Thanks. Apparently lift n shift wasn’t as clean as I thought, there are a few checks to be done before and after to ensure a smooth lift n shift operation (Postgress was being upgraded from12.0 to 13.0 which taught me a few lessons in the lift n shift process). Here’s a step by step guide for future reference for folks trying to move to a Amazon LightSail server (1GB RAM):
Original Server
- Create backup to S3
cd /var/discourse-
./launcher rebuild# get the latest build for an easy transition -
./launcher cleanup# clean it up to remove old data and reduce the package size -
./launcher stop app# not doing this causes a failure while trying to rebuild it later with Postgres tar -zcvf /var/discourse discourse.tar.gz
New Amazon Light Sail Server
- Install Ubuntu 20.20 image from Amazon (1GB RAM)
- Install Docker
- Create 2GB swap # not doing this may cause rebuild to fail
- Configure
vm.overcommit_memory=1# not doing this may cause a failure with Postgres during a rebuild - FTPS/transfer discourse.tar.gz from original server
tar -zxvf discourse.tar.gz -C /cd /var/discourse- Set
UNICORN_WORKERSinapp.ymlto 2 # increasing it beyond 2 with 1GB RAM will risk swapping and throttling it due to excessive disk activity ./launcher rebuild- Change DNS to point to new Amazon server
Is there an easier way to migrate servers (lift n shift) without having to go through a discourse setup process?