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Opened 2 years ago

Last modified 2 years ago

#43698 new defect (bug)

4.9.5 broke site behind load balancer, forwards to localhost

Reported by: ssuess Owned by:
Milestone: Awaiting Review Priority: normal
Severity: major Version: 4.9.5
Component: General Keywords:
Focuses: Cc:


I have 2 wordpress web servers behind a load balancer. When updating from 4.9.4 to 4.9.5, these sites broke if accessed from the main domain (but continue to be accessible if I use their alternate addresses which is obvi not possible for our end users). Instead of the site loading by going to the main domain https://example.com, everyone who accesses the domain is instead directed to https://localhost.

As I said, if someone accessed https://wp1.example.com or https://wp2.example.com (the direct addresses), the sites work. For now, I have reverted to 4.9.4 which fixes the problem, but I would like to figure out a long term fix. Any suggestions?

FYI inside my wp-config files I am using these directives:

define('WP_SITEURL', 'https://' . $_SERVERHTTP_HOST?);
define('WP_HOME', 'https://' . $_SERVERHTTP_HOST?);

Which I need in place to be able to address the machines directly as well as having them work with the main domain via the load balancer.

I think I found the changeset responsible for this behaviour (https://core.trac.wordpress.org/changeset/42894) but still have no workable fix.

Change History (4)

#1 @ssuess
2 years ago

  • Severity changed from normal to major

#2 @ssuess
2 years ago

I was able to work around this and update by changing my wp-config directives to:

define('WP_SITEURL', 'https://' . $_SERVER['SERVER_NAME']);
define('WP_HOME', 'https://' . $_SERVER['SERVER_NAME']);

And also adding a param to my nginx conf to properly account for variable server names:

fastcgi_param SERVER_NAME $host;

without both of the above, my particular setup would not work properly.

#3 @ssuess
2 years ago

spoke too soon, all kinds of badly formatted page if connecting to load balancer, despite ssl insecure content fixer. Reverted to 4.9.4 and undid changes and problem went away.

#4 @ssuess
2 years ago

Still super broken....

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