWS RDS

1. Edit Configuration File:

sudo nano /opt/mattermost/config/config.json

2. Update Database Settings:

Locate the SqlSettings section and update as follows:

"SqlSettings": {
    "DriverName": "postgres",
    "DataSource": "postgres://mmuser:s3cr3tpassword@mattermost-db.cfq2jxyzabcd.us-east-1.rds.amazonaws.com:5432/mattermost?sslmode=require&connect_timeout=10",
    ...
},

Replace:

1. Update Database Settings:

Locate the SqlSettings section and update as follows:

"SqlSettings": {
    "DriverName": "postgres",
    "DataSource": "postgres://mmuser:s3cr3tpassword@mattermost-db.cfq2jxyzabcd.us-east-1.rds.amazonaws.com:5432/mattermost?sslmode=require&connect_timeout=10",
    ...
},

Replace:

• mmuser with your RDS master username.
• s3cr3tpassword with your RDS master password.
• mattermost-db.cfq2jxyzabcd.us-east-1.rds.amazonaws.com with your RDS endpoint.
• Ensure sslmode=require for secure connections.

2. Save and Exit:

• Press Ctrl + O, then Enter.
• Press Ctrl + X to exit.

4.6. Create a Systemd Service for Mattermost

1. Create the Service File:

sudo nano /etc/systemd/system/mattermost.service

2. Add the Following Content:

[Unit]
Description=Mattermost
After=network.target

[Service]
Type=notify
User=mattermost
Group=mattermost
ExecStart=/opt/mattermost/bin/mattermost
Restart=always
RestartSec=10
LimitNOFILE=49152

[Install]
WantedBy=multi-user.target

3. Save and Exit:

• Press Ctrl + O, then Enter.
• Press Ctrl + X to exit.

4. Start and Enable Mattermost Service:

sudo systemctl daemon-reload
sudo systemctl start mattermost
sudo systemctl enable mattermost

5. Verify Service Status:

sudo systemctl status mattermost

Ensure the service is active and running.

Step 5: Setting Up NGINX as a Reverse Proxy

5.1. Install NGINX

sudo apt install -y nginx

5.2. Configure NGINX for Mattermost:

1. Create NGINX Configuration File:

sudo nano /etc/nginx/sites-available/mattermost

Add the Following Configuration:

server {
    listen 80;
    server_name chat.digitalux.pk;

    # Redirect all HTTP requests to HTTPS
    return 301 https://$host$request_uri;
}

server {
    listen 443 ssl;
    server_name chat.digitalux.pk;

    ssl_certificate /etc/letsencrypt/live/chat.digitalux.pk/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/chat.digitalux.pk/privkey.pem;

    # Increase upload size limit
    client_max_body_size 100M;

    location / {
        proxy_pass <http://localhost:8065>;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_buffering off;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
    }
}

Note:

• Ensure SSL certificates are correctly placed.
• Adjust server_name to your domain.

3. Enable the Configuration:

sudo ln -s /etc/nginx/sites-available/mattermost /etc/nginx/sites-enabled/

4. Test NGINX Configuration:

sudo nginx -t

Expected Output:

nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful

5. Reload NGINX:

sudo systemctl reload nginx

5.3. Obtain and Install SSL Certificates

Use Certbot for Let’s Encrypt SSL certificates.

1. Install Certbot:

sudo apt install -y certbot python3-certbot-nginx

2. Obtain SSL Certificate:

sudo certbot --nginx -d chat.digitalux.pk

3. Follow Prompts:

• Enter your email.
• Agree to terms.
• Choose to redirect HTTP to HTTPS.

4. Automate Certificate Renewal:

Certbot sets up a cron job by default. Verify with:

sudo systemctl status certbot.timer

Step 6: Configuring SMTP for Email Notifications

After initial SMTP configuration attempts with Hostinger failed, switching to smtp.titan.email resolved the issue. Below is the step-by-step guide for configuring SMTP using Titan’s SMTP server.

6.1. Gather SMTP Credentials from Titan

• SMTP Server (Outgoing): smtp.titan.email
• SMTP Server Port:
  • SSL: 465
  • STARTTLS: 587
• Encryption:
  • SSL for port 465
  • STARTTLS for port 587
• Username: your-username
• Password: your-password (Ensure this is correct and complete)

6.2. Access Mattermost’s System Console

1. Log In to Mattermost:
   • Navigate to your-mattermost-url.
   • Log in with your admin account.
2. Navigate to System Console:
   • Click on your profile picture/avatar in the top-right corner.
   • Select “System Console” from the dropdown menu.

6.3. Configure Email Settings in Mattermost

1. Navigate to Email Settings:
   • In the System Console sidebar, go to “Notifications” > “Email”.

2. Fill in the SMTP Configuration:

Setting	Value	Description
SMTP Server:	smtp.titan.email	Hostname of Titan’s SMTP server.
SMTP Server Port:	465 (for SSL) or 587 (for STARTTLS)	Port number based on the encryption method you choose.
Enable SMTP Authentication:	True	Enable SMTP Authentication to allow Mattermost to authenticate with the SMTP server.
SMTP Server Username:	your-username	Your full email address as the SMTP username.
SMTP Server Password:	`s9XL	EfOGb1mC_KHideCopy`
Connection Security:	SSL or STARTTLS	Choose SSL if you’re using port 465 or STARTTLS if you’re using port 587.
Skip Server Certificate Verification:	False	Recommended: Keep this False to ensure secure email transmission. Set to True only if necessary.
Enable Security Alerts:	True	Enable to receive security-related email alerts from Mattermost.

3. Detailed Configuration Steps:

• SMTP Server: Enter smtp.titan.email.
• SMTP Server Port:
  • Option 1: Use port 465 with SSL.
  • Option 2: Use port 587 with STARTTLS.
• Enable SMTP Authentication: Toggle to True.
• SMTP Server Username: Enter your-username.
• SMTP Server Password: Enter your-password. (Ensure this is the complete password)
• Connection Security:
  • Select SSL for port 465.
  • Select STARTTLS for port 587.
• Skip Server Certificate Verification: Set to False.
• Enable Security Alerts: Toggle to True.

4. Save the Configuration:
   • Click “Save” or “Apply” to update the settings.

• SMTP Server: Enter smtp.titan.email.
• SMTP Server Port:
  • Option 1: Use port 465 with SSL.
  • Option 2: Use port 587 with STARTTLS.
• Enable SMTP Authentication: Toggle to True.
• SMTP Server Username: Enter your-username.
• SMTP Server Password: Enter your-password. (Ensure this is the complete password)
• Connection Security:
  • Select SSL for port 465.
  • Select STARTTLS for port 587.
• Skip Server Certificate Verification: Set to False.
• Enable Security Alerts: Toggle to True.

4. Save the Configuration:
Click “Save” or “Apply” to update the settings.

6.4. Test the SMTP Configuration

1. Send a Test Email:
   • In the Email settings page, locate the “Send Test Email” button.
   • Enter a valid recipient email address (preferably one you have access to).
   • Click “Send Test Email”.
2. Verify Receipt:
   • Check the inbox of the recipient’s email address to confirm receipt.
   • If the test email is received successfully, your SMTP configuration is working.

6.5. Documented Issues and Resolutions

Issue 1: Initial SMTP Configuration with Hostinger Failed

• Error Message:

Connection unsuccessful: authentication failed: 535 5.7.8 Error: authentication failed: (reason unavailable)

• Cause: Hostinger’s SMTP settings were not compatible or had restrictions preventing successful authentication.
• Resolution: Switching to Titan’s SMTP server (smtp.titan.email) resolved the authentication issues.

Issue 2: Thunderbird Failed to Auto-Detect SMTP Settings

• Error Message:

Thunderbird failed to find the settings for your email account.

• Cause: Thunderbird couldn’t auto-configure SMTP settings, likely due to missing or incorrect configuration details.
• Resolution: Manually configured Thunderbird with accurate SMTP settings from Titan, ensuring the correct server, port, encryption, and credentials were used.

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Step 7: Troubleshooting Common Issues

This section documents the challenges faced during the setup process and their solutions to aid future troubleshooting.

7.1. NGINX Configuration for File Uploads

Problem: Unable to Upload Files Larger Than 1MB

• Symptom: Users could upload files smaller than 1MB but received an error when attempting larger uploads.

• Error Message:

There was a problem uploading your files.

• Cause: NGINX’s default client_max_body_size was set to 1MB, limiting the size of client requests.

• Solution:
  1. Edit NGINX Configuration:

sudo nano /etc/nginx/sites-available/mattermost

1. Add/Modify client_max_body_size:

2. Add/ Modify client_max_body_size:

client_max_body_size 100M;

3. Save and Exit:

• Press Ctrl + O, then Enter.
• Press Ctrl + X to exit.

4. Test NGINX Configuration:

sudo nginx -t

5. Reload NGINX:

sudo systemctl reload nginx

6. Verify in Mattermost:

• Attempt to upload a file larger than 1MB to ensure the issue is resolved.

7.2. SSH Connectivity Issues to EC2 Instance

Problem: SSH Connection Timed Out

• Symptom:

ssh: connect to host ec2-16-171-171-121.eu-north-1.compute.amazonaws.com port 22: Operation timed out

• Cause: Likely due to incorrect security group settings, network ACLs blocking SSH traffic, or SSH daemon misconfigurations.
• Solution:
  1. Verify EC2 Instance Status:
     • Ensure the instance is Running in the AWS Console.
  2. Check Security Groups:
     • Ensure inbound rules allow SSH (port 22) from your IP.
  3. Review Network ACLs:
     • Confirm that Network ACLs permit SSH traffic.
  4. Confirm Public IP/DNS:
     • Use the correct public IP or DNS in your SSH command.
  5. Check Internal Firewall:
     • Ensure iptables or other firewalls on the instance allow SSH traffic.
  6. Restart SSH Service:

sudo systemctl restart sshd

7. Attempt SSH Connection Again:

ssh -i /path/to/your/private-key.pem ubuntu@ec2-16-171-171-121.eu-north-1.compute.amazonaws.com

8. Contact AWS Support:

• If issues persist, reach out to AWS Support for assistance.

7.3. SMTP Authentication Failures with Hostinger

• Symptom:

Connection unsuccessful: authentication failed: 535 5.7.8 Error: authentication failed: (reason unavailable)

• Cause: Incorrect SMTP credentials, Hostinger’s SMTP restrictions, or misconfigurations in Mattermost’s SMTP settings.
• Solution:
  1. Verify Credentials:
     • Ensure the SMTP username and complete password are correct.
  2. Test with Email Client:
     • Use Thunderbird to confirm SMTP settings work outside of Mattermost.
  3. Adjust SMTP Settings:
     • Try different ports and encryption methods.
  4. Contact Hostinger Support:
     • Verify if there are specific SMTP requirements or restrictions on your account.

7.4. Thunderbird Failing to Detect Email Settings

• Symptom:

Thunderbird failed to find the settings for your email account.

• Cause: Auto-detection failure due to missing or incorrect SMTP configurations.
• Solution:
  1. Manually Configure Thunderbird:
     • Enter SMTP server details accurately as per Titan’s guidelines.
  2. Ensure Correct Encryption and Ports:
     • Match encryption method with the appropriate port (SSL with 465, STARTTLS with 587).
  3. Verify Credentials:
     • Double-check the SMTP username and complete password.

7.5. EC2 Instance Connect Failures

• Symptom:

EC2 Instance Connect is unable to connect to your instance. Ensure your instance network settings are configured correctly for EC2 Instance Connect.

• Cause: Missing EC2 Instance Connect installation, incorrect network settings, or security group misconfigurations.

• Solution:
  1.Ensure EC2 Instance Connect is Installed:

sudo apt update
sudo apt install ec2-instance-connect -y

2. Configure SSHD for EC2 Instance Connect:

sudo nano /etc/ssh/sshd_config

• Ensure the following lines are present:

PubkeyAuthentication yes
AuthorizedKeysCommand /opt/aws/bin/eic_run_authorized_keys %u %f
AuthorizedKeysCommandUser ec2-instance-connect

3. Restart SSH Service:

sudo systemctl restart sshd

4. Review Security Groups and Network ACLs:

• Ensure SSH traffic is allowed.

5. Use EC2 Instance Connect via AWS Console:

• Attempt to connect again using the AWS Console.

7.6. AWS S3 Configuration Issues

Problem: Mattermost Unable to Store Media in S3

• Symptom: Uploaded media files are not appearing in the S3 bucket or users are unable to access them.
• Cause: Incorrect S3 configuration in Mattermost, IAM role misconfigurations, or network connectivity issues.
• Solution:
  1. Verify S3 Bucket Name and Region:
     • Ensure that the bucket name and region specified in Mattermost match your actual S3 bucket.
  2. Check IAM Role Permissions:
     • Ensure the MattermostS3AccessRole has the correct policies attached.
  3. Confirm EC2 Instance Has the IAM Role Attached:
     • Verify in the AWS Console that the EC2 instance is associated with the correct IAM role.
  4. Test Connectivity to S3:

aws s3 ls s3://mattermost-media-digitalux-pk --region your-region

• Replace your-region with the actual region of your S3 bucket.

5. Review Mattermost Logs for S3 Errors:

• Access Mattermost logs to identify any S3-related errors.

sudo journalctl -u mattermost -f

6. Ensure Correct Configuration in Mattermost:

• Revisit the File Storage settings in the Mattermost System Console to ensure all details are correct.

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Best Practices

Best practices for managing a self-hosted platform include:

1. Implement strong security measures:
   • Restrict SSH Access: Limit SSH access to specific IP addresses.
   • Use SSH Key Pairs: Prefer SSH keys over password-based authentication.
   • Enable Firewall: Use UFW to manage firewall rules.
   • Secure IAM Roles: Follow the principle of least privilege for IAM roles and policies.
2. Monitoring and Logging:
   • Monitor Logs: Regularly check Mattermost, NGINX, and system logs for anomalies.
   • Set Up Alerts: Configure alerts for service downtimes or security breaches.
3. Backup and Recovery:
   • Regular Backups: Schedule regular backups of your RDS database and S3 bucket data.
   • Disaster Recovery Plan: Have a plan in place for data restoration.
4. Maintenance:
   • Update Software: Keep Mattermost, NGINX, and the OS updated to the latest versions.
   • Automate Renewals: Ensure SSL certificates are renewed automatically.
5. Performance Optimization:
   • Scaling: Choose appropriate EC2 instance types based on user load.
   • Caching: Implement caching mechanisms to improve performance.
6. Email Deliverability:
   • SPF, DKIM, DMARC: Set up these DNS records to authenticate your emails.
   • Monitor Sending Limits: Stay within your SMTP provider’s sending limits to avoid being blocked.
7. Choose a reliable server and hosting provider
   • Self-Host Sensitive Data: Avoid third-party dependencies for storing confidential data.
   • Configure Role-Based Access Control (RBAC): Assign permissions based on job roles to restrict unauthorized access.
8. Maintaining full control over your infrastructure
   • Ensuring full control prevents: vendor lock-in and security risks.
   • Self-Host Sensitive Data: Avoid third-party dependencies for storing confidential data.
   • Configure Role-Based Access Control (RBAC): Assign permissions based on job roles to restrict unauthorized access.
9. Regular Performance Testing and Load Balancing

• Conduct Load Testing: Use Apache JMeter, Locust, or AWS Load Testing to evaluate system performance.
• Implement Load Balancers: Distribute traffic using AWS ELB or NGINX Reverse Proxy to improve availability.

10. Ensure Your Platform Meets Business-Specific Needs

• Customize Features and Integrations: Tailor Mattermost settings to meet workflow and collaboration needs.
• Optimize Database Queries: Improve PostgreSQL performance with indexing and query optimization techniques.

Additional Resources

• Mattermost Documentation:
  • Configuring Email
  • Deploying Mattermost on AWS
  • Configuring File Storage
• AWS Documentation:
  • Launching an EC2 Instance
  • Setting Up RDS for PostgreSQL
  • Creating and Managing S3 Buckets
  • IAM Policies and Roles
  • EC2 Instance Connect
• NGINX Documentation:
  • Reverse Proxy Configuration
• SSL/TLS with Let’s Encrypt:
  • Certbot Instructions
• SMTP Providers:
  • Titan Email SMTP Setup
• Troubleshooting:
  • AWS EC2 Troubleshooting SSH
  • Mattermost Logs and Debugging

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Conclusion

Deploying Mattermost on AWS EC2 with AWS RDS, AWS S3, and configuring SMTP for email notifications involves several critical steps, each essential for the seamless operation of your communication platform. By following this guide, you can set up a robust, secure, and efficient Mattermost server tailored to your organization’s needs. Additionally, documenting the challenges encountered and their resolutions serves as a valuable resource for future troubleshooting and for other team members embarking on a similar setup.

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Disclaimer: Always handle sensitive information, such as passwords and SSH keys, securely. Avoid sharing credentials publicly and consider using environment variables or secrets management tools for enhanced security.