65 lines
1.5 KiB
Markdown
65 lines
1.5 KiB
Markdown
# Postgresql
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## Operation
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Refer to Ansible playbook
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## File management
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```bash
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# console
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## cluster
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scp infra@infra:$POSTGRESQL_BACKUP_PATH/pg_cluster.sql $HOMELAB_PATH/data/backups/infra/postgresql/pg_cluster.sql
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## data
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scp infra@infra:$POSTGRESQL_BACKUP_PATH/pg_backup.sql $HOMELAB_PATH/data/backups/infra/postgresql/pg_backup.sql
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## The data is managed by kopia.
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```
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## Verification
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```bash
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# ... Start postgresql service
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# Create user and database
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podman exec -it -u postgres postgresql "psql -U postgres"
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> CREATE USER service WITH PASSWORD 'abc';
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> CREATE DATABASE service_db;
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> ALTER DATABASE service_db OWNER TO service;
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> \du
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> \l
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> \q
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# Reset database
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> SELECT pg_terminate_backend(pid) FROM pg_stat_activity WHERE datname = 'service_db'; # connection reset
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> DROP DATABASE service_db;
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> CREATE DATABASE service_db;
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> ALTER DATABASE service_db OWNER TO service;
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> \du
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> \l
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> \q
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# Restor database (manually)
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podman exec -u postgres postgresql "psql -U postgres -f $POSTGRESQL_BACKUP_PATH_IN_CONTAINER/script.sql"
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# Backup service executes
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systemctl --user start postgresql-cluster-backup.service
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# Stop and remove all data
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systemctl --stop postgresql
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sudo find "/home/infra/data/containers/postgresql/data" -mindepth 1 -delete
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# Restore database
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# Just locate sql files on data_path, and use playbooks
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# Check restoring
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podman exec -it -u postgres postgresql psql -U postgres
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> \du
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> \l
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# Check extension
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postgres=# SHOW shared_preload_libraries;
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shared_preload_libraries
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--------------------------
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vchord.so
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(1 row)
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```
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