DEV_NOTES.md

NOTES

• https://github.com/fnproject
• Actions
  • create a new state machine
  • invoke a state machine
  • update the flow of a state machine
  • delete a state machine
  • list available state machine
  • list executions for a state machine
  • list list steps for a state machine
• Available state machine States
  • Pass
  • Task
  • Choice
  • Wait
  • Succeed
  • Fail
  • Parallel
  • Map
• Run data should be as short lived as possible
  • I.e. executions and child data should be evicted from the system on a short regular schedule
    • Ex: between 1 and 30 days. Ideally evicted after shipping to logging store
  • The intent here is for operators to house logs and other such data in a more robust logging store

Technologies

• Used by fnProject
  • Databases
    • sqlite3 (default)
  • Message Queues
    • Bolt is golang specific, Alternative needed.
• Possible Candidates
  • https://github.com/weyoss/redis-smq

Docker cleanup commands

• Remove dangling images

docker rmi $(docker image ls -f dangling=true -q --no-trunc)

• Remove previously built MDS Serverless Functions images

docker image ls | grep mds-sf- | awk '{print $3}' | xargs docker rmi