kasm Installation Guide Installation Guide

kasm is a free and open-source browser isolation. Kasm provides browser isolation and remote apps

Hardware Requirements:

CPU: 4+ cores

RAM: 8GB minimum

Storage: 50GB for images

Network: HTTPS/WebSocket

Operating System:

Linux: Any modern distribution (RHEL, Debian, Ubuntu, CentOS, Fedora, Arch, Alpine, openSUSE)

macOS: 10.14+ (Mojave or newer)

Windows: Windows Server 2016+ or Windows 10

FreeBSD: 11.0+

Network Requirements:

Port 443 (default kasm port)

Various services

Dependencies:

See official documentation for specific requirements

System Access: root or sudo privileges required

This guide supports installation on:

RHEL 8/9 and derivatives (CentOS Stream, Rocky Linux, AlmaLinux)

Debian 11/12

Ubuntu 20.04/22.04/24.04 LTS

Arch Linux (rolling release)

Alpine Linux 3.18+

openSUSE Leap 15.5+ / Tumbleweed

SUSE Linux Enterprise Server (SLES) 15+

macOS 12+ (Monterey and later)

FreeBSD 13+

Windows 10/11/Server 2019+ (where applicable)

bash

# Install EPEL repository if needed
sudo dnf install -y epel-release

# Install kasm
sudo dnf install -y kasm

# Enable and start service
sudo systemctl enable --now kasm

# Configure firewall
sudo firewall-cmd --permanent --add-port=443/tcp
sudo firewall-cmd --reload

# Verify installation
kasm --version

bash

# Update package index
sudo apt update

# Install kasm
sudo apt install -y kasm

# Enable and start service
sudo systemctl enable --now kasm

# Configure firewall
sudo ufw allow 443

# Verify installation
kasm --version

bash

# Install kasm
sudo pacman -S kasm

# Enable and start service
sudo systemctl enable --now kasm

# Verify installation
kasm --version

bash

# Install kasm
apk add --no-cache kasm

# Enable and start service
rc-update add kasm default
rc-service kasm start

# Verify installation
kasm --version

bash

# Install kasm
sudo zypper install -y kasm

# Enable and start service
sudo systemctl enable --now kasm

# Configure firewall
sudo firewall-cmd --permanent --add-port=443/tcp
sudo firewall-cmd --reload

# Verify installation
kasm --version

bash

# Using Homebrew
brew install kasm

# Start service
brew services start kasm

# Verify installation
kasm --version

bash

# Using pkg
pkg install kasm

# Enable in rc.conf
echo 'kasm_enable="YES"' >> /etc/rc.conf

# Start service
service kasm start

# Verify installation
kasm --version

bash

# Using Chocolatey
choco install kasm

# Or using Scoop
scoop install kasm

# Verify installation
kasm --version

bash

# Create configuration directory
sudo mkdir -p /etc/kasm

# Set up basic configuration
# See official documentation for detailed configuration options

# Test configuration
kasm --version

bash

# Enable service
sudo systemctl enable kasm

# Start service
sudo systemctl start kasm

# Stop service
sudo systemctl stop kasm

# Restart service
sudo systemctl restart kasm

# Check status
sudo systemctl status kasm

# View logs
sudo journalctl -u kasm -f

bash

# Enable service
rc-update add kasm default

# Start service
rc-service kasm start

# Stop service
rc-service kasm stop

# Restart service
rc-service kasm restart

# Check status
rc-service kasm status

bash

# Enable in /etc/rc.conf
echo 'kasm_enable="YES"' >> /etc/rc.conf

# Start service
service kasm start

# Stop service
service kasm stop

# Restart service
service kasm restart

# Check status
service kasm status

bash

# Using Homebrew services
brew services start kasm
brew services stop kasm
brew services restart kasm

# Check status
brew services list | grep kasm

powershell

# Start service
net start kasm

# Stop service
net stop kasm

# Using PowerShell
Start-Service kasm
Stop-Service kasm
Restart-Service kasm

# Check status
Get-Service kasm

See the official documentation for advanced configuration options.

nginx

upstream kasm_backend {
    server 127.0.0.1:443;
}

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

server {
    listen 443 ssl http2;
    server_name kasm.example.com;

    ssl_certificate /etc/ssl/certs/kasm.example.com.crt;
    ssl_certificate_key /etc/ssl/private/kasm.example.com.key;

    location / {
        proxy_pass http://kasm_backend;
        proxy_set_header Host $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;
    }
}

apache

<VirtualHost *:80>
    ServerName kasm.example.com
    Redirect permanent / https://kasm.example.com/
</VirtualHost>

<VirtualHost *:443>
    ServerName kasm.example.com
    
    SSLEngine on
    SSLCertificateFile /etc/ssl/certs/kasm.example.com.crt
    SSLCertificateKeyFile /etc/ssl/private/kasm.example.com.key
    
    ProxyRequests Off
    ProxyPreserveHost On
    
    ProxyPass / http://127.0.0.1:443/
    ProxyPassReverse / http://127.0.0.1:443/
</VirtualHost>

haproxy

frontend kasm_frontend
    bind *:80
    bind *:443 ssl crt /etc/ssl/certs/kasm.pem
    redirect scheme https if !{ ssl_fc }
    default_backend kasm_backend

backend kasm_backend
    balance roundrobin
    server kasm1 127.0.0.1:443 check

bash

# Set appropriate permissions
sudo chown -R kasm:kasm /etc/kasm
sudo chmod 750 /etc/kasm

# Configure firewall
sudo firewall-cmd --permanent --add-port=443/tcp
sudo firewall-cmd --reload

# Enable SELinux policies (if applicable)
sudo setsebool -P httpd_can_network_connect on

See official documentation for database configuration requirements.

bash

# Basic system tuning
echo 'net.core.somaxconn = 65535' | sudo tee -a /etc/sysctl.conf
echo 'net.ipv4.tcp_max_syn_backlog = 65535' | sudo tee -a /etc/sysctl.conf
sudo sysctl -p

bash

# Check service status
sudo systemctl status kasm

# View logs
sudo journalctl -u kasm -f

# Monitor resource usage
top -p $(pgrep kasm)

bash

#!/bin/bash
# Basic backup script
BACKUP_DIR="/backup/kasm"
DATE=$(date +%Y%m%d_%H%M%S)

mkdir -p "$BACKUP_DIR"
tar -czf "$BACKUP_DIR/kasm-backup-$DATE.tar.gz" /etc/kasm /var/lib/kasm

echo "Backup completed: $BACKUP_DIR/kasm-backup-$DATE.tar.gz"

bash

# Stop service
sudo systemctl stop kasm

# Restore from backup
tar -xzf /backup/kasm/kasm-backup-*.tar.gz -C /

# Start service
sudo systemctl start kasm

1. Service won't start:

bash

# Check logs
sudo journalctl -u kasm -n 100
sudo tail -f /var/log/kasm/kasm.log

# Check configuration
kasm --version

# Check permissions
ls -la /etc/kasm

2. Connection issues:

bash

# Check if service is listening
sudo ss -tlnp | grep 443

# Test connectivity
telnet localhost 443

# Check firewall
sudo firewall-cmd --list-all

3. Performance issues:

bash

# Check resource usage
top -p $(pgrep kasm)

# Check disk I/O
iotop -p $(pgrep kasm)

# Check connections
ss -an | grep 443

yaml

version: '3.8'
services:
  kasm:
    image: kasm:latest
    ports:
      - "443:443"
    volumes:
      - ./config:/etc/kasm
      - ./data:/var/lib/kasm
    restart: unless-stopped

Maintenance

bash

# RHEL/CentOS/Rocky/AlmaLinux
sudo dnf update kasm

# Debian/Ubuntu
sudo apt update && sudo apt upgrade kasm

# Arch Linux
sudo pacman -Syu kasm

# Alpine Linux
apk update && apk upgrade kasm

# openSUSE
sudo zypper update kasm

# FreeBSD
pkg update && pkg upgrade kasm

# Always backup before updates
tar -czf /backup/kasm-pre-update-$(date +%Y%m%d).tar.gz /etc/kasm

# Restart after updates
sudo systemctl restart kasm

Regular Maintenance

bash

# Log rotation
sudo logrotate -f /etc/logrotate.d/kasm

# Clean old logs
find /var/log/kasm -name "*.log" -mtime +30 -delete

# Check disk usage
du -sh /var/lib/kasm

Official Documentation: https://docs.kasm.org/

GitHub Repository: https://github.com/kasm/kasm

Community Forum: https://forum.kasm.org/

Best Practices Guide: https://docs.kasm.org/best-practices

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Note: This guide is part of the HowToMgr collection. Always refer to official documentation for the most up-to-date information.

1. Prerequisites

2. Supported Operating Systems

3. Installation

RHEL/CentOS/Rocky Linux/AlmaLinux

Debian/Ubuntu

Arch Linux

Alpine Linux

openSUSE/SLES

macOS

FreeBSD

Windows

Initial Configuration

Basic Configuration

5. Service Management

systemd (RHEL, Debian, Ubuntu, Arch, openSUSE)

OpenRC (Alpine Linux)

rc.d (FreeBSD)

launchd (macOS)

Windows Service Manager

Advanced Configuration

Reverse Proxy Setup

nginx Configuration

Apache Configuration

HAProxy Configuration

Security Configuration

Basic Security Setup

Database Setup

Performance Optimization

System Tuning

Monitoring

Basic Monitoring

9. Backup and Restore

Backup Script

Restore Procedure

6. Troubleshooting

Common Issues

Integration Examples

Docker Compose Example

Maintenance

Update Procedures

Regular Maintenance

Additional Resources

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