alpine support on the agent installation script

agents/patchmon_install.sh

@@ -1,7 +1,32 @@
-#!/bin/bash
+#!/bin/sh
+# PatchMon Agent Installation Script
+# This script requires bash for full functionality
+# Usage: curl -s {PATCHMON_URL}/api/v1/hosts/install -H "X-API-ID: {API_ID}" -H "X-API-KEY: {API_KEY}" | sh
+
+# Check if bash is available, if not try to install it (for Alpine Linux)
+if ! command -v bash >/dev/null 2>&1; then
+    if command -v apk >/dev/null 2>&1; then
+        echo "Installing bash for script compatibility..."
+        apk add --no-cache bash >/dev/null 2>&1 || true
+    fi
+fi
+
+# If bash is available and we're not already running in bash, switch to bash
+# When piped, we can't re-execute easily, so we'll continue with sh
+# but ensure bash is available for bash-specific features
+if command -v bash >/dev/null 2>&1 && [ -z "${BASH_VERSION:-}" ]; then
+    # Check if we're being piped (stdin is not a terminal)
+    if [ -t 0 ]; then
+        # Direct execution, re-execute with bash
+        exec bash "$0" "$@"
+        exit $?
+    fi
+    # When piped, we continue with sh but bash is now available
+    # The script will use bash-specific features which should work if bash is installed
+fi
 
 # PatchMon Agent Installation Script
-# Usage: curl -s {PATCHMON_URL}/api/v1/hosts/install -H "X-API-ID: {API_ID}" -H "X-API-KEY: {API_KEY}" | bash
+# Usage: curl -s {PATCHMON_URL}/api/v1/hosts/install -H "X-API-ID: {API_ID}" -H "X-API-KEY: {API_KEY}" | sh
 
 set -e
 
@@ -36,7 +61,7 @@ warning() {
 }
 
 # Check if running as root
-if [[ $EUID -ne 0 ]]; then
+if [ "$(id -u)" -ne 0 ]; then
    error "This script must be run as root (use sudo)"
 fi
 
@@ -45,8 +70,8 @@ verify_datetime() {
     info "🕐 Verifying system datetime and timezone..."
     
     # Get current system time
-    local system_time=$(date)
-    local timezone=$(timedatectl show --property=Timezone --value 2>/dev/null || echo "Unknown")
+    system_time=$(date)
+    timezone=$(timedatectl show --property=Timezone --value 2>/dev/null || echo "Unknown")
     
     # Display current datetime info
     echo ""
@@ -56,14 +81,17 @@ verify_datetime() {
     echo ""
     
     # Check if we can read from stdin (interactive terminal)
-    if [[ -t 0 ]]; then
+    if [ -t 0 ]; then
         # Interactive terminal - ask user
-        read -p "Does this date/time look correct to you? (y/N): " -r response
-        if [[ "$response" =~ ^[Yy]$ ]]; then
+        printf "Does this date/time look correct to you? (y/N): "
+        read -r response
+        case "$response" in
+            [Yy]*) 
                 success "✅ Date/time verification passed"
                 echo ""
                 return 0
-        else
+                ;;
+            *)
             echo ""
             echo -e "${RED}❌ Date/time verification failed${NC}"
             echo ""
@@ -74,7 +102,8 @@ verify_datetime() {
             echo ""
                 echo -e "${BLUE}ℹ️  After fixing the date/time, re-run this installation script.${NC}"
                 error "Installation cancelled - please fix date/time and re-run"
-        fi
+                ;;
+        esac
     else
         # Non-interactive (piped from curl) - show warning and continue
         echo -e "${YELLOW}⚠️  Non-interactive installation detected${NC}"
@@ -121,9 +150,9 @@ cleanup_old_files
 # Generate or retrieve machine ID
 get_machine_id() {
     # Try multiple sources for machine ID
-    if [[ -f /etc/machine-id ]]; then
+    if [ -f /etc/machine-id ]; then
         cat /etc/machine-id
-    elif [[ -f /var/lib/dbus/machine-id ]]; then
+    elif [ -f /var/lib/dbus/machine-id ]; then
         cat /var/lib/dbus/machine-id
     else
         # Fallback: generate from hardware info (less ideal but works)
@@ -132,12 +161,12 @@ get_machine_id() {
 }
 
 # Parse arguments from environment (passed via HTTP headers)
-if [[ -z "$PATCHMON_URL" ]] || [[ -z "$API_ID" ]] || [[ -z "$API_KEY" ]]; then
+if [ -z "$PATCHMON_URL" ] || [ -z "$API_ID" ] || [ -z "$API_KEY" ]; then
     error "Missing required parameters. This script should be called via the PatchMon web interface."
 fi
 
 # Auto-detect architecture if not explicitly set
-if [[ -z "$ARCHITECTURE" ]]; then
+if [ -z "$ARCHITECTURE" ]; then
     arch_raw=$(uname -m 2>/dev/null || echo "unknown")
     
     # Map architecture to supported values
@@ -162,13 +191,16 @@ if [[ -z "$ARCHITECTURE" ]]; then
 fi
 
 # Validate architecture
-if [[ "$ARCHITECTURE" != "amd64" && "$ARCHITECTURE" != "386" && "$ARCHITECTURE" != "arm64" && "$ARCHITECTURE" != "arm" ]]; then
+if [ "$ARCHITECTURE" != "amd64" ] && [ "$ARCHITECTURE" != "386" ] && [ "$ARCHITECTURE" != "arm64" ] && [ "$ARCHITECTURE" != "arm" ]; then
     error "Invalid architecture '$ARCHITECTURE'. Must be one of: amd64, 386, arm64, arm"
 fi
 
 # Check if --force flag is set (for bypassing broken packages)
 FORCE_INSTALL="${FORCE_INSTALL:-false}"
-if [[ "$*" == *"--force"* ]] || [[ "$FORCE_INSTALL" == "true" ]]; then
+case "$*" in
+    *"--force"*) FORCE_INSTALL="true" ;;
+esac
+if [ "$FORCE_INSTALL" = "true" ]; then
     FORCE_INSTALL="true"
     warning "⚠️  Force mode enabled - will bypass broken packages"
 fi
@@ -224,7 +256,7 @@ install_apt_packages() {
     # Build apt-get command based on force mode
     local apt_cmd="apt-get install ${missing_packages[*]} -y"
     
-    if [[ "$FORCE_INSTALL" == "true" ]]; then
+    if [ "$FORCE_INSTALL" = "true" ]; then
         info "Using force mode - bypassing broken packages..."
         apt_cmd="$apt_cmd -o APT::Get::Fix-Broken=false -o DPkg::Options::=\"--force-confold\" -o DPkg::Options::=\"--force-confdef\""
     fi
@@ -240,7 +272,7 @@ install_apt_packages() {
         local all_ok=true
         for pkg in "${packages[@]}"; do
             if ! command_exists "$pkg"; then
-                if [[ "$FORCE_INSTALL" == "true" ]]; then
+                if [ "$FORCE_INSTALL" = "true" ]; then
                     error "Critical dependency '$pkg' is not available even with --force. Please install manually."
                 else
                     error "Critical dependency '$pkg' is not available. Try again with --force flag or install manually: apt-get install $pkg"
@@ -279,7 +311,7 @@ install_yum_dnf_packages() {
     
     info "Need to install: ${missing_packages[*]}"
     
-    if [[ "$pkg_manager" == "yum" ]]; then
+    if [ "$pkg_manager" = "yum" ]; then
         yum install -y "${missing_packages[@]}"
     else
         dnf install -y "${missing_packages[@]}"
@@ -365,7 +397,7 @@ install_apk_packages() {
         local all_ok=true
         for pkg in "${packages[@]}"; do
             if ! command_exists "$pkg"; then
-                if [[ "$FORCE_INSTALL" == "true" ]]; then
+                if [ "$FORCE_INSTALL" = "true" ]; then
                     error "Critical dependency '$pkg' is not available even with --force. Please install manually."
                 else
                     error "Critical dependency '$pkg' is not available. Try again with --force flag or install manually: apk add $pkg"
@@ -391,7 +423,7 @@ if command -v apt-get >/dev/null 2>&1; then
     
     # Check for broken packages
     if dpkg -l | grep -q "^iH\|^iF" 2>/dev/null; then
-        if [[ "$FORCE_INSTALL" == "true" ]]; then
+        if [ "$FORCE_INSTALL" = "true" ]; then
             warning "Detected broken packages on system - force mode will work around them"
         else
             warning "⚠️  Broken packages detected on system"
@@ -446,7 +478,7 @@ echo ""
 info "📁 Setting up configuration directory..."
 
 # Check if configuration directory already exists
-if [[ -d "/etc/patchmon" ]]; then
+if [ -d "/etc/patchmon" ]; then
     warning "⚠️  Configuration directory already exists at /etc/patchmon"
     warning "⚠️  Preserving existing configuration files"
     
@@ -463,8 +495,8 @@ fi
 # Check if agent is already configured and working (before we overwrite anything)
 info "🔍 Checking if agent is already configured..."
 
-if [[ -f /etc/patchmon/config.yml ]] && [[ -f /etc/patchmon/credentials.yml ]]; then
-    if [[ -f /usr/local/bin/patchmon-agent ]]; then
+if [ -f /etc/patchmon/config.yml ] && [ -f /etc/patchmon/credentials.yml ]; then
+    if [ -f /usr/local/bin/patchmon-agent ]; then
         info "📋 Found existing agent configuration"
         info "🧪 Testing existing configuration with ping..."
         
@@ -495,7 +527,7 @@ fi
 info "🔐 Creating configuration files..."
 
 # Check if config file already exists
-if [[ -f "/etc/patchmon/config.yml" ]]; then
+if [ -f "/etc/patchmon/config.yml" ]; then
     warning "⚠️  Config file already exists at /etc/patchmon/config.yml"
     warning "⚠️  Moving existing file out of the way for fresh installation"
     
@@ -508,7 +540,7 @@ if [[ -f "/etc/patchmon/config.yml" ]]; then
 fi
 
 # Check if credentials file already exists
-if [[ -f "/etc/patchmon/credentials.yml" ]]; then
+if [ -f "/etc/patchmon/credentials.yml" ]; then
     warning "⚠️  Credentials file already exists at /etc/patchmon/credentials.yml"
     warning "⚠️  Moving existing file out of the way for fresh installation"
     
@@ -521,7 +553,7 @@ if [[ -f "/etc/patchmon/credentials.yml" ]]; then
 fi
 
 # Clean up old credentials file if it exists (from previous installations)
-if [[ -f "/etc/patchmon/credentials" ]]; then
+if [ -f "/etc/patchmon/credentials" ]; then
     warning "⚠️  Found old credentials file, removing it..."
     rm -f /etc/patchmon/credentials
     info "📋 Removed old credentials file"
@@ -557,7 +589,7 @@ info "📥 Downloading PatchMon agent binary..."
 BINARY_NAME="patchmon-agent-linux-${ARCHITECTURE}"
 
 # Check if agent binary already exists
-if [[ -f "/usr/local/bin/patchmon-agent" ]]; then
+if [ -f "/usr/local/bin/patchmon-agent" ]; then
     warning "⚠️  Agent binary already exists at /usr/local/bin/patchmon-agent"
     warning "⚠️  Moving existing file out of the way for fresh installation"
     
@@ -570,7 +602,7 @@ if [[ -f "/usr/local/bin/patchmon-agent" ]]; then
 fi
 
 # Clean up old shell script if it exists (from previous installations)
-if [[ -f "/usr/local/bin/patchmon-agent.sh" ]]; then
+if [ -f "/usr/local/bin/patchmon-agent.sh" ]; then
     warning "⚠️  Found old shell script agent, removing it..."
     rm -f /usr/local/bin/patchmon-agent.sh
     info "📋 Removed old shell script agent"
@@ -596,7 +628,7 @@ info "📁 Setting up log directory..."
 mkdir -p /etc/patchmon/logs
 
 # Handle existing log files
-if [[ -f "/etc/patchmon/logs/patchmon-agent.log" ]]; then
+if [ -f "/etc/patchmon/logs/patchmon-agent.log" ]; then
     warning "⚠️  Existing log file found at /etc/patchmon/logs/patchmon-agent.log"
     warning "⚠️  Rotating log file for fresh start"
     
@@ -613,8 +645,11 @@ else
     error "❌ Failed to validate API credentials or reach server"
 fi
 
-# Step 5: Setup systemd service for WebSocket connection
+# Step 5: Setup service for WebSocket connection
 # Note: The service will automatically send an initial report on startup (see serve.go)
+# Detect init system and create appropriate service
+if command -v systemctl >/dev/null 2>&1; then
+    # Systemd is available
     info "🔧 Setting up systemd service..."
     
     # Stop and disable existing service if it exists
@@ -672,6 +707,86 @@ else
         warning "⚠️  Service may have failed to start. Check status with: systemctl status patchmon-agent"
     fi
     
+    SERVICE_TYPE="systemd"
+elif [ -d /etc/init.d ] && command -v rc-service >/dev/null 2>&1; then
+    # OpenRC is available (Alpine Linux)
+    info "🔧 Setting up OpenRC service..."
+    
+    # Stop and disable existing service if it exists
+    if rc-service patchmon-agent status >/dev/null 2>&1; then
+        warning "⚠️  Stopping existing PatchMon agent service..."
+        rc-service patchmon-agent stop
+    fi
+    
+    if rc-update show default 2>/dev/null | grep -q "patchmon-agent"; then
+        warning "⚠️  Disabling existing PatchMon agent service..."
+        rc-update del patchmon-agent default
+    fi
+    
+    # Create OpenRC service file
+    cat > /etc/init.d/patchmon-agent << 'EOF'
+#!/sbin/openrc-run
+
+name="patchmon-agent"
+description="PatchMon Agent Service"
+command="/usr/local/bin/patchmon-agent"
+command_args="serve"
+command_user="root"
+pidfile="/var/run/patchmon-agent.pid"
+command_background="yes"
+working_dir="/etc/patchmon"
+
+depend() {
+    need net
+    after net
+}
+EOF
+    
+    chmod +x /etc/init.d/patchmon-agent
+    
+    # Clean up old crontab entries if they exist (from previous installations)
+    if crontab -l 2>/dev/null | grep -q "patchmon-agent"; then
+        warning "⚠️  Found old crontab entries, removing them..."
+        crontab -l 2>/dev/null | grep -v "patchmon-agent" | crontab -
+        info "📋 Removed old crontab entries"
+    fi
+    
+    # Enable and start the service
+    rc-update add patchmon-agent default
+    rc-service patchmon-agent start
+    
+    # Check if service started successfully
+    if rc-service patchmon-agent status >/dev/null 2>&1; then
+        success "✅ PatchMon Agent service started successfully"
+        info "🔗 WebSocket connection established"
+    else
+        warning "⚠️  Service may have failed to start. Check status with: rc-service patchmon-agent status"
+    fi
+    
+    SERVICE_TYPE="openrc"
+else
+    # No init system detected, use crontab as fallback
+    warning "⚠️  No init system detected (systemd or OpenRC). Using crontab for service management."
+    
+    # Clean up old crontab entries if they exist
+    if crontab -l 2>/dev/null | grep -q "patchmon-agent"; then
+        warning "⚠️  Found old crontab entries, removing them..."
+        crontab -l 2>/dev/null | grep -v "patchmon-agent" | crontab -
+        info "📋 Removed old crontab entries"
+    fi
+    
+    # Add crontab entry to run the agent
+    (crontab -l 2>/dev/null; echo "@reboot /usr/local/bin/patchmon-agent serve >/dev/null 2>&1") | crontab -
+    info "📋 Added crontab entry for PatchMon agent"
+    
+    # Start the agent manually
+    /usr/local/bin/patchmon-agent serve >/dev/null 2>&1 &
+    success "✅ PatchMon Agent started in background"
+    info "🔗 WebSocket connection established"
+    
+    SERVICE_TYPE="crontab"
+fi
+
 # Installation complete
 success "🎉 PatchMon Agent installation completed successfully!"
 echo ""
@@ -680,14 +795,20 @@ echo "   • Configuration directory: /etc/patchmon"
 echo "   • Agent binary installed: /usr/local/bin/patchmon-agent"
 echo "   • Architecture: $ARCHITECTURE"
 echo "   • Dependencies installed: jq, curl, bc"
+if [ "$SERVICE_TYPE" = "systemd" ]; then
     echo "   • Systemd service configured and running"
+elif [ "$SERVICE_TYPE" = "openrc" ]; then
+    echo "   • OpenRC service configured and running"
+else
+    echo "   • Service configured via crontab"
+fi
 echo "   • API credentials configured and tested"
 echo "   • WebSocket connection established"
 echo "   • Logs directory: /etc/patchmon/logs"
 
 # Check for moved files and show them
 MOVED_FILES=$(ls /etc/patchmon/credentials.yml.backup.* /etc/patchmon/config.yml.backup.* /usr/local/bin/patchmon-agent.backup.* /etc/patchmon/logs/patchmon-agent.log.old.* /usr/local/bin/patchmon-agent.sh.backup.* /etc/patchmon/credentials.backup.* 2>/dev/null || true)
-if [[ -n "$MOVED_FILES" ]]; then
+if [ -n "$MOVED_FILES" ]; then
     echo ""
     echo -e "${YELLOW}📋 Files Moved for Fresh Installation:${NC}"
     echo "$MOVED_FILES" | while read -r moved_file; do
@@ -702,8 +823,17 @@ echo -e "${BLUE}🔧 Management Commands:${NC}"
 echo "   • Test connection: /usr/local/bin/patchmon-agent ping"
 echo "   • Manual report: /usr/local/bin/patchmon-agent report"
 echo "   • Check status: /usr/local/bin/patchmon-agent diagnostics"
+if [ "$SERVICE_TYPE" = "systemd" ]; then
     echo "   • Service status: systemctl status patchmon-agent"
     echo "   • Service logs: journalctl -u patchmon-agent -f"
     echo "   • Restart service: systemctl restart patchmon-agent"
+elif [ "$SERVICE_TYPE" = "openrc" ]; then
+    echo "   • Service status: rc-service patchmon-agent status"
+    echo "   • Service logs: tail -f /etc/patchmon/logs/patchmon-agent.log"
+    echo "   • Restart service: rc-service patchmon-agent restart"
+else
+    echo "   • Service logs: tail -f /etc/patchmon/logs/patchmon-agent.log"
+    echo "   • Restart service: pkill -f 'patchmon-agent serve' && /usr/local/bin/patchmon-agent serve &"
+fi
 echo ""
 success "✅ Your system is now being monitored by PatchMon!"