Zero downtime development with Elixir and Kubernetes

Transcript

1. ZERO DOWNTIME DEVELOPMENT BartoszGorka96

2. Common issues Downtimes cost money Downtimes are risky and unpredictable

   BartoszGorka96

3. … BartoszGorka96

4. Development Database Application BartoszGorka96

5. Our focus We are most focused on deployment stage and

   often ignore data migration BartoszGorka96

6. … BartoszGorka96

7. - Task 1 - The risks of data migration BartoszGorka96

8. Risks - data migration process 1. Underestimating time and effort

   2. Doing all at once 3. Performance limitations 5. No rollback plan 4. Poor testing and migrating BartoszGorka96

9. … BartoszGorka96

10. - Task 2 - Actions which we can do to

    prevent bugs BartoszGorka96

11. Risks - data migration process 1. Underestimating time and effort

    2. Doing all at once 3. Performance limitations 5. No rollback plan 4. Poor testing and migrating R E
 P
 L
 Y BartoszGorka96

12. We can use 1. down and up instead only change

    2. raw sql instead structures 3. step by step - to be able to rollback changes 5. concurrently index build 4. drop only when confirmed BartoszGorka96

13. … BartoszGorka96

14. Example Add new column with NOT NULL constant* * with

    default value also BartoszGorka96

15. Summary Always be careful with database migration. It’s is surely

    safe to take a backup before execute migration. Always think of backward compatibility usually without reverting migration. BartoszGorka96

16. BartoszGorka96 Please give me a feedback