Apache proxy to tomcat - Error during SSL Handshake with remote server (AH00898), pass requ...

Datetime:2016-08-23 03:53:00         Topic: Tomcat          Share        Original >>
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An error like the below means that certificates in the proxy server and the target server are not the same or are expired:
[Sun Apr 10 08:13:51.513836 2016] [proxy:error] [pid 32426:tid 140087715120896] [client] AH00898: Error during SSL Handshake with remote server returned by /some/path
[Sun Apr 10 08:13:51.513848 2016] [proxy_http:error] [pid 32426:tid 140087715120896] [client] AH01097: pass request body failed to (sample.com) from ()
To understand exactly what is going on increase log level temporarily:
LogLevel info proxy:trace5
This will explain what is going on, for example:

[Sun Apr 10 11:45:30.708783 2016] [ssl:info] [pid 26391:tid 140560622925568] [remote] AH02004: SSL Proxy: Peer certificate is expired

A one-liner will reveal why. The cert below just expired:
$ echo | openssl s_client -connect 2>/dev/null | openssl x509 -noout -dates | grep 'notAfter=.*GMT'
notAfter=Apr 10 12:13:04 2016 GMT
To avoid cluster node certificates expiring at a different time that those from the proxy server use the same for all! To confirm they are the same use a hash to compare they are indeed the same:
$ md5sum /opt/tomcat/certs/my.crt
$ md5sum /opt/tomcat/certs/my.crt
$ md5sum /etc/apache2/certs/my.crt 
$ md5sum /etc/apache2/certs/my.key


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