1.0.0 Release IaaS

docs/services/infra/postgresql.md

@@ -0,0 +1,64 @@
+# Postgresql
+
+## Operation
+Refer to Ansible playbook
+
+## File management
+```bash
+# console
+## cluster
+scp infra@infra:$POSTGRESQL_BACKUP_PATH/pg_cluster.sql $HOMELAB_PATH/data/backups/infra/postgresql/pg_cluster.sql
+## data
+scp infra@infra:$POSTGRESQL_BACKUP_PATH/pg_backup.sql $HOMELAB_PATH/data/backups/infra/postgresql/pg_backup.sql
+
+## The data is managed by kopia.
+```
+
+## Verification
+
+```bash
+# ... Start postgresql service
+
+# Create user and database
+podman exec -it -u postgres postgresql "psql -U postgres"
+> CREATE USER service WITH PASSWORD 'abc';
+> CREATE DATABASE service_db;
+> ALTER DATABASE service_db OWNER TO service;
+> \du
+> \l
+> \q
+
+# Reset database
+> SELECT pg_terminate_backend(pid) FROM pg_stat_activity WHERE datname = 'service_db'; # connection reset
+> DROP DATABASE service_db;
+> CREATE DATABASE service_db;
+> ALTER DATABASE service_db OWNER TO service;
+> \du
+> \l
+> \q
+
+# Restor database (manually)
+podman exec -u postgres postgresql "psql -U postgres -f $POSTGRESQL_BACKUP_PATH_IN_CONTAINER/script.sql"
+
+# Backup service executes
+systemctl --user start postgresql-cluster-backup.service
+
+# Stop and remove all data
+systemctl --stop postgresql
+sudo find "/home/infra/data/containers/postgresql/data" -mindepth 1 -delete
+
+# Restore database
+# Just locate sql files on data_path, and use playbooks
+
+# Check restoring
+podman exec -it -u postgres postgresql psql -U postgres
+> \du
+> \l
+
+# Check extension
+postgres=# SHOW shared_preload_libraries;
+ shared_preload_libraries
+--------------------------
+ vchord.so
+(1 row)
+```