k8s切换Svc-selector（蓝绿环境切换脚本）

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# @Time : 2021/12/22 13:53

#输入服务名：Quality.Service
#deployment 名称格式为:	cbc-qualityinspection-service-blue
#svc Selector 格式为:cbc-qualityinspection-service-blue/green
import os
ServiceName=raw_input("请输入服务名，例：Nginx.Service")

ns = ['cbc','cbe','common']
'''
暂未启用
def SvcnameStr(value):
    str_format=value.split('-')
    end_list = []
    for i in str_format:
        if i == 'service':
            continue
        else:
            end_list.append(i)
    result = ",".join(end_list).replace(',', '-')
    return  result
'''
for namespaces in ns :
    SvcName = "".join(
        [n.strip() for n in os.popen("kubectl -n %s   get svc  |grep -iE %s | awk '{print $1}'"%(namespaces,ServiceName)).readlines()])
    print SvcName
    if SvcName == "":
        continue
    else:
# 检测当前服务运行环境
        RunSvcname = "".join([n.strip() for n in os.popen(
            "kubectl  describe svc -n %s %s | grep Selector | awk -F '=' '{print $2}'" % (namespaces,SvcName)).readlines()])
        if "blue" in RunSvcname:
            print "%s,当前运行环境(%s),切换绿色环境" % (SvcName, RunSvcname)
            #SvcStr= SvcnameStr(SvcName)
            #print SvcStr
            "".join([n.strip() for n in os.popen(
                "kubectl  patch svc %s  -n %s  --type='json' -p  '[{\"op\":\"replace\",\"path\":\"/spec/selector/app\",\"value\":\"%s-green\"}]'" % (
                    SvcName,namespaces,SvcName)).readlines()])
            green = "".join([n.strip() for n in os.popen(
                "kubectl  describe svc -n %s %s | grep Selector | awk -F '=' '{print $2}'" % (namespaces,SvcName)).readlines()])

            print "切换环境为 %s" %(green)
        else:
            print "%s,当前运行环境(%s),切换蓝色环境" % (SvcName, RunSvcname)
            #SvcStr = SvcnameStr(SvcName)
            #print SvcStr
            # cmd = "kubectl  patch svc cbc-nginx-service  -n cbc  --type='json' -p  '[{\"op\":\"replace\",\"path\":\"/spec/selector/app\",\"value\":\"cbc-nginx-green\"}]'"
            "".join([n.strip() for n in os.popen(
                "kubectl  patch svc %s  -n %s  --type='json' -p  '[{\"op\":\"replace\",\"path\":\"/spec/selector/app\",\"value\":\"%s-blue\"}]'" % (
                    SvcName,namespaces,SvcName)).readlines()])
            blue = "".join([n.strip() for n in os.popen(
                "kubectl  describe svc -n %s %s | grep Selector | awk -F '=' '{print $2}'" % (namespaces,SvcName)).readlines()])
            print "切换环境为 %s" % (blue)



# print RunSvcname


# os.popen("kubectl  describe svc -n cbc cbc-webv3-service-ingress | grep Selector | awk -F '=' '{print $2}'")
# os.popen("kubectl  get svc -A  |grep -iE QualityInspection-Service | awk '{print $2}'")