Our remote builders have been busy toiling away at handcrafting your Docker images on deploy for years now but today then get an upgrade! Previously, builders were running Docker 20 and Buildx 0.7 but today we’re rolling out an upgraded version which will use Docker 24 and Buildx 0.12.
If you want to upgrade immediately, you’ll need to destroy your remote builder app and when you run a new deploy, a new shiny remote builder will be automatically created.
# Change the app name to your builder's name.
$ fly apps destroy fly-builder-old-tree-1234
# Deploy your application as usual.
$ fly deploy
You shouldn’t notice any big changes with the upgrade and existing builds should work as normal. If you run into any issues, please let us know!