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Replace simple pg_dumpall with pgBackRest PITR backup system. This enables recovery to any second, not just the last daily dump. Configuration: - docker/postgres/postgresql.conf: WAL archiving + performance tuning (shared_buffers=512MB, effective_cache_size=2GB for 16GB Mac Mini) - docker/postgres/pgbackrest.conf: stanza config + retention policy Docker (docker-compose.macmini.yml): - postgres: mount custom config, enable WAL archiving - postgres-backup: new pgBackRest container - Storage: /Volumes/ManaData/backups/pgbackrest - Retention: 4 full + 14 differential (~4 weeks) - Compression: Zstandard (zst) Backup Schedule: - 03:00 daily: Full backup - Every 6h: Differential (changes since last full) - Every hour: Incremental (changes since last backup) - Continuous: WAL archiving (every 60s) Documentation (docs/POSTGRES_BACKUP.md): - Complete restore procedures (full, PITR, single DB) - First-time setup instructions - Monitoring and alerting integration Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
23 lines
595 B
Text
23 lines
595 B
Text
# PostgreSQL Configuration for WAL Archiving + pgBackRest
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# Append to default postgresql.conf
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# WAL Archiving (required for Point-in-Time Recovery)
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wal_level = replica
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archive_mode = on
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archive_command = 'pgbackrest --stanza=mana archive-push %p'
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archive_timeout = 60
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# WAL Settings (tuned for 16GB Mac Mini)
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max_wal_senders = 3
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max_wal_size = 1GB
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min_wal_size = 80MB
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# Performance (tuned for 16GB RAM, shared with other services)
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shared_buffers = 512MB
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effective_cache_size = 2GB
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work_mem = 16MB
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maintenance_work_mem = 128MB
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# Logging
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log_min_duration_statement = 1000
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log_checkpoints = on
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