Microservices in TuskLang - Bash Guide

🔧 Revolutionary Microservices Configuration

Microservices in TuskLang transforms your configuration files into intelligent, distributed service systems. No more monolithic applications or rigid service boundaries—everything lives in your TuskLang configuration with dynamic service discovery, intelligent communication, and comprehensive service orchestration.

> "We don't bow to any king" – TuskLang microservices break free from traditional service architecture constraints and bring modern distributed computing to your Bash applications.

🚀 Core Microservices Directives

Basic Microservices Setup

#microservices: enabled                 # Enable microservices
#ms-enabled: true                      # Alternative syntax
#ms-discovery: true                    # Enable service discovery
#ms-communication: true                # Enable inter-service communication
#ms-load-balancing: true               # Enable load balancing
#ms-circuit-breaker: true              # Enable circuit breaker

Advanced Microservices Configuration

#ms-orchestration: true                # Enable service orchestration
#ms-monitoring: true                   # Enable service monitoring
#ms-tracing: true                      # Enable distributed tracing
#ms-resilience: true                   # Enable resilience patterns
#ms-scalability: true                  # Enable auto-scaling
#ms-security: true                     # Enable service security

🔧 Bash Microservices Implementation

Basic Microservices Manager

#!/bin/bash
Load microservices configuration
source <(tsk load microservices.tsk)
Microservices configuration
MS_ENABLED="${ms_enabled:-true}"
MS_DISCOVERY="${ms_discovery:-true}"
MS_COMMUNICATION="${ms_communication:-true}"
MS_LOAD_BALANCING="${ms_load_balancing:-true}"
MS_CIRCUIT_BREAKER="${ms_circuit_breaker:-true}"
Microservices manager
class MicroservicesManager {
    constructor() {
        this.enabled = MS_ENABLED
        this.discovery = MS_DISCOVERY
        this.communication = MS_COMMUNICATION
        this.loadBalancing = MS_LOAD_BALANCING
        this.circuitBreaker = MS_CIRCUIT_BREAKER
        this.services = new Map()
        this.stats = {
            services_registered: 0,
            service_calls: 0,
            successful_calls: 0,
            failed_calls: 0
        }
    }
    
    registerService(service) {
        if (!this.discovery) return
        
        this.services.set(service.name, {
            ...service,
            status: 'healthy',
            lastSeen: Date.now(),
            endpoints: []
        })
        
        this.stats.services_registered++
    }
    
    discoverService(serviceName) {
        if (!this.discovery) return null
        
        const service = this.services.get(serviceName)
        if (service && service.status === 'healthy') {
            return service
        }
        
        return null
    }
    
    callService(serviceName, method, data) {
        if (!this.communication) return null
        
        this.stats.service_calls++
        
        const service = this.discoverService(serviceName)
        if (!service) {
            this.stats.failed_calls++
            return null
        }
        
        // Apply circuit breaker
        if (this.circuitBreaker && this.isCircuitOpen(serviceName)) {
            this.stats.failed_calls++
            return null
        }
        
        // Make service call
        const result = this.executeServiceCall(service, method, data)
        
        if (result.success) {
            this.stats.successful_calls++
            this.recordSuccess(serviceName)
        } else {
            this.stats.failed_calls++
            this.recordFailure(serviceName)
        }
        
        return result
    }
    
    isCircuitOpen(serviceName) {
        // Implementation for circuit breaker check
        return false
    }
    
    executeServiceCall(service, method, data) {
        // Implementation for service call execution
        return { success: true, data: 'response' }
    }
    
    recordSuccess(serviceName) {
        // Implementation for success recording
    }
    
    recordFailure(serviceName) {
        // Implementation for failure recording
    }
    
    getStats() {
        return { ...this.stats }
    }
}
Initialize microservices manager
const microservicesManager = new MicroservicesManager()

Dynamic Service Discovery

#!/bin/bash
Dynamic service discovery
discover_microservices() {
    local discovery_file="/var/log/microservices/discovery.json"
    local services=()
    
    # Discover services from various sources
    discover_docker_services
    discover_kubernetes_services
    discover_custom_services
    
    # Generate discovery report
    cat > "$discovery_file" << EOF
{
    "timestamp": "$(date -Iseconds)",
    "services": $(printf '%s\n' "${services[@]}" | jq -R . | jq -s .)
}
EOF
    
    echo "✓ Microservices discovery completed"
}
discover_docker_services() {
    if command -v docker >/dev/null 2>&1; then
        while IFS= read -r container; do
            if [[ -n "$container" ]]; then
                local service_name=$(docker inspect "$container" --format '{{.Config.Labels.service_name}}' 2>/dev/null)
                local service_port=$(docker inspect "$container" --format '{{.Config.ExposedPorts}}' 2>/dev/null | grep -o '[0-9]*' | head -1)
                local service_version=$(docker inspect "$container" --format '{{.Config.Labels.service_version}}' 2>/dev/null)
                
                if [[ -n "$service_name" ]] && [[ -n "$service_port" ]]; then
                    register_microservice "$service_name" "$container" "$service_port" "$service_version"
                fi
            fi
        done < <(docker ps --format "{{.Names}}" | grep -v "microservices")
    fi
}
discover_kubernetes_services() {
    if command -v kubectl >/dev/null 2>&1; then
        while IFS= read -r service; do
            if [[ -n "$service" ]]; then
                local service_name=$(echo "$service" | awk '{print $1}')
                local service_port=$(echo "$service" | awk '{print $5}' | cut -d'/' -f1)
                local service_type=$(echo "$service" | awk '{print $2}')
                
                register_microservice "$service_name" "k8s-$service_name" "$service_port" "$service_type"
            fi
        done < <(kubectl get services --no-headers 2>/dev/null)
    fi
}
discover_custom_services() {
    local custom_services_file="${ms_custom_services_file:-/etc/microservices/custom-services.conf}"
    
    if [[ -f "$custom_services_file" ]]; then
        while IFS= read -r service_line; do
            local service_name="${service_line%:*}"
            local service_config="${service_line#*:}"
            IFS=',' read -r host port version <<< "$service_config"
            
            register_microservice "$service_name" "$host" "$port" "$version"
        done < "$custom_services_file"
    fi
}
register_microservice() {
    local service_name="$1"
    local host="$2"
    local port="$3"
    local version="${4:-v1}"
    local service_file="/tmp/microservice_${service_name//[^a-zA-Z0-9]/_}.json"
    
    cat > "$service_file" << EOF
{
    "name": "$service_name",
    "host": "$host",
    "port": "$port",
    "version": "$version",
    "status": "healthy",
    "last_seen": "$(date -Iseconds)",
    "endpoints": ["$host:$port"],
    "metadata": {
        "version": "$version",
        "environment": "${ms_environment:-production}"
    }
}
EOF
    
    echo "✓ Microservice registered: $service_name ($host:$port) v$version"
}

Inter-Service Communication

#!/bin/bash
Inter-service communication
call_microservice() {
    local service_name="$1"
    local method="$2"
    local endpoint="$3"
    local data="${4:-}"
    local timeout="${5:-30}"
    
    # Get service information
    local service_info=$(get_microservice_info "$service_name")
    if [[ -z "$service_info" ]]; then
        echo "Service not found: $service_name"
        return 1
    fi
    
    # Check circuit breaker
    if is_circuit_open "$service_name"; then
        echo "Circuit breaker is open for service: $service_name"
        return 1
    fi
    
    # Make service call
    local response=$(make_service_call "$service_info" "$method" "$endpoint" "$data" "$timeout")
    local exit_code=$?
    
    # Record result
    if [[ $exit_code -eq 0 ]]; then
        record_service_success "$service_name"
        echo "$response"
    else
        record_service_failure "$service_name"
        echo "Service call failed: $service_name"
        return 1
    fi
}
get_microservice_info() {
    local service_name="$1"
    local service_file="/tmp/microservice_${service_name//[^a-zA-Z0-9]/_}.json"
    
    if [[ -f "$service_file" ]]; then
        cat "$service_file"
    fi
}
is_circuit_open() {
    local service_name="$1"
    local circuit_file="/tmp/circuit_breaker_${service_name//[^a-zA-Z0-9]/_}.json"
    
    if [[ -f "$circuit_file" ]]; then
        local state=$(jq -r '.state' "$circuit_file" 2>/dev/null)
        if [[ "$state" == "open" ]]; then
            return 0
        fi
    fi
    
    return 1
}
make_service_call() {
    local service_info="$1"
    local method="$2"
    local endpoint="$3"
    local data="$4"
    local timeout="$5"
    
    # Extract service details
    local host=$(echo "$service_info" | jq -r '.host')
    local port=$(echo "$service_info" | jq -r '.port')
    
    # Build request URL
    local url="http://$host:$port$endpoint"
    
    # Build curl command
    local curl_cmd="curl -s --max-time $timeout -X $method"
    
    # Add headers
    curl_cmd="$curl_cmd -H 'Content-Type: application/json'"
    curl_cmd="$curl_cmd -H 'X-Service-Caller: microservices-manager'"
    
    # Add data if present
    if [[ -n "$data" ]]; then
        curl_cmd="$curl_cmd -d '$data'"
    fi
    
    # Execute request
    eval "$curl_cmd '$url'"
}
record_service_success() {
    local service_name="$1"
    local circuit_file="/tmp/circuit_breaker_${service_name//[^a-zA-Z0-9]/_}.json"
    
    # Reset failure count on success
    if [[ -f "$circuit_file" ]]; then
        jq '.failure_count = 0 | .state = "closed"' "$circuit_file" > "${circuit_file}.tmp" && mv "${circuit_file}.tmp" "$circuit_file"
    fi
}
record_service_failure() {
    local service_name="$1"
    local circuit_file="/tmp/circuit_breaker_${service_name//[^a-zA-Z0-9]/_}.json"
    local failure_threshold="${ms_failure_threshold:-5}"
    
    # Get current failure count
    local failure_count=0
    if [[ -f "$circuit_file" ]]; then
        failure_count=$(jq -r '.failure_count // 0' "$circuit_file")
    fi
    
    # Increment failure count
    failure_count=$((failure_count + 1))
    
    # Update circuit breaker state
    local state="closed"
    if [[ $failure_count -ge $failure_threshold ]]; then
        state="open"
    fi
    
    cat > "$circuit_file" << EOF
{
    "service": "$service_name",
    "state": "$state",
    "failure_count": $failure_count,
    "last_failure": "$(date -Iseconds)",
    "last_updated": "$(date -Iseconds)"
}
EOF
}

Service Orchestration

#!/bin/bash
Service orchestration
orchestrate_services() {
    local workflow_name="$1"
    local workflow_file="${ms_workflow_file:-/etc/microservices/workflows.conf}"
    
    if [[ -f "$workflow_file" ]]; then
        while IFS= read -r workflow_line; do
            local name="${workflow_line%:*}"
            local steps="${workflow_line#*:}"
            
            if [[ "$name" == "$workflow_name" ]]; then
                execute_workflow "$name" "$steps"
                return 0
            fi
        done < "$workflow_file"
    fi
    
    echo "Workflow not found: $workflow_name"
    return 1
}
execute_workflow() {
    local workflow_name="$1"
    local steps="$2"
    local workflow_log="/var/log/microservices/workflows.log"
    
    echo "$(date '+%Y-%m-%d %H:%M:%S') - Starting workflow: $workflow_name" >> "$workflow_log"
    
    # Parse and execute steps
    IFS=';' read -ra step_array <<< "$steps"
    
    for step in "${step_array[@]}"; do
        IFS=',' read -r service method endpoint data <<< "$step"
        
        echo "$(date '+%Y-%m-%d %H:%M:%S') - Executing step: $service.$method" >> "$workflow_log"
        
        local result=$(call_microservice "$service" "$method" "$endpoint" "$data")
        local exit_code=$?
        
        if [[ $exit_code -ne 0 ]]; then
            echo "$(date '+%Y-%m-%d %H:%M:%S') - Workflow failed at step: $service.$method" >> "$workflow_log"
            return 1
        fi
        
        echo "$(date '+%Y-%m-%d %H:%M:%S') - Step completed: $service.$method" >> "$workflow_log"
    done
    
    echo "$(date '+%Y-%m-%d %H:%M:%S') - Workflow completed: $workflow_name" >> "$workflow_log"
    echo "✓ Workflow completed: $workflow_name"
}

Service Resilience Patterns

#!/bin/bash
Service resilience patterns
retry_service_call() {
    local service_name="$1"
    local method="$2"
    local endpoint="$3"
    local data="${4:-}"
    local max_retries="${5:-3}"
    local backoff_delay="${6:-1}"
    
    local attempt=1
    local delay=$backoff_delay
    
    while [[ $attempt -le $max_retries ]]; do
        echo "Attempt $attempt of $max_retries: Calling $service_name"
        
        local result=$(call_microservice "$service_name" "$method" "$endpoint" "$data")
        local exit_code=$?
        
        if [[ $exit_code -eq 0 ]]; then
            echo "✓ Service call succeeded on attempt $attempt"
            return 0
        fi
        
        if [[ $attempt -eq $max_retries ]]; then
            echo "✗ Service call failed after $max_retries attempts"
            return 1
        fi
        
        echo "Retrying in ${delay}s..."
        sleep "$delay"
        delay=$((delay * 2))
        attempt=$((attempt + 1))
    done
}
bulkhead_service_calls() {
    local service_name="$1"
    local max_concurrent="${2:-5}"
    local semaphore_file="/tmp/semaphore_${service_name//[^a-zA-Z0-9]/_}"
    
    # Check semaphore
    if [[ -f "$semaphore_file" ]]; then
        local current_count=$(cat "$semaphore_file")
        if [[ $current_count -ge $max_concurrent ]]; then
            echo "Bulkhead limit reached for service: $service_name"
            return 1
        fi
    fi
    
    # Increment semaphore
    echo $((current_count + 1)) > "$semaphore_file"
    
    # Execute service call
    local result=$(call_microservice "$service_name" "$method" "$endpoint" "$data")
    local exit_code=$?
    
    # Decrement semaphore
    local new_count=$(cat "$semaphore_file")
    echo $((new_count - 1)) > "$semaphore_file"
    
    return $exit_code
}
timeout_service_call() {
    local service_name="$1"
    local method="$2"
    local endpoint="$3"
    local data="${4:-}"
    local timeout="${5:-30}"
    
    # Execute service call with timeout
    local result=$(timeout "$timeout" bash -c "call_microservice '$service_name' '$method' '$endpoint' '$data'")
    local exit_code=$?
    
    if [[ $exit_code -eq 124 ]]; then
        echo "Service call timed out: $service_name"
        record_service_failure "$service_name"
        return 1
    fi
    
    return $exit_code
}

Service Monitoring

#!/bin/bash
Service monitoring
monitor_microservices() {
    local monitoring_file="/var/log/microservices/monitoring.json"
    
    # Collect service metrics
    local total_services=$(get_total_services)
    local healthy_services=$(get_healthy_services)
    local total_calls=$(get_total_service_calls)
    local successful_calls=$(get_successful_service_calls)
    local failed_calls=$(get_failed_service_calls)
    local average_response_time=$(get_average_response_time)
    
    # Generate monitoring report
    cat > "$monitoring_file" << EOF
{
    "timestamp": "$(date -Iseconds)",
    "total_services": $total_services,
    "healthy_services": $healthy_services,
    "unhealthy_services": $((total_services - healthy_services)),
    "health_percentage": $((healthy_services * 100 / total_services)),
    "total_calls": $total_calls,
    "successful_calls": $successful_calls,
    "failed_calls": $failed_calls,
    "success_rate": $(((successful_calls * 100) / total_calls)),
    "average_response_time_ms": $average_response_time
}
EOF
    
    echo "✓ Microservices monitoring completed"
}
get_total_services() {
    find /tmp -name "microservice_*.json" -type f | wc -l
}
get_healthy_services() {
    local healthy_count=0
    
    while IFS= read -r service_file; do
        if [[ -f "$service_file" ]]; then
            local status=$(jq -r '.status' "$service_file" 2>/dev/null)
            if [[ "$status" == "healthy" ]]; then
                healthy_count=$((healthy_count + 1))
            fi
        fi
    done < <(find /tmp -name "microservice_*.json" -type f)
    
    echo "$healthy_count"
}
get_total_service_calls() {
    local call_log="/var/log/microservices/calls.log"
    
    if [[ -f "$call_log" ]]; then
        wc -l < "$call_log"
    else
        echo "0"
    fi
}
get_successful_service_calls() {
    local call_log="/var/log/microservices/calls.log"
    
    if [[ -f "$call_log" ]]; then
        grep -c "SUCCESS" "$call_log" 2>/dev/null || echo "0"
    else
        echo "0"
    fi
}
get_failed_service_calls() {
    local call_log="/var/log/microservices/calls.log"
    
    if [[ -f "$call_log" ]]; then
        grep -c "FAILED" "$call_log" 2>/dev/null || echo "0"
    else
        echo "0"
    fi
}
get_average_response_time() {
    local response_log="/var/log/microservices/responses.log"
    
    if [[ -f "$response_log" ]]; then
        local total_time=0
        local call_count=0
        
        while IFS= read -r log_line; do
            local response_time=$(echo "$log_line" | grep -o 'response_time=[0-9]*' | cut -d'=' -f2)
            if [[ -n "$response_time" ]]; then
                total_time=$((total_time + response_time))
                call_count=$((call_count + 1))
            fi
        done < "$response_log"
        
        if [[ $call_count -gt 0 ]]; then
            echo $((total_time / call_count))
        else
            echo "0"
        fi
    else
        echo "0"
    fi
}

🎯 Real-World Configuration Examples

Complete Microservices Configuration

microservices-config.tsk
microservices_config:
  enabled: true
  discovery: true
  communication: true
  load_balancing: true
  circuit_breaker: true
#microservices: enabled
#ms-enabled: true
#ms-discovery: true
#ms-communication: true
#ms-load-balancing: true
#ms-circuit-breaker: true
#ms-orchestration: true
#ms-monitoring: true
#ms-tracing: true
#ms-resilience: true
#ms-scalability: true
#ms-security: true
#ms-config:
 discovery:
   enabled: true
   sources:
     - "docker"
     - "kubernetes"
     - "custom"
   interval: 30
 communication:
   enabled: true
   protocol: "http"
   timeout: 30
   retries: 3
 load_balancing:
   enabled: true
   algorithm: "round-robin"
   health_check: true
 circuit_breaker:
   enabled: true
   failure_threshold: 5
   timeout: 60
   half_open_requests: 3
 orchestration:
   enabled: true
   workflows_file: "/etc/microservices/workflows.conf"
   max_concurrent: 10
 monitoring:
   enabled: true
   interval: 60
   metrics:
     - "service_count"
     - "call_count"
     - "response_time"
     - "error_rate"
 resilience:
   enabled: true
   patterns:
     - "retry"
     - "timeout"
     - "bulkhead"
     - "circuit_breaker"
 scalability:
   enabled: true
   auto_scaling: true
   min_instances: 1
   max_instances: 10
 security:
   enabled: true
   authentication: true
   authorization: true
   encryption: true

Multi-Service Architecture

multi-service-architecture.tsk
multi_service_architecture:
  services:
    - name: user-service
      discovery: true
      communication: true
      load_balancing: true
    - name: order-service
      discovery: true
      communication: true
      load_balancing: true
    - name: payment-service
      discovery: true
      communication: true
      load_balancing: true
#ms-user-service: enabled
#ms-order-service: enabled
#ms-payment-service: enabled
#ms-config:
 services:
   user_service:
     enabled: true
     discovery: true
     communication: true
     load_balancing: true
     target: "user-service:8080"
   order_service:
     enabled: true
     discovery: true
     communication: true
     load_balancing: true
     target: "order-service:8080"
   payment_service:
     enabled: true
     discovery: true
     communication: true
     load_balancing: true
     target: "payment-service:8080"

🚨 Troubleshooting Microservices

Common Issues and Solutions

1. Service Discovery Issues

Debug service discovery
debug_service_discovery() {
    echo "Debugging microservices discovery..."
    discover_microservices
    echo "Service discovery debug completed"
}

2. Service Communication Issues

Debug service communication
debug_service_communication() {
    local service_name="$1"
    local method="${2:-GET}"
    local endpoint="${3:-/health}"
    echo "Debugging service communication for $service_name"
    call_microservice "$service_name" "$method" "$endpoint"
}

🔒 Security Best Practices

Microservices Security Checklist

Security validation
validate_microservices_security() {
    echo "Validating microservices security configuration..."
    # Check service authentication
    if [[ "${ms_authentication}" == "true" ]]; then
        echo "✓ Service authentication enabled"
    else
        echo "⚠ Service authentication not enabled"
    fi
    # Check service authorization
    if [[ "${ms_authorization}" == "true" ]]; then
        echo "✓ Service authorization enabled"
    else
        echo "⚠ Service authorization not enabled"
    fi
    # Check service encryption
    if [[ "${ms_encryption}" == "true" ]]; then
        echo "✓ Service encryption enabled"
    else
        echo "⚠ Service encryption not enabled"
    fi
}

📈 Performance Optimization Tips

Microservices Performance Checklist

Performance validation
validate_microservices_performance() {
    echo "Validating microservices performance configuration..."
    # Check service discovery interval
    local discovery_interval="${ms_discovery_interval:-30}" # seconds
    if [[ "$discovery_interval" -ge 10 ]]; then
        echo "✓ Reasonable discovery interval ($discovery_interval s)"
    else
        echo "⚠ Frequent discovery may impact performance ($discovery_interval s)"
    fi
    # Check circuit breaker
    if [[ "${ms_circuit_breaker}" == "true" ]]; then
        echo "✓ Circuit breaker enabled"
    else
        echo "⚠ Circuit breaker not enabled"
    fi
    # Check load balancing
    if [[ "${ms_load_balancing}" == "true" ]]; then
        echo "✓ Load balancing enabled"
    else
        echo "⚠ Load balancing not enabled"
    fi
}

🎯 Next Steps

- Microservices Optimization: Learn about advanced microservices optimization - Microservices Visualization: Create microservices visualization dashboards - Microservices Correlation: Implement microservices correlation and alerting - Microservices Compliance: Set up microservices compliance and auditing

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Microservices transform your TuskLang configuration into an intelligent, distributed service system. It brings modern distributed computing to your Bash applications with dynamic discovery, intelligent communication, and comprehensive service orchestration!