The MariaDB/MySQL database software is what stores pages for WordPress and other sites that are run by scripts. Customers should not notice any difference after this change; we’re upgrading it to a more recent version simply to make sure it’s as fast, reliable and secure as possible. We’ve been using the new version on internal and test servers for some time.
At the moment the software is updated on a server, WordPress and other database-backed sites on that server will have 30-60 seconds of unavoidable “downtime”. To minimize the impact of that, we do these upgrades only on Friday, Saturday and Sunday nights between 9 PM and midnight Pacific time (midnight-3 AM Eastern time). This process will be complete on all servers by June 28.
Beyond that one-time brief interruption in service, customers should not notice any difference to how their site works, as we said. But as always, don’t hesitate to contact us if you have any trouble or questions.
We’ve made a change to one of the SSH keys our servers use, and this post explains why a small number of customers may see a warning message as a result. If you don’t use SSH to connect to the command-line shell (most people don’t), you can ignore this post completely.
The change is that the RSA key has been increased in size (to 2,048 bits) to ensure that sites we host pass PCI compliance scans. (This change was unavoidable, because security companies are saying that any keys created years ago using the then-recommended size, like our previous one, must be replaced.)
Most modern SSH software now uses ECDSA keys instead of RSA keys, so this won’t affect most people. But if your SSH software still uses RSA keys, you may see a message like this:
Warning: the RSA host key for 'example.com' differs from the
key for the IP address '192.0.2.3'
Are you sure you want to continue connecting (yes/no)?
Or even more alarmingly, like this:
@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now
It is also possible that a host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
If you see either of these, it’s expected and okay. It’s telling you that it thinks the RSA host key has changed since the last time you connected — which it has.
If your SSH client software completely prevents you from connecting because of an existing entry in your computer’s “known_hosts” file, removing the line it mentions from that file will fix it.
The next time you connect after doing that, you’ll be prompted to add the new key. You can verify the key fingerprint it shows you on our SSH page.
Update 10:58 PM Pacific time: the maintenance described below has been completed, and all services are running normally.
Between 9:00 PM and 11:59 PM Pacific time on Saturday, February 15, 2020, the MySQL database software on each of our servers will be upgraded from MariaDB version 10.0.41 to 10.0.44 (roughly equivalent to MySQL 5.6.47). This will cause an approximately 60 second interruption of service on each MySQL-using customer website at some point during this period.
Between 4:06 PM and 5:03 PM Pacific time today (Aug 22, 2019), sites hosted on the “web08” server were intermittently unavailable due to a technical problem.
The problem was caused by a flood of connections that our systems failed to automatically block as they should. We’ve modified the software that handles this, and we do not expect the problem to recur.
We sincerely apologize to customers affected by this problem; we don’t consider it normal or acceptable, and strive to avoid incidents like this.
Update August 21, 2019: The maintenance described below has been completed for all sites.
Over the next few weeks, we’ll be retiring some old servers and moving sites on those servers to new (often faster) ones. Migrating a site takes just a few seconds in most cases, so it’s likely that neither you nor your visitors will notice this happening.
If someone does view your site while it’s being migrated, they’ll see a maintenance screen with a link to this blog post, like this:
If your site is in the small minority that has a large database (more than a few hundred MB), the migration could take a little longer — perhaps a few minutes. We try to do migrations during slow periods for each site, minimizing the impact on visitors.
There was an intermittent interruption of service for certain customers this morning (July 23rd, 2019) from about 9:15 AM – 10:00 AM Pacific Time.
During this time, a hardware failure in a router at one of our upstream data providers would have dropped incoming traffic for sites hosted in the 184.108.40.206/22 IP address range.
Once aware of the issue, we were able to reroute all traffic for that range through our own routers directly and avoid the issue. We’ve confirmed with the upstream provider that the faulty hardware has been identified and replaced.
We apologize for the trouble this caused customers who were affected.