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Zero Downtime Postgres Upgrades
The document discusses zero-downtime upgrades for PostgreSQL databases, highlighting the challenges of connection resets and dropped requests during upgrades. It emphasizes the use of tools like Pacemaker and PgBouncer to manage these upgrades without interrupting service. The document concludes with best practices and potential pitfalls while managing PostgreSQL upgrades and invites further inquiry into their PostgreSQL setup.
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Zero Downtime Postgres Upgrades
- 1. Zero-downtime Postgres upgrades Restartingdatabases without the apps noticing @ChrisSinjo
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- 3. POST /cash/monies HTTP/1.1 {amount: 100 } 💰💰💰
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- 10. –Postgres “Speak to thisone node.”
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- 20. You gotta perform: -Many steps - In the right order - Perfectly
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- 25. How do weknow a node has failed?
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- 30. Client PostgresPostgresPostgres Repl Repl PacemakerPacemaker Pacemaker
- 31. Client PostgresPostgresPostgres Repl Repl PacemakerPacemaker Pacemaker VIP
- 32. Client PostgresPostgresPostgres Repl Repl PacemakerPacemaker Pacemaker VIP
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- 41. You gotta know: -Postgres - Distributed systems - Pacemaker
- 42. Get someone else torun it for you
- 43. Client PostgresPostgresPostgres Repl Repl PacemakerPacemaker Pacemaker VIP
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- 47. Every move means aconnection reset
- 48. Every move means droppedrequests
- 49. POST /cash/monies HTTP/1.1 {amount: 100 } 💰💰💰
- 50. POST /cash/monies HTTP/1.1 {amount: 100 } 500 Internal Server Error
- 51. What does this meanfor upgrades?
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- 54. Client PostgresPostgresPostgres Pacemaker Pacemaker Pacemaker 9.4.99.4.9 9.4.9 Repl Repl VIP
- 55. Client PostgresPostgresPostgres Pacemaker Pacemaker Pacemaker 9.4.109.4.9 9.4.10 Repl Repl VIP
- 56. Client PostgresPostgresPostgres Repl Repl VIP Pacemaker PacemakerPacemaker 9.4.10 9.4.9 9.4.10
- 57. Every upgrade means aconnection reset
- 58. Every upgrade means droppedrequests
- 59. POST /cash/monies HTTP/1.1 {amount: 100 } 500 Internal Server Error
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- 71. PgBouncer has This OneWeird Trick™
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- 74. Client PostgresPostgresPostgres Pacemaker Pacemaker Pacemaker PgBouncerPgBouncerPgBouncer VIP VIP PAUSE;
- 75. Client PostgresPostgresPostgres Pacemaker Pacemaker Pacemaker PgBouncerPgBouncerPgBouncer VIP PAUSE; VIP
- 76. Client PostgresPostgresPostgres Pacemaker Pacemaker Pacemaker PgBouncerPgBouncerPgBouncer VIP PAUSE; VIP
- 77. So what doesthis mean for upgrades?
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