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feat: Add Kubernetes examples and update dependencies

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- Add Kubernetes examples demonstrating deployment of various
  applications (PostgreSQL, Redis, generic). This improves the
  documentation and provides practical usage examples.
- Add `tokio` dependency for async examples. This enables the use
  of asynchronous operations in the examples.
- Add `once_cell` dependency for improved resource management in
  Kubernetes module. This allows efficient management of
  singletons and other resources.
This commit is contained in:
Mahmoud-Emad
2025-07-10 00:40:11 +03:00
parent 99e121b0d8
commit 6b12001ca2
29 changed files with 1951 additions and 482 deletions
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63
examples/kubernetes/clusters/generic.rs
View File

@@ -11,10 +11,26 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
// Create Kubernetes manager
let km = KubernetesManager::new("default").await?;
// Example 1: Simple web server deployment
println!("=== Example 1: Simple Nginx Web Server ===");
// Clean up any existing resources first
println!("=== Cleaning up existing resources ===");
let apps_to_clean = ["web-server", "node-app", "mongodb"];
km.deploy_application("web-server", "nginx:latest", 2, 80, None)
for app in &apps_to_clean {
match km.deployment_delete(app).await {
Ok(_) => println!("✓ Deleted existing deployment: {}", app),
Err(_) => println!("✓ No existing deployment to delete: {}", app),
}
match km.service_delete(app).await {
Ok(_) => println!("✓ Deleted existing service: {}", app),
Err(_) => println!("✓ No existing service to delete: {}", app),
}
}
// Example 1: Simple web server deployment
println!("\n=== Example 1: Simple Nginx Web Server ===");
km.deploy_application("web-server", "nginx:latest", 2, 80, None, None)
.await?;
println!("✅ Nginx web server deployed!");
@@ -26,12 +42,20 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
node_labels.insert("tier".to_string(), "backend".to_string());
node_labels.insert("environment".to_string(), "production".to_string());
// Configure Node.js environment variables
let mut node_env_vars = HashMap::new();
node_env_vars.insert("NODE_ENV".to_string(), "production".to_string());
node_env_vars.insert("PORT".to_string(), "3000".to_string());
node_env_vars.insert("LOG_LEVEL".to_string(), "info".to_string());
node_env_vars.insert("MAX_CONNECTIONS".to_string(), "1000".to_string());
km.deploy_application(
"node-app", // name
"node:18-alpine", // image
3, // replicas - scale to 3 instances
3000, // port
Some(node_labels), // labels
"node-app", // name
"node:18-alpine", // image
3, // replicas - scale to 3 instances
3000, // port
Some(node_labels), // labels
Some(node_env_vars), // environment variables
)
.await?;
@@ -45,12 +69,25 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
mongo_labels.insert("type".to_string(), "database".to_string());
mongo_labels.insert("engine".to_string(), "mongodb".to_string());
// Configure MongoDB environment variables
let mut mongo_env_vars = HashMap::new();
mongo_env_vars.insert(
"MONGO_INITDB_ROOT_USERNAME".to_string(),
"admin".to_string(),
);
mongo_env_vars.insert(
"MONGO_INITDB_ROOT_PASSWORD".to_string(),
"mongopassword".to_string(),
);
mongo_env_vars.insert("MONGO_INITDB_DATABASE".to_string(), "myapp".to_string());
km.deploy_application(
"mongodb", // name
"mongo:6.0", // image
1, // replicas - single instance for simplicity
27017, // port
Some(mongo_labels), // labels
"mongodb", // name
"mongo:6.0", // image
1, // replicas - single instance for simplicity
27017, // port
Some(mongo_labels), // labels
Some(mongo_env_vars), // environment variables
)
.await?;

34
examples/kubernetes/clusters/postgres.rhai
View File

@@ -10,6 +10,35 @@ print("Creating Kubernetes manager for 'database' namespace...");
let km = kubernetes_manager_new("database");
print("✓ Kubernetes manager created");
// Create the namespace if it doesn't exist
print("Creating namespace 'database' if it doesn't exist...");
try {
create_namespace(km, "database");
print("✓ Namespace 'database' created");
} catch(e) {
if e.to_string().contains("already exists") {
print("✓ Namespace 'database' already exists");
} else {
print("⚠️ Warning: " + e);
}
}
// Clean up any existing resources first
print("\nCleaning up any existing PostgreSQL resources...");
try {
delete_deployment(km, "postgres-cluster");
print("✓ Deleted existing deployment");
} catch(e) {
print("✓ No existing deployment to delete");
}
try {
delete_service(km, "postgres-cluster");
print("✓ Deleted existing service");
} catch(e) {
print("✓ No existing service to delete");
}
// Create PostgreSQL cluster using the convenience method
print("\nDeploying PostgreSQL cluster...");
@@ -19,6 +48,11 @@ try {
"app": "postgres-cluster",
"type": "database",
"engine": "postgresql"
}, #{
"POSTGRES_DB": "myapp",
"POSTGRES_USER": "postgres",
"POSTGRES_PASSWORD": "secretpassword",
"PGDATA": "/var/lib/postgresql/data/pgdata"
});
print("✓ " + result);

39
examples/kubernetes/clusters/postgres.rs
View File

@@ -11,12 +11,50 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
// Create Kubernetes manager for the database namespace
let km = KubernetesManager::new("database").await?;
// Create the namespace if it doesn't exist
println!("Creating namespace 'database' if it doesn't exist...");
match km.namespace_create("database").await {
Ok(_) => println!("✓ Namespace 'database' created"),
Err(e) => {
if e.to_string().contains("already exists") {
println!("✓ Namespace 'database' already exists");
} else {
return Err(e.into());
}
}
}
// Clean up any existing resources first
println!("Cleaning up any existing PostgreSQL resources...");
match km.deployment_delete("postgres-cluster").await {
Ok(_) => println!("✓ Deleted existing deployment"),
Err(_) => println!("✓ No existing deployment to delete"),
}
match km.service_delete("postgres-cluster").await {
Ok(_) => println!("✓ Deleted existing service"),
Err(_) => println!("✓ No existing service to delete"),
}
// Configure PostgreSQL-specific labels
let mut labels = HashMap::new();
labels.insert("app".to_string(), "postgres-cluster".to_string());
labels.insert("type".to_string(), "database".to_string());
labels.insert("engine".to_string(), "postgresql".to_string());
// Configure PostgreSQL environment variables
let mut env_vars = HashMap::new();
env_vars.insert("POSTGRES_DB".to_string(), "myapp".to_string());
env_vars.insert("POSTGRES_USER".to_string(), "postgres".to_string());
env_vars.insert(
"POSTGRES_PASSWORD".to_string(),
"secretpassword".to_string(),
);
env_vars.insert(
"PGDATA".to_string(),
"/var/lib/postgresql/data/pgdata".to_string(),
);
// Deploy the PostgreSQL cluster using the convenience method
println!("Deploying PostgreSQL cluster...");
km.deploy_application(
@@ -25,6 +63,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
2, // replicas (1 master + 1 replica)
5432, // port
Some(labels), // labels
Some(env_vars), // environment variables
)
.await?;

35
examples/kubernetes/clusters/redis.rhai
View File

@@ -10,6 +10,35 @@ print("Creating Kubernetes manager for 'cache' namespace...");
let km = kubernetes_manager_new("cache");
print("✓ Kubernetes manager created");
// Create the namespace if it doesn't exist
print("Creating namespace 'cache' if it doesn't exist...");
try {
create_namespace(km, "cache");
print("✓ Namespace 'cache' created");
} catch(e) {
if e.to_string().contains("already exists") {
print("✓ Namespace 'cache' already exists");
} else {
print("⚠️ Warning: " + e);
}
}
// Clean up any existing resources first
print("\nCleaning up any existing Redis resources...");
try {
delete_deployment(km, "redis-cluster");
print("✓ Deleted existing deployment");
} catch(e) {
print("✓ No existing deployment to delete");
}
try {
delete_service(km, "redis-cluster");
print("✓ Deleted existing service");
} catch(e) {
print("✓ No existing service to delete");
}
// Create Redis cluster using the convenience method
print("\nDeploying Redis cluster...");
@@ -19,6 +48,12 @@ try {
"app": "redis-cluster",
"type": "cache",
"engine": "redis"
}, #{
"REDIS_PASSWORD": "redispassword",
"REDIS_PORT": "6379",
"REDIS_DATABASES": "16",
"REDIS_MAXMEMORY": "256mb",
"REDIS_MAXMEMORY_POLICY": "allkeys-lru"
});
print("✓ " + result);

37
examples/kubernetes/clusters/redis.rs
View File

@@ -11,12 +11,48 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
// Create Kubernetes manager for the cache namespace
let km = KubernetesManager::new("cache").await?;
// Create the namespace if it doesn't exist
println!("Creating namespace 'cache' if it doesn't exist...");
match km.namespace_create("cache").await {
Ok(_) => println!("✓ Namespace 'cache' created"),
Err(e) => {
if e.to_string().contains("already exists") {
println!("✓ Namespace 'cache' already exists");
} else {
return Err(e.into());
}
}
}
// Clean up any existing resources first
println!("Cleaning up any existing Redis resources...");
match km.deployment_delete("redis-cluster").await {
Ok(_) => println!("✓ Deleted existing deployment"),
Err(_) => println!("✓ No existing deployment to delete"),
}
match km.service_delete("redis-cluster").await {
Ok(_) => println!("✓ Deleted existing service"),
Err(_) => println!("✓ No existing service to delete"),
}
// Configure Redis-specific labels
let mut labels = HashMap::new();
labels.insert("app".to_string(), "redis-cluster".to_string());
labels.insert("type".to_string(), "cache".to_string());
labels.insert("engine".to_string(), "redis".to_string());
// Configure Redis environment variables
let mut env_vars = HashMap::new();
env_vars.insert("REDIS_PASSWORD".to_string(), "redispassword".to_string());
env_vars.insert("REDIS_PORT".to_string(), "6379".to_string());
env_vars.insert("REDIS_DATABASES".to_string(), "16".to_string());
env_vars.insert("REDIS_MAXMEMORY".to_string(), "256mb".to_string());
env_vars.insert(
"REDIS_MAXMEMORY_POLICY".to_string(),
"allkeys-lru".to_string(),
);
// Deploy the Redis cluster using the convenience method
println!("Deploying Redis cluster...");
km.deploy_application(
@@ -25,6 +61,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
3, // replicas (Redis cluster nodes)
6379, // port
Some(labels), // labels
Some(env_vars), // environment variables
)
.await?;