Clustering Guide
Guide to setting up and managing clustered environments with Lambda Softworks' automation scripts.
This guide covers clustering configuration and management for scalable, distributed systems using Lambda Softworks' automation tools.
Clustering Basics
Core Concepts
Node Management
- Node roles
- Node discovery
- Health monitoring
- Resource allocation
Data Distribution
- Sharding strategies
- Replication methods
- Consistency models
- Data balancing
Service Orchestration
- Service discovery
- Load balancing
- Service scaling
- Resource scheduling
Cluster Setup
Basic Configuration
# Initialize cluster ./cluster-setup.sh --init \ --nodes "node1,node2,node3" \ --services "web,db,cache" \ --network "10.0.0.0/24" # Add node to cluster ./cluster-setup.sh --add-node \ --name node4 \ --ip 10.0.0.14 \ --role worker
Advanced Configuration
# Configure advanced features ./cluster-setup.sh --advanced \ --scheduler kubernetes \ --storage-driver ceph \ --network-plugin calico # Set up monitoring ./cluster-setup.sh --monitoring \ --prometheus \ --grafana \ --alert-manager
Configuration Files
Basic Cluster Configuration
# /etc/lambdasoftworks/cluster/config.yml
cluster:
name: "production-cluster"
version: "1.0"
nodes:
master:
- name: "master1"
ip: "10.0.0.11"
role: "control-plane"
labels:
type: "master"
zone: "us-east-1a"
- name: "master2"
ip: "10.0.0.12"
role: "control-plane"
labels:
type: "master"
zone: "us-east-1b"
worker:
- name: "worker1"
ip: "10.0.0.21"
role: "worker"
labels:
type: "app"
zone: "us-east-1a"
- name: "worker2"
ip: "10.0.0.22"
role: "worker"
labels:
type: "db"
zone: "us-east-1b"
networking:
pod_cidr: "172.16.0.0/16"
service_cidr: "172.17.0.0/16"
dns_domain: "cluster.local"
services:
- name: "web"
replicas: 3
ports:
- 80
- 443
- name: "db"
replicas: 2
ports:
- 3306
storage: "100Gi"
- name: "cache"
replicas: 3
ports:
- 6379
Advanced Cluster Configuration
# /etc/lambdasoftworks/cluster/advanced-config.yml
cluster:
name: "enterprise-cluster"
control_plane:
api_server:
bind_address: "0.0.0.0"
secure_port: 6443
max_requests: 1500
controller_manager:
concurrent_deployment_syncs: 10
deployment_controller_sync_period: 30s
scheduler:
algorithm:
type: "DefaultProvider"
policy:
name: "LeastRequestedPriority"
weight: 1
networking:
plugin: "calico"
config:
mtu: 1440
ipip_mode: "Always"
nat_outgoing: true
load_balancer:
type: "metallb"
address_pools:
- name: "default"
protocol: "layer2"
addresses:
- "192.168.1.240-192.168.1.250"
ingress:
controller: "nginx"
config:
use_proxy_protocol: true
enable_ssl_passthrough: true
storage:
class: "ceph-rbd"
provisioner: "rbd.csi.ceph.com"
parameters:
clusterID: "ceph-cluster"
pool: "rbd-pool"
imageFormat: "2"
imageFeatures: "layering"
monitoring:
prometheus:
retention: "30d"
storage: "100Gi"
scrape_interval: "15s"
grafana:
admin_user: "admin"
plugins:
- "grafana-piechart-panel"
- "grafana-clock-panel"
alert_manager:
receivers:
- name: "slack"
slack_configs:
- channel: "#alerts"
- name: "email"
email_configs:
- to: "admin@example.com"
logging:
engine: "elasticsearch"
retention: "14d"
indices:
- name: "application"
pattern: "app-logs-*"
retention: "7d"
- name: "system"
pattern: "system-logs-*"
retention: "30d"
backup:
schedule: "0 2 * * *"
retention: "7d"
storage:
type: "s3"
bucket: "cluster-backups"
region: "us-east-1"
Service Configuration
Web Service Cluster
# /etc/lambdasoftworks/cluster/web-service.yml
apiVersion: v1
kind: Service
metadata:
name: web-service
namespace: production
spec:
selector:
app: web
ports:
- name: http
port: 80
targetPort: 8080
type: LoadBalancer
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: web-deployment
namespace: production
spec:
replicas: 3
selector:
matchLabels:
app: web
template:
metadata:
labels:
app: web
spec:
containers:
- name: web
image: nginx:latest
ports:
- containerPort: 8080
resources:
requests:
cpu: "500m"
memory: "512Mi"
limits:
cpu: "1000m"
memory: "1Gi"
livenessProbe:
httpGet:
path: /health
port: 8080
initialDelaySeconds: 30
periodSeconds: 10
Database Cluster
# /etc/lambdasoftworks/cluster/database-cluster.yml
apiVersion: mysql.presslabs.org/v1alpha1
kind: MysqlCluster
metadata:
name: mysql-cluster
namespace: production
spec:
replicas: 2
secretName: mysql-secret
volumeSpec:
persistentVolumeClaim:
storageClassName: ceph-rbd
accessModes: ["ReadWriteOnce"]
resources:
requests:
storage: 100Gi
mysqlConf:
innodb-buffer-pool-size: 4G
max_connections: 1000
podSpec:
resources:
requests:
cpu: "2000m"
memory: "4Gi"
limits:
cpu: "4000m"
memory: "8Gi"
Management Commands
Cluster Management
# Check cluster status ./cluster-manage.sh --status \ --components all \ --format detailed # Scale service ./cluster-manage.sh --scale \ --service web \ --replicas 5 \ --wait
Node Management
# Node maintenance ./cluster-manage.sh --maintenance \ --node worker1 \ --drain \ --timeout 5m # Add node ./cluster-manage.sh --add-node \ --name worker3 \ --role worker \ --zone us-east-1c
Monitoring
Setup Monitoring
# Deploy monitoring stack ./cluster-monitor.sh --deploy \ --components "prometheus,grafana,alertmanager" \ --storage-size 100Gi # Configure alerts ./cluster-monitor.sh --configure-alerts \ --rules-file alerts.yml \ --notification-channels "slack,email"
Example Alert Rules
# /etc/lambdasoftworks/cluster/alerts.yml
groups:
- name: node
rules:
- alert: NodeDown
expr: up == 0
for: 5m
labels:
severity: critical
annotations:
summary: "Node {{ $labels.node }} is down"
- alert: HighCPUUsage
expr: node_cpu_usage > 80
for: 10m
labels:
severity: warning
annotations:
summary: "High CPU usage on {{ $labels.node }}"
- name: pod
rules:
- alert: PodCrashLooping
expr: rate(kube_pod_container_status_restarts_total[15m]) > 0
for: 15m
labels:
severity: warning
annotations:
summary: "Pod {{ $labels.pod }} is crash looping"
Best Practices
Design Principles
Scalability
- Horizontal scaling
- Automated scaling
- Resource optimization
- Load distribution
Reliability
- Node redundancy
- Service resilience
- Data replication
- Failure recovery
Security
- Network policies
- Access control
- Secret management
- Audit logging
Operational Guidelines
Deployment
- Rolling updates
- Canary deployments
- Blue-green deployments
- Rollback procedures
Monitoring
- Resource monitoring
- Performance metrics
- Log aggregation
- Alert management
Maintenance
- Regular updates
- Security patches
- Backup verification
- Capacity planning
Troubleshooting
Common Issues
- Node Problems
# Check node health ./cluster-manage.sh --diagnose-node \ --node worker1 \ --verbose # Reset node ./cluster-manage.sh --reset-node \ --node worker1 \ --force
- Service Issues
# Debug service ./cluster-manage.sh --debug-service \ --service web \ --logs \ --events # Restart service ./cluster-manage.sh --restart-service \ --service web \ --rolling