{"id":51732,"date":"2024-12-03T14:33:23","date_gmt":"2024-12-03T06:33:23","guid":{"rendered":"https:\/\/fwq.ai\/blog\/51732\/"},"modified":"2024-12-03T14:33:23","modified_gmt":"2024-12-03T06:33:23","slug":"linux%e4%b8%8a%e9%85%8d%e7%bd%ae%e9%ab%98%e5%8f%af%e7%94%a8%e7%9a%84%e8%b4%9f%e8%bd%bd%e5%9d%87%e8%a1%a1%e5%99%a8%e7%9b%91%e6%8e%a7%e7%9a%84%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/51732\/","title":{"rendered":"Linux\u4e0a\u914d\u7f6e\u9ad8\u53ef\u7528\u7684\u8d1f\u8f7d\u5747\u8861\u5668\u76d1\u63a7\u7684\u65b9\u6cd5"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Linux\u4e0a\u914d\u7f6e\u9ad8\u53ef\u7528\u7684\u8d1f\u8f7d\u5747\u8861\u5668\u76d1\u63a7\u7684\u65b9\u6cd5<\/h1>\n<p>\u5728\u73b0\u4ee3\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\uff0c\u8d1f\u8f7d\u5747\u8861\u5668\u4f5c\u4e3a\u5173\u952e\u7ec4\u4ef6\uff0c\u4fdd\u8bc1\u4e86\u7cfb\u7edf\u7684\u6027\u80fd\u548c\u53ef\u7528\u6027\u3002\u7136\u800c\uff0c\u8d1f\u8f7d\u5747\u8861\u5668\u81ea\u8eab\u7684\u53ef\u9760\u6027\u4e5f\u81f3\u5173\u91cd\u8981\u3002\u672c\u6587\u8be6\u7ec6\u4ecb\u7ecd\u4e86\u5982\u4f55\u5728 Linux \u7cfb\u7edf\u4e0a\u5b9e\u73b0\u9ad8\u53ef\u7528\u7684\u8d1f\u8f7d\u5747\u8861\u5668\u76d1\u63a7\uff0c\u4fdd\u969c\u7cfb\u7edf\u7a33\u5b9a\u8fd0\u884c\u3002\u901a\u8fc7\u914d\u7f6e Keepalived \u5b9e\u73b0\u9ad8\u53ef\u7528\u6027\u673a\u5236\uff0c\u7ed3\u5408 Python \u811a\u672c\u548c cron \u4efb\u52a1\u5b9a\u65f6\u76d1\u6d4b\u8d1f\u8f7d\u5747\u8861\u5668\u7684\u8fd0\u884c\u72b6\u6001\uff0c\u53ef\u4ee5\u53ca\u65f6\u53d1\u73b0\u5e76\u62a5\u8b66\uff0c\u786e\u4fdd\u4e1a\u52a1\u7cfb\u7edf\u7684\u9ad8\u53ef\u9760\u6027\u3002<\/p>\n<p>\u5982\u4f55\u5728Linux\u4e0a\u914d\u7f6e\u9ad8\u53ef\u7528\u7684\u8d1f\u8f7d\u5747\u8861\u5668\u76d1\u63a7<\/p>\n<p>\u5728\u73b0\u4ee3\u4e92\u8054\u7f51\u5e94\u7528\u67b6\u6784\u4e2d\uff0c\u8d1f\u8f7d\u5747\u8861\u5668\u662f\u4e00\u4e2a\u5173\u952e\u7684\u7ec4\u4ef6\uff0c\u5b83\u53ef\u4ee5\u5c06\u8bbf\u95ee\u8bf7\u6c42\u5206\u914d\u5230\u591a\u4e2a\u670d\u52a1\u5668\u4e0a\uff0c\u4ee5\u63d0\u9ad8\u6574\u4f53\u6027\u80fd\u548c\u53ef\u7528\u6027\u3002\u7136\u800c\uff0c\u8d1f\u8f7d\u5747\u8861\u5668\u672c\u8eab\u4e5f\u53ef\u80fd\u6210\u4e3a\u7cfb\u7edf\u4e2d\u7684\u5355\u70b9\u6545\u969c\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u9ad8\u53ef\u7528\u6027\u6280\u672f\u6765\u786e\u4fdd\u8d1f\u8f7d\u5747\u8861\u5668\u7684\u53ef\u7528\u6027\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u5728Linux\u4e0a\u914d\u7f6e\u9ad8\u53ef\u7528\u7684\u8d1f\u8f7d\u5747\u8861\u5668\u76d1\u63a7\uff0c\u5e76\u63d0\u4f9b\u76f8\u5173\u7684\u4ee3\u7801\u793a\u4f8b\u3002<\/p>\n<ol>\n<li>\u5b89\u88c5\u548c\u914d\u7f6e\u8d1f\u8f7d\u5747\u8861\u5668<\/li>\n<\/ol>\n<p>\u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u9009\u62e9\u4e00\u4e2a\u5408\u9002\u7684\u8d1f\u8f7d\u5747\u8861\u5668\u8f6f\u4ef6\u3002\u5728Linux\u4e0a\u5e38\u7528\u7684\u8d1f\u8f7d\u5747\u8861\u5668\u8f6f\u4ef6\u6709Nginx\u3001HAProxy\u548cKeepalived\u7b49\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u4ee5Keepalived\u4e3a\u4f8b\u8fdb\u884c\u914d\u7f6e\u3002<\/p>\n<p>\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u5728Linux\u4e0a\u5b89\u88c5Keepalived\uff1a<\/p>\n<pre>$ sudo apt-get install keepalived<\/pre>\n<p>\u5b89\u88c5\u5b8c\u6210\u540e\uff0c\u6211\u4eec\u9700\u8981\u914d\u7f6eKeepalived\u4ee5\u542f\u7528\u9ad8\u53ef\u7528\u6027\u3002\u5728\/etc\/keepalived\/\u76ee\u5f55\u4e0b\u521b\u5efa\u4e00\u4e2a\u540d\u4e3akeepalived.conf\u7684\u6587\u4ef6\uff0c\u5e76\u5c06\u4ee5\u4e0b\u914d\u7f6e\u5185\u5bb9\u6dfb\u52a0\u5230\u6587\u4ef6\u4e2d\uff1a<\/p>\n<pre># \u53ea\u5728\u4e3b\u8282\u70b9\u4e0a\u8fd0\u884c\nvrrp_script check_http {\n        script \"\/usr\/local\/bin\/check_http.sh\"\n        interval 2\n}\nvrrp_instance VI_1 {\n        state MASTER\n        virtual_router_id 51\n        priority 100\n        advert_int 1\n        authentication {\n                auth_type PASS\n                auth_pass example\n        }\n        virtual_ipaddress {\n                10.0.0.1\/24\n        }\n        track_script {\n                check_http\n        }\n}<\/pre>\n<p>\u5176\u4e2d\uff0ccheck_http.sh\u662f\u4e00\u4e2a\u81ea\u5b9a\u4e49\u7684\u811a\u672c\uff0c\u7528\u4e8e\u68c0\u67e5\u8d1f\u8f7d\u5747\u8861\u5668\u6240\u5728\u7684\u540e\u7aef\u670d\u52a1\u5668\u7684\u53ef\u7528\u6027\u3002\u811a\u672c\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u9700\u6c42\u7f16\u5199\u3002<\/p>\n<ol>\n<li>\u914d\u7f6e\u8d1f\u8f7d\u5747\u8861\u5668\u76d1\u63a7<\/li>\n<\/ol>\n<p>\u5b8c\u6210Keepalived\u7684\u914d\u7f6e\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u5176\u4ed6\u5de5\u5177\u76d1\u63a7\u8d1f\u8f7d\u5747\u8861\u5668\u7684\u8fd0\u884c\u72b6\u6001\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u4f7f\u7528\u4e00\u4e2a\u7b80\u5355\u7684Python\u811a\u672c\u6765\u76d1\u63a7\u8d1f\u8f7d\u5747\u8861\u5668\u7684\u53ef\u7528\u6027\u3002<\/p>\n<p>\u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u5b89\u88c5Python\u7684requests\u6a21\u5757\uff1a<\/p>\n<pre>$ sudo pip install requests<\/pre>\n<p>\u7136\u540e\uff0c\u521b\u5efa\u4e00\u4e2a\u540d\u4e3acheck_lb.py\u7684Python\u811a\u672c\uff0c\u5e76\u5c06\u4ee5\u4e0b\u4ee3\u7801\u6dfb\u52a0\u5230\u6587\u4ef6\u4e2d\uff1a<\/p>\n<pre>import requests\n\ndef check_lb():\n    try:\n        response = requests.get('http:\/\/10.0.0.1')\n        if response.status_code == 200:\n            print('\u8d1f\u8f7d\u5747\u8861\u5668\u6b63\u5e38\u8fd0\u884c')\n        else:\n            print('\u8d1f\u8f7d\u5747\u8861\u5668\u6545\u969c')\n    except requests.exceptions.RequestException as e:\n        print('\u8d1f\u8f7d\u5747\u8861\u5668\u6545\u969c')\n\nif __name__ == '__main__':\n    check_lb()<\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528requests\u5e93\u6765\u53d1\u9001HTTP\u8bf7\u6c42\u5e76\u68c0\u67e5\u8fd4\u56de\u7684\u72b6\u6001\u7801\u3002\u5982\u679c\u72b6\u6001\u7801\u4e3a200\uff0c\u5219\u8868\u793a\u8d1f\u8f7d\u5747\u8861\u5668\u6b63\u5e38\u8fd0\u884c\uff1b\u5426\u5219\uff0c\u8868\u793a\u8d1f\u8f7d\u5747\u8861\u5668\u6545\u969c\u3002<\/p>\n<ol>\n<li>\u8bbe\u7f6e\u81ea\u52a8\u8fd0\u884c\u76d1\u63a7\u811a\u672c<\/li>\n<\/ol>\n<p>\u4e3a\u4e86\u8ba9\u76d1\u63a7\u811a\u672c\u5b9a\u671f\u8fd0\u884c\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528cron\u4efb\u52a1\u6765\u5b9a\u65f6\u8fd0\u884c\u811a\u672c\u3002\u6253\u5f00\u7ec8\u7aef\u5e76\u8f93\u5165\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre>$ crontab -e<\/pre>\n<p>\u5728\u6253\u5f00\u7684cron\u4efb\u52a1\u7f16\u8f91\u5668\u4e2d\uff0c\u6dfb\u52a0\u4ee5\u4e0b\u5185\u5bb9\uff1a<\/p>\n<pre>*\/5 * * * * \/usr\/bin\/python \/path\/to\/check_lb.py<\/pre>\n<p>\u4e0a\u9762\u7684\u914d\u7f6e\u5c06\u6bcf\u96945\u5206\u949f\u8fd0\u884c\u4e00\u6b21\u76d1\u63a7\u811a\u672c\u3002\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u9700\u6c42\u4fee\u6539\u8fd9\u4e2a\u65f6\u95f4\u95f4\u9694\u3002<\/p>\n<ol>\n<li>\u76d1\u63a7\u62a5\u8b66<\/li>\n<\/ol>\n<p>\u5728\u76d1\u63a7\u811a\u672c\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4fee\u6539check_lb()\u51fd\u6570\uff0c\u6dfb\u52a0\u62a5\u8b66\u903b\u8f91\u3002\u4f8b\u5982\uff0c\u5f53\u8d1f\u8f7d\u5747\u8861\u5668\u6545\u969c\u65f6\u53d1\u9001\u7535\u5b50\u90ae\u4ef6\u6216\u53d1\u9001\u6d88\u606f\u5230\u624b\u673a\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n<p>\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\uff0c\u53d1\u9001\u7535\u5b50\u90ae\u4ef6\u7684\u4ee3\u7801\u7247\u6bb5\uff1a<\/p>\n<pre>import smtplib\nfrom email.mime.text import MIMEText\n\ndef send_email():\n    sender = 'your_email@example.com'\n    receiver = 'recipient@example.com'\n    subject = '\u8d1f\u8f7d\u5747\u8861\u5668\u6545\u969c'\n    message = '\u8d1f\u8f7d\u5747\u8861\u5668\u65e0\u6cd5\u8bbf\u95ee'\n\n    msg = MIMEText(message)\n    msg['Subject'] = subject\n    msg['From'] = sender\n    msg['To'] = receiver\n\n    try:\n        smtp_obj = smtplib.SMTP('localhost')\n        smtp_obj.sendmail(sender, receiver, msg.as_string())\n        smtp_obj.quit()\n        print('\u90ae\u4ef6\u5df2\u53d1\u9001')\n    except smtplib.SMTPException:\n        print('\u90ae\u4ef6\u53d1\u9001\u5931\u8d25')<\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528smtplib\u5e93\u6765\u53d1\u9001\u7535\u5b50\u90ae\u4ef6\u3002\u9996\u5148\uff0c\u9700\u8981\u8bbe\u7f6e\u53d1\u4ef6\u4eba\u548c\u6536\u4ef6\u4eba\u7684\u90ae\u7bb1\u5730\u5740\uff0c\u7136\u540e\u521b\u5efa\u4e00\u4e2aMIMEText\u5bf9\u8c61\uff0c\u5c06\u53d1\u9001\u7684\u6d88\u606f\u548c\u4e3b\u9898\u6dfb\u52a0\u5230\u5bf9\u8c61\u4e2d\uff0c\u5e76\u4f7f\u7528SMTP\u670d\u52a1\u5668\u53d1\u9001\u90ae\u4ef6\u3002<\/p>\n<p>\u5728check_lb()\u51fd\u6570\u4e2d\uff0c\u5f53\u8d1f\u8f7d\u5747\u8861\u5668\u6545\u969c\u65f6\uff0c\u53ef\u4ee5\u8c03\u7528send_email()\u51fd\u6570\u53d1\u9001\u62a5\u8b66\u90ae\u4ef6\u3002<\/p>\n<p>\u603b\u7ed3\uff1a<\/p>\n<p>\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u4ecb\u7ecd\u4e86\u5982\u4f55\u5728Linux\u4e0a\u914d\u7f6e\u9ad8\u53ef\u7528\u7684\u8d1f\u8f7d\u5747\u8861\u5668\u76d1\u63a7\u3002\u6211\u4eec\u4f7f\u7528Keepalived\u6765\u63d0\u4f9b\u8d1f\u8f7d\u5747\u8861\u5668\u7684\u9ad8\u53ef\u7528\u6027\uff0c\u5e76\u4f7f\u7528Python\u811a\u672c\u548ccron\u4efb\u52a1\u6765\u5b9a\u671f\u76d1\u63a7\u8d1f\u8f7d\u5747\u8861\u5668\u7684\u8fd0\u884c\u72b6\u6001\u3002\u6b64\u5916\uff0c\u6211\u4eec\u8fd8\u63d0\u4f9b\u4e86\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\uff0c\u6f14\u793a\u5982\u4f55\u5728\u8d1f\u8f7d\u5747\u8861\u5668\u6545\u969c\u65f6\u53d1\u9001\u7535\u5b50\u90ae\u4ef6\u62a5\u8b66\u3002\u901a\u8fc7\u8fd9\u4e9b\u6b65\u9aa4\uff0c\u60a8\u53ef\u4ee5\u8f7b\u677e\u5730\u8bbe\u7f6e\u8d1f\u8f7d\u5747\u8861\u5668\u7684\u76d1\u63a7\u548c\u62a5\u8b66\u7cfb\u7edf\uff0c\u5e76\u786e\u4fdd\u60a8\u7684\u5e94\u7528\u5177\u6709\u9ad8\u53ef\u7528\u6027\u3002<\/p>\n<p>\u4eca\u5929\u5173\u4e8e\u300aLinux\u4e0a\u914d\u7f6e\u9ad8\u53ef\u7528\u7684\u8d1f\u8f7d\u5747\u8861\u5668\u76d1\u63a7\u7684\u65b9\u6cd5\u300b\u7684\u5185\u5bb9\u5c31\u4ecb\u7ecd\u5230\u8fd9\u91cc\u4e86\uff0c\u662f\u4e0d\u662f\u5b66\u8d77\u6765\u4e00\u76ee\u4e86\u7136\uff01\u60f3\u8981\u4e86\u89e3\u66f4\u591a\u5173\u4e8eLinux,\u76d1\u63a7,\u9ad8\u53ef\u7528,\u8d1f\u8f7d\u5747\u8861\u5668\u7684\u5185\u5bb9\u8bf7\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\uff01<\/p>\n<dl>\n<dt><\/dt>\n<dd>\n   \u4f7f\u7528PHP\u521b\u5efa\u57fa\u7840API\u63a5\u53e3\u7684\u65b9\u6cd5\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"<p>Linux\u4e0a\u914d\u7f6e\u9ad8\u53ef\u7528\u7684\u8d1f\u8f7d\u5747\u8861\u5668\u76d1\u63a7\u7684\u65b9\u6cd5 \u5728\u73b0\u4ee3\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d\uff0c\u8d1f\u8f7d\u5747\u8861\u5668\u4f5c\u4e3a\u5173\u952e\u7ec4\u4ef6\uff0c\u4fdd\u8bc1\u4e86\u7cfb\u7edf\u7684\u6027\u80fd\u548c\u53ef\u7528\u6027\u3002\u7136\u800c\uff0c\u8d1f\u8f7d\u5747\u8861\u5668\u81ea\u8eab\u7684\u53ef\u9760\u6027\u4e5f\u81f3\u5173\u91cd\u8981\u3002\u672c\u6587\u8be6\u7ec6\u4ecb\u7ecd\u4e86\u5982\u4f55\u5728 Linux \u7cfb\u7edf\u4e0a\u5b9e\u73b0\u9ad8\u53ef\u7528\u7684\u8d1f\u8f7d\u5747\u8861\u5668\u76d1\u63a7\uff0c\u4fdd\u969c\u7cfb\u7edf\u7a33\u5b9a\u8fd0\u884c\u3002\u901a\u8fc7\u914d\u7f6e Keepalived \u5b9e\u73b0\u9ad8\u53ef\u7528\u6027\u673a\u5236\uff0c\u7ed3\u5408 Python \u811a\u672c\u548c cron \u4efb\u52a1\u5b9a\u65f6\u76d1\u6d4b\u8d1f\u8f7d\u5747\u8861\u5668\u7684\u8fd0\u884c\u72b6\u6001\uff0c\u53ef\u4ee5\u53ca\u65f6\u53d1\u73b0\u5e76\u62a5\u8b66\uff0c\u786e\u4fdd\u4e1a\u52a1\u7cfb\u7edf\u7684\u9ad8\u53ef\u9760\u6027\u3002 \u5982\u4f55\u5728Linux\u4e0a\u914d\u7f6e\u9ad8\u53ef\u7528\u7684\u8d1f\u8f7d\u5747\u8861\u5668\u76d1\u63a7 \u5728\u73b0\u4ee3\u4e92\u8054\u7f51\u5e94\u7528\u67b6\u6784\u4e2d\uff0c\u8d1f\u8f7d\u5747\u8861\u5668\u662f\u4e00\u4e2a\u5173\u952e\u7684\u7ec4\u4ef6\uff0c\u5b83\u53ef\u4ee5\u5c06\u8bbf\u95ee\u8bf7\u6c42\u5206\u914d\u5230\u591a\u4e2a\u670d\u52a1\u5668\u4e0a\uff0c\u4ee5\u63d0\u9ad8\u6574\u4f53\u6027\u80fd\u548c\u53ef\u7528\u6027\u3002\u7136\u800c\uff0c\u8d1f\u8f7d\u5747\u8861\u5668\u672c\u8eab\u4e5f\u53ef\u80fd\u6210\u4e3a\u7cfb\u7edf\u4e2d\u7684\u5355\u70b9\u6545\u969c\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u9ad8\u53ef\u7528\u6027\u6280\u672f\u6765\u786e\u4fdd\u8d1f\u8f7d\u5747\u8861\u5668\u7684\u53ef\u7528\u6027\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u5728Linux\u4e0a\u914d\u7f6e\u9ad8\u53ef\u7528\u7684\u8d1f\u8f7d\u5747\u8861\u5668\u76d1\u63a7\uff0c\u5e76\u63d0\u4f9b\u76f8\u5173\u7684\u4ee3\u7801\u793a\u4f8b\u3002 \u5b89\u88c5\u548c\u914d\u7f6e\u8d1f\u8f7d\u5747\u8861\u5668 \u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u9009\u62e9\u4e00\u4e2a\u5408\u9002\u7684\u8d1f\u8f7d\u5747\u8861\u5668\u8f6f\u4ef6\u3002\u5728Linux\u4e0a\u5e38\u7528\u7684\u8d1f\u8f7d\u5747\u8861\u5668\u8f6f\u4ef6\u6709Nginx\u3001HAProxy\u548cKeepalived\u7b49\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u4ee5Keepalived\u4e3a\u4f8b\u8fdb\u884c\u914d\u7f6e\u3002 \u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\u5728Linux\u4e0a\u5b89\u88c5Keepalived\uff1a $ sudo apt-get install keepalived \u5b89\u88c5\u5b8c\u6210\u540e\uff0c\u6211\u4eec\u9700\u8981\u914d\u7f6eKeepalived\u4ee5\u542f\u7528\u9ad8\u53ef\u7528\u6027\u3002\u5728\/etc\/keepalived\/\u76ee\u5f55\u4e0b\u521b\u5efa\u4e00\u4e2a\u540d\u4e3akeepalived.conf\u7684\u6587\u4ef6\uff0c\u5e76\u5c06\u4ee5\u4e0b\u914d\u7f6e\u5185\u5bb9\u6dfb\u52a0\u5230\u6587\u4ef6\u4e2d\uff1a # \u53ea\u5728\u4e3b\u8282\u70b9\u4e0a\u8fd0\u884c vrrp_script check_http { script &#8220;\/usr\/local\/bin\/check_http.sh&#8221; interval 2 } vrrp_instance VI_1 { state MASTER virtual_router_id 51 priority 100 advert_int 1 authentication { auth_type PASS auth_pass example } virtual_ipaddress { 10.0.0.1\/24 } track_script { 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