A real-world production migration from DigitalOcean to Hetzner dedicated, handling 248 GB of MySQL data across 30 databases, 34 Nginx sites, GitLab EE, Neo4j, and live mobile app traffic — with zero downtime.
One thing is that I don’t know for sure if it is containerized or not
They wrote:
Being stuck on CentOS 7 meant we were also stuck on MySQL 5.7
If they used some kind of containerization, the native packages available for the hosts do not affect the specific version of MySQL that they want to use
I suppose they might have used the common mysql instance for containerized infrastructure, or a crufty base image for their container(s)… But you do raise a pretty good indicator that at least a key thing is not running in container.
But I’m not going to judge too hard on container/no container. The vintage of the platform is broadly problematic either way. I’ve seen particularly in enterprise IT some shockingly old container bases, with teams unwilling to refresh those because ‘they work’.
In fact, teams that once would be forced to rebase their crufty dependencies ever so often because they were bundled with an unacceptable OS, now gleefully push their ancient 12 year old stack because containers let it keep running no matter what kernel is running.
They wrote:
If they used some kind of containerization, the native packages available for the hosts do not affect the specific version of MySQL that they want to use
I suppose they might have used the common mysql instance for containerized infrastructure, or a crufty base image for their container(s)… But you do raise a pretty good indicator that at least a key thing is not running in container.
But I’m not going to judge too hard on container/no container. The vintage of the platform is broadly problematic either way. I’ve seen particularly in enterprise IT some shockingly old container bases, with teams unwilling to refresh those because ‘they work’.
In fact, teams that once would be forced to rebase their crufty dependencies ever so often because they were bundled with an unacceptable OS, now gleefully push their ancient 12 year old stack because containers let it keep running no matter what kernel is running.