如何利用DigitalOcean的API自动切换Floating IP并更新CloudFlare记录
环境
- PHP7
- Debian
- DigitalOcean
- CloudFlare
流程
- Test TCP Status（TCP Status is FALSE）
- Unassign old Floating IP from Droplet
- Assign new Floating IP to Droplet
- Update new Floating IP to Cloudflare
- Delete old Unassigned Floating IP
- Test TCP Status Again（TCP Status is TRUE）
初始化
替换代码高亮行的DigitalOcean_API_KEY以及CloudFlare_API_KEY
替换内容参见官方文档：
- DigitalOcean：https://docs.digitalocean.com/reference/api/api-reference/#section/Authentication
- CloudFlare：https://api.cloudflare.com/#getting-started-requests
DigitalOcean中Droplets的Name要和绑定的域名一致，示例中Droplets的Name为nyc.minirplus.com，Droplets绑定的域名也是nyc.minirplus.com。
使用方法
将代码保存为php文件 auto_swap_ip_digitalocean.php ，放入 /usr/local/sbin ，然后先在shell中进行手动测试
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php /usr/local/sbin/auto_swap_ip_digitalocean.php nyc.minirplus.com |
测试完毕后通过crontab进行定时调用
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# Auto Swap IP For DigitalOcean * * * * * sudo -u root php /usr/local/sbin/auto_swap_ip_digitalocean.php nyc.minirplus.com >> /var/log/auto_swap_ip_digitalocean_nyc.minirplus.com.log |
执行缓存文件保存在当前用户的根目录下的 data_auto_swap_ip_digitalocean_'.$server_name.'.json
Test TCP Status的错误次数在 $max_tcp_test_time 设置，默认为15次错误，如果定时任务设置为每分钟的话，15次检测错误会开始激活Swap IP操作。
代码
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<?php echo "====================Auto Swap IP For DigitalOcean===================="; echo "\n"; echo 'Time: '.date("Y-m-d H:i:s"); echo "\n"; function callAPI($method, $url, $data, $auth){ $curl = curl_init(); switch ($method){ case "POST": curl_setopt($curl, CURLOPT_POST, 1); if ($data) curl_setopt($curl, CURLOPT_POSTFIELDS, $data); break; case "PUT": curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "PUT"); if ($data) curl_setopt($curl, CURLOPT_POSTFIELDS, $data); break; case "DELETE": curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "DELETE"); break; default: if ($data) $url = sprintf("%s?%s", $url, http_build_query($data)); } // OPTIONS: curl_setopt($curl, CURLOPT_URL, $url); curl_setopt($curl, CURLOPT_HTTPHEADER, $auth); curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1); curl_setopt($curl, CURLOPT_HTTPAUTH, CURLAUTH_BASIC); // EXECUTE: $result = curl_exec($curl); if(!$result){ $httpcode = curl_getinfo($curl, CURLINFO_HTTP_CODE); curl_close($curl); return $httpcode; } curl_close($curl); return $result; } // load process step function output_json($name, $value, $server_name){ $load_json = load_json($server_name); $load_json["$name"] = $value; $outputJSON = json_encode($load_json); $fp = fopen('data_auto_swap_ip_digitalocean_'.$server_name.'.json', 'w') or die("Unable to open file!"); fwrite($fp, $outputJSON); fclose($fp); } function load_json($server_name){ if(file_exists('data_auto_swap_ip_digitalocean_'.$server_name.'.json')){ $load_json = file_get_contents('data_auto_swap_ip_digitalocean_'.$server_name.'.json'); }else{ $load_json = '{"step":10}'; echo 'Json file not exists, will reset to default: '.$load_json; echo "\n"; } return json_decode($load_json, true); } // set input value if( isset($argv[1])) { $server_name = $argv[1]; echo "server_name: ".$set_domain; echo "\n"; }else{ $server_name = null; echo "server_name Not Set!"."\n"; echo "\n"; die(); } echo 'Get Last Process Status...'; echo "\n"; $last_status = load_json($server_name); echo 'Last process status: '.$last_status['step']; echo "\n"; $digitalocean_api_auth = array( 'Content-Type: application/json', 'Authorization: Bearer $api_key', ); $cloudflare_api_auth = array( 'X-Auth-Email: $account_email', 'X-Auth-Key: $api_key', 'Content-Type: application/json', ); switch ($last_status['step']) { case 0: echo 'Unassign Floating IP...'; echo "\n"; $get_data = callAPI('GET', 'https://api.digitalocean.com/v2/floating_ips', false, $digitalocean_api_auth); $response = json_decode($get_data, true); foreach ($response['floating_ips'] as $value) { if($value['droplet']['name'] == $server_name){ $floating_ip = $value['ip']; $droplet_id = $value['droplet']['id']; } } if(!isset($floating_ip)){ echo 'server has no defined floating ips, will assign a new floating ip'; echo "\n"; output_json('step', 1, $server_name); die(); } echo 'floating_ip is: '.$floating_ip; echo "\n"; echo 'droplet_id is: '.$droplet_id; echo "\n"; echo 'folating ip exists, will Unassign Floating IP...'; echo "\n"; $data_json = json_encode(array( "type" => "unassign" )); $get_data = callAPI('POST', 'https://api.digitalocean.com/v2/floating_ips/'.$floating_ip.'/actions', $data_json, $digitalocean_api_auth); echo 'unassign floating ip success, will assign a new floating ip'; echo "\n"; output_json('step', 1, $server_name); break; case 1: echo 'Assign Floating IP to Droplet...'; echo "\n"; echo 'Get Server ID...'; echo "\n"; $get_data = callAPI('GET', 'https://api.digitalocean.com/v2/droplets', false, $digitalocean_api_auth); $response = json_decode($get_data, true); foreach ($response['droplets'] as $value) { if($value['name'] == $server_name){ $droplet_id = $value['id']; } } if(!isset($droplet_id)){ echo 'use name '.$server_name.' get nothing'; echo "\n"; die(); } echo 'droplet_id is: '.$droplet_id; echo "\n"; echo 'Assign a Floating IP to '.$droplet_id; echo "\n"; $data_json = json_encode(array( "droplet_id" => $droplet_id, )); $get_data = callAPI('POST', 'https://api.digitalocean.com/v2/floating_ips', $data_json, $digitalocean_api_auth); echo 'Next Step --> Update Floating IP to Cloudflare'; echo "\n"; output_json('step', 2, $server_name); break; case 2: echo 'Update Floating IP to Cloudflare...'; echo "\n"; echo 'Get Floating IP...'; echo "\n"; $get_data = callAPI('GET', 'https://api.digitalocean.com/v2/floating_ips', false, $digitalocean_api_auth); $response = json_decode($get_data, true); foreach ($response['floating_ips'] as $value) { if($value['droplet']['name'] == $server_name){ $floating_ip = $value['ip']; $droplet_id = $value['droplet']['id']; } } if(!isset($floating_ip)){ echo 'server has no defined floating ips, need assign a new floating ip'; echo "\n"; die(); } echo 'floating_ip is: '.$floating_ip; echo "\n"; echo 'droplet_id is: '.$droplet_id; echo "\n"; $get_data = callAPI('GET', 'https://api.cloudflare.com/client/v4/zones?name=minirplus.com', false, $cloudflare_api_auth); $response = json_decode($get_data, true); $zone_id = $response['result'][0]['id']; echo 'zone_id is: '.$zone_id; echo "\n"; $target_domain = $server_name; $get_data = callAPI('GET', 'https://api.cloudflare.com/client/v4/zones/'.$zone_id.'/dns_records?type=A&name='.$target_domain, false, $cloudflare_api_auth); $response = json_decode($get_data, true); $dns_records_id = $response['result'][0]['id']; $old_ip = $response['result'][0]['content']; echo 'DNS Record on cloudflare is: '.$old_ip; echo "\n"; $local_ip = $floating_ip; if($local_ip == $old_ip){ $new_ip = $old_ip; echo "the newest ip address $local_ip is same as the cloudflare record $old_ip, will do nothing"; echo "\n"; } else{ $new_ip = $local_ip; echo "the newest ip address $local_ip is different as the cloudflare record $old_ip, will update the record to newest"; echo "\n"; // update ip address $data_array = array( "type" => "A", "name" => $target_domain, "content" => $new_ip, "ttl" => 120, "proxied" => false ); $put_data = callAPI('PUT', 'https://api.cloudflare.com/client/v4/zones/'.$zone_id.'/dns_records/'.$dns_records_id, json_encode($data_array), $cloudflare_api_auth); $response = json_decode($put_data, true); } break; case 3: echo 'Delete Unassigned Floating IPs...'; echo "\n"; echo 'Get Unassigned Floating IPs...'; echo "\n"; $get_data = callAPI('GET', 'https://api.digitalocean.com/v2/floating_ips', false, $digitalocean_api_auth); $response = json_decode($get_data, true); foreach ($response['floating_ips'] as $value) { if($value['droplet'] == NULL){ $floating_ip = $value['ip']; } } if(!isset($floating_ip)){ echo 'no unassigned floating ips'; echo "\n"; output_json('step',4, $server_name); die(); } echo 'unassigned floating_ip is: '.$floating_ip; echo "\n"; echo 'Delete '.$floating_ip.'...'; echo "\n"; $get_data = callAPI('DELETE', 'https://api.digitalocean.com/v2/floating_ips/'.$floating_ip, false, $digitalocean_api_auth); output_json('step',4, $server_name); break; default: echo 'Testing server tcp status...'; echo "\n"; $max_tcp_test_time = 15; $cmd_wget = "wget -q -O - https://ziyuan.baidu.com/robots/doanalysis?site=sjo.minirplus.com"; exec($cmd_wget,$array); $wget_result = json_decode($array[0],true); $tcp_test = $wget_result['status']; if($tcp_test == 9){ echo "tcp test result is $tcp_test, block by chinafirewall, will test again"; echo "\n"; echo "current test time is ".(0-$last_status['step']).", max test time is $max_tcp_test_time"; echo "\n"; if($last_status['step'] > 0){ output_json('step', -1, $server_name); }else{ output_json('step', $last_status['step']-1, $server_name); } if($last_status['step'] <= -($max_tcp_test_time)){ echo "tcp test Reached the max test time: $max_tcp_test_time, will start swap ip process..."; echo "\n"; output_json('step', 0, $server_name); } }else{ echo "tcp test result is $tcp_test, server is running fine"; echo "\n"; output_json('step', 200, $server_name); } } die(); |
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