dm/python/k8s_func.py

import json
import traceback


import yaml
from kubernetes import client, config
from flask import jsonify
import dmPython

# Load in-cluster config

config.load_incluster_config()
v1 = client.CoreV1Api()
namespace = open("/var/run/secrets/kubernetes.io/serviceaccount/namespace").read()
IP = "36.138.114.105"


def list_pods():
    ret = v1.list_namespaced_pod(namespace, watch=False)
    return ({
        "list": [{
            "name": item.metadata.name,
            "ip": item.status.pod_ip
        } for item in ret.items]
    })


def list_services():
    ret = v1.list_namespaced_service(namespace)
    return {
        "list": [{
            "ip": item.spec.cluster_ip,
            "name": item.metadata.name,
            "ports": [port.to_dict() for port in item.spec.ports]
        } for item in ret.items]
    }


def create_pod(type, name):
    # 读取 pod yaml 文件
    with open(f"assets/type{type}-pod.yaml") as f:
        pod_manifest = yaml.safe_load(f)
    pod_manifest["metadata"]["name"] = name
    pod_manifest["metadata"]["labels"]["app"] = name
    # 创建 Pod
    resp = v1.create_namespaced_pod(
        body=pod_manifest,
        namespace=namespace
    )
    # print(f"pod '{resp.metadata.name}' 创建成功")
    # 创建 Service
    with open(f"assets/type{type}-service.yaml") as f:
        service_pod = yaml.safe_load(f)
    service_pod["metadata"]["name"] = name + "-service"
    service_pod["spec"]["selector"]["app"] = name

    resp = v1.create_namespaced_service(
        body=service_pod,
        namespace=namespace
    )
    # print(f"服务 '{resp.metadata.name}' 创建成功")
    if type == 1:
        # 创建成功，再次查询，拿到端口
        service = v1.read_namespaced_service(name=name + "-service", namespace=namespace)
    # print(service)
    # print("访问地址:" + IP + ":" + str(service.spec.ports[0].node_port))
    else:
        service = v1.read_namespaced_service(name=name + "-service", namespace=namespace)
    # print(service)
    # print("访问地址:" + IP + ":" + str(service.spec.ports[0].node_port))
    return "cjcg"


# create_pod(0,'20240101-zt-9-0')

def delete_pod(name):
    v1.delete_namespaced_pod(name=name, namespace=namespace)
    print('deleting pod ' + name)
    v1.delete_namespaced_service(name=name + "-service", namespace=namespace)
    return "删除成功"


def check_dm(name):
    try:
        service = v1.read_namespaced_service(name=name + "-service", namespace=namespace)
        print(service.spec.cluster_ip)
        db = dmPython.connect(user='SYSDBA', password='SYSDBA', host=service.spec.cluster_ip)
        cursor = db.cursor()
        records = cursor.execute("SELECT * FROM V$VERSION").fetchall()
        for record in records:
            print(record)
        return "OK"
    except:
        traceback.print_exc()
        return "NO"