Provides machine initialization through cloud-init.
Ideally, these are relatively small configs to allow for quick starts.
Nothing fancy here, just a little bash and envsubst.
I use Ubuntu 18.04.
Using envsubst, I created a few templates based on files I found in the system-boot partition. To generate a file
for each node, simply run the make target.
$ WIFI_SSID=name WIFI_PASSWORD=password make cloud-init
generating 192.168.1.50
generating 192.168.1.51
generating 192.168.1.52
generating 192.168.1.53
generating 192.168.1.54
generating 192.168.1.60
generating 192.168.1.61
generating 192.168.1.62
generating 192.168.1.63
generating 192.168.1.64
generating 192.168.1.70
generating 192.168.1.71
generating 192.168.1.72
generating 192.168.1.73
generating 192.168.1.74
The output of this script is a directory full of configurations for your each host. I compute host names from the
assigned static IP address and prefix it with ip- as such.
$ ls -1 cloud-init/generated/
ip-192-168-1-50
ip-192-168-1-51
ip-192-168-1-52
ip-192-168-1-53
ip-192-168-1-54
ip-192-168-1-60
ip-192-168-1-61
ip-192-168-1-62
ip-192-168-1-63
ip-192-168-1-64
ip-192-168-1-70
ip-192-168-1-71
ip-192-168-1-72
ip-192-168-1-73
ip-192-168-1-74
Once your configuration has been generated, you can start to work on flashing your base image.
- Using balenaEtcher, flash the base image onto your SD card.
- Once complete, copy the files from the generated host directory to the
system-bootpartition. - After copying the files to
system-boot, you're safe to eject the SD card.
Once all the flash drives are configured, you should be able to boot them up. I start wired for the initial boot up because I ran into issues with cloud-init not initializing properly going through wifi. I was able to reset cloud-init and force a rerun which resolved it. It just required a little more work.