Helpful Coder

I'm not a sysadmin, but I end up doing my best now and then when one of my sites gets into trouble. This is a sort of "after action report" of an incident that I just resolved (hopefully). I woke up and happened to check email on my phone (don't always do this, will now) and was greeted with a uptime robot email that one of my sites was down, and had been for about 4 hours. I quickly checked the site on my phone and yup, it wasn't loading. Ran to the office and hopped on my laptop. SSH to the server, and everything seems fine. Very little load on the server (AWS instance). Did a restart of apache/php/mysql and the site is still down. Weird. Running the site's index.php file on the command line works as expected and fast. Ask a few other people to check, and it's down for them. Then I logged into the AWS console and checked on status there - everything is up and running.... WTF? This is a lightsail instance, and then I noticed the outgoing network traffic h...

This one caused some confusion today! I have an AWS lightsail server set up. It handles multiple different domains - essentially the same codebase, but does different things depending on the hostname (domain) being used to access it. I needed to add a new letsencrypt certificate to the system. This would be the second one I've added. After generating the certificate, I found that the new site (called it domain2) was trying to use the certificat of the first site (domain1) ... I thought I'd generated a certificate that supported both domains, but apparently not. After some poking around (lightsail has its own way of setting up the apache configuration files) I finally figured it out. To fix it, I needed to have two different virtual host (port 443) directives. They were essentially alike, except that that I had to add ServerName and ServerAlias settings appropriate for domain1 and domain2, and set the SSLCertificateFile and SSLCertificateKeyFile settings appropriately. Now I j...

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