feat: добавлен port-forward для кластера Kubernetes
- Создан скрипт scripts/portforward.py для управления port-forward - Добавлены команды в Makefile: - make k8s portforward create - создать port-forward для всех сервисов - make k8s portforward list - показать активные port-forward - make k8s portforward clear - очистить все port-forward - make k8s portforward delete PORT - удалить конкретный port-forward - Сервисы остаются с типом ClusterIP - Port-forward автоматически создается для Prometheus, Grafana, Kiali и Metrics Server - Порты: Prometheus 9090, Grafana 3000, Kiali 20001, Metrics Server 4443
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Сергей Антропов
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scripts/portforward.py
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scripts/portforward.py
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#!/usr/bin/env python3
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"""
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Скрипт для управления port-forward для Kubernetes сервисов
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Автор: Сергей Антропов
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Сайт: https://devops.org.ru
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"""
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import sys
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import yaml
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import subprocess
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import os
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import signal
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import time
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def get_cluster_name():
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"""Получаем имя кластера из preset файла"""
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preset_file = "molecule/presets/k8s/kubernetes.yml"
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with open(preset_file, 'r') as f:
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preset = yaml.safe_load(f)
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return preset['kind_clusters'][0]['name']
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def run_cmd(cmd):
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"""Выполняет команду и возвращает результат"""
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print(f"[run] {cmd}")
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result = subprocess.run(cmd, shell=True, capture_output=True, text=True)
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if result.returncode != 0:
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print(f"[error] {result.stderr}")
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else:
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print(result.stdout)
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return result
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def get_portforward_pids():
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"""Получает PID процессов port-forward"""
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result = subprocess.run("ps aux | grep 'kubectl.*port-forward' | grep -v grep", shell=True, capture_output=True, text=True)
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pids = []
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for line in result.stdout.split('\n'):
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if line.strip():
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pids.append(int(line.split()[1]))
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return pids
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def list_portforwards():
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"""Показывает список всех активных port-forward"""
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pids = get_portforward_pids()
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if not pids:
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print("❌ Нет активных port-forward")
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return
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print("📋 Активные port-forward:")
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result = subprocess.run("ps aux | grep 'kubectl.*port-forward' | grep -v grep", shell=True, capture_output=True, text=True)
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for line in result.stdout.split('\n'):
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if line.strip():
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print(f" {line}")
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def clear_portforwards():
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"""Завершает все процессы port-forward"""
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pids = get_portforward_pids()
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if not pids:
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print("❌ Нет активных port-forward")
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return
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print(f"🗑️ Завершение {len(pids)} процессов port-forward...")
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for pid in pids:
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try:
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os.kill(pid, signal.SIGTERM)
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print(f"✅ Процесс {pid} завершен")
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except ProcessLookupError:
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print(f"⚠️ Процесс {pid} уже не существует")
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# Ждем завершения процессов
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time.sleep(2)
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# Принудительно убиваем оставшиеся
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remaining_pids = get_portforward_pids()
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if remaining_pids:
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print("⚠️ Принудительное завершение оставшихся процессов...")
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for pid in remaining_pids:
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try:
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os.kill(pid, signal.SIGKILL)
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print(f"✅ Процесс {pid} принудительно завершен")
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except ProcessLookupError:
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pass
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def create_portforwards():
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"""Создает port-forward для всех сервисов из preset"""
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# Загружаем preset
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preset_file = "molecule/presets/k8s/kubernetes.yml"
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with open(preset_file, 'r') as f:
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preset = yaml.safe_load(f)
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cluster_name = preset['kind_clusters'][0]['name']
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addon_ports = preset['kind_clusters'][0].get('addon_ports', {})
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print(f"🔌 Создание port-forward для кластера: {cluster_name}")
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# Prometheus
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if addon_ports.get('prometheus'):
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port = addon_ports['prometheus']
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print(f" - Prometheus: localhost:{port} -> monitoring/monitoring-kube-prometheus-prometheus:9090")
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subprocess.Popen([
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"kubectl",
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"--server=https://{}-control-plane:6443".format(cluster_name),
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"--insecure-skip-tls-verify",
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"port-forward",
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"-n", "monitoring",
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"svc/monitoring-kube-prometheus-prometheus",
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f"{port}:9090"
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], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
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# Grafana
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if addon_ports.get('grafana'):
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port = addon_ports['grafana']
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print(f" - Grafana: localhost:{port} -> monitoring/monitoring-grafana:80")
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subprocess.Popen([
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"kubectl",
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"--server=https://{}-control-plane:6443".format(cluster_name),
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"--insecure-skip-tls-verify",
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"port-forward",
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"-n", "monitoring",
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"svc/monitoring-grafana",
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f"{port}:80"
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], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
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# Kiali
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if addon_ports.get('kiali'):
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port = addon_ports['kiali']
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print(f" - Kiali: localhost:{port} -> istio-system/kiali:20001")
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subprocess.Popen([
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"kubectl",
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"--server=https://{}-control-plane:6443".format(cluster_name),
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"--insecure-skip-tls-verify",
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"port-forward",
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"-n", "istio-system",
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"svc/kiali",
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f"{port}:20001"
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], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
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# Metrics Server
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if addon_ports.get('metrics_server'):
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port = addon_ports['metrics_server']
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print(f" - Metrics Server: localhost:{port} -> kube-system/metrics-server:4443")
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subprocess.Popen([
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"kubectl",
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"--server=https://{}-control-plane:6443".format(cluster_name),
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"--insecure-skip-tls-verify",
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"port-forward",
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"-n", "kube-system",
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"svc/metrics-server",
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f"{port}:4443"
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], stdout=subprocess.DEVNULL, stderr=subprocess.DEVNULL)
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time.sleep(2)
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print("✅ Port-forward создан")
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list_portforwards()
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def delete_portforward(port):
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"""Удаляет port-forward для конкретного порта"""
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pids = get_portforward_pids()
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if not pids:
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print(f"❌ Нет активных port-forward на порту {port}")
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return
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# Находим процесс с нужным портом
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result = subprocess.run(f"ps aux | grep 'kubectl.*port-forward.*:{port}' | grep -v grep", shell=True, capture_output=True, text=True)
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if not result.stdout.strip():
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print(f"❌ Не найден port-forward на порту {port}")
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return
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# Извлекаем PID
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pid = int(result.stdout.split()[1])
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print(f"🗑️ Завершение port-forward на порту {port} (PID: {pid})...")
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try:
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os.kill(pid, signal.SIGTERM)
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print(f"✅ Port-forward на порту {port} завершен")
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except ProcessLookupError:
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print(f"⚠️ Процесс {pid} уже не существует")
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def main():
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if len(sys.argv) < 2:
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print("Usage: portforward.py <create|list|delete|clear> [port]")
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sys.exit(1)
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command = sys.argv[1]
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if command == "create":
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create_portforwards()
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elif command == "list":
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list_portforwards()
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elif command == "clear":
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clear_portforwards()
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elif command == "delete":
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if len(sys.argv) < 3:
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print("Usage: portforward.py delete <port>")
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sys.exit(1)
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port = sys.argv[2]
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delete_portforward(port)
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else:
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print(f"❌ Неизвестная команда: {command}")
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sys.exit(1)
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if __name__ == "__main__":
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main()
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