topic Re: TAC shows a blank page when accessed through AWS Elastic Load Balancer in Installing and Upgrading

TAC shows a blank page when accessed through AWS Elastic Load Balancer

Anonymous — Sat, 16 Nov 2024 07:42:19 GMT

I've recently installed a TAC server in AWS and placed behind an Elastic Load Balancer (ELB). The ELB directs port 80 incoming to port 80 on the TAC server; it also passes 443 (https) traffic to port 80 on the TAC server. When I access http://my.server/org.talend.administrator, everything works fine. If I instead go through https://my.server/org.talend.administrator, I receive a blank page instead of the login page. What do I need to modify so that the login page displays properly over https through a load balancer?

Re: TAC shows a blank page when accessed through AWS Elastic Load Balancer

Anonymous — Wed, 19 Sep 2018 16:13:24 GMT

We are facing the same issue.
We had a TAC 6.1 running in http behing a AWS HTTPS ELB which was receiving 443 request and transfering it to our server on port 80.
Everything was working fine but since we upgraded to TAC 7.x it's not working anymore. I can just see a blank page and no error are showing up.
If we use HTTP during the whole process it works fine.
Please let us know how to fix this behavior.

Re: TAC shows a blank page when accessed through AWS Elastic Load Balancer

Anonymous — Wed, 19 Sep 2018 17:59:48 GMT

This worked for me. Note that by doing this, you'll start getting the blank page when going to 80; only HTTPS will work if you modify it this way.

First, comment these sections in server.xml:

<!--

<Connector port="8080" protocol="HTTP/1.1"

connectionTimeout="20000"

redirectPort="8443" />

-->

<!--

<Connector executor="tomcatThreadPool"

port="8080" protocol="HTTP/1.1"

connectionTimeout="20000"

redirectPort="8443" />

-->

Then, add the following Connector, changing "your.url.here.com" to the DNS entry for your load balancer:

<Connector

port="8080"

protocol="HTTP/1.1"

proxyPort="443"

scheme="https"

secure="true"

proxyName="your.url.here.com"

connectionTimeout="20000"

URIEncoding="UTF-8"

Hope this helps!

Re: TAC shows a blank page when accessed through AWS Elastic Load Balancer

Anonymous — Wed, 19 Sep 2018 18:00:26 GMT

Oh, and restart your server once you've changed server.xml

Re: TAC shows a blank page when accessed through AWS Elastic Load Balancer

Anonymous — Thu, 20 Sep 2018 08:00:10 GMT

TI had to clear the temp and work folders and i worked fine after a restart!

Thank you very much for your help!

Re: TAC shows a blank page when accessed through AWS Elastic Load Balancer

hshermes — Thu, 14 Mar 2019 13:59:18 GMT

We have the same issue . We are offloading ssl configuration at the ELB level and using http for TAC. So like User >> HTTPS: Amazon ELB(SSL)>> HTTP: TAC 8080.

When we first configured ALB with https listener the url to loadbalancer returned black page. We tried the workaround mentioned above and it worked and as mentioned the Direct connect using http is not working and it now returns a blank page.

Is there any way to make this work? During the instance when ALB is unavaailable we want to be able to log into individual instances using http.

We also found the issue seems to be on TAC only the MDM Tac which we also use seems to work both HTTPS ALB and HTTP direct to instance with default configuration on server.xml