This material is work-in-progress ...
It doesn't boot yet
Since the 3.10.0 release, Alpine Linux includes u-boot support for the Pine64 A64LTS. Since the 3.11.0 release, Alpine Linux includes a kernel that is new enough to boot it. This page describes how to install the system.
The generic (u-boot) ARM image should be used. Make sure your sdcard is empty before you install Alpine Linux, as all it's contents will be removed!
- download the generic ARM image and unpack it somewhere
- write u-boot to the sdcard
cd <unpacked folder>/u-boot/pine64-lts && dd if=u-boot-sunxi-with-spl.bin of=/path/to/sdcard bs=1024 seek=8
- create a new partition on the sdcard starting from sector 2048, set it as bootable
- format it to ext4 (or any other filesystem that u-boot supports booting from)
- copy over the
extlinuxfolders from the extracted archive to the new partition
Alpine Linux should now boot on your device.