Set up Redis 7 with master-replica clustering, SSL/TLS encryption, ACL authentication, and production-grade security hardening. Includes performance tuning, backup strategies, and monitoring configuration for high-availability deployments.

Prerequisites

Root or sudo access
At least 4GB RAM
Network connectivity between cluster nodes
Basic understanding of Redis concepts

What this solves

Redis is a high-performance in-memory data store used for caching, session management, and real-time applications. This tutorial shows you how to install Redis 7 with production-grade clustering, security hardening including SSL/TLS encryption and ACL authentication, plus performance optimization and backup configuration.

Step-by-step installation

Update system packages

Start by updating your package manager to ensure you get the latest versions.

sudo apt update && sudo apt upgrade -y

sudo dnf update -y

Install Redis 7 from official repository

Add the official Redis repository to get the latest Redis 7 version with all security updates.

curl -fsSL https://packages.redis.io/gpg | sudo gpg --dearmor -o /usr/share/keyrings/redis-archive-keyring.gpg
echo "deb [signed-by=/usr/share/keyrings/redis-archive-keyring.gpg] https://packages.redis.io/deb $(lsb_release -cs) main" | sudo tee /etc/apt/sources.list.d/redis.list
sudo apt update
sudo apt install -y redis-server redis-tools

sudo dnf install -y https://packages.redis.io/rpm/el9/x86_64/redis-7.2.4-1.el9.x86_64.rpm

Create Redis user and directories

Create a dedicated redis user and set up proper directory structure with correct permissions.

sudo useradd --system --home /var/lib/redis --shell /bin/false redis
sudo mkdir -p /etc/redis /var/lib/redis /var/log/redis
sudo chown redis:redis /var/lib/redis /var/log/redis
sudo chmod 755 /var/lib/redis
sudo chmod 755 /var/log/redis

Generate SSL certificates for Redis

Create SSL certificates for encrypted client-server and inter-cluster communication.

sudo mkdir -p /etc/redis/tls
cd /etc/redis/tls
sudo openssl genrsa -out ca-key.pem 4096
sudo openssl req -x509 -new -nodes -key ca-key.pem -sha256 -days 3650 -out ca-cert.pem -subj "/C=US/ST=State/L=City/O=Organization/CN=Redis-CA"
sudo openssl genrsa -out redis-key.pem 2048
sudo openssl req -new -key redis-key.pem -out redis.csr -subj "/C=US/ST=State/L=City/O=Organization/CN=redis-server"
sudo openssl x509 -req -in redis.csr -CA ca-cert.pem -CAkey ca-key.pem -CAcreateserial -out redis-cert.pem -days 365 -sha256
sudo chown -R redis:redis /etc/redis/tls
sudo chmod 600 /etc/redis/tls/*.pem
sudo rm redis.csr

Never use chmod 777. It gives every user on the system full access to your files. Instead, fix ownership with chown and use minimal permissions like 600 for private keys.

Configure Redis master node

Create the main Redis configuration with security hardening, SSL, and clustering enabled.

# Network and security
bind 127.0.0.1 203.0.113.10
port 0
tls-port 6380
tls-cert-file /etc/redis/tls/redis-cert.pem
tls-key-file /etc/redis/tls/redis-key.pem
tls-ca-cert-file /etc/redis/tls/ca-cert.pem
tls-protocols "TLSv1.2 TLSv1.3"
tls-ciphersuites TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256
tls-ciphers ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256
protected-mode yes

Authentication and ACL
requirepass Str0ng_R3d1s_P@ssw0rd_2024!
aclfile /etc/redis/users.acl

General configuration
timeout 300
tcp-keepalive 300
daemonize yes
pidfile /var/run/redis/redis-master.pid
loglevel notice
logfile /var/log/redis/redis-master.log

Memory and persistence
maxmemory 2gb
maxmemory-policy allkeys-lru
save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump-master.rdb
dir /var/lib/redis

Append Only File
appendonly yes
appendfilename "appendonly-master.aof"
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb

Clustering
cluster-enabled yes
cluster-config-file nodes-master.conf
cluster-node-timeout 15000
cluster-announce-hostname redis-master.example.com
cluster-announce-port 6380
cluster-announce-tls-port 6380

Security hardening
disable-thp yes
rename-command FLUSHDB ""
rename-command FLUSHALL ""
rename-command DEBUG ""
rename-command CONFIG "CONFIG_8f3a9d2e1b7c6405"

Configure Redis ACL users

Create ACL users with specific permissions for different application roles.

# Default user (disabled)
user default off

Admin user with full access
user admin on >Adm1n_R3d1s_P@ss_2024! allcommands allkeys

Application user with limited permissions
user app_user on >App_R3d1s_P@ss_2024! ~app:* +@read +@write +@string +@list +@set +@hash +@sortedset -@dangerous

Read-only user for monitoring
user monitor on >Mon1t0r_R3d1s_P@ss_2024! +@read +ping +info +client

Configure Redis replica node

Set up a replica node for high availability and load distribution.

# Network and security
bind 127.0.0.1 203.0.113.11
port 0
tls-port 6381
tls-cert-file /etc/redis/tls/redis-cert.pem
tls-key-file /etc/redis/tls/redis-key.pem
tls-ca-cert-file /etc/redis/tls/ca-cert.pem
tls-protocols "TLSv1.2 TLSv1.3"
tls-ciphersuites TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256
tls-ciphers ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256
protected-mode yes

Replication
replicaof 203.0.113.10 6380
masterauth Str0ng_R3d1s_P@ssw0rd_2024!
requirepass Str0ng_R3d1s_P@ssw0rd_2024!
aclfile /etc/redis/users.acl

General configuration
timeout 300
tcp-keepalive 300
daemonize yes
pidfile /var/run/redis/redis-replica.pid
loglevel notice
logfile /var/log/redis/redis-replica.log

Memory and persistence
maxmemory 2gb
maxmemory-policy allkeys-lru
replica-read-only yes
replica-serve-stale-data yes
dbfilename dump-replica.rdb
dir /var/lib/redis

Append Only File
appendonly yes
appendfilename "appendonly-replica.aof"
appendfsync everysec

Clustering
cluster-enabled yes
cluster-config-file nodes-replica.conf
cluster-node-timeout 15000
cluster-announce-hostname redis-replica.example.com
cluster-announce-port 6381
cluster-announce-tls-port 6381

Security hardening
disable-thp yes
rename-command FLUSHDB ""
rename-command FLUSHALL ""
rename-command DEBUG ""
rename-command CONFIG "CONFIG_8f3a9d2e1b7c6405"

Set file permissions and ownership

Apply correct ownership and minimal permissions to all Redis configuration files.

sudo chown redis:redis /etc/redis/redis-master.conf /etc/redis/redis-replica.conf /etc/redis/users.acl
sudo chmod 640 /etc/redis/redis-master.conf /etc/redis/redis-replica.conf
sudo chmod 600 /etc/redis/users.acl
sudo mkdir -p /var/run/redis
sudo chown redis:redis /var/run/redis
sudo chmod 755 /var/run/redis

Create systemd service files

Set up systemd services for both Redis master and replica nodes.

[Unit]
Description=Redis Master Server
After=network.target

[Service]
Type=forking
User=redis
Group=redis
ExecStart=/usr/bin/redis-server /etc/redis/redis-master.conf
ExecStop=/usr/bin/redis-cli --tls --cert /etc/redis/tls/redis-cert.pem --key /etc/redis/tls/redis-key.pem --cacert /etc/redis/tls/ca-cert.pem -p 6380 shutdown
TimeoutStopSec=0
Restart=always
RestartSec=5
RuntimeDirectory=redis
RuntimeDirectoryMode=0755

Security settings
NoNewPrivileges=yes
PrivateTmp=yes
PrivateDevices=yes
ProtectHome=yes
ProtectSystem=strict
ReadWritePaths=/var/lib/redis /var/log/redis /var/run/redis

[Install]
WantedBy=multi-user.target

Create Redis replica service

Create the systemd service file for the replica node.

[Unit]
Description=Redis Replica Server
After=network.target

[Service]
Type=forking
User=redis
Group=redis
ExecStart=/usr/bin/redis-server /etc/redis/redis-replica.conf
ExecStop=/usr/bin/redis-cli --tls --cert /etc/redis/tls/redis-cert.pem --key /etc/redis/tls/redis-key.pem --cacert /etc/redis/tls/ca-cert.pem -p 6381 shutdown
TimeoutStopSec=0
Restart=always
RestartSec=5
RuntimeDirectory=redis
RuntimeDirectoryMode=0755

Security settings
NoNewPrivileges=yes
PrivateTmp=yes
PrivateDevices=yes
ProtectHome=yes
ProtectSystem=strict
ReadWritePaths=/var/lib/redis /var/log/redis /var/run/redis

[Install]
WantedBy=multi-user.target

Configure system limits for Redis

Optimize system limits for Redis performance and memory management.

redis soft nofile 65535
redis hard nofile 65535
redis soft memlock unlimited
redis hard memlock unlimited

Configure kernel parameters

Set optimal kernel parameters for Redis performance and security.

# Memory overcommit for Redis
vm.overcommit_memory = 1

Disable transparent huge pages
vm.nr_hugepages = 0

TCP settings for Redis
net.core.somaxconn = 65535
net.ipv4.tcp_max_syn_backlog = 65535

Network security
net.ipv4.conf.all.rp_filter = 1
net.ipv4.conf.default.rp_filter = 1
net.ipv4.icmp_echo_ignore_broadcasts = 1
net.ipv4.icmp_ignore_bogus_error_responses = 1

Apply kernel parameters

Load the new kernel parameters and disable transparent huge pages.

sudo sysctl -p /etc/sysctl.d/redis.conf
echo never | sudo tee /sys/kernel/mm/transparent_hugepage/enabled
echo 'echo never > /sys/kernel/mm/transparent_hugepage/enabled' | sudo tee -a /etc/rc.local
sudo chmod +x /etc/rc.local

Configure firewall rules

Set up firewall rules to allow Redis cluster communication securely.

sudo ufw allow from 203.0.113.0/24 to any port 6380 proto tcp comment 'Redis master TLS'
sudo ufw allow from 203.0.113.0/24 to any port 6381 proto tcp comment 'Redis replica TLS'
sudo ufw allow from 203.0.113.0/24 to any port 16380 proto tcp comment 'Redis cluster bus'
sudo ufw reload

sudo firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="203.0.113.0/24" port protocol="tcp" port="6380" accept'
sudo firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="203.0.113.0/24" port protocol="tcp" port="6381" accept'
sudo firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="203.0.113.0/24" port protocol="tcp" port="16380" accept'
sudo firewall-cmd --reload

Start and enable Redis services

Start both Redis master and replica services and enable them for automatic startup.

sudo systemctl daemon-reload
sudo systemctl enable --now redis-master redis-replica
sudo systemctl status redis-master redis-replica

Configure Redis backup script

Create an automated backup script for Redis data with compression and rotation.

#!/bin/bash

Redis backup configuration
BACKUP_DIR="/var/backups/redis"
RETENTION_DAYS=7
DATE=$(date +%Y%m%d_%H%M%S)

Create backup directory
mkdir -p $BACKUP_DIR

Redis connection details
REDIS_CLI="/usr/bin/redis-cli --tls --cert /etc/redis/tls/redis-cert.pem --key /etc/redis/tls/redis-key.pem --cacert /etc/redis/tls/ca-cert.pem"

Backup master node
echo "Starting Redis backup at $(date)"
$REDIS_CLI -p 6380 -a "Str0ng_R3d1s_P@ssw0rd_2024!" --no-auth-warning BGSAVE

Wait for background save to complete
while [ $($REDIS_CLI -p 6380 -a "Str0ng_R3d1s_P@ssw0rd_2024!" --no-auth-warning LASTSAVE) -eq $($REDIS_CLI -p 6380 -a "Str0ng_R3d1s_P@ssw0rd_2024!" --no-auth-warning LASTSAVE) ]; do
    sleep 1
done

Copy and compress backup files
cp /var/lib/redis/dump-master.rdb $BACKUP_DIR/redis-master-$DATE.rdb
cp /var/lib/redis/appendonly-master.aof $BACKUP_DIR/redis-master-$DATE.aof
gzip $BACKUP_DIR/redis-master-$DATE.rdb
gzip $BACKUP_DIR/redis-master-$DATE.aof

Remove old backups
find $BACKUP_DIR -name "redis-master-*.gz" -mtime +$RETENTION_DAYS -delete

echo "Redis backup completed at $(date)"

Set backup script permissions and schedule

Make the backup script executable and schedule it to run daily via cron.

sudo chmod 750 /etc/redis/backup.sh
sudo chown redis:redis /etc/redis/backup.sh
sudo mkdir -p /var/backups/redis
sudo chown redis:redis /var/backups/redis
sudo chmod 755 /var/backups/redis
echo '0 2   * redis /etc/redis/backup.sh >> /var/log/redis/backup.log 2>&1' | sudo tee -a /etc/crontab

Configure Redis monitoring

Set up Redis monitoring script to check cluster health and performance metrics.

#!/bin/bash

Redis monitoring script
REDIS_CLI="/usr/bin/redis-cli --tls --cert /etc/redis/tls/redis-cert.pem --key /etc/redis/tls/redis-key.pem --cacert /etc/redis/tls/ca-cert.pem"
LOG_FILE="/var/log/redis/monitor.log"
DATE=$(date '+%Y-%m-%d %H:%M:%S')

Function to log messages
log_message() {
    echo "[$DATE] $1" >> $LOG_FILE
}

Check Redis master status
if $REDIS_CLI -p 6380 -a "Str0ng_R3d1s_P@ssw0rd_2024!" --no-auth-warning ping > /dev/null 2>&1; then
    log_message "Redis master is running"
else
    log_message "ERROR: Redis master is not responding"
fi

Check Redis replica status
if $REDIS_CLI -p 6381 -a "Str0ng_R3d1s_P@ssw0rd_2024!" --no-auth-warning ping > /dev/null 2>&1; then
    log_message "Redis replica is running"
else
    log_message "ERROR: Redis replica is not responding"
fi

Check memory usage
MEM_USED=$($REDIS_CLI -p 6380 -a "Str0ng_R3d1s_P@ssw0rd_2024!" --no-auth-warning info memory | grep used_memory_human | cut -d: -f2 | tr -d '\r')
log_message "Memory usage: $MEM_USED"

Check connected clients
CLIENTS=$($REDIS_CLI -p 6380 -a "Str0ng_R3d1s_P@ssw0rd_2024!" --no-auth-warning info clients | grep connected_clients | cut -d: -f2 | tr -d '\r')
log_message "Connected clients: $CLIENTS"

Enable monitoring script

Make the monitoring script executable and schedule it to run every 5 minutes.

sudo chmod 750 /etc/redis/monitor.sh
sudo chown redis:redis /etc/redis/monitor.sh
echo '/5    * redis /etc/redis/monitor.sh' | sudo tee -a /etc/crontab

Verify your setup

Test the Redis installation, clustering, SSL connection, and authentication.

# Check Redis services status
sudo systemctl status redis-master redis-replica

Test SSL connection to master
redis-cli --tls --cert /etc/redis/tls/redis-cert.pem --key /etc/redis/tls/redis-key.pem --cacert /etc/redis/tls/ca-cert.pem -p 6380 -a "Str0ng_R3d1s_P@ssw0rd_2024!" --no-auth-warning ping

Test SSL connection to replica
redis-cli --tls --cert /etc/redis/tls/redis-cert.pem --key /etc/redis/tls/redis-key.pem --cacert /etc/redis/tls/ca-cert.pem -p 6381 -a "Str0ng_R3d1s_P@ssw0rd_2024!" --no-auth-warning ping

Check cluster status
redis-cli --tls --cert /etc/redis/tls/redis-cert.pem --key /etc/redis/tls/redis-key.pem --cacert /etc/redis/tls/ca-cert.pem -p 6380 -a "Str0ng_R3d1s_P@ssw0rd_2024!" --no-auth-warning cluster nodes

Test ACL authentication
redis-cli --tls --cert /etc/redis/tls/redis-cert.pem --key /etc/redis/tls/redis-key.pem --cacert /etc/redis/tls/ca-cert.pem -p 6380 --user app_user --pass "App_R3d1s_P@ss_2024!" set test:key "test value"

Verify replication
redis-cli --tls --cert /etc/redis/tls/redis-cert.pem --key /etc/redis/tls/redis-key.pem --cacert /etc/redis/tls/ca-cert.pem -p 6381 -a "Str0ng_R3d1s_P@ssw0rd_2024!" --no-auth-warning get test:key

Check Redis version and info
redis-cli --tls --cert /etc/redis/tls/redis-cert.pem --key /etc/redis/tls/redis-key.pem --cacert /etc/redis/tls/ca-cert.pem -p 6380 -a "Str0ng_R3d1s_P@ssw0rd_2024!" --no-auth-warning info server

Common issues

Symptom	Cause	Fix
Redis won't start	Configuration syntax error	`sudo journalctl -u redis-master -f` to check logs
SSL connection fails	Certificate permissions or path issues	Check `sudo ls -la /etc/redis/tls/` and verify ownership
ACL authentication rejected	User permissions or password mismatch	`redis-cli ACL LIST` to verify user configuration
Replication not working	Network connectivity or authentication	Check replica logs: `sudo tail -f /var/log/redis/redis-replica.log`
High memory usage	No maxmemory policy set	Verify maxmemory settings in configuration
Cluster nodes can't communicate	Firewall blocking cluster bus port	Ensure port 16380 is open between cluster nodes
Permission denied errors	Incorrect file ownership	`sudo chown -R redis:redis /var/lib/redis /var/log/redis`

Next steps

Install and configure Grafana with Prometheus for system monitoring to monitor Redis metrics
Install and configure NGINX with HTTP/3 and modern security headers for Redis proxy setup
Configure Redis Sentinel for automatic failover
Set up Redis Cluster with multiple master nodes
Configure Redis Lua scripting and modules

Automated install script

Run this to automate the entire setup

install.sh

#!/usr/bin/env bash
set -euo pipefail

# Redis 7 Cluster Installation Script with Security Hardening
# Production-ready installation for Ubuntu, Debian, AlmaLinux, Rocky Linux

# Colors for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m'

# Configuration variables
REDIS_PASSWORD="${REDIS_PASSWORD:-$(openssl rand -base64 32)}"
CLUSTER_IP="${1:-$(hostname -I | awk '{print $1}')}"
REDIS_USER="redis"
REDIS_HOME="/var/lib/redis"
REDIS_CONFIG_DIR="/etc/redis"
REDIS_LOG_DIR="/var/log/redis"
REDIS_TLS_DIR="/etc/redis/tls"

# Print colored output
log_info() { echo -e "${GREEN}[INFO]${NC} $1"; }
log_warn() { echo -e "${YELLOW}[WARN]${NC} $1"; }
log_error() { echo -e "${RED}[ERROR]${NC} $1"; }

# Show usage
usage() {
    echo "Usage: $0 [cluster_ip]"
    echo "Example: $0 192.168.1.100"
    exit 1
}

# Cleanup on error
cleanup() {
    log_error "Installation failed. Cleaning up..."
    systemctl stop redis-server 2>/dev/null || true
    systemctl disable redis-server 2>/dev/null || true
    rm -rf /etc/redis /var/lib/redis /var/log/redis 2>/dev/null || true
    userdel redis 2>/dev/null || true
}
trap cleanup ERR

# Check prerequisites
check_prerequisites() {
    if [[ $EUID -ne 0 ]]; then
        log_error "This script must be run as root"
        exit 1
    fi
    
    if [[ ! "$CLUSTER_IP" =~ ^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$ ]]; then
        log_error "Invalid IP address format"
        usage
    fi
}

# Detect distribution
detect_distro() {
    if [[ ! -f /etc/os-release ]]; then
        log_error "Cannot detect distribution"
        exit 1
    fi
    
    . /etc/os-release
    case "$ID" in
        ubuntu|debian)
            PKG_MGR="apt"
            PKG_UPDATE="apt update && apt upgrade -y"
            PKG_INSTALL="apt install -y"
            FIREWALL_CMD="ufw"
            ;;
        almalinux|rocky|centos|rhel|ol|fedora)
            PKG_MGR="dnf"
            PKG_UPDATE="dnf update -y"
            PKG_INSTALL="dnf install -y"
            FIREWALL_CMD="firewall-cmd"
            ;;
        amzn)
            PKG_MGR="yum"
            PKG_UPDATE="yum update -y"
            PKG_INSTALL="yum install -y"
            FIREWALL_CMD="firewall-cmd"
            ;;
        *)
            log_error "Unsupported distribution: $ID"
            exit 1
            ;;
    esac
    log_info "Detected distribution: $ID"
}

# Update system packages
update_system() {
    log_info "[1/8] Updating system packages..."
    eval $PKG_UPDATE
}

# Install Redis 7
install_redis() {
    log_info "[2/8] Installing Redis 7..."
    
    if [[ "$PKG_MGR" == "apt" ]]; then
        curl -fsSL https://packages.redis.io/gpg | gpg --dearmor -o /usr/share/keyrings/redis-archive-keyring.gpg
        echo "deb [signed-by=/usr/share/keyrings/redis-archive-keyring.gpg] https://packages.redis.io/deb $(lsb_release -cs) main" > /etc/apt/sources.list.d/redis.list
        apt update
        $PKG_INSTALL redis-server redis-tools
    else
        $PKG_INSTALL https://packages.redis.io/rpm/el9/x86_64/redis-7.2.4-1.el9.x86_64.rpm
    fi
    
    systemctl stop redis-server || systemctl stop redis || true
    systemctl disable redis-server || systemctl disable redis || true
}

# Create Redis user and directories
setup_directories() {
    log_info "[3/8] Creating Redis user and directories..."
    
    id $REDIS_USER &>/dev/null || useradd --system --home $REDIS_HOME --shell /bin/false $REDIS_USER
    
    mkdir -p $REDIS_CONFIG_DIR $REDIS_HOME $REDIS_LOG_DIR $REDIS_TLS_DIR /var/run/redis
    chown $REDIS_USER:$REDIS_USER $REDIS_HOME $REDIS_LOG_DIR /var/run/redis
    chown -R $REDIS_USER:$REDIS_USER $REDIS_CONFIG_DIR
    chmod 755 $REDIS_HOME $REDIS_LOG_DIR
    chmod 750 $REDIS_CONFIG_DIR
    chmod 755 /var/run/redis
}

# Generate SSL certificates
generate_ssl() {
    log_info "[4/8] Generating SSL certificates..."
    
    cd $REDIS_TLS_DIR
    openssl genrsa -out ca-key.pem 4096
    openssl req -x509 -new -nodes -key ca-key.pem -sha256 -days 3650 -out ca-cert.pem -subj "/C=US/ST=State/L=City/O=Organization/CN=Redis-CA"
    openssl genrsa -out redis-key.pem 2048
    openssl req -new -key redis-key.pem -out redis.csr -subj "/C=US/ST=State/L=City/O=Organization/CN=redis-server"
    openssl x509 -req -in redis.csr -CA ca-cert.pem -CAkey ca-key.pem -CAcreateserial -out redis-cert.pem -days 365 -sha256
    
    chown -R $REDIS_USER:$REDIS_USER $REDIS_TLS_DIR
    chmod 600 $REDIS_TLS_DIR/*.pem
    rm -f redis.csr
}

# Configure Redis
configure_redis() {
    log_info "[5/8] Configuring Redis with clustering and security..."
    
    cat > $REDIS_CONFIG_DIR/redis.conf << EOF
# Network and security
bind 127.0.0.1 $CLUSTER_IP
port 0
tls-port 6380
tls-cert-file $REDIS_TLS_DIR/redis-cert.pem
tls-key-file $REDIS_TLS_DIR/redis-key.pem
tls-ca-cert-file $REDIS_TLS_DIR/ca-cert.pem
tls-protocols "TLSv1.2 TLSv1.3"
tls-ciphersuites TLS_AES_256_GCM_SHA384:TLS_CHACHA20_POLY1305_SHA256
tls-ciphers ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256
protected-mode yes

# Authentication
requirepass $REDIS_PASSWORD
aclfile $REDIS_CONFIG_DIR/users.acl

# General configuration
timeout 300
tcp-keepalive 300
daemonize yes
pidfile /var/run/redis/redis-master.pid
loglevel notice
logfile $REDIS_LOG_DIR/redis-master.log

# Memory and persistence
maxmemory 2gb
maxmemory-policy allkeys-lru
save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dump-master.rdb
dir $REDIS_HOME

# Append Only File
appendonly yes
appendfilename "appendonly-master.aof"
appendfsync everysec
no-appendfsync-on-rewrite no
auto-aof-rewrite-percentage 100
auto-aof-rewrite-min-size 64mb

# Clustering
cluster-enabled yes
cluster-config-file nodes-master.conf
cluster-node-timeout 15000
cluster-announce-ip $CLUSTER_IP
cluster-announce-port 6380
cluster-announce-tls-port 6380

# Security hardening
rename-command FLUSHDB ""
rename-command FLUSHALL ""
rename-command DEBUG ""
rename-command SHUTDOWN REDIS_SHUTDOWN_$(openssl rand -hex 8)
EOF

    # Create ACL file
    cat > $REDIS_CONFIG_DIR/users.acl << EOF
user default off
user admin on >$REDIS_PASSWORD ~* &* +@all
user readonly on >$(openssl rand -base64 16) ~* +@read
EOF

    chown $REDIS_USER:$REDIS_USER $REDIS_CONFIG_DIR/redis.conf $REDIS_CONFIG_DIR/users.acl
    chmod 640 $REDIS_CONFIG_DIR/redis.conf $REDIS_CONFIG_DIR/users.acl
}

# Create systemd service
setup_service() {
    log_info "[6/8] Setting up Redis service..."
    
    cat > /etc/systemd/system/redis-cluster.service << EOF
[Unit]
Description=Redis In-Memory Data Store (Cluster)
After=network.target

[Service]
User=$REDIS_USER
Group=$REDIS_USER
ExecStart=/usr/bin/redis-server $REDIS_CONFIG_DIR/redis.conf
ExecStop=/usr/bin/redis-cli --tls --cert $REDIS_TLS_DIR/redis-cert.pem --key $REDIS_TLS_DIR/redis-key.pem --cacert $REDIS_TLS_DIR/ca-cert.pem -a $REDIS_PASSWORD shutdown
TimeoutStopSec=0
Restart=always
RestartSec=5

[Install]
WantedBy=multi-user.target
EOF

    systemctl daemon-reload
    systemctl enable redis-cluster
}

# Configure firewall
configure_firewall() {
    log_info "[7/8] Configuring firewall..."
    
    if [[ "$FIREWALL_CMD" == "ufw" ]]; then
        ufw --force enable 2>/dev/null || true
        ufw allow 6380/tcp comment "Redis TLS"
    else
        systemctl start firewalld 2>/dev/null || true
        firewall-cmd --permanent --add-port=6380/tcp 2>/dev/null || true
        firewall-cmd --reload 2>/dev/null || true
    fi
}

# Start and verify Redis
start_and_verify() {
    log_info "[8/8] Starting Redis and verifying installation..."
    
    systemctl start redis-cluster
    sleep 3
    
    if systemctl is-active --quiet redis-cluster; then
        log_info "Redis cluster is running successfully"
        log_info "Configuration file: $REDIS_CONFIG_DIR/redis.conf"
        log_info "Log file: $REDIS_LOG_DIR/redis-master.log"
        log_info "TLS enabled on port 6380"
        log_warn "IMPORTANT: Redis password: $REDIS_PASSWORD"
        log_warn "Save this password securely!"
    else
        log_error "Redis failed to start. Check logs: journalctl -u redis-cluster"
        exit 1
    fi
}

# Main execution
main() {
    check_prerequisites
    detect_distro
    update_system
    install_redis
    setup_directories
    generate_ssl
    configure_redis
    setup_service
    configure_firewall
    start_and_verify
    
    log_info "Redis 7 cluster installation completed successfully!"
}

main "$@"

Review the script before running. Execute with: bash install.sh

#redis #redis-cluster #redis-security #ssl-tls #acl-authentication #database-clustering #redis-backup #redis-monitoring

Install and configure Redis 7 with clustering and security hardening

Prerequisites

What this solves

Step-by-step installation

Update system packages

Install Redis 7 from official repository

Create Redis user and directories

Generate SSL certificates for Redis

Configure Redis master node

Authentication and ACL

General configuration

Memory and persistence

Append Only File

Clustering

Security hardening

Configure Redis ACL users

Admin user with full access

Application user with limited permissions

Read-only user for monitoring

Configure Redis replica node

Replication

General configuration

Memory and persistence

Append Only File

Clustering

Security hardening

Set file permissions and ownership

Create systemd service files

Security settings

Create Redis replica service

Security settings

Configure system limits for Redis

Configure kernel parameters

Disable transparent huge pages

TCP settings for Redis

Network security

Apply kernel parameters

Configure firewall rules

Start and enable Redis services

Configure Redis backup script

Redis backup configuration

Create backup directory

Redis connection details

Backup master node

Wait for background save to complete

Copy and compress backup files

Remove old backups

Set backup script permissions and schedule

Configure Redis monitoring

Redis monitoring script

Function to log messages

Check Redis master status

Check Redis replica status

Check memory usage

Check connected clients

Enable monitoring script

Verify your setup

Test SSL connection to master

Test SSL connection to replica

Check cluster status

Test ACL authentication

Verify replication

Check Redis version and info

Common issues

Next steps

Related tutorials

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Don't want to manage this yourself?