feat: Add Kubernetes module to SAL
- Add Kubernetes cluster management and operations - Include pod, service, and deployment management - Implement pattern-based resource deletion - Support namespace creation and management - Provide Rhai scripting wrappers for all functions - Include production safety features (timeouts, retries, rate limiting)
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Mahmoud-Emad
208
examples/kubernetes/multi_namespace_operations.rhai
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208
examples/kubernetes/multi_namespace_operations.rhai
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//! Multi-namespace Kubernetes operations example
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//!
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//! This script demonstrates working with multiple namespaces and comparing resources across them.
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//!
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//! Prerequisites:
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//! - A running Kubernetes cluster
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//! - Valid kubeconfig file or in-cluster configuration
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//! - Appropriate permissions for the operations
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//!
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//! Usage:
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//! herodo examples/kubernetes/multi_namespace_operations.rhai
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print("=== SAL Kubernetes Multi-Namespace Operations Example ===");
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// Define namespaces to work with
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let target_namespaces = ["default", "kube-system"];
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let managers = #{};
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print("Creating managers for multiple namespaces...");
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// Create managers for each namespace
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for ns in target_namespaces {
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try {
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let km = kubernetes_manager_new(ns);
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managers[ns] = km;
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print("✓ Created manager for namespace: " + ns);
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} catch(e) {
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print("✗ Failed to create manager for " + ns + ": " + e);
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}
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}
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// Function to safely get resource counts
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fn get_safe_counts(km) {
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try {
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return resource_counts(km);
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} catch(e) {
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print(" Warning: Could not get resource counts - " + e);
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return #{};
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}
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}
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// Function to safely get pod list
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fn get_safe_pods(km) {
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try {
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return pods_list(km);
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} catch(e) {
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print(" Warning: Could not list pods - " + e);
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return [];
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}
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}
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// Compare resource counts across namespaces
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print("\n--- Resource Comparison Across Namespaces ---");
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let total_resources = #{};
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for ns in target_namespaces {
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if ns in managers {
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let km = managers[ns];
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print("\nNamespace: " + ns);
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let counts = get_safe_counts(km);
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for resource_type in counts.keys() {
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let count = counts[resource_type];
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print(" " + resource_type + ": " + count);
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// Accumulate totals
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if resource_type in total_resources {
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total_resources[resource_type] = total_resources[resource_type] + count;
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} else {
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total_resources[resource_type] = count;
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}
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}
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}
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}
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print("\n--- Total Resources Across All Namespaces ---");
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for resource_type in total_resources.keys() {
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print("Total " + resource_type + ": " + total_resources[resource_type]);
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}
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// Find namespaces with the most resources
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print("\n--- Namespace Resource Analysis ---");
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let namespace_totals = #{};
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for ns in target_namespaces {
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if ns in managers {
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let km = managers[ns];
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let counts = get_safe_counts(km);
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let total = 0;
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for resource_type in counts.keys() {
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total = total + counts[resource_type];
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}
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namespace_totals[ns] = total;
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print("Namespace '" + ns + "' has " + total + " total resources");
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}
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}
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// Find the busiest namespace
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let busiest_ns = "";
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let max_resources = 0;
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for ns in namespace_totals.keys() {
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if namespace_totals[ns] > max_resources {
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max_resources = namespace_totals[ns];
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busiest_ns = ns;
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}
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}
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if busiest_ns != "" {
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print("🏆 Busiest namespace: '" + busiest_ns + "' with " + max_resources + " resources");
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}
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// Detailed pod analysis
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print("\n--- Pod Analysis Across Namespaces ---");
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let all_pods = [];
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for ns in target_namespaces {
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if ns in managers {
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let km = managers[ns];
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let pods = get_safe_pods(km);
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print("\nNamespace '" + ns + "' pods:");
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if pods.len() == 0 {
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print(" (no pods)");
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} else {
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for pod in pods {
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print(" - " + pod);
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all_pods.push(ns + "/" + pod);
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}
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}
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}
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}
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print("\n--- All Pods Summary ---");
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print("Total pods across all namespaces: " + all_pods.len());
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// Look for common pod name patterns
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print("\n--- Pod Name Pattern Analysis ---");
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let patterns = #{
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"system": 0,
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"kube": 0,
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"coredns": 0,
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"proxy": 0,
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"controller": 0
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};
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for pod_full_name in all_pods {
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let pod_name = pod_full_name.to_lower();
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for pattern in patterns.keys() {
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if pod_name.contains(pattern) {
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patterns[pattern] = patterns[pattern] + 1;
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}
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}
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}
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print("Common pod name patterns found:");
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for pattern in patterns.keys() {
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if patterns[pattern] > 0 {
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print(" '" + pattern + "': " + patterns[pattern] + " pods");
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}
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}
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// Namespace health check
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print("\n--- Namespace Health Check ---");
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for ns in target_namespaces {
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if ns in managers {
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let km = managers[ns];
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print("\nChecking namespace: " + ns);
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// Check if namespace exists (should always be true for our managers)
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let exists = namespace_exists(km, ns);
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if exists {
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print(" ✓ Namespace exists and is accessible");
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} else {
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print(" ✗ Namespace existence check failed");
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}
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// Try to get resource counts as a health indicator
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let counts = get_safe_counts(km);
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if counts.len() > 0 {
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print(" ✓ Can access resources (" + counts.len() + " resource types)");
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} else {
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print(" ⚠ No resources found or access limited");
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}
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}
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}
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// Create a summary report
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print("\n--- Summary Report ---");
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print("Namespaces analyzed: " + target_namespaces.len());
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print("Total unique resource types: " + total_resources.len());
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let grand_total = 0;
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for resource_type in total_resources.keys() {
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grand_total = grand_total + total_resources[resource_type];
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}
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print("Grand total resources: " + grand_total);
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print("\nResource breakdown:");
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for resource_type in total_resources.keys() {
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let count = total_resources[resource_type];
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let percentage = (count * 100) / grand_total;
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print(" " + resource_type + ": " + count + " (" + percentage + "%)");
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}
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print("\n=== Multi-namespace operations example completed! ===");
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