某局点每两个小时会收到监控cas集群可用性为不可用的告警

不涉及

某局点每两个小时会收到监控cas集群可用性为不可用的告警；

（1）iMC所在服务器ping CAS集群的ip地址以及8080端口是否可以ping通；

（2）将apmserver和imcapmedm日志改为debug，等待告警复现；

（3）复现后收集apmserver和imcapmedm日志，收集应用appid和ip地址；

apmserver日志：

2022-03-24 10:24:11,527 [pool-2-thread-29] DEBUG org.apache.http.impl.conn.DefaultClientConnection.sendRequestHeader()  - >> accept: application/json

2022-03-24 10:24:11,527 [pool-2-thread-29] DEBUG org.apache.http.impl.conn.DefaultClientConnection.sendRequestHeader()  - >> Host: 10.45.61.21:8080

2022-03-24 10:24:11,527 [pool-2-thread-29] DEBUG org.apache.http.impl.conn.DefaultClientConnection.sendRequestHeader()  - >> Connection: Keep-Alive

2022-03-24 10:24:11,527 [pool-2-thread-29] DEBUG org.apache.http.impl.conn.DefaultClientConnection.sendRequestHeader()  - >> COOKIE: JSESSIOnID=183C18768592D6E2EC5D2613076BE2CE

2022-03-24 10:24:11,527 [pool-2-thread-29] DEBUG org.apache.http.impl.conn.DefaultClientConnection.sendRequestHeader()  - >> COOKIE2: $Version=1

2022-03-24 10:24:11,528 [pool-2-thread-29] DEBUG org.apache.http.impl.conn.Wire.wire()  - << "HTTP/1.1 403 Forbidden[\r][\n]"

2022-03-24 10:24:11,528 [pool-2-thread-29] DEBUG org.apache.http.impl.conn.Wire.wire()  - << "Cache-Control: no-cache, no-store, max-age=0, must-revalidate[\r][\n]"

2022-03-24 10:24:11,528 [pool-2-thread-29] DEBUG org.apache.http.impl.conn.Wire.wire()  - << "Pragma: no-cache[\r][\n]"

2022-03-24 10:24:11,528 [pool-2-thread-29] DEBUG org.apache.http.impl.conn.Wire.wire()  - << "Expires: 0[\r][\n]"

2022-03-24 10:24:11,529 [pool-2-thread-29] DEBUG org.apache.http.impl.conn.Wire.wire()  - << "X-XSS-Protection: 1; mode=block[\r][\n]"

2022-03-24 10:24:11,529 [pool-2-thread-29] DEBUG org.apache.http.impl.conn.Wire.wire()  - << "X-Frame-Options: DENY[\r][\n]"

2022-03-24 10:24:11,529 [pool-2-thread-29] DEBUG org.apache.http.impl.conn.Wire.wire()  - << "X-Content-Type-Options: nosniff[\r][\n]"

2022-03-24 10:24:11,529 [pool-2-thread-29] DEBUG org.apache.http.impl.conn.Wire.wire()  - << "Content-Type: text/html;charset=utf-8[\r][\n]"

2022-03-24 10:24:11,529 [pool-2-thread-29] DEBUG org.apache.http.impl.conn.Wire.wire()  - << "Content-Language: en[\r][\n]"

2022-03-24 10:24:11,529 [pool-2-thread-29] DEBUG org.apache.http.impl.conn.Wire.wire()  - << "Content-Length: 1128[\r][\n]"

2022-03-24 10:24:11,529 [pool-2-thread-29] DEBUG org.apache.http.impl.conn.Wire.wire()  - << "Date: Thu, 24 Mar 2022 02:27:05 GMT[\r][\n]"

2022-03-24 10:24:11,529 [pool-2-thread-29] DEBUG org.apache.http.impl.conn.Wire.wire()  - << "Server: CVM[\r][\n]"

2022-03-24 10:24:11,530 [pool-2-thread-29] DEBUG org.apache.http.impl.conn.Wire.wire()  - << "[\r][\n]"

2022-03-24 10:24:11,530 [pool-2-thread-29] DEBUG org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader()  - Receiving response: HTTP/1.1 403 Forbidden

告警原因UC向CAS发起的403连接被拒绝了

看现场是用cas集群监控的，这个会建立的连接比较多，可能被cas侧主动拒绝了；看现场cas什么版本，如果是高于E0535版本，建议用new cas集群监控，new cas是使用的批量接口，性能会好很多；

如果低于E0535版本，可以把所有虚机相关指标取消监控看一下是否还有问题；